[PATCH] Fix jobs -p to be POSIX compliant

[Wesley Schwengle <wesleys@xxxxxxxxxxxxxxx>]

In Debian the following bug was reported:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=346162

POSIX says that with "jobs -p", only the PID is output, whereas zsh
outputs full information.

There is discussion in the bug regarding POSIX_BUILTINS and refers to
workers/21366. The latter is interesting because it refers to setopt long_list_jobs.
I would want to argue that jobs -p should only show the PID regardless
of that setting and POSIX_BUILTINS. jobs has the -l option, where the
full line is displayed.

These patch makes the jobs -p POSIX compliant

Signed-off-by: Wesley Schwengle <wesleys@xxxxxxxxxxxxxxx>
---
 Src/jobs.c        | 18 ++++++++----------
 Test/W02jobs.ztst |  2 +-
 2 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/Src/jobs.c b/Src/jobs.c
index 118c5e61b..50f4fa3cf 100644
--- a/Src/jobs.c
+++ b/Src/jobs.c
@@ -1209,6 +1209,13 @@ printjob(Job jn, int lng, int synch)
 	    putc('\n', fout);
 	}
 	for (pn = jn->procs; pn;) {
+	    if (lng & 2) {
+		pid_t x = jn->gleader;
+		fprintf(fout, "%ld", (long) x);
+		putc('\n', fout);
+		doneprint = 1;
+		break;
+	    }
 	    len2 = (thisfmt ? 5 : 10) + len;	/* 2 spaces */
 	    if (lng & 3)
 		qn = pn->next;
@@ -1235,16 +1242,7 @@ printjob(Job jn, int lng, int synch)
 		    fprintf(fout, "zsh: ");
 		if (lng & 1)
 		    fprintf(fout, "%ld ", (long) pn->pid);
-		else if (lng & 2) {
-		    pid_t x = jn->gleader;
-
-		    fprintf(fout, "%ld ", (long) x);
-		    do
-			skip++;
-		    while ((x /= 10));
-		    skip++;
-		    lng &= ~3;
-		} else
+		else
 		    fprintf(fout, "%*s", skip, "");
 		if (pn->status == SP_RUNNING) {
 		    if (!conted)
diff --git a/Test/W02jobs.ztst b/Test/W02jobs.ztst
index d52888dd9..11bbdbf43 100644
--- a/Test/W02jobs.ztst
+++ b/Test/W02jobs.ztst
@@ -128,7 +128,7 @@
 0:`jobs -l` and `jobs -p` with running job
 *>\[1] [0-9]##
 *>\[1]  + [0-9]## running*sleep*
-*>\[1]  + [0-9]## running*sleep*
+*>[0-9]##
 *>zsh:*SIGHUPed*
 
   zpty_start
-- 
2.42.0.1140.gf01f4dc781