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taskset: use iterate_on_dir()

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function                                             old     new   delta
iter                                                   -      27     +27
process_pid_str                                      854     856      +2
taskset_main                                         181     135     -46
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/1 up/down: 29/-46)            Total: -17 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2021-06-24 12:02:17 +02:00
parent 1746218bee
commit 6d61eb1363
1 changed files with 17 additions and 18 deletions
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35
util-linux/taskset.c
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@@ -213,7 +213,7 @@ enum {
OPT_c = (1 << 2) * ENABLE_FEATURE_TASKSET_CPULIST,
};
static void process_pid_str(const char *pid_str, unsigned opts, char *aff)
static int process_pid_str(const char *pid_str, unsigned opts, char *aff)
{
ul *mask;
unsigned mask_size_in_bytes;
@@ -237,7 +237,7 @@ static void process_pid_str(const char *pid_str, unsigned opts, char *aff)
/* Either it was just "-p <pid>",
* or it was "-p <aff> <pid>" and we came here
* for the second time (see goto below) */
return;
return 0;
}
current_new = "new";
}
@@ -312,6 +312,14 @@ static void process_pid_str(const char *pid_str, unsigned opts, char *aff)
aff = NULL;
goto print_aff; /* print new affinity and exit */
}
return 0;
}
static int FAST_FUNC iter(const char *dn UNUSED_PARAM, struct dirent *ent, void *aff)
{
if (isdigit(ent->d_name[0]))
return process_pid_str(ent->d_name, option_mask32, aff);
return 0;
}
int taskset_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
@@ -341,29 +349,20 @@ int taskset_main(int argc UNUSED_PARAM, char **argv)
pid_str = aff;
if (*argv) /* "-p <aff> <pid> ...rest.is.ignored..." */
pid_str = *argv; /* NB: *argv != NULL in this case */
pid_str = *argv;
else
aff = NULL;
if (opts & OPT_a) {
char *dn;
DIR *dir;
struct dirent *ent;
int r;
dn = xasprintf("/proc/%s/task", pid_str);
dir = opendir(dn);
r = iterate_on_dir(dn, iter, aff);
IF_FEATURE_CLEAN_UP(free(dn);)
if (!dir) {
goto no_threads;
}
while ((ent = readdir(dir)) != NULL) {
if (isdigit(ent->d_name[0]))
process_pid_str(ent->d_name, opts, aff);
}
IF_FEATURE_CLEAN_UP(closedir(dir);)
} else {
no_threads:
process_pid_str(pid_str, opts, aff);
if (r == 0)
return r; /* EXIT_SUCCESS */
/* else: no /proc/PID/task, act as if no -a was given */
}
return EXIT_SUCCESS;
return process_pid_str(pid_str, opts, aff);
}