* Licensed under the GPL version 2, see the file LICENSE in this tarball.
*/
-#include "busybox.h"
+#include "libbb.h"
-#if ENABLE_FEATURE_PIDOF_SINGLE
-#define _SINGLE_COMPL(a) a
-#define SINGLE (1<<0)
-#else
-#define _SINGLE_COMPL(a)
-#define SINGLE 0
-#endif
-
-#if ENABLE_FEATURE_PIDOF_OMIT
-# define _OMIT_COMPL(a) a
-# define _OMIT(a) ,a
-# if ENABLE_FEATURE_PIDOF_SINGLE
-# define OMIT (1<<1)
-# else
-# define OMIT (1<<0)
-# endif
-#else
-# define _OMIT_COMPL(a) ""
-# define _OMIT(a)
-# define OMIT (0)
-# define omitted (0)
-#endif
+enum {
+ IF_FEATURE_PIDOF_SINGLE(OPTBIT_SINGLE,)
+ IF_FEATURE_PIDOF_OMIT( OPTBIT_OMIT ,)
+ OPT_SINGLE = IF_FEATURE_PIDOF_SINGLE((1<<OPTBIT_SINGLE)) + 0,
+ OPT_OMIT = IF_FEATURE_PIDOF_OMIT( (1<<OPTBIT_OMIT )) + 0,
+};
-int pidof_main(int argc, char **argv)
+int pidof_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int pidof_main(int argc UNUSED_PARAM, char **argv)
{
- unsigned n = 0;
- unsigned fail = 1;
- unsigned long int opt;
+ unsigned first = 1;
+ unsigned opt;
#if ENABLE_FEATURE_PIDOF_OMIT
llist_t *omits = NULL; /* list of pids to omit */
- opt_complementary = _OMIT_COMPL("o::");
+ opt_complementary = "o::";
#endif
/* do unconditional option parsing */
- opt = getopt32(argc, argv,
- _SINGLE_COMPL("s") _OMIT_COMPL("o:")
- _OMIT(&omits));
+ opt = getopt32(argv, ""
+ IF_FEATURE_PIDOF_SINGLE ("s")
+ IF_FEATURE_PIDOF_OMIT("o:", &omits));
#if ENABLE_FEATURE_PIDOF_OMIT
/* fill omit list. */
{
- char getppid_str[32];
- llist_t * omits_p = omits;
- while (omits_p) {
+ llist_t *omits_p = omits;
+ while (1) {
+ omits_p = llist_find_str(omits_p, "%PPID");
+ if (!omits_p)
+ break;
/* are we asked to exclude the parent's process ID? */
- if (!strncmp(omits_p->data, "%PPID", 5)) {
- llist_pop(&omits_p);
- snprintf(getppid_str, sizeof(getppid_str), "%ld", (long)getppid());
- llist_add_to(&omits_p, getppid_str);
- }
- omits_p = omits_p->link;
+ omits_p->data = utoa((unsigned)getppid());
}
}
#endif
/* Looks like everything is set to go. */
- while (optind < argc) {
+ argv += optind;
+ while (*argv) {
pid_t *pidList;
pid_t *pl;
/* reverse the pidlist like GNU pidof does. */
- pidList = pidlist_reverse(find_pid_by_name(argv[optind]));
+ pidList = pidlist_reverse(find_pid_by_name(*argv));
for (pl = pidList; *pl; pl++) {
#if ENABLE_FEATURE_PIDOF_OMIT
- unsigned omitted = 0;
- if (opt & OMIT) {
+ if (opt & OPT_OMIT) {
llist_t *omits_p = omits;
while (omits_p) {
- if (xatoul(omits_p->data) == *pl) {
- omitted = 1;
- break;
- } else
- omits_p = omits_p->link;
+ if (xatoul(omits_p->data) == (unsigned long)(*pl)) {
+ goto omitting;
+ }
+ omits_p = omits_p->link;
}
}
#endif
- if (!omitted) {
- if (n) {
- putchar(' ');
- } else {
- n = 1;
- }
- printf("%u", (unsigned)*pl);
- }
- fail = (!ENABLE_FEATURE_PIDOF_OMIT && omitted);
-
- if (ENABLE_FEATURE_PIDOF_SINGLE && (opt & SINGLE))
+ printf(" %u" + first, (unsigned)*pl);
+ first = 0;
+ if (ENABLE_FEATURE_PIDOF_SINGLE && (opt & OPT_SINGLE))
break;
+#if ENABLE_FEATURE_PIDOF_OMIT
+ omitting: ;
+#endif
}
free(pidList);
- optind++;
+ argv++;
}
- putchar('\n');
+ if (!first)
+ bb_putchar('\n');
#if ENABLE_FEATURE_PIDOF_OMIT
if (ENABLE_FEATURE_CLEAN_UP)
llist_free(omits, NULL);
#endif
- return fail ? EXIT_FAILURE : EXIT_SUCCESS;
+ return first; /* 1 (failure) - no processes found */
}