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authorDenys Vlasenko <vda.linux@googlemail.com>2009-12-04 22:02:27 (GMT)
committer Denys Vlasenko <vda.linux@googlemail.com>2009-12-04 22:02:27 (GMT)
commit285ad155c4769e4a37a936826ba41e402f7d863b (patch)
tree71cd00cf6fe40faf5a0405cfdaace39367c5e975
parent7a7b034482b1ecf4f9924160757339958f1f95d1 (diff)
downloadbusybox-285ad155c4769e4a37a936826ba41e402f7d863b.tar.gz
busybox-285ad155c4769e4a37a936826ba41e402f7d863b.tar.bz2
ash: preparatory work for pipefail and code shrink. -44 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--shell/ash.c129
1 files changed, 65 insertions, 64 deletions
diff --git a/shell/ash.c b/shell/ash.c
index 5d0fc6d..65d41cc 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -100,15 +100,15 @@ static const char *const optletters_optnames[] = {
"a" "allexport",
"b" "notify",
"u" "nounset",
- "\0" "vi"
+ "\0" "vi",
#if DEBUG
,"\0" "nolog"
,"\0" "debug"
#endif
};
-#define optletters(n) optletters_optnames[(n)][0]
-#define optnames(n) (&optletters_optnames[(n)][1])
+#define optletters(n) optletters_optnames[n][0]
+#define optnames(n) (optletters_optnames[n] + 1)
enum { NOPTS = ARRAY_SIZE(optletters_optnames) };
@@ -3194,8 +3194,8 @@ unaliascmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
/* ============ jobs.c */
/* Mode argument to forkshell. Don't change FORK_FG or FORK_BG. */
-#define FORK_FG 0
-#define FORK_BG 1
+#define FORK_FG 0
+#define FORK_BG 1
#define FORK_NOJOB 2
/* mode flags for showjob(s) */
@@ -3210,9 +3210,9 @@ unaliascmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
* array of pids.
*/
struct procstat {
- pid_t pid; /* process id */
- int status; /* last process status from wait() */
- char *cmd; /* text of command being run */
+ pid_t ps_pid; /* process id */
+ int ps_status; /* last process status from wait() */
+ char *ps_cmd; /* text of command being run */
};
struct job {
@@ -3518,7 +3518,7 @@ getjob(const char *name, int getctl)
found = NULL;
while (jp) {
- if (match(jp->ps[0].cmd, p)) {
+ if (match(jp->ps[0].ps_cmd, p)) {
if (found)
goto err;
found = jp;
@@ -3552,8 +3552,8 @@ freejob(struct job *jp)
INT_OFF;
for (i = jp->nprocs, ps = jp->ps; --i >= 0; ps++) {
- if (ps->cmd != nullstr)
- free(ps->cmd);
+ if (ps->ps_cmd != nullstr)
+ free(ps->ps_cmd);
}
if (jp->ps != &jp->ps0)
free(jp->ps);
@@ -3655,7 +3655,7 @@ killcmd(int argc, char **argv)
do {
if (argv[i][0] == '%') {
struct job *jp = getjob(argv[i], 0);
- unsigned pid = jp->ps[0].pid;
+ unsigned pid = jp->ps[0].ps_pid;
/* Enough space for ' -NNN<nul>' */
argv[i] = alloca(sizeof(int)*3 + 3);
/* kill_main has matching code to expect
@@ -3669,15 +3669,15 @@ killcmd(int argc, char **argv)
}
static void
-showpipe(struct job *jp, FILE *out)
+showpipe(struct job *jp /*, FILE *out*/)
{
- struct procstat *sp;
- struct procstat *spend;
+ struct procstat *ps;
+ struct procstat *psend;
- spend = jp->ps + jp->nprocs;
- for (sp = jp->ps + 1; sp < spend; sp++)
- fprintf(out, " | %s", sp->cmd);
- outcslow('\n', out);
+ psend = jp->ps + jp->nprocs;
+ for (ps = jp->ps + 1; ps < psend; ps++)
+ printf(" | %s", ps->ps_cmd);
+ outcslow('\n', stdout);
flush_stdout_stderr();
}
@@ -3694,15 +3694,15 @@ restartjob(struct job *jp, int mode)
if (jp->state == JOBDONE)
goto out;
jp->state = JOBRUNNING;
- pgid = jp->ps->pid;
+ pgid = jp->ps[0].ps_pid;
if (mode == FORK_FG)
xtcsetpgrp(ttyfd, pgid);
killpg(pgid, SIGCONT);
ps = jp->ps;
i = jp->nprocs;
do {
- if (WIFSTOPPED(ps->status)) {
- ps->status = -1;
+ if (WIFSTOPPED(ps->ps_status)) {
+ ps->ps_status = -1;
}
ps++;
} while (--i);
@@ -3716,22 +3716,20 @@ static int FAST_FUNC
fg_bgcmd(int argc UNUSED_PARAM, char **argv)
{
struct job *jp;
- FILE *out;
int mode;
int retval;
mode = (**argv == 'f') ? FORK_FG : FORK_BG;
nextopt(nullstr);
argv = argptr;
- out = stdout;
do {
jp = getjob(*argv, 1);
if (mode == FORK_BG) {
set_curjob(jp, CUR_RUNNING);
- fprintf(out, "[%d] ", jobno(jp));
+ printf("[%d] ", jobno(jp));
}
- outstr(jp->ps->cmd, out);
- showpipe(jp, out);
+ out1str(jp->ps[0].ps_cmd);
+ showpipe(jp /*, stdout*/);
retval = restartjob(jp, mode);
} while (*argv && *++argv);
return retval;
@@ -3790,8 +3788,9 @@ dowait(int wait_flags, struct job *job)
/* Do a wait system call. If job control is compiled in, we accept
* stopped processes. wait_flags may have WNOHANG, preventing blocking.
* NB: _not_ safe_waitpid, we need to detect EINTR */
- pid = waitpid(-1, &status,
- (doing_jobctl ? (wait_flags | WUNTRACED) : wait_flags));
+ if (doing_jobctl)
+ wait_flags |= WUNTRACED;
+ pid = waitpid(-1, &status, wait_flags);
TRACE(("wait returns pid=%d, status=0x%x, errno=%d(%s)\n",
pid, status, errno, strerror(errno)));
if (pid <= 0)
@@ -3800,32 +3799,32 @@ dowait(int wait_flags, struct job *job)
INT_OFF;
thisjob = NULL;
for (jp = curjob; jp; jp = jp->prev_job) {
- struct procstat *sp;
- struct procstat *spend;
+ struct procstat *ps;
+ struct procstat *psend;
if (jp->state == JOBDONE)
continue;
state = JOBDONE;
- spend = jp->ps + jp->nprocs;
- sp = jp->ps;
+ ps = jp->ps;
+ psend = ps + jp->nprocs;
do {
- if (sp->pid == pid) {
+ if (ps->ps_pid == pid) {
TRACE(("Job %d: changing status of proc %d "
"from 0x%x to 0x%x\n",
- jobno(jp), pid, sp->status, status));
- sp->status = status;
+ jobno(jp), pid, ps->ps_status, status));
+ ps->ps_status = status;
thisjob = jp;
}
- if (sp->status == -1)
+ if (ps->ps_status == -1)
state = JOBRUNNING;
#if JOBS
if (state == JOBRUNNING)
continue;
- if (WIFSTOPPED(sp->status)) {
- jp->stopstatus = sp->status;
+ if (WIFSTOPPED(ps->ps_status)) {
+ jp->stopstatus = ps->ps_status;
state = JOBSTOPPED;
}
#endif
- } while (++sp < spend);
+ } while (++ps < psend);
if (thisjob)
goto gotjob;
}
@@ -3891,7 +3890,7 @@ showjob(FILE *out, struct job *jp, int mode)
if (mode & SHOW_ONLY_PGID) { /* jobs -p */
/* just output process (group) id of pipeline */
- fprintf(out, "%d\n", ps->pid);
+ fprintf(out, "%d\n", ps->ps_pid);
return;
}
@@ -3904,7 +3903,7 @@ showjob(FILE *out, struct job *jp, int mode)
s[col - 3] = '-';
if (mode & SHOW_PIDS)
- col += fmtstr(s + col, 16, "%d ", ps->pid);
+ col += fmtstr(s + col, 16, "%d ", ps->ps_pid);
psend = ps + jp->nprocs;
@@ -3912,7 +3911,7 @@ showjob(FILE *out, struct job *jp, int mode)
strcpy(s + col, "Running");
col += sizeof("Running") - 1;
} else {
- int status = psend[-1].status;
+ int status = psend[-1].ps_status;
if (jp->state == JOBSTOPPED)
status = jp->stopstatus;
col += sprint_status(s + col, status, 0);
@@ -3928,20 +3927,20 @@ showjob(FILE *out, struct job *jp, int mode)
* making it impossible to know 1st process status.
*/
goto start;
- while (1) {
+ do {
/* for each process */
s[0] = '\0';
col = 33;
if (mode & SHOW_PIDS)
- col = fmtstr(s, 48, "\n%*c%d ", indent_col, ' ', ps->pid) - 1;
+ col = fmtstr(s, 48, "\n%*c%d ", indent_col, ' ', ps->ps_pid) - 1;
start:
- 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;
- }
+ fprintf(out, "%s%*c%s%s",
+ s,
+ 33 - col >= 0 ? 33 - col : 0, ' ',
+ ps == jp->ps ? "" : "| ",
+ ps->ps_cmd
+ );
+ } while (++ps != psend);
outcslow('\n', out);
jp->changed = 0;
@@ -3992,8 +3991,9 @@ jobscmd(int argc UNUSED_PARAM, char **argv)
do
showjob(stdout, getjob(*argv, 0), mode);
while (*++argv);
- } else
+ } else {
showjobs(stdout, mode);
+ }
return 0;
}
@@ -4005,7 +4005,7 @@ getstatus(struct job *job)
int status;
int retval;
- status = job->ps[job->nprocs - 1].status;
+ status = job->ps[job->nprocs - 1].ps_status;
retval = WEXITSTATUS(status);
if (!WIFEXITED(status)) {
#if JOBS
@@ -4072,7 +4072,7 @@ waitcmd(int argc UNUSED_PARAM, char **argv)
while (1) {
if (!job)
goto repeat;
- if (job->ps[job->nprocs - 1].pid == pid)
+ if (job->ps[job->nprocs - 1].ps_pid == pid)
break;
job = job->prev_job;
}
@@ -4576,7 +4576,7 @@ forkchild(struct job *jp, union node *n, int mode)
if (jp->nprocs == 0)
pgrp = getpid();
else
- pgrp = jp->ps[0].pid;
+ pgrp = jp->ps[0].ps_pid;
/* this can fail because we are doing it in the parent also */
setpgid(0, pgrp);
if (mode == FORK_FG)
@@ -4648,7 +4648,7 @@ forkparent(struct job *jp, union node *n, int mode, pid_t pid)
if (jp->nprocs == 0)
pgrp = pid;
else
- pgrp = jp->ps[0].pid;
+ pgrp = jp->ps[0].ps_pid;
/* This can fail because we are doing it in the child also */
setpgid(pid, pgrp);
}
@@ -4659,12 +4659,12 @@ forkparent(struct job *jp, union node *n, int mode, pid_t pid)
}
if (jp) {
struct procstat *ps = &jp->ps[jp->nprocs++];
- ps->pid = pid;
- ps->status = -1;
- ps->cmd = nullstr;
+ ps->ps_pid = pid;
+ ps->ps_status = -1;
+ ps->ps_cmd = nullstr;
#if JOBS
if (doing_jobctl && n)
- ps->cmd = commandtext(n);
+ ps->ps_cmd = commandtext(n);
#endif
}
}
@@ -7683,7 +7683,7 @@ describe_command(char *command, int describe_command_verbose)
return 127;
}
out:
- outstr("\n", stdout);
+ out1str("\n");
return 0;
}
@@ -11852,8 +11852,9 @@ evalcmd(int argc UNUSED_PARAM, char **argv)
}
/*
- * Read and execute commands. "Top" is nonzero for the top level command
- * loop; it turns on prompting if the shell is interactive.
+ * Read and execute commands.
+ * "Top" is nonzero for the top level command loop;
+ * it turns on prompting if the shell is interactive.
*/
static int
cmdloop(int top)