[git commit] ash: a bunch of trivial simplifications
Denys Vlasenko
vda.linux at googlemail.com
Wed Oct 7 13:44:36 UTC 2015
commit: http://git.busybox.net/busybox/commit/?id=9c5410023a9d1920c336ed4d9ceaad586ce43328
branch: http://git.busybox.net/busybox/commit/?id=refs/heads/master
Also, in a few places made code more reliable wrt large sizeof(int)
and sizeof(arith_t)..
function old new delta
sprint_status48 - 143 +143
newline_and_flush - 56 +56
showjob 365 382 +17
parse_command 1440 1443 +3
cmdputs 334 332 -2
cmdloop 434 429 -5
showjobs 70 64 -6
fg_bgcmd 296 290 -6
ash_vmsg 159 153 -6
ash_main 1487 1481 -6
jobscmd 94 82 -12
getoptscmd 687 632 -55
outcslow 56 - -56
sprint_status 156 - -156
------------------------------------------------------------------------------
(add/remove: 2/2 grow/shrink: 2/8 up/down: 219/-310) Total: -91 bytes
Signed-off-by: Denys Vlasenko <vda.linux at googlemail.com>
---
shell/ash.c | 72 ++++++++++++++++++++++++++++++----------------------------
1 files changed, 37 insertions(+), 35 deletions(-)
diff --git a/shell/ash.c b/shell/ash.c
index 42c9125..b34dcc1 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -537,11 +537,12 @@ flush_stdout_stderr(void)
INT_ON;
}
+/* Was called outcslow(c,FILE*), but c was always '\n' */
static void
-outcslow(int c, FILE *dest)
+newline_and_flush(FILE *dest)
{
INT_OFF;
- putc(c, dest);
+ putc('\n', dest);
fflush(dest);
INT_ON;
}
@@ -1202,7 +1203,7 @@ ash_vmsg(const char *msg, va_list ap)
fprintf(stderr, "line %d: ", startlinno);
}
vfprintf(stderr, msg, ap);
- outcslow('\n', stderr);
+ newline_and_flush(stderr);
}
/*
@@ -3336,6 +3337,7 @@ unaliascmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
#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 */
+#define SHOW_STDERR 0x08 /* print to stderr (else stdout) */
/*
* A job structure contains information about a job. A job is either a
@@ -3850,7 +3852,7 @@ showpipe(struct job *jp /*, FILE *out*/)
psend = jp->ps + jp->nprocs;
for (ps = jp->ps + 1; ps < psend; ps++)
printf(" | %s", ps->ps_cmd);
- outcslow('\n', stdout);
+ newline_and_flush(stdout);
flush_stdout_stderr();
}
@@ -3910,7 +3912,7 @@ fg_bgcmd(int argc UNUSED_PARAM, char **argv)
#endif
static int
-sprint_status(char *s, int status, int sigonly)
+sprint_status48(char *s, int status, int sigonly)
{
int col;
int st;
@@ -3935,14 +3937,12 @@ sprint_status(char *s, int status, int sigonly)
//TODO: use bbox's get_signame? strsignal adds ~600 bytes to text+rodata
col = fmtstr(s, 32, strsignal(st));
if (WCOREDUMP(status)) {
- col += fmtstr(s + col, 16, " (core dumped)");
+ strcpy(s + col, " (core dumped)");
+ col += sizeof(" (core dumped)")-1;
}
} else if (!sigonly) {
st = WEXITSTATUS(status);
- if (st)
- col = fmtstr(s, 16, "Done(%d)", st);
- else
- col = fmtstr(s, 16, "Done");
+ col = fmtstr(s, 16, (st ? "Done(%d)" : "Done"), st);
}
out:
return col;
@@ -4031,7 +4031,7 @@ dowait(int wait_flags, struct job *job)
char s[48 + 1];
int len;
- len = sprint_status(s, status, 1);
+ len = sprint_status48(s, status, 1);
if (len) {
s[len] = '\n';
s[len + 1] = '\0';
@@ -4052,13 +4052,14 @@ blocking_wait_with_raise_on_sig(void)
#if JOBS
static void
-showjob(FILE *out, struct job *jp, int mode)
+showjob(struct job *jp, int mode)
{
struct procstat *ps;
struct procstat *psend;
int col;
int indent_col;
- char s[80];
+ char s[16 + 16 + 48];
+ FILE *out = (mode & SHOW_STDERR ? stderr : stdout);
ps = jp->ps;
@@ -4088,7 +4089,7 @@ showjob(FILE *out, struct job *jp, int mode)
int status = psend[-1].ps_status;
if (jp->state == JOBSTOPPED)
status = jp->stopstatus;
- col += sprint_status(s + col, status, 0);
+ col += sprint_status48(s + col, status, 0);
}
/* By now, "[JOBID]* [maybe PID] STATUS" is printed */
@@ -4115,7 +4116,7 @@ showjob(FILE *out, struct job *jp, int mode)
ps->ps_cmd
);
} while (++ps != psend);
- outcslow('\n', out);
+ newline_and_flush(out);
jp->changed = 0;
@@ -4130,7 +4131,7 @@ showjob(FILE *out, struct job *jp, int mode)
* statuses have changed since the last call to showjobs.
*/
static void
-showjobs(FILE *out, int mode)
+showjobs(int mode)
{
struct job *jp;
@@ -4142,7 +4143,7 @@ showjobs(FILE *out, int mode)
for (jp = curjob; jp; jp = jp->prev_job) {
if (!(mode & SHOW_CHANGED) || jp->changed) {
- showjob(out, jp, mode);
+ showjob(jp, mode);
}
}
}
@@ -4163,10 +4164,10 @@ jobscmd(int argc UNUSED_PARAM, char **argv)
argv = argptr;
if (*argv) {
do
- showjob(stdout, getjob(*argv, 0), mode);
+ showjob(getjob(*argv, 0), mode);
while (*++argv);
} else {
- showjobs(stdout, mode);
+ showjobs(mode);
}
return 0;
@@ -5572,8 +5573,8 @@ cvtnum(arith_t num)
{
int len;
- expdest = makestrspace(32, expdest);
- len = fmtstr(expdest, 32, ARITH_FMT, num);
+ expdest = makestrspace(sizeof(arith_t)*3 + 2, expdest);
+ len = fmtstr(expdest, sizeof(arith_t)*3 + 2, ARITH_FMT, num);
STADJUST(len, expdest);
return len;
}
@@ -10352,9 +10353,11 @@ getopts(char *optstr, char *optvar, char **optfirst, int *param_optind, int *opt
char c = '?';
int done = 0;
int err = 0;
- char s[12];
+ char sbuf[2];
char **optnext;
+ sbuf[1] = '\0';
+
if (*param_optind < 1)
return 1;
optnext = optfirst + *param_optind - 1;
@@ -10381,9 +10384,9 @@ getopts(char *optstr, char *optvar, char **optfirst, int *param_optind, int *opt
for (q = optstr; *q != c;) {
if (*q == '\0') {
if (optstr[0] == ':') {
- s[0] = c;
- s[1] = '\0';
- err |= setvarsafe("OPTARG", s, 0);
+ sbuf[0] = c;
+ /*sbuf[1] = '\0'; - already is */
+ err |= setvarsafe("OPTARG", sbuf, 0);
} else {
fprintf(stderr, "Illegal option -%c\n", c);
unsetvar("OPTARG");
@@ -10398,9 +10401,9 @@ getopts(char *optstr, char *optvar, char **optfirst, int *param_optind, int *opt
if (*++q == ':') {
if (*p == '\0' && (p = *optnext) == NULL) {
if (optstr[0] == ':') {
- s[0] = c;
- s[1] = '\0';
- err |= setvarsafe("OPTARG", s, 0);
+ sbuf[0] = c;
+ /*sbuf[1] = '\0'; - already is */
+ err |= setvarsafe("OPTARG", sbuf, 0);
c = ':';
} else {
fprintf(stderr, "No arg for -%c option\n", c);
@@ -10419,11 +10422,10 @@ getopts(char *optstr, char *optvar, char **optfirst, int *param_optind, int *opt
out:
*optoff = p ? p - *(optnext - 1) : -1;
*param_optind = optnext - optfirst + 1;
- fmtstr(s, sizeof(s), "%d", *param_optind);
- err |= setvarsafe("OPTIND", s, VNOFUNC);
- s[0] = c;
- s[1] = '\0';
- err |= setvarsafe(optvar, s, 0);
+ err |= setvarsafe("OPTIND", itoa(*param_optind), VNOFUNC);
+ sbuf[0] = c;
+ /*sbuf[1] = '\0'; - already is */
+ err |= setvarsafe(optvar, sbuf, 0);
if (err) {
*param_optind = 1;
*optoff = -1;
@@ -12119,7 +12121,7 @@ cmdloop(int top)
setstackmark(&smark);
#if JOBS
if (doing_jobctl)
- showjobs(stderr, SHOW_CHANGED);
+ showjobs(SHOW_CHANGED|SHOW_STDERR);
#endif
inter = 0;
if (iflag && top) {
@@ -13143,7 +13145,7 @@ int ash_main(int argc UNUSED_PARAM, char **argv)
exitshell();
}
if (e == EXINT) {
- outcslow('\n', stderr);
+ newline_and_flush(stderr);
}
popstackmark(&smark);
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