search for: proc_fd_prefix

This is needed as the basis for the readlink -f option. Signed-off-by: Ben Hutchings <ben at decadent.org.uk> --- --- a/usr/include/stdlib.h +++ b/usr/include/stdlib.h @@ -92,4 +92,6 @@ static __inline__ int grantpt(int __fd) return 0; /* devpts does this all for us! */ } +__extern char *realpath(const char *, char *); + #endif /* _STDLIB_H */ --- a/usr/klibc/Kbuild +++

...that this requires name to refer to an existing file. This is + * correct according to POSIX. However, BSD and GNU implementations + * also allow name to refer to a non-existing file in an existing + * directory. + */ + +char *realpath(const char *name, char *resolved_name) +{ + static const char proc_fd_prefix[] = "/proc/self/fd/"; + char proc_fd_name[sizeof(proc_fd_prefix) + sizeof(int) * 3]; + int allocated = 0; + int fd; + ssize_t len; + + /* Open for path lookup only */ + fd = open(name, O_PATH); + if (fd < 0) + return NULL; + + if (!resolved_name) { + resolved_name = malloc(PATH_MAX);...

...that this requires name to refer to an existing file. This is + * correct according to POSIX. However, BSD and GNU implementations + * also allow name to refer to a non-existing file in an existing + * directory. + */ + +char *realpath(const char *name, char *resolved_name) +{ + static const char proc_fd_prefix[] = "/proc/self/fd/"; + char proc_fd_name[sizeof(proc_fd_prefix) + sizeof(int) * 3]; + int allocated = 0; + int fd; + ssize_t len; + + /* Open for path lookup only */ + fd = open(name, O_PATH); + if (fd < 0) + return NULL; + + if (!resolved_name) { + resolved_name = malloc(PATH_MAX);...

initramfs-tools version 0.117 requires 'readlink -f' and 'mount -o defaults' to work. The first two patches were previously submitted but not applied. Ben. Ben Hutchings (3): Implement realpath() readlink: Add -f option mount: Implement -o defaults usr/include/stdlib.h | 2 ++ usr/klibc/Kbuild | 2 +- usr/klibc/realpath.c | 49