1/* vi: set sw=4 ts=4: */ 2/* 3 * pidof implementation for busybox 4 * 5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> 6 * 7 * Licensed under the GPL version 2, see the file LICENSE in this tarball. 8 */ 9 10#include "libbb.h" 11 12enum { 13 IF_FEATURE_PIDOF_SINGLE(OPTBIT_SINGLE,) 14 IF_FEATURE_PIDOF_OMIT( OPTBIT_OMIT ,) 15 OPT_SINGLE = IF_FEATURE_PIDOF_SINGLE((1<<OPTBIT_SINGLE)) + 0, 16 OPT_OMIT = IF_FEATURE_PIDOF_OMIT( (1<<OPTBIT_OMIT )) + 0, 17}; 18 19int pidof_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; 20int pidof_main(int argc UNUSED_PARAM, char **argv) 21{ 22 unsigned first = 1; 23 unsigned opt; 24#if ENABLE_FEATURE_PIDOF_OMIT 25 llist_t *omits = NULL; /* list of pids to omit */ 26 opt_complementary = "o::"; 27#endif 28 29 /* do unconditional option parsing */ 30 opt = getopt32(argv, "" 31 IF_FEATURE_PIDOF_SINGLE ("s") 32 IF_FEATURE_PIDOF_OMIT("o:", &omits)); 33 34#if ENABLE_FEATURE_PIDOF_OMIT 35 /* fill omit list. */ 36 { 37 llist_t *omits_p = omits; 38 while (1) { 39 omits_p = llist_find_str(omits_p, "%PPID"); 40 if (!omits_p) 41 break; 42 /* are we asked to exclude the parent's process ID? */ 43 omits_p->data = utoa((unsigned)getppid()); 44 } 45 } 46#endif 47 /* Looks like everything is set to go. */ 48 argv += optind; 49 while (*argv) { 50 pid_t *pidList; 51 pid_t *pl; 52 53 /* reverse the pidlist like GNU pidof does. */ 54 pidList = pidlist_reverse(find_pid_by_name(*argv)); 55 for (pl = pidList; *pl; pl++) { 56#if ENABLE_FEATURE_PIDOF_OMIT 57 if (opt & OPT_OMIT) { 58 llist_t *omits_p = omits; 59 while (omits_p) { 60 if (xatoul(omits_p->data) == (unsigned long)(*pl)) { 61 goto omitting; 62 } 63 omits_p = omits_p->link; 64 } 65 } 66#endif 67 printf(" %u" + first, (unsigned)*pl); 68 first = 0; 69 if (ENABLE_FEATURE_PIDOF_SINGLE && (opt & OPT_SINGLE)) 70 break; 71#if ENABLE_FEATURE_PIDOF_OMIT 72 omitting: ; 73#endif 74 } 75 free(pidList); 76 argv++; 77 } 78 if (!first) 79 bb_putchar('\n'); 80 81#if ENABLE_FEATURE_PIDOF_OMIT 82 if (ENABLE_FEATURE_CLEAN_UP) 83 llist_free(omits, NULL); 84#endif 85 return first; /* 1 (failure) - no processes found */ 86} 87