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Pino Toscano

2014-Aug-28 13:21 UTC

[Libguestfs] [PATCH 00/13] code refactorings for tools

Hi,

this series does a couple of code reorganizations/refactoring in code
used by tools: the windows path handling code, and the two types of
file editing (using editor, and using perl expression).

There's still a code duplication between the two variants of file
editing, but it is just within a single source, and can be easily
solved now (planning as next step).


Pino Toscano (13):
  edit: move windows path code to common file
  fish, edit: specifies whether mount Windows as readonly
  fish, edit: move the exit-on-case-sensitive-error behaviour to
    virt-edit
  cat: use the common Windows path handling code
  fish: isolate file editing (w/ editor) code in own file
  fish: edit: improve the editor execution
  fish: edit: bring backup extension to file editing w/ editor
  fish: edit: return 1 for unchanged file
  fish: edit: bring the fast-time-edit protection
  fish: edit: add perl file editing
  edit: switch to common editing functions
  fish: edit: add verbose parameter
  customize: use the common perl file editing code

 builder/Makefile.am     |   2 +
 cat/Makefile.am         |   4 +-
 cat/cat.c               | 112 +--------------
 customize/Makefile.am   |   5 +-
 customize/perl_edit-c.c |  55 ++++++++
 customize/perl_edit.ml  |  62 +-------
 edit/Makefile.am        |   6 +-
 edit/edit.c             | 368 +++---------------------------------------------
 fish/Makefile.am        |   2 +
 fish/edit.c             | 125 +---------------
 fish/file-edit.c        | 325 ++++++++++++++++++++++++++++++++++++++++++
 fish/file-edit.h        |  47 +++++++
 fish/windows.c          | 135 ++++++++++++++++++
 fish/windows.h          |  45 ++++++
 po/POTFILES             |   3 +
 sysprep/Makefile.am     |   2 +
 v2v/Makefile.am         |   2 +
 17 files changed, 663 insertions(+), 637 deletions(-)
 create mode 100644 customize/perl_edit-c.c
 create mode 100644 fish/file-edit.c
 create mode 100644 fish/file-edit.h
 create mode 100644 fish/windows.c
 create mode 100644 fish/windows.h

-- 
1.9.3

Pino Toscano

2014-Aug-28 13:21 UTC

head link

[Libguestfs] [PATCH 01/13] edit: move windows path code to common file

Move the code handling Windows paths from virt-edit to a common file,
so that can be shared by various tools.

Mostly code motion, with a minimum touch (the additional guestfs_h*
parameter in mount_drive_letter) to make it build and work.
---
 edit/Makefile.am |   4 +-
 edit/edit.c      | 104 +-----------------------------------------
 fish/windows.c   | 135 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 fish/windows.h   |  44 ++++++++++++++++++
 po/POTFILES      |   1 +
 5 files changed, 184 insertions(+), 104 deletions(-)
 create mode 100644 fish/windows.c
 create mode 100644 fish/windows.h

diff --git a/edit/Makefile.am b/edit/Makefile.am
index 1d51095..cb19bec 100644
--- a/edit/Makefile.am
+++ b/edit/Makefile.am
@@ -33,7 +33,9 @@ SHARED_SOURCE_FILES = \
 	../fish/options.h \
 	../fish/options.c \
 	../fish/uri.h \
-	../fish/uri.c
+	../fish/uri.c \
+	../fish/windows.h \
+	../fish/windows.c
 
 virt_edit_SOURCES = \
 	$(SHARED_SOURCE_FILES) \
diff --git a/edit/edit.c b/edit/edit.c
index 733c911..d4ce747 100644
--- a/edit/edit.c
+++ b/edit/edit.c
@@ -37,6 +37,7 @@
 
 #include "guestfs.h"
 #include "options.h"
+#include "windows.h"
 
 /* Currently open libguestfs handle. */
 guestfs_h *g;
@@ -56,8 +57,6 @@ static void edit_files (int argc, char *argv[]);
 static void edit (const char *filename, const char *root);
 static char *edit_interactively (const char *tmpfile);
 static char *edit_non_interactively (const char *tmpfile);
-static int is_windows (guestfs_h *g, const char *root);
-static char *windows_path (guestfs_h *g, const char *root, const char
*filename);
 static char *generate_random_name (const char *filename);
 static char *generate_backup_name (const char *filename);
 
@@ -527,107 +526,6 @@ edit_non_interactively (const char *tmpfile)
   return ret; /* caller will free */
 }
 
-static int
-is_windows (guestfs_h *g, const char *root)
-{
-  int w;
-  CLEANUP_FREE char *type = guestfs_inspect_get_type (g, root);
-  if (!type)
-    return 0;
-
-  w = STREQ (type, "windows");
-  return w;
-}
-
-static void mount_drive_letter (char drive_letter, const char *root);
-
-static char *
-windows_path (guestfs_h *g, const char *root, const char *path)
-{
-  char *ret;
-  size_t i;
-
-  /* If there is a drive letter, rewrite the path. */
-  if (c_isalpha (path[0]) && path[1] == ':') {
-    char drive_letter = c_tolower (path[0]);
-    /* This returns the newly allocated string. */
-    mount_drive_letter (drive_letter, root);
-    ret = strdup (path + 2);
-    if (ret == NULL) {
-      perror ("strdup");
-      exit (EXIT_FAILURE);
-    }
-  }
-  else if (!*path) {
-    ret = strdup ("/");
-    if (ret == NULL) {
-      perror ("strdup");
-      exit (EXIT_FAILURE);
-    }
-  }
-  else {
-    ret = strdup (path);
-    if (ret == NULL) {
-      perror ("strdup");
-      exit (EXIT_FAILURE);
-    }
-  }
-
-  /* Blindly convert any backslashes into forward slashes.  Is this good? */
-  for (i = 0; i < strlen (ret); ++i)
-    if (ret[i] == '\\')
-      ret[i] = '/';
-
-  char *t = guestfs_case_sensitive_path (g, ret);
-  free (ret);
-  ret = t;
-  if (ret == NULL)
-    exit (EXIT_FAILURE);
-
-  return ret;
-}
-
-static void
-mount_drive_letter (char drive_letter, const char *root)
-{
-  char *device;
-  size_t i;
-
-  /* Resolve the drive letter using the drive mappings table. */
-  CLEANUP_FREE_STRING_LIST char **drives -   
guestfs_inspect_get_drive_mappings (g, root);
-  if (drives == NULL || drives[0] == NULL) {
-    fprintf (stderr, _("%s: to use Windows drive letters, this must be a
Windows guest\n"),
-             program_name);
-    exit (EXIT_FAILURE);
-  }
-
-  device = NULL;
-  for (i = 0; drives[i] != NULL; i += 2) {
-    if (c_tolower (drives[i][0]) == drive_letter && drives[i][1] ==
'\0') {
-      device = drives[i+1];
-      break;
-    }
-  }
-
-  if (device == NULL) {
-    fprintf (stderr, _("%s: drive '%c:' not found.\n"),
-             program_name, drive_letter);
-    exit (EXIT_FAILURE);
-  }
-
-  /* Unmount current disk and remount device. */
-  if (guestfs_umount_all (g) == -1)
-    exit (EXIT_FAILURE);
-
-  if (guestfs_mount (g, device, "/") == -1)
-    exit (EXIT_FAILURE);
-
-  /* Don't need to free (device) because that string was in the
-   * drives array.
-   */
-}
-
 static char
 random_char (void)
 {
diff --git a/fish/windows.c b/fish/windows.c
new file mode 100644
index 0000000..ddf2af1
--- /dev/null
+++ b/fish/windows.c
@@ -0,0 +1,135 @@
+/* libguestfs - shared Windows path for tools
+ * Copyright (C) 2009-2014 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
USA.
+ */
+
+#include <config.h>
+
+#include "windows.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <locale.h>
+#include <langinfo.h>
+#include <libintl.h>
+
+#include "guestfs-internal-frontend.h"
+
+#include "c-ctype.h"
+
+static void mount_drive_letter (guestfs_h *g, char drive_letter,
+                                const char *root);
+
+int
+is_windows (guestfs_h *g, const char *root)
+{
+  int w;
+  CLEANUP_FREE char *type = guestfs_inspect_get_type (g, root);
+  if (!type)
+    return 0;
+
+  w = STREQ (type, "windows");
+  return w;
+}
+
+char *
+windows_path (guestfs_h *g, const char *root, const char *path)
+{
+  char *ret;
+  size_t i;
+
+  /* If there is a drive letter, rewrite the path. */
+  if (c_isalpha (path[0]) && path[1] == ':') {
+    char drive_letter = c_tolower (path[0]);
+    /* This returns the newly allocated string. */
+    mount_drive_letter (g, drive_letter, root);
+    ret = strdup (path + 2);
+    if (ret == NULL) {
+      perror ("strdup");
+      exit (EXIT_FAILURE);
+    }
+  }
+  else if (!*path) {
+    ret = strdup ("/");
+    if (ret == NULL) {
+      perror ("strdup");
+      exit (EXIT_FAILURE);
+    }
+  }
+  else {
+    ret = strdup (path);
+    if (ret == NULL) {
+      perror ("strdup");
+      exit (EXIT_FAILURE);
+    }
+  }
+
+  /* Blindly convert any backslashes into forward slashes.  Is this good? */
+  for (i = 0; i < strlen (ret); ++i)
+    if (ret[i] == '\\')
+      ret[i] = '/';
+
+  char *t = guestfs_case_sensitive_path (g, ret);
+  free (ret);
+  ret = t;
+  if (ret == NULL)
+    exit (EXIT_FAILURE);
+
+  return ret;
+}
+
+static void
+mount_drive_letter (guestfs_h *g, char drive_letter, const char *root)
+{
+  char *device;
+  size_t i;
+
+  /* Resolve the drive letter using the drive mappings table. */
+  CLEANUP_FREE_STRING_LIST char **drives +   
guestfs_inspect_get_drive_mappings (g, root);
+  if (drives == NULL || drives[0] == NULL) {
+    fprintf (stderr, _("%s: to use Windows drive letters, this must be a
Windows guest\n"),
+             program_name);
+    exit (EXIT_FAILURE);
+  }
+
+  device = NULL;
+  for (i = 0; drives[i] != NULL; i += 2) {
+    if (c_tolower (drives[i][0]) == drive_letter && drives[i][1] ==
'\0') {
+      device = drives[i+1];
+      break;
+    }
+  }
+
+  if (device == NULL) {
+    fprintf (stderr, _("%s: drive '%c:' not found.\n"),
+             program_name, drive_letter);
+    exit (EXIT_FAILURE);
+  }
+
+  /* Unmount current disk and remount device. */
+  if (guestfs_umount_all (g) == -1)
+    exit (EXIT_FAILURE);
+
+  if (guestfs_mount (g, device, "/") == -1)
+    exit (EXIT_FAILURE);
+
+  /* Don't need to free (device) because that string was in the
+   * drives array.
+   */
+}
diff --git a/fish/windows.h b/fish/windows.h
new file mode 100644
index 0000000..bb68634
--- /dev/null
+++ b/fish/windows.h
@@ -0,0 +1,44 @@
+/* libguestfs - shared Windows path for tools
+ * Copyright (C) 2009-2014 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
USA.
+ */
+
+#ifndef FISH_WINDOWS_H
+#define FISH_WINDOWS_H
+
+#include <guestfs.h>
+
+/**
+ * Checks whether 'root' is a Windows installation.
+ *
+ * This relies on an already being done introspection.
+ */
+extern int is_windows (guestfs_h *g, const char *root);
+
+/**
+ * Resolves 'path' as possible Windows path according to
'root',
+ * giving a new path that can be used in libguestfs API calls.
+ *
+ * Notes:
+ *  - 'root' must be a Windows installation
+ *  - relies on an already being done introspection
+ *  - will unmount all the existing mount points and mount the Windows root
+ *  - will exit() on memory allocation failures, and if it is not possible
+ *    to get the true path on case-insensitive filesystems
+ */
+extern char *windows_path (guestfs_h *g, const char *root, const char *path);
+
+#endif
diff --git a/po/POTFILES b/po/POTFILES
index 3d208d5..d40cf9b 100644
--- a/po/POTFILES
+++ b/po/POTFILES
@@ -160,6 +160,7 @@ fish/supported.c
 fish/tilde.c
 fish/time.c
 fish/uri.c
+fish/windows.c
 format/format.c
 fuse/guestmount.c
 fuse/guestunmount.c
-- 
1.9.3

Pino Toscano

2014-Aug-28 13:21 UTC

head link

[Libguestfs] [PATCH 02/13] fish, edit: specifies whether mount Windows as readonly

---
 edit/edit.c    |  3 ++-
 fish/windows.c | 11 ++++++-----
 fish/windows.h |  4 +++-
 3 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/edit/edit.c b/edit/edit.c
index d4ce747..cd91b5f 100644
--- a/edit/edit.c
+++ b/edit/edit.c
@@ -336,7 +336,8 @@ edit (const char *filename, const char *root)
 
   /* Windows?  Special handling is required. */
   if (root != NULL && is_windows (g, root))
-    filename = filename_to_free = windows_path (g, root, filename);
+    filename = filename_to_free = windows_path (g, root, filename,
+                                                0 /* not read only */);
 
   /* Download the file to a temporary. */
   fd = mkstemp (tmpfile);
diff --git a/fish/windows.c b/fish/windows.c
index ddf2af1..06dcab3 100644
--- a/fish/windows.c
+++ b/fish/windows.c
@@ -33,7 +33,7 @@
 #include "c-ctype.h"
 
 static void mount_drive_letter (guestfs_h *g, char drive_letter,
-                                const char *root);
+                                const char *root, int readonly);
 
 int
 is_windows (guestfs_h *g, const char *root)
@@ -48,7 +48,7 @@ is_windows (guestfs_h *g, const char *root)
 }
 
 char *
-windows_path (guestfs_h *g, const char *root, const char *path)
+windows_path (guestfs_h *g, const char *root, const char *path, int readonly)
 {
   char *ret;
   size_t i;
@@ -57,7 +57,7 @@ windows_path (guestfs_h *g, const char *root, const char
*path)
   if (c_isalpha (path[0]) && path[1] == ':') {
     char drive_letter = c_tolower (path[0]);
     /* This returns the newly allocated string. */
-    mount_drive_letter (g, drive_letter, root);
+    mount_drive_letter (g, drive_letter, root, readonly);
     ret = strdup (path + 2);
     if (ret == NULL) {
       perror ("strdup");
@@ -94,7 +94,8 @@ windows_path (guestfs_h *g, const char *root, const char
*path)
 }
 
 static void
-mount_drive_letter (guestfs_h *g, char drive_letter, const char *root)
+mount_drive_letter (guestfs_h *g, char drive_letter, const char *root,
+                    int readonly)
 {
   char *device;
   size_t i;
@@ -126,7 +127,7 @@ mount_drive_letter (guestfs_h *g, char drive_letter, const
char *root)
   if (guestfs_umount_all (g) == -1)
     exit (EXIT_FAILURE);
 
-  if (guestfs_mount (g, device, "/") == -1)
+  if ((readonly ? guestfs_mount_ro : guestfs_mount) (g, device, "/")
== -1)
     exit (EXIT_FAILURE);
 
   /* Don't need to free (device) because that string was in the
diff --git a/fish/windows.h b/fish/windows.h
index bb68634..5543182 100644
--- a/fish/windows.h
+++ b/fish/windows.h
@@ -36,9 +36,11 @@ extern int is_windows (guestfs_h *g, const char *root);
  *  - 'root' must be a Windows installation
  *  - relies on an already being done introspection
  *  - will unmount all the existing mount points and mount the Windows root
+ *    (according to 'readonly')
  *  - will exit() on memory allocation failures, and if it is not possible
  *    to get the true path on case-insensitive filesystems
  */
-extern char *windows_path (guestfs_h *g, const char *root, const char *path);
+extern char *windows_path (guestfs_h *g, const char *root, const char *path,
+                           int readonly);
 
 #endif
-- 
1.9.3

Pino Toscano

2014-Aug-28 13:21 UTC

head link

[Libguestfs] [PATCH 03/13] fish, edit: move the exit-on-case-sensitive-error behaviour to virt-edit

Do not unconditionally exit if guestfs_case_sensitive_path, but let
windows_path still return null. Make virt-edit then check for that, and
eventually exit on its own.
---
 edit/edit.c    | 5 ++++-
 fish/windows.c | 3 +--
 fish/windows.h | 3 +--
 3 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/edit/edit.c b/edit/edit.c
index cd91b5f..1f5ec7b 100644
--- a/edit/edit.c
+++ b/edit/edit.c
@@ -335,9 +335,12 @@ edit (const char *filename, const char *root)
   CLEANUP_FREE char *backupname = NULL;
 
   /* Windows?  Special handling is required. */
-  if (root != NULL && is_windows (g, root))
+  if (root != NULL && is_windows (g, root)) {
     filename = filename_to_free = windows_path (g, root, filename,
                                                 0 /* not read only */);
+    if (filename == NULL)
+      exit (EXIT_FAILURE);
+  }
 
   /* Download the file to a temporary. */
   fd = mkstemp (tmpfile);
diff --git a/fish/windows.c b/fish/windows.c
index 06dcab3..04ead2f 100644
--- a/fish/windows.c
+++ b/fish/windows.c
@@ -84,11 +84,10 @@ windows_path (guestfs_h *g, const char *root, const char
*path, int readonly)
     if (ret[i] == '\\')
       ret[i] = '/';
 
+  /* If this fails, we want to return NULL. */
   char *t = guestfs_case_sensitive_path (g, ret);
   free (ret);
   ret = t;
-  if (ret == NULL)
-    exit (EXIT_FAILURE);
 
   return ret;
 }
diff --git a/fish/windows.h b/fish/windows.h
index 5543182..c543604 100644
--- a/fish/windows.h
+++ b/fish/windows.h
@@ -37,8 +37,7 @@ extern int is_windows (guestfs_h *g, const char *root);
  *  - relies on an already being done introspection
  *  - will unmount all the existing mount points and mount the Windows root
  *    (according to 'readonly')
- *  - will exit() on memory allocation failures, and if it is not possible
- *    to get the true path on case-insensitive filesystems
+ *  - will exit() on memory allocation failures
  */
 extern char *windows_path (guestfs_h *g, const char *root, const char *path,
                            int readonly);
-- 
1.9.3

Pino Toscano

2014-Aug-28 13:21 UTC

head link

[Libguestfs] [PATCH 04/13] cat: use the common Windows path handling code

---
 cat/Makefile.am |   4 +-
 cat/cat.c       | 112 ++------------------------------------------------------
 2 files changed, 6 insertions(+), 110 deletions(-)

diff --git a/cat/Makefile.am b/cat/Makefile.am
index 55710a3..14b8e81 100644
--- a/cat/Makefile.am
+++ b/cat/Makefile.am
@@ -42,7 +42,9 @@ SHARED_SOURCE_FILES = \
 	../fish/options.h \
 	../fish/options.c \
 	../fish/uri.h \
-	../fish/uri.c
+	../fish/uri.c \
+	../fish/windows.h \
+	../fish/windows.c
 
 virt_cat_SOURCES = \
 	$(SHARED_SOURCE_FILES) \
diff --git a/cat/cat.c b/cat/cat.c
index def8280..a1d9f83 100644
--- a/cat/cat.c
+++ b/cat/cat.c
@@ -33,6 +33,7 @@
 
 #include "guestfs.h"
 #include "options.h"
+#include "windows.h"
 
 /* Currently open libguestfs handle. */
 guestfs_h *g;
@@ -46,8 +47,6 @@ const char *libvirt_uri = NULL;
 int inspector = 1;
 
 static int do_cat (int argc, char *argv[]);
-static int is_windows (guestfs_h *g, const char *root);
-static char *windows_path (guestfs_h *g, const char *root, const char
*filename);
 
 static void __attribute__((noreturn))
 usage (int status)
@@ -285,7 +284,8 @@ do_cat (int argc, char *argv[])
     const char *filename = argv[i];
 
     if (windows) {
-      filename = filename_to_free = windows_path (g, root, filename);
+      filename = filename_to_free = windows_path (g, root, filename,
+                                                  1 /* readonly */);
       if (filename == NULL) {
         errors++;
         continue;
@@ -298,109 +298,3 @@ do_cat (int argc, char *argv[])
 
   return errors == 0 ? 0 : -1;
 }
-
-static int
-is_windows (guestfs_h *g, const char *root)
-{
-  char *type;
-  int w;
-
-  type = guestfs_inspect_get_type (g, root);
-  if (!type)
-    return 0;
-
-  w = STREQ (type, "windows");
-  free (type);
-  return w;
-}
-
-static void mount_drive_letter_ro (char drive_letter, const char *root);
-
-static char *
-windows_path (guestfs_h *g, const char *root, const char *path)
-{
-  char *ret;
-  size_t i;
-
-  /* If there is a drive letter, rewrite the path. */
-  if (c_isalpha (path[0]) && path[1] == ':') {
-    char drive_letter = c_tolower (path[0]);
-    /* This returns the newly allocated string. */
-    mount_drive_letter_ro (drive_letter, root);
-    ret = strdup (path + 2);
-    if (ret == NULL) {
-      perror ("strdup");
-      exit (EXIT_FAILURE);
-    }
-  }
-  else if (!*path) {
-    ret = strdup ("/");
-    if (ret == NULL) {
-      perror ("strdup");
-      exit (EXIT_FAILURE);
-    }
-  }
-  else {
-    ret = strdup (path);
-    if (ret == NULL) {
-      perror ("strdup");
-      exit (EXIT_FAILURE);
-    }
-  }
-
-  /* Blindly convert any backslashes into forward slashes.  Is this good? */
-  for (i = 0; i < strlen (ret); ++i)
-    if (ret[i] == '\\')
-      ret[i] = '/';
-
-  /* If this fails, we want to return NULL. */
-  char *t = guestfs_case_sensitive_path (g, ret);
-  free (ret);
-  ret = t;
-
-  return ret;
-}
-
-static void
-mount_drive_letter_ro (char drive_letter, const char *root)
-{
-  char **drives;
-  char *device;
-  size_t i;
-
-  /* Resolve the drive letter using the drive mappings table. */
-  drives = guestfs_inspect_get_drive_mappings (g, root);
-  if (drives == NULL || drives[0] == NULL) {
-    fprintf (stderr, _("%s: to use Windows drive letters, this must be a
Windows guest\n"),
-             program_name);
-    exit (EXIT_FAILURE);
-  }
-
-  device = NULL;
-  for (i = 0; drives[i] != NULL; i += 2) {
-    if (c_tolower (drives[i][0]) == drive_letter && drives[i][1] ==
'\0') {
-      device = drives[i+1];
-      break;
-    }
-  }
-
-  if (device == NULL) {
-    fprintf (stderr, _("%s: drive '%c:' not found.\n"),
-             program_name, drive_letter);
-    exit (EXIT_FAILURE);
-  }
-
-  /* Unmount current disk and remount device. */
-  if (guestfs_umount_all (g) == -1)
-    exit (EXIT_FAILURE);
-
-  if (guestfs_mount_ro (g, device, "/") == -1)
-    exit (EXIT_FAILURE);
-
-  for (i = 0; drives[i] != NULL; ++i)
-    free (drives[i]);
-  free (drives);
-  /* Don't need to free (device) because that string was in the
-   * drives array.
-   */
-}
-- 
1.9.3

Pino Toscano

2014-Aug-28 13:21 UTC

head link

[Libguestfs] [PATCH 05/13] fish: isolate file editing (w/ editor) code in own file

Move the implementation of file editing using editor to an own file, so
that can be shared by different tools.

Mostly code motion.
---
 fish/Makefile.am |   2 +
 fish/edit.c      | 125 ++-----------------------------------------
 fish/file-edit.c | 158 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 fish/file-edit.h |  32 +++++++++++
 po/POTFILES      |   1 +
 5 files changed, 198 insertions(+), 120 deletions(-)
 create mode 100644 fish/file-edit.c
 create mode 100644 fish/file-edit.h

diff --git a/fish/Makefile.am b/fish/Makefile.am
index c02f703..d28a94b 100644
--- a/fish/Makefile.am
+++ b/fish/Makefile.am
@@ -87,6 +87,8 @@ guestfish_SOURCES = \
 	echo.c \
 	edit.c \
 	events.c \
+	file-edit.c \
+	file-edit.h \
 	fish.c \
 	fish.h \
 	glob.c \
diff --git a/fish/edit.c b/fish/edit.c
index bd02f4b..5b851e7 100644
--- a/fish/edit.c
+++ b/fish/edit.c
@@ -22,29 +22,20 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
-#include <fcntl.h>
 #include <inttypes.h>
 #include <libintl.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <assert.h>
 
 #include "fish.h"
-
-static char *generate_random_name (const char *filename);
+#include "file-edit.h"
 
 /* guestfish edit command, suggested by Ján Ondrej, implemented by RWMJ */
 
 int
 run_edit (const char *cmd, size_t argc, char *argv[])
 {
-  CLEANUP_FREE char *tmpdir = guestfs_get_tmpdir (g);
-  CLEANUP_UNLINK_FREE char *filename = NULL;
-  char buf[256];
   const char *editor;
-  CLEANUP_FREE char *remotefilename = NULL, *newname = NULL;
-  struct stat oldstat, newstat;
-  int r, fd;
+  CLEANUP_FREE char *remotefilename = NULL;
+  int r;
 
   if (argc != 1) {
     fprintf (stderr, _("use '%s filename' to edit a file\n"),
cmd);
@@ -67,113 +58,7 @@ run_edit (const char *cmd, size_t argc, char *argv[])
   if (remotefilename == NULL)
     return -1;
 
-  /* Download the file and write it to a temporary. */
-  if (asprintf (&filename, "%s/guestfishXXXXXX", tmpdir) == -1) {
-    perror ("asprintf");
-    return -1;
-  }
-
-  fd = mkstemp (filename);
-  if (fd == -1) {
-    perror ("mkstemp");
-    return -1;
-  }
-
-  snprintf (buf, sizeof buf, "/dev/fd/%d", fd);
-
-  if (guestfs_download (g, remotefilename, buf) == -1) {
-    close (fd);
-    return -1;
-  }
-
-  if (close (fd) == -1) {
-    perror (filename);
-    return -1;
-  }
-
-  /* Get the old stat. */
-  if (stat (filename, &oldstat) == -1) {
-    perror (filename);
-    return -1;
-  }
-
-  /* Edit it. */
-  /* XXX Safe? */
-  snprintf (buf, sizeof buf, "%s %s", editor, filename);
-
-  r = system (buf);
-  if (r != 0) {
-    perror (buf);
-    return -1;
-  }
-
-  /* Get the new stat. */
-  if (stat (filename, &newstat) == -1) {
-    perror (filename);
-    return -1;
-  }
-
-  /* Changed? */
-  if (oldstat.st_ctime == newstat.st_ctime &&
-      oldstat.st_size == newstat.st_size)
-    return 0;
-
-  /* Upload to a new file in the same directory, so if it fails we
-   * don't end up with a partially written file.  Give the new file
-   * a completely random name so we have only a tiny chance of
-   * overwriting some existing file.
-   */
-  newname = generate_random_name (remotefilename);
-  if (!newname)
-    return -1;
-
-  /* Write new content. */
-  if (guestfs_upload (g, filename, newname) == -1)
-    return -1;
-
-  /* Set the permissions, UID, GID and SELinux context of the new
-   * file to match the old file (RHBZ#788641).
-   */
-  if (guestfs_copy_attributes (g, remotefilename, newname,
-      GUESTFS_COPY_ATTRIBUTES_ALL, 1, -1) == -1)
-    return -1;
-
-  if (guestfs_mv (g, newname, remotefilename) == -1)
-    return -1;
-
-  return 0;
-}
-
-static char
-random_char (void)
-{
-  char c[] =
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
-  return c[random () % (sizeof c - 1)];
-}
-
-static char *
-generate_random_name (const char *filename)
-{
-  char *ret, *p;
-  size_t i;
-
-  ret = malloc (strlen (filename) + 16);
-  if (!ret) {
-    perror ("malloc");
-    return NULL;
-  }
-  strcpy (ret, filename);
-
-  p = strrchr (ret, '/');
-  assert (p);
-  p++;
-
-  /* Because of "+ 16" above, there should be enough space in the
-   * output buffer to write 8 random characters here.
-   */
-  for (i = 0; i < 8; ++i)
-    *p++ = random_char ();
-  *p++ = '\0';
+  r = edit_file_editor (g, remotefilename, editor);
 
-  return ret; /* caller will free */
+  return r;
 }
diff --git a/fish/file-edit.c b/fish/file-edit.c
new file mode 100644
index 0000000..ec707a9
--- /dev/null
+++ b/fish/file-edit.c
@@ -0,0 +1,158 @@
+/* libguestfs - shared file editing
+ * Copyright (C) 2009-2014 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
USA.
+ */
+
+#include <config.h>
+
+#include "file-edit.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <locale.h>
+#include <langinfo.h>
+#include <libintl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <assert.h>
+
+#include "guestfs-internal-frontend.h"
+
+static char *generate_random_name (const char *filename);
+
+int
+edit_file_editor (guestfs_h *g, const char *filename, const char *editor)
+{
+  CLEANUP_FREE char *tmpdir = guestfs_get_tmpdir (g);
+  CLEANUP_UNLINK_FREE char *tmpfilename = NULL;
+  char buf[256];
+  CLEANUP_FREE char *newname = NULL;
+  struct stat oldstat, newstat;
+  int r, fd;
+
+  /* Download the file and write it to a temporary. */
+  if (asprintf (&tmpfilename, "%s/libguestfsXXXXXX", tmpdir) ==
-1) {
+    perror ("asprintf");
+    return -1;
+  }
+
+  fd = mkstemp (tmpfilename);
+  if (fd == -1) {
+    perror ("mkstemp");
+    return -1;
+  }
+
+  snprintf (buf, sizeof buf, "/dev/fd/%d", fd);
+
+  if (guestfs_download (g, filename, buf) == -1) {
+    close (fd);
+    return -1;
+  }
+
+  if (close (fd) == -1) {
+    perror (tmpfilename);
+    return -1;
+  }
+
+  /* Get the old stat. */
+  if (stat (tmpfilename, &oldstat) == -1) {
+    perror (tmpfilename);
+    return -1;
+  }
+
+  /* Edit it. */
+  /* XXX Safe? */
+  snprintf (buf, sizeof buf, "%s %s", editor, filename);
+
+  r = system (buf);
+  if (r != 0) {
+    perror (buf);
+    return -1;
+  }
+
+  /* Get the new stat. */
+  if (stat (tmpfilename, &newstat) == -1) {
+    perror (tmpfilename);
+    return -1;
+  }
+
+  /* Changed? */
+  if (oldstat.st_ctime == newstat.st_ctime &&
+      oldstat.st_size == newstat.st_size)
+    return 0;
+
+  /* Upload to a new file in the same directory, so if it fails we
+   * don't end up with a partially written file.  Give the new file
+   * a completely random name so we have only a tiny chance of
+   * overwriting some existing file.
+   */
+  newname = generate_random_name (filename);
+  if (!newname)
+    return -1;
+
+  /* Write new content. */
+  if (guestfs_upload (g, tmpfilename, newname) == -1)
+    return -1;
+
+  /* Set the permissions, UID, GID and SELinux context of the new
+   * file to match the old file (RHBZ#788641).
+   */
+  if (guestfs_copy_attributes (g, filename, newname,
+      GUESTFS_COPY_ATTRIBUTES_ALL, 1, -1) == -1)
+    return -1;
+
+  if (guestfs_mv (g, newname, filename) == -1)
+    return -1;
+
+  return 0;
+}
+
+static char
+random_char (void)
+{
+  const char c[] =
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
+  return c[random () % (sizeof c - 1)];
+}
+
+static char *
+generate_random_name (const char *filename)
+{
+  char *ret, *p;
+  size_t i;
+
+  ret = malloc (strlen (filename) + 16);
+  if (!ret) {
+    perror ("malloc");
+    return NULL;
+  }
+  strcpy (ret, filename);
+
+  p = strrchr (ret, '/');
+  assert (p);
+  p++;
+
+  /* Because of "+ 16" above, there should be enough space in the
+   * output buffer to write 8 random characters here.
+   */
+  for (i = 0; i < 8; ++i)
+    *p++ = random_char ();
+  *p++ = '\0';
+
+  return ret; /* caller will free */
+}
diff --git a/fish/file-edit.h b/fish/file-edit.h
new file mode 100644
index 0000000..eff1c7d
--- /dev/null
+++ b/fish/file-edit.h
@@ -0,0 +1,32 @@
+/* libguestfs - shared file editing
+ * Copyright (C) 2009-2014 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
USA.
+ */
+
+#ifndef FISH_FILE_EDIT_H
+#define FISH_FILE_EDIT_H
+
+#include <guestfs.h>
+
+/**
+ * Edit 'filename' using the specified 'editor' application.
+ *
+ * Returns -1 for failure, 0 otherwise.
+ */
+extern int edit_file_editor (guestfs_h *g, const char *filename,
+                             const char *editor);
+
+#endif
diff --git a/po/POTFILES b/po/POTFILES
index d40cf9b..a31cc88 100644
--- a/po/POTFILES
+++ b/po/POTFILES
@@ -135,6 +135,7 @@ fish/echo.c
 fish/edit.c
 fish/event-names.c
 fish/events.c
+fish/file-edit.c
 fish/fish.c
 fish/glob.c
 fish/help.c
-- 
1.9.3

Pino Toscano

2014-Aug-28 13:21 UTC

head link

[Libguestfs] [PATCH 06/13] fish: edit: improve the editor execution

Dynamically allocate the buffer for the command, and check also its exit
status.

Improvements taken from the current implementation in virt-edit.
---
 fish/file-edit.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/fish/file-edit.c b/fish/file-edit.c
index ec707a9..408d20e 100644
--- a/fish/file-edit.c
+++ b/fish/file-edit.c
@@ -43,6 +43,7 @@ edit_file_editor (guestfs_h *g, const char *filename, const
char *editor)
   CLEANUP_UNLINK_FREE char *tmpfilename = NULL;
   char buf[256];
   CLEANUP_FREE char *newname = NULL;
+  CLEANUP_FREE char *cmd = NULL;
   struct stat oldstat, newstat;
   int r, fd;
 
@@ -77,12 +78,14 @@ edit_file_editor (guestfs_h *g, const char *filename, const
char *editor)
   }
 
   /* Edit it. */
-  /* XXX Safe? */
-  snprintf (buf, sizeof buf, "%s %s", editor, filename);
+  if (asprintf (&cmd, "%s %s", editor, tmpfilename) == -1) {
+    perror ("asprintf");
+    return -1;
+  }
 
-  r = system (buf);
-  if (r != 0) {
-    perror (buf);
+  r = system (cmd);
+  if (r == -1 || WEXITSTATUS (r) != 0) {
+    perror (cmd);
     return -1;
   }
 
-- 
1.9.3

Pino Toscano

2014-Aug-28 13:21 UTC

head link

[Libguestfs] [PATCH 07/13] fish: edit: bring backup extension to file editing w/ editor

Bring the backup extension feature from the perl-like file mode
implementation, although currently not making use of it.
---
 fish/edit.c      |  2 +-
 fish/file-edit.c | 31 ++++++++++++++++++++++++++++++-
 fish/file-edit.h |  4 +++-
 3 files changed, 34 insertions(+), 3 deletions(-)

diff --git a/fish/edit.c b/fish/edit.c
index 5b851e7..0170daf 100644
--- a/fish/edit.c
+++ b/fish/edit.c
@@ -58,7 +58,7 @@ run_edit (const char *cmd, size_t argc, char *argv[])
   if (remotefilename == NULL)
     return -1;
 
-  r = edit_file_editor (g, remotefilename, editor);
+  r = edit_file_editor (g, remotefilename, editor, NULL);
 
   return r;
 }
diff --git a/fish/file-edit.c b/fish/file-edit.c
index 408d20e..8efa452 100644
--- a/fish/file-edit.c
+++ b/fish/file-edit.c
@@ -35,9 +35,12 @@
 #include "guestfs-internal-frontend.h"
 
 static char *generate_random_name (const char *filename);
+static char *generate_backup_name (const char *filename,
+                                   const char *backup_extension);
 
 int
-edit_file_editor (guestfs_h *g, const char *filename, const char *editor)
+edit_file_editor (guestfs_h *g, const char *filename, const char *editor,
+                  const char *backup_extension)
 {
   CLEANUP_FREE char *tmpdir = guestfs_get_tmpdir (g);
   CLEANUP_UNLINK_FREE char *tmpfilename = NULL;
@@ -120,6 +123,17 @@ edit_file_editor (guestfs_h *g, const char *filename, const
char *editor)
       GUESTFS_COPY_ATTRIBUTES_ALL, 1, -1) == -1)
     return -1;
 
+  /* Backup or overwrite the file. */
+  if (backup_extension) {
+    CLEANUP_FREE char *backupname = NULL;
+
+    backupname = generate_backup_name (filename, backup_extension);
+    if (backupname == NULL)
+      return -1;
+
+    if (guestfs_mv (g, filename, backupname) == -1)
+      return -1;
+  }
   if (guestfs_mv (g, newname, filename) == -1)
     return -1;
 
@@ -159,3 +173,18 @@ generate_random_name (const char *filename)
 
   return ret; /* caller will free */
 }
+
+static char *
+generate_backup_name (const char *filename, const char *backup_extension)
+{
+  char *ret;
+
+  assert (backup_extension != NULL);
+
+  if (asprintf (&ret, "%s%s", filename, backup_extension) == -1)
{
+    perror ("asprintf");
+    return NULL;
+  }
+
+  return ret; /* caller will free */
+}
diff --git a/fish/file-edit.h b/fish/file-edit.h
index eff1c7d..6622b3a 100644
--- a/fish/file-edit.h
+++ b/fish/file-edit.h
@@ -23,10 +23,12 @@
 
 /**
  * Edit 'filename' using the specified 'editor' application.
+ * If 'backup_extension' is not null, then a copy of 'filename'
is saved
+ * with 'backup_extension' appended to its file name.
  *
  * Returns -1 for failure, 0 otherwise.
  */
 extern int edit_file_editor (guestfs_h *g, const char *filename,
-                             const char *editor);
+                             const char *editor, const char *backup_extension);
 
 #endif
-- 
1.9.3

Pino Toscano

2014-Aug-28 13:21 UTC

head link

[Libguestfs] [PATCH 08/13] fish: edit: return 1 for unchanged file

Change the return value of edit_file_editor to 1, in case the editor did
not change the (temporary) file.
---
 fish/edit.c      | 2 +-
 fish/file-edit.c | 2 +-
 fish/file-edit.h | 3 ++-
 3 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/fish/edit.c b/fish/edit.c
index 0170daf..f43ef3b 100644
--- a/fish/edit.c
+++ b/fish/edit.c
@@ -60,5 +60,5 @@ run_edit (const char *cmd, size_t argc, char *argv[])
 
   r = edit_file_editor (g, remotefilename, editor, NULL);
 
-  return r;
+  return r == -1 ? -1 : 0;
 }
diff --git a/fish/file-edit.c b/fish/file-edit.c
index 8efa452..3a9dd2d 100644
--- a/fish/file-edit.c
+++ b/fish/file-edit.c
@@ -101,7 +101,7 @@ edit_file_editor (guestfs_h *g, const char *filename, const
char *editor,
   /* Changed? */
   if (oldstat.st_ctime == newstat.st_ctime &&
       oldstat.st_size == newstat.st_size)
-    return 0;
+    return 1;
 
   /* Upload to a new file in the same directory, so if it fails we
    * don't end up with a partially written file.  Give the new file
diff --git a/fish/file-edit.h b/fish/file-edit.h
index 6622b3a..1d401c6 100644
--- a/fish/file-edit.h
+++ b/fish/file-edit.h
@@ -26,7 +26,8 @@
  * If 'backup_extension' is not null, then a copy of 'filename'
is saved
  * with 'backup_extension' appended to its file name.
  *
- * Returns -1 for failure, 0 otherwise.
+ * Returns -1 for failure, 0 on success, 1 if the editor did not change
+ * the file (e.g. the user closed the editor without saving).
  */
 extern int edit_file_editor (guestfs_h *g, const char *filename,
                              const char *editor, const char *backup_extension);
-- 
1.9.3

Pino Toscano

2014-Aug-28 13:21 UTC

head link

[Libguestfs] [PATCH 09/13] fish: edit: bring the fast-time-edit protection

Bring from virt-edit the small hack of putting the ctime of the
temporary file few seconds back to notice file changes also on fast
editing.
---
 fish/file-edit.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/fish/file-edit.c b/fish/file-edit.c
index 3a9dd2d..e2298eb 100644
--- a/fish/file-edit.c
+++ b/fish/file-edit.c
@@ -31,6 +31,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <assert.h>
+#include <utime.h>
 
 #include "guestfs-internal-frontend.h"
 
@@ -49,6 +50,7 @@ edit_file_editor (guestfs_h *g, const char *filename, const
char *editor,
   CLEANUP_FREE char *cmd = NULL;
   struct stat oldstat, newstat;
   int r, fd;
+  struct utimbuf times;
 
   /* Download the file and write it to a temporary. */
   if (asprintf (&tmpfilename, "%s/libguestfsXXXXXX", tmpdir) ==
-1) {
@@ -74,6 +76,23 @@ edit_file_editor (guestfs_h *g, const char *filename, const
char *editor,
     return -1;
   }
 
+  /* Set the time back a few seconds on the original file.  This is so
+   * that if the user is very fast at editing, or if EDITOR is an
+   * automatic editor, then the edit might happen within the 1 second
+   * granularity of mtime, and we would think the file hasn't changed.
+   */
+  if (stat (tmpfilename, &oldstat) == -1) {
+    perror (tmpfilename);
+    return -1;
+  }
+
+  times.actime = oldstat.st_atime - 5;
+  times.modtime = oldstat.st_mtime - 5;
+  if (utime (tmpfilename, &times) == -1) {
+    perror ("utimes");
+    return -1;
+  }
+
   /* Get the old stat. */
   if (stat (tmpfilename, &oldstat) == -1) {
     perror (tmpfilename);
-- 
1.9.3

Pino Toscano

2014-Aug-28 13:21 UTC

head link

[Libguestfs] [PATCH 10/13] fish: edit: add perl file editing

Add the perl file editing, mostly based in the virt-edit implementation.

This introduces a mild code duplication with edit_file_editor; will deal
with it in a later commit.
---
 fish/file-edit.c | 110 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 fish/file-edit.h |  11 ++++++
 2 files changed, 121 insertions(+)

diff --git a/fish/file-edit.c b/fish/file-edit.c
index e2298eb..fa68626 100644
--- a/fish/file-edit.c
+++ b/fish/file-edit.c
@@ -159,6 +159,116 @@ edit_file_editor (guestfs_h *g, const char *filename,
const char *editor,
   return 0;
 }
 
+int
+edit_file_perl (guestfs_h *g, const char *filename, const char *perl_expr,
+                const char *backup_extension)
+{
+  CLEANUP_FREE char *tmpdir = guestfs_get_tmpdir (g);
+  CLEANUP_UNLINK_FREE char *tmpfilename = NULL;
+  char buf[256];
+  CLEANUP_FREE char *newname = NULL;
+  CLEANUP_FREE char *cmd = NULL;
+  CLEANUP_FREE char *outfile = NULL;
+  int r, fd;
+
+  /* Download the file and write it to a temporary. */
+  if (asprintf (&tmpfilename, "%s/libguestfsXXXXXX", tmpdir) ==
-1) {
+    perror ("asprintf");
+    return -1;
+  }
+
+  fd = mkstemp (tmpfilename);
+  if (fd == -1) {
+    perror ("mkstemp");
+    return -1;
+  }
+
+  snprintf (buf, sizeof buf, "/dev/fd/%d", fd);
+
+  if (guestfs_download (g, filename, buf) == -1) {
+    close (fd);
+    return -1;
+  }
+
+  if (close (fd) == -1) {
+    perror (tmpfilename);
+    return -1;
+  }
+
+  if (asprintf (&outfile, "%s.out", tmpfilename) == -1) {
+    perror ("asprintf");
+    return -1;
+  }
+
+  /* Pass the expression to Perl via the environment.  This sidesteps
+   * any quoting problems with the already complex Perl command line.
+   */
+  setenv ("virt_edit_expr", perl_expr, 1);
+
+  /* Call out to a canned Perl script. */
+  if (asprintf (&cmd,
+                "perl -e '"
+                "$lineno = 0; "
+                "$expr = $ENV{virt_edit_expr}; "
+                "while (<STDIN>) { "
+                "  $lineno++; "
+                "  eval $expr; "
+                "  die if $@; "
+                "  print STDOUT $_ or die \"print: $!\"; "
+                "} "
+                "close STDOUT or die \"close: $!\"; "
+                "' < %s > %s",
+                tmpfilename, outfile) == -1) {
+    perror ("asprintf");
+    return -1;
+  }
+
+  r = system (cmd);
+  if (r == -1 || WEXITSTATUS (r) != 0)
+    return -1;
+
+  if (rename (outfile, tmpfilename) == -1) {
+    perror ("rename");
+    return -1;
+  }
+
+  /* Upload to a new file in the same directory, so if it fails we
+   * don't end up with a partially written file.  Give the new file
+   * a completely random name so we have only a tiny chance of
+   * overwriting some existing file.
+   */
+  newname = generate_random_name (filename);
+  if (!newname)
+    return -1;
+
+  /* Write new content. */
+  if (guestfs_upload (g, tmpfilename, newname) == -1)
+    return -1;
+
+  /* Set the permissions, UID, GID and SELinux context of the new
+   * file to match the old file (RHBZ#788641).
+   */
+  if (guestfs_copy_attributes (g, filename, newname,
+      GUESTFS_COPY_ATTRIBUTES_ALL, 1, -1) == -1)
+    return -1;
+
+  /* Backup or overwrite the file. */
+  if (backup_extension) {
+    CLEANUP_FREE char *backupname = NULL;
+
+    backupname = generate_backup_name (filename, backup_extension);
+    if (backupname == NULL)
+      return -1;
+
+    if (guestfs_mv (g, filename, backupname) == -1)
+      return -1;
+  }
+  if (guestfs_mv (g, newname, filename) == -1)
+    return -1;
+
+  return 0;
+}
+
 static char
 random_char (void)
 {
diff --git a/fish/file-edit.h b/fish/file-edit.h
index 1d401c6..98fc453 100644
--- a/fish/file-edit.h
+++ b/fish/file-edit.h
@@ -32,4 +32,15 @@
 extern int edit_file_editor (guestfs_h *g, const char *filename,
                              const char *editor, const char *backup_extension);
 
+/**
+ * Edit 'filename' running the specified 'perl_expr' using
Perl.
+ * If 'backup_extension' is not null, then a copy of 'filename'
is saved
+ * with 'backup_extension' appended to its file name.
+ *
+ * Returns -1 for failure, 0 otherwise (on success).
+ */
+extern int edit_file_perl (guestfs_h *g, const char *filename,
+                           const char *perl_expr,
+                           const char *backup_extension);
+
 #endif
-- 
1.9.3

Pino Toscano

2014-Aug-28 13:21 UTC

head link

[Libguestfs] [PATCH 11/13] edit: switch to common editing functions

Switch virt-edit to the common edit_file_editor and edit_file_perl.
---
 edit/Makefile.am |   2 +
 edit/edit.c      | 258 ++++---------------------------------------------------
 2 files changed, 19 insertions(+), 241 deletions(-)

diff --git a/edit/Makefile.am b/edit/Makefile.am
index cb19bec..9b1998b 100644
--- a/edit/Makefile.am
+++ b/edit/Makefile.am
@@ -28,6 +28,8 @@ bin_PROGRAMS = virt-edit
 SHARED_SOURCE_FILES = \
 	../fish/config.c \
 	../fish/domain.c \
+	../fish/file-edit.h \
+	../fish/file-edit.c \
 	../fish/inspect.c \
 	../fish/keys.c \
 	../fish/options.h \
diff --git a/edit/edit.c b/edit/edit.c
index 1f5ec7b..70ee129 100644
--- a/edit/edit.c
+++ b/edit/edit.c
@@ -38,6 +38,7 @@
 #include "guestfs.h"
 #include "options.h"
 #include "windows.h"
+#include "file-edit.h"
 
 /* Currently open libguestfs handle. */
 guestfs_h *g;
@@ -55,10 +56,6 @@ static const char *perl_expr = NULL;
 
 static void edit_files (int argc, char *argv[]);
 static void edit (const char *filename, const char *root);
-static char *edit_interactively (const char *tmpfile);
-static char *edit_non_interactively (const char *tmpfile);
-static char *generate_random_name (const char *filename);
-static char *generate_backup_name (const char *filename);
 
 static void __attribute__((noreturn))
 usage (int status)
@@ -324,15 +321,7 @@ static void
 edit (const char *filename, const char *root)
 {
   CLEANUP_FREE char *filename_to_free = NULL;
-  CLEANUP_FREE char *tmpdir = guestfs_get_tmpdir (g);
-  char tmpfile[strlen (tmpdir) + 32];
-  sprintf (tmpfile, "%s/virteditXXXXXX", tmpdir);
-
-  int fd;
-  char fdbuf[32];
-  CLEANUP_FREE char *upload_from = NULL;
-  CLEANUP_FREE char *newname = NULL;
-  CLEANUP_FREE char *backupname = NULL;
+  int r;
 
   /* Windows?  Special handling is required. */
   if (root != NULL && is_windows (g, root)) {
@@ -342,239 +331,26 @@ edit (const char *filename, const char *root)
       exit (EXIT_FAILURE);
   }
 
-  /* Download the file to a temporary. */
-  fd = mkstemp (tmpfile);
-  if (fd == -1) {
-    perror ("mkstemp");
-    exit (EXIT_FAILURE);
-  }
-
-  snprintf (fdbuf, sizeof fdbuf, "/dev/fd/%d", fd);
-
-  if (guestfs_download (g, filename, fdbuf) == -1)
-    goto error;
-
-  if (close (fd) == -1) {
-    perror (tmpfile);
-    goto error;
-  }
-
-  if (!perl_expr)
-    upload_from = edit_interactively (tmpfile);
-  else
-    upload_from = edit_non_interactively (tmpfile);
-
-  /* We don't always need to upload: upload_from could be NULL because
-   * the user closed the editor without changing the file.
-   */
-  if (upload_from) {
-    /* Upload to a new file in the same directory, so if it fails we
-     * don't end up with a partially written file.  Give the new file
-     * a completely random name so we have only a tiny chance of
-     * overwriting some existing file.
-     */
-    newname = generate_random_name (filename);
-
-    if (guestfs_upload (g, upload_from, newname) == -1)
-      goto error;
-
-    /* Set the permissions, UID, GID and SELinux context of the new
-     * file to match the old file (RHBZ#788641).
-     */
-    if (guestfs_copy_attributes (g, filename, newname,
-        GUESTFS_COPY_ATTRIBUTES_ALL, 1, -1) == -1)
-      goto error;
-
-    /* Backup or overwrite the file. */
-    if (backup_extension) {
-      backupname = generate_backup_name (filename);
-      if (guestfs_mv (g, filename, backupname) == -1)
-        goto error;
-    }
-    if (guestfs_mv (g, newname, filename) == -1)
-      goto error;
-  }
-
-  unlink (tmpfile);
-  return;
-
- error:
-  unlink (tmpfile);
-  exit (EXIT_FAILURE);
-}
-
-static char *
-edit_interactively (const char *tmpfile)
-{
-  struct utimbuf times;
-  struct stat oldstat, newstat;
-  const char *editor;
-  CLEANUP_FREE char *cmd = NULL;
-  int r;
-  char *ret;
-
-  /* Set the time back a few seconds on the original file.  This is so
-   * that if the user is very fast at editing, or if EDITOR is an
-   * automatic editor, then the edit might happen within the 1 second
-   * granularity of mtime, and we would think the file hasn't changed.
-   */
-  if (stat (tmpfile, &oldstat) == -1) {
-    perror (tmpfile);
-    exit (EXIT_FAILURE);
-  }
-
-  times.actime = oldstat.st_atime - 5;
-  times.modtime = oldstat.st_mtime - 5;
-  if (utime (tmpfile, &times) == -1) {
-    perror ("utimes");
-    exit (EXIT_FAILURE);
-  }
+  if (perl_expr != NULL) {
+    r = edit_file_perl (g, filename, perl_expr, backup_extension);
+  } else {
+    const char *editor;
 
-  if (stat (tmpfile, &oldstat) == -1) {
-    perror (tmpfile);
-    exit (EXIT_FAILURE);
-  }
-
-  editor = getenv ("EDITOR");
-  if (editor == NULL)
-    editor = "vi";
+    editor = getenv ("EDITOR");
+    if (editor == NULL)
+      editor = "vi";
 
-  if (asprintf (&cmd, "%s %s", editor, tmpfile) == -1) {
-    perror ("asprintf");
-    exit (EXIT_FAILURE);
+    r = edit_file_editor (g, filename, editor, backup_extension);
   }
 
-  if (verbose)
-    fprintf (stderr, "%s\n", cmd);
-
-  r = system (cmd);
-  if (r == -1 || WEXITSTATUS (r) != 0)
+  switch (r) {
+  case -1:
     exit (EXIT_FAILURE);
-
-  if (stat (tmpfile, &newstat) == -1) {
-    perror (tmpfile);
-    exit (EXIT_FAILURE);
-  }
-
-  if (oldstat.st_ctime == newstat.st_ctime &&
-      oldstat.st_mtime == newstat.st_mtime) {
+  case 1:
     printf ("File not changed.\n");
-    return NULL;
-  }
-
-  ret = strdup (tmpfile);
-  if (!ret) {
-    perror ("strdup");
-    exit (EXIT_FAILURE);
+    break;
+  default:
+    /* Success. */
+    break;
   }
-
-  return ret;
-}
-
-/* Note that virt-builder uses exactly the same code .. in OCaml. */
-static char *
-edit_non_interactively (const char *tmpfile)
-{
-  CLEANUP_FREE char *cmd = NULL, *outfile = NULL;
-  char *ret;
-  int r;
-
-  assert (perl_expr != NULL);
-
-  /* Pass the expression to Perl via the environment.  This sidesteps
-   * any quoting problems with the already complex Perl command line.
-   */
-  setenv ("virt_edit_expr", perl_expr, 1);
-
-  /* Call out to a canned Perl script. */
-  if (asprintf (&cmd,
-                "perl -e '"
-                "$lineno = 0; "
-                "$expr = $ENV{virt_edit_expr}; "
-                "while (<STDIN>) { "
-                "  $lineno++; "
-                "  eval $expr; "
-                "  die if $@; "
-                "  print STDOUT $_ or die \"print: $!\"; "
-                "} "
-                "close STDOUT or die \"close: $!\"; "
-                "' < %s > %s.out",
-                tmpfile, tmpfile) == -1) {
-    perror ("asprintf");
-    exit (EXIT_FAILURE);
-  }
-
-  if (verbose)
-    fprintf (stderr, "%s\n", cmd);
-
-  r = system (cmd);
-  if (r == -1 || WEXITSTATUS (r) != 0)
-    exit (EXIT_FAILURE);
-
-  if (asprintf (&outfile, "%s.out", tmpfile) == -1) {
-    perror ("asprintf");
-    exit (EXIT_FAILURE);
-  }
-
-  if (rename (outfile, tmpfile) == -1) {
-    perror ("rename");
-    exit (EXIT_FAILURE);
-  }
-
-  ret = strdup (tmpfile);
-  if (!ret) {
-    perror ("strdup");
-    exit (EXIT_FAILURE);
-  }
-
-  return ret; /* caller will free */
-}
-
-static char
-random_char (void)
-{
-  char c[] =
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
-  return c[random () % (sizeof c - 1)];
-}
-
-static char *
-generate_random_name (const char *filename)
-{
-  char *ret, *p;
-  size_t i;
-
-  ret = malloc (strlen (filename) + 16);
-  if (!ret) {
-    perror ("malloc");
-    exit (EXIT_FAILURE);
-  }
-  strcpy (ret, filename);
-
-  p = strrchr (ret, '/');
-  assert (p);
-  p++;
-
-  /* Because of "+ 16" above, there should be enough space in the
-   * output buffer to write 8 random characters here.
-   */
-  for (i = 0; i < 8; ++i)
-    *p++ = random_char ();
-  *p++ = '\0';
-
-  return ret; /* caller will free */
-}
-
-static char *
-generate_backup_name (const char *filename)
-{
-  char *ret;
-
-  assert (backup_extension != NULL);
-
-  if (asprintf (&ret, "%s%s", filename, backup_extension) == -1)
{
-    perror ("asprintf");
-    exit (EXIT_FAILURE);
-  }
-
-  return ret; /* caller will free */
 }
-- 
1.9.3

Pino Toscano

2014-Aug-28 13:21 UTC

head link

[Libguestfs] [PATCH 12/13] fish: edit: add verbose parameter

---
 edit/edit.c      |  4 ++--
 fish/edit.c      |  2 +-
 fish/file-edit.c | 10 ++++++++--
 fish/file-edit.h |  5 +++--
 4 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/edit/edit.c b/edit/edit.c
index 70ee129..f1c3b91 100644
--- a/edit/edit.c
+++ b/edit/edit.c
@@ -332,7 +332,7 @@ edit (const char *filename, const char *root)
   }
 
   if (perl_expr != NULL) {
-    r = edit_file_perl (g, filename, perl_expr, backup_extension);
+    r = edit_file_perl (g, filename, perl_expr, backup_extension, verbose);
   } else {
     const char *editor;
 
@@ -340,7 +340,7 @@ edit (const char *filename, const char *root)
     if (editor == NULL)
       editor = "vi";
 
-    r = edit_file_editor (g, filename, editor, backup_extension);
+    r = edit_file_editor (g, filename, editor, backup_extension, verbose);
   }
 
   switch (r) {
diff --git a/fish/edit.c b/fish/edit.c
index f43ef3b..0f41a88 100644
--- a/fish/edit.c
+++ b/fish/edit.c
@@ -58,7 +58,7 @@ run_edit (const char *cmd, size_t argc, char *argv[])
   if (remotefilename == NULL)
     return -1;
 
-  r = edit_file_editor (g, remotefilename, editor, NULL);
+  r = edit_file_editor (g, remotefilename, editor, NULL, 0 /* not verbose */);
 
   return r == -1 ? -1 : 0;
 }
diff --git a/fish/file-edit.c b/fish/file-edit.c
index fa68626..ff36ac2 100644
--- a/fish/file-edit.c
+++ b/fish/file-edit.c
@@ -41,7 +41,7 @@ static char *generate_backup_name (const char *filename,
 
 int
 edit_file_editor (guestfs_h *g, const char *filename, const char *editor,
-                  const char *backup_extension)
+                  const char *backup_extension, int verbose)
 {
   CLEANUP_FREE char *tmpdir = guestfs_get_tmpdir (g);
   CLEANUP_UNLINK_FREE char *tmpfilename = NULL;
@@ -105,6 +105,9 @@ edit_file_editor (guestfs_h *g, const char *filename, const
char *editor,
     return -1;
   }
 
+  if (verbose)
+    fprintf (stderr, "%s\n", cmd);
+
   r = system (cmd);
   if (r == -1 || WEXITSTATUS (r) != 0) {
     perror (cmd);
@@ -161,7 +164,7 @@ edit_file_editor (guestfs_h *g, const char *filename, const
char *editor,
 
 int
 edit_file_perl (guestfs_h *g, const char *filename, const char *perl_expr,
-                const char *backup_extension)
+                const char *backup_extension, int verbose)
 {
   CLEANUP_FREE char *tmpdir = guestfs_get_tmpdir (g);
   CLEANUP_UNLINK_FREE char *tmpfilename = NULL;
@@ -223,6 +226,9 @@ edit_file_perl (guestfs_h *g, const char *filename, const
char *perl_expr,
     return -1;
   }
 
+  if (verbose)
+    fprintf (stderr, "%s\n", cmd);
+
   r = system (cmd);
   if (r == -1 || WEXITSTATUS (r) != 0)
     return -1;
diff --git a/fish/file-edit.h b/fish/file-edit.h
index 98fc453..3f8b95e 100644
--- a/fish/file-edit.h
+++ b/fish/file-edit.h
@@ -30,7 +30,8 @@
  * the file (e.g. the user closed the editor without saving).
  */
 extern int edit_file_editor (guestfs_h *g, const char *filename,
-                             const char *editor, const char *backup_extension);
+                             const char *editor, const char *backup_extension,
+                             int verbose);
 
 /**
  * Edit 'filename' running the specified 'perl_expr' using
Perl.
@@ -41,6 +42,6 @@ extern int edit_file_editor (guestfs_h *g, const char
*filename,
  */
 extern int edit_file_perl (guestfs_h *g, const char *filename,
                            const char *perl_expr,
-                           const char *backup_extension);
+                           const char *backup_extension, int verbose);
 
 #endif
-- 
1.9.3

Pino Toscano

2014-Aug-28 13:21 UTC

head link

[Libguestfs] [PATCH 13/13] customize: use the common perl file editing code

Wrap edit_file_perl to OCaml, and use it instead of the OCaml version
of it.
---
 builder/Makefile.am     |  2 ++
 customize/Makefile.am   |  5 +++-
 customize/perl_edit-c.c | 55 +++++++++++++++++++++++++++++++++++++++++++
 customize/perl_edit.ml  | 62 ++-----------------------------------------------
 po/POTFILES             |  1 +
 sysprep/Makefile.am     |  2 ++
 v2v/Makefile.am         |  2 ++
 7 files changed, 68 insertions(+), 61 deletions(-)
 create mode 100644 customize/perl_edit-c.c

diff --git a/builder/Makefile.am b/builder/Makefile.am
index 726ca60..0ca5db6 100644
--- a/builder/Makefile.am
+++ b/builder/Makefile.am
@@ -101,6 +101,7 @@ deps = \
 	$(top_builddir)/customize/hostname.cmx \
 	$(top_builddir)/customize/timezone.cmx \
 	$(top_builddir)/customize/firstboot.cmx \
+	$(top_builddir)/customize/perl_edit-c.o \
 	$(top_builddir)/customize/perl_edit.cmx \
 	$(top_builddir)/customize/crypt-c.o \
 	$(top_builddir)/customize/crypt.cmx \
@@ -108,6 +109,7 @@ deps = \
 	$(top_builddir)/customize/customize_cmdline.cmx \
 	$(top_builddir)/customize/customize_run.cmx \
 	$(top_builddir)/fish/guestfish-uri.o \
+	$(top_builddir)/fish/guestfish-file-edit.o \
 	index-scan.o \
 	index-struct.o \
 	index-parse.o \
diff --git a/customize/Makefile.am b/customize/Makefile.am
index 3c81f34..90234a0 100644
--- a/customize/Makefile.am
+++ b/customize/Makefile.am
@@ -49,6 +49,7 @@ SOURCES = \
 	customize_main.ml \
 	password.ml \
 	password.mli \
+	perl_edit-c.c \
 	perl_edit.ml \
 	perl_edit.mli \
 	random_seed.ml \
@@ -62,13 +63,15 @@ if HAVE_OCAML
 
 deps = \
 	$(top_builddir)/fish/guestfish-uri.o \
+	$(top_builddir)/fish/guestfish-file-edit.o \
 	$(top_builddir)/mllib/common_gettext.cmx \
 	$(top_builddir)/mllib/common_utils.cmx \
 	$(top_builddir)/mllib/config.cmx \
 	$(top_builddir)/mllib/regedit.cmx \
 	$(top_builddir)/mllib/uri-c.o \
 	$(top_builddir)/mllib/uRI.cmx \
-	crypt-c.o
+	crypt-c.o \
+	perl_edit-c.o
 
 if HAVE_OCAMLOPT
 OBJECTS = $(deps)
diff --git a/customize/perl_edit-c.c b/customize/perl_edit-c.c
new file mode 100644
index 0000000..92126f9
--- /dev/null
+++ b/customize/perl_edit-c.c
@@ -0,0 +1,55 @@
+/* virt-customize - interface to edit_file_perl
+ * Copyright (C) 2014 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
USA.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <caml/alloc.h>
+#include <caml/memory.h>
+#include <caml/mlvalues.h>
+
+#include "file-edit.h"
+
+/**
+ * We try to reuse the internals of the OCaml binding (for extracting
+ * the guestfs handle, and raising errors); hopefully this should be safe,
+ * as long as it's kept internal within the libguestfs sources.
+ */
+#include "../ocaml/guestfs-c.h"
+
+#pragma GCC diagnostic ignored "-Wmissing-prototypes"
+
+value
+virt_customize_edit_file_perl (value verbosev, value guestfsv, value filev,
+                               value exprv)
+{
+  CAMLparam4 (verbosev, guestfsv, filev, exprv);
+  int r;
+  guestfs_h *g;
+
+  g = Guestfs_val (guestfsv);
+  r = edit_file_perl (g, String_val (filev), String_val (exprv), NULL,
+                      Bool_val (verbosev));
+  if (r == -1)
+    ocaml_guestfs_raise_error (g, "edit_file_perl");
+
+  CAMLreturn (Val_unit);
+}
diff --git a/customize/perl_edit.ml b/customize/perl_edit.ml
index e44ff69..c734438 100644
--- a/customize/perl_edit.ml
+++ b/customize/perl_edit.ml
@@ -16,63 +16,5 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_gettext.Gettext
-open Common_utils
-
-open Printf
-
-(* Implement the --edit option.
- *
- * Code copied from virt-edit.
- *)
-let rec edit_file ~verbose (g : Guestfs.guestfs) file expr -  let file_old =
file ^ "~" in
-  g#rename file file_old;
-
-  (* Download the file to a temporary. *)
-  let tmpfile = Filename.temp_file "vbedit" "" in
-  unlink_on_exit tmpfile;
-  g#download file_old tmpfile;
-
-  do_perl_edit ~verbose g tmpfile expr;
-
-  (* Upload the file.  Unlike virt-edit we can afford to fail here
-   * so we don't need the temporary upload file.
-   *)
-  g#upload tmpfile file;
-
-  (* However like virt-edit we do need to copy attributes. *)
-  g#copy_attributes ~all:true file_old file;
-  g#rm file_old
-
-and do_perl_edit ~verbose g file expr -  (* Pass the expression to Perl via the
environment.  This sidesteps
-   * any quoting problems with the already complex Perl command line.
-   *)
-  Unix.putenv "virt_edit_expr" expr;
-
-  (* Call out to a canned Perl script. *)
-  let cmd = sprintf "\
-    perl -e '
-      $lineno = 0;
-      $expr = $ENV{virt_edit_expr};
-      while (<STDIN>) {
-        $lineno++;
-        eval $expr;
-        die if $@;
-        print STDOUT $_ or die \"print: $!\";
-      }
-      close STDOUT or die \"close: $!\";
-    ' < %s > %s.out" file file in
-
-  if verbose then
-    eprintf "%s\n%!" cmd;
-
-  let r = Sys.command cmd in
-  if r <> 0 then (
-    eprintf (f_"virt-builder: error: could not evaluate Perl expression
'%s'\n")
-      expr;
-    exit 1
-  );
-
-  Unix.rename (file ^ ".out") file
+external edit_file : verbose:bool -> Guestfs.guestfs -> string ->
string -> unit
+  = "virt_customize_edit_file_perl"
diff --git a/po/POTFILES b/po/POTFILES
index a31cc88..59233c9 100644
--- a/po/POTFILES
+++ b/po/POTFILES
@@ -13,6 +13,7 @@ cat/log.c
 cat/ls.c
 cat/visit.c
 customize/crypt-c.c
+customize/perl_edit-c.c
 daemon/9p.c
 daemon/acl.c
 daemon/augeas.c
diff --git a/sysprep/Makefile.am b/sysprep/Makefile.am
index 97166b5..7b88ef5 100644
--- a/sysprep/Makefile.am
+++ b/sysprep/Makefile.am
@@ -97,10 +97,12 @@ deps = \
 	$(top_builddir)/customize/hostname.cmx \
 	$(top_builddir)/customize/timezone.cmx \
 	$(top_builddir)/customize/firstboot.cmx \
+	$(top_builddir)/customize/perl_edit-c.o \
 	$(top_builddir)/customize/perl_edit.cmx \
 	$(top_builddir)/customize/customize_cmdline.cmx \
 	$(top_builddir)/customize/customize_run.cmx \
 	$(top_builddir)/fish/guestfish-uri.o \
+	$(top_builddir)/fish/guestfish-file-edit.o \
 	sysprep_operation.cmx \
 	$(patsubst %,sysprep_operation_%.cmx,$(operations)) \
 	main.cmx
diff --git a/v2v/Makefile.am b/v2v/Makefile.am
index e3a000a..f4baf65 100644
--- a/v2v/Makefile.am
+++ b/v2v/Makefile.am
@@ -64,10 +64,12 @@ SOURCES_ML = \
 
 SOURCES_C = \
 	$(top_builddir)/fish/progress.c \
+	$(top_builddir)/fish/file-edit.c \
 	$(top_builddir)/mllib/tty-c.c \
 	$(top_builddir)/mllib/progress-c.c \
 	$(top_builddir)/mllib/mkdtemp-c.c \
 	$(top_builddir)/customize/crypt-c.c \
+	$(top_builddir)/customize/perl_edit-c.c \
 	utils-c.c \
 	xml-c.c \
 	domainxml-c.c
-- 
1.9.3

Richard W.M. Jones

2014-Aug-28 18:36 UTC

head link

Re: [Libguestfs] [PATCH 06/13] fish: edit: improve the editor execution

On Thu, Aug 28, 2014 at 03:21:09PM +0200, Pino Toscano
wrote:>    /* Edit it. */
> -  /* XXX Safe? */
> -  snprintf (buf, sizeof buf, "%s %s", editor, filename);
> +  if (asprintf (&cmd, "%s %s", editor, tmpfilename) == -1) {
filename -> tmpfilename.  Is that right?

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-top is 'top' for virtual machines.  Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.
http://people.redhat.com/~rjones/virt-top

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Libguestfs - Aug 2014 - Re: [PATCH 06/13] fish: edit: improve the editor execution

[Libguestfs] [PATCH 00/13] code refactorings for tools

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[Libguestfs] [PATCH 02/13] fish, edit: specifies whether mount Windows as readonly

[Libguestfs] [PATCH 03/13] fish, edit: move the exit-on-case-sensitive-error behaviour to virt-edit

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[Libguestfs] [PATCH 05/13] fish: isolate file editing (w/ editor) code in own file

[Libguestfs] [PATCH 06/13] fish: edit: improve the editor execution

[Libguestfs] [PATCH 07/13] fish: edit: bring backup extension to file editing w/ editor

[Libguestfs] [PATCH 08/13] fish: edit: return 1 for unchanged file

[Libguestfs] [PATCH 09/13] fish: edit: bring the fast-time-edit protection

[Libguestfs] [PATCH 10/13] fish: edit: add perl file editing

[Libguestfs] [PATCH 11/13] edit: switch to common editing functions

[Libguestfs] [PATCH 12/13] fish: edit: add verbose parameter

[Libguestfs] [PATCH 13/13] customize: use the common perl file editing code

Re: [Libguestfs] [PATCH 06/13] fish: edit: improve the editor execution

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