ash: make "jobs -l" more similar to bash. By Earl Chew. Fixes bug 481

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/shell/ash.c b/shell/ash.c
index 077f5e5fc0e82daade0581c0b034d72e386dd88a..1ec6c96c331a3ca227a7ebce5071c355f236a6f8 100644 (file)
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -3240,9 +3240,9 @@ unaliascmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
 #define FORK_NOJOB 2
 
 /* mode flags for showjob(s) */
-#define SHOW_PGID       0x01    /* only show pgid - for jobs -p */
-#define SHOW_PID        0x04    /* include process pid */
-#define SHOW_CHANGED    0x08    /* only jobs whose state has changed */
+#define SHOW_ONLY_PGID  0x01    /* show only pgid (jobs -p) */
+#define SHOW_PIDS       0x02    /* show individual pids, not just one line per job */
+#define SHOW_CHANGED    0x04    /* only jobs whose state has changed */
 
 /*
  * A job structure contains information about a job.  A job is either a
@@ -3250,7 +3250,6 @@ unaliascmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
  * latter case, pidlist will be non-NULL, and will point to a -1 terminated
  * array of pids.
  */
-
 struct procstat {
        pid_t   pid;            /* process id */
        int     status;         /* last process status from wait() */
@@ -3935,7 +3934,7 @@ showjob(FILE *out, struct job *jp, int mode)
 
        ps = jp->ps;
 
-       if (mode & SHOW_PGID) {
+       if (mode & SHOW_ONLY_PGID) { /* jobs -p */
                /* just output process (group) id of pipeline */
                fprintf(out, "%d\n", ps->pid);
                return;
@@ -3945,11 +3944,11 @@ showjob(FILE *out, struct job *jp, int mode)
        indent_col = col;
 
        if (jp == curjob)
-               s[col - 2] = '+';
+               s[col - 3] = '+';
        else if (curjob && jp == curjob->prev_job)
-               s[col - 2] = '-';
+               s[col - 3] = '-';
 
-       if (mode & SHOW_PID)
+       if (mode & SHOW_PIDS)
                col += fmtstr(s + col, 16, "%d ", ps->pid);
 
        psend = ps + jp->nprocs;
@@ -3963,25 +3962,32 @@ showjob(FILE *out, struct job *jp, int mode)
                        status = jp->stopstatus;
                col += sprint_status(s + col, status, 0);
        }
+       /* By now, "[JOBID]*  [maybe PID] STATUS" is printed */
 
+       /* This loop either prints "<cmd1> | <cmd2> | <cmd3>" line
+        * or prints several "PID             | <cmdN>" lines,
+        * depending on SHOW_PIDS bit.
+        * We do not print status of individual processes
+        * between PID and <cmdN>. bash does it, but not very well:
+        * first line shows overall job status, not process status,
+        * making it impossible to know 1st process status.
+        */
        goto start;
-
-       do {
+       while (1) {
                /* for each process */
-               col = fmtstr(s, 48, " |\n%*c%d ", indent_col, ' ', ps->pid) - 3;
+               s[0] = '\0';
+               col = 33;
+               if (mode & SHOW_PIDS)
+                       col = fmtstr(s, 48, "\n%*c%d ", indent_col, ' ', ps->pid) - 1;
  start:
-               fprintf(out, "%s%*c%s",
-                       s, 33 - col >= 0 ? 33 - col : 0, ' ', ps->cmd
-               );
-               if (!(mode & SHOW_PID)) {
-                       showpipe(jp, out);
+               fprintf(out, "%s%*c", s, 33 - col >= 0 ? 33 - col : 0, ' ');
+               if (ps != jp->ps)
+                       fprintf(out, "| ");
+               fprintf(out, "%s", ps->cmd);
+               if (++ps == psend)
                        break;
-               }
-               if (++ps == psend) {
-                       outcslow('\n', out);
-                       break;
-               }
-       } while (1);
+       }
+       outcslow('\n', out);
 
        jp->changed = 0;
 
@@ -4021,15 +4027,15 @@ jobscmd(int argc UNUSED_PARAM, char **argv)
        mode = 0;
        while ((m = nextopt("lp"))) {
                if (m == 'l')
-                       mode = SHOW_PID;
+                       mode |= SHOW_PIDS;
                else
-                       mode = SHOW_PGID;
+                       mode |= SHOW_ONLY_PGID;
        }
 
        argv = argptr;
        if (*argv) {
                do
-                       showjob(stdout, getjob(*argv,0), mode);
+                       showjob(stdout, getjob(*argv, 0), mode);
                while (*++argv);
        } else
                showjobs(stdout, mode);