klibc - Jan 2019 - [klibc:update-dash] jobs: Handle string-based job descriptors

Commit-ID:  f97573c5c1a47595c5a059b84b74f54cb2cd8d6d
Gitweb:    
http://git.kernel.org/?p=libs/klibc/klibc.git;a=commit;h=f97573c5c1a47595c5a059b84b74f54cb2cd8d6d
Author:     Stephen Kitt <steve at sk2.org>
AuthorDate: Mon, 6 Jun 2016 22:45:27 +0800
Committer:  Ben Hutchings <ben at decadent.org.uk>
CommitDate: Fri, 25 Jan 2019 02:57:21 +0000

[klibc] jobs: Handle string-based job descriptors

When looking for a job using a string descriptor, e.g.

	fg %man

the relevant loop in src/jobs.c only ever exits to the err label. With
this patch, when the end condition is reached, we check whether a job
was found, and if so, set things up to exit correctly via gotit.
Multiple matches are already caught using the test in the match block.

Signed-off-by: Stephen Kitt <steve at sk2.org>
Signed-off-by: Herbert Xu <herbert at gondor.apana.org.au>
Signed-off-by: Ben Hutchings <ben at decadent.org.uk>

---
 usr/dash/jobs.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/usr/dash/jobs.c b/usr/dash/jobs.c
index 7c324b76..5e080f6a 100644
--- a/usr/dash/jobs.c
+++ b/usr/dash/jobs.c
@@ -713,9 +713,7 @@ check:
 	}
 
 	found = 0;
-	while (1) {
-		if (!jp)
-			goto err;
+	while (jp) {
 		if (match(jp->ps[0].cmd, p)) {
 			if (found)
 				goto err;
@@ -725,6 +723,10 @@ check:
 		jp = jp->prev_job;
 	}
 
+	if (!found)
+		goto err;
+	jp = found;
+
 gotit:
 #if JOBS
 	err_msg = "job %s not created under job control";