1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * pidof implementation for busybox
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4 | *
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5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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6 | *
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7 | * Licensed under GPLv2, see file LICENSE in this source tree.
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8 | */
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9 |
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10 | //usage:#if (ENABLE_FEATURE_PIDOF_SINGLE || ENABLE_FEATURE_PIDOF_OMIT)
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11 | //usage:#define pidof_trivial_usage
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12 | //usage: "[OPTIONS] [NAME]..."
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13 | //usage:#define USAGE_PIDOF "\n"
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14 | //usage:#else
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15 | //usage:#define pidof_trivial_usage
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16 | //usage: "[NAME]..."
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17 | //usage:#define USAGE_PIDOF /* none */
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18 | //usage:#endif
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19 | //usage:#define pidof_full_usage "\n\n"
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20 | //usage: "List PIDs of all processes with names that match NAMEs"
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21 | //usage: USAGE_PIDOF
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22 | //usage: IF_FEATURE_PIDOF_SINGLE(
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23 | //usage: "\n -s Show only one PID"
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24 | //usage: )
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25 | //usage: IF_FEATURE_PIDOF_OMIT(
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26 | //usage: "\n -o PID Omit given pid"
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27 | //usage: "\n Use %PPID to omit pid of pidof's parent"
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28 | //usage: )
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29 | //usage:
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30 | //usage:#define pidof_example_usage
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31 | //usage: "$ pidof init\n"
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32 | //usage: "1\n"
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33 | //usage: IF_FEATURE_PIDOF_OMIT(
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34 | //usage: "$ pidof /bin/sh\n20351 5973 5950\n")
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35 | //usage: IF_FEATURE_PIDOF_OMIT(
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36 | //usage: "$ pidof /bin/sh -o %PPID\n20351 5950")
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37 |
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38 | #include "libbb.h"
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39 |
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40 | enum {
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41 | IF_FEATURE_PIDOF_SINGLE(OPTBIT_SINGLE,)
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42 | IF_FEATURE_PIDOF_OMIT( OPTBIT_OMIT ,)
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43 | OPT_SINGLE = IF_FEATURE_PIDOF_SINGLE((1<<OPTBIT_SINGLE)) + 0,
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44 | OPT_OMIT = IF_FEATURE_PIDOF_OMIT( (1<<OPTBIT_OMIT )) + 0,
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45 | };
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46 |
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47 | int pidof_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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48 | int pidof_main(int argc UNUSED_PARAM, char **argv)
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49 | {
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50 | unsigned first = 1;
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51 | unsigned opt;
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52 | #if ENABLE_FEATURE_PIDOF_OMIT
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53 | llist_t *omits = NULL; /* list of pids to omit */
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54 | opt_complementary = "o::";
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55 | #endif
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56 |
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57 | /* do unconditional option parsing */
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58 | opt = getopt32(argv, ""
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59 | IF_FEATURE_PIDOF_SINGLE ("s")
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60 | IF_FEATURE_PIDOF_OMIT("o:", &omits));
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61 |
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62 | #if ENABLE_FEATURE_PIDOF_OMIT
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63 | /* fill omit list. */
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64 | {
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65 | llist_t *omits_p = omits;
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66 | while (1) {
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67 | omits_p = llist_find_str(omits_p, "%PPID");
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68 | if (!omits_p)
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69 | break;
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70 | /* are we asked to exclude the parent's process ID? */
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71 | omits_p->data = utoa((unsigned)getppid());
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72 | }
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73 | }
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74 | #endif
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75 | /* Looks like everything is set to go. */
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76 | argv += optind;
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77 | while (*argv) {
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78 | pid_t *pidList;
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79 | pid_t *pl;
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80 |
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81 | /* reverse the pidlist like GNU pidof does. */
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82 | pidList = pidlist_reverse(find_pid_by_name(*argv));
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83 | for (pl = pidList; *pl; pl++) {
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84 | #if ENABLE_FEATURE_PIDOF_OMIT
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85 | if (opt & OPT_OMIT) {
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86 | llist_t *omits_p = omits;
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87 | while (omits_p) {
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88 | if (xatoul(omits_p->data) == (unsigned long)(*pl)) {
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89 | goto omitting;
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90 | }
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91 | omits_p = omits_p->link;
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92 | }
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93 | }
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94 | #endif
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95 | printf(" %u" + first, (unsigned)*pl);
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96 | first = 0;
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97 | if (ENABLE_FEATURE_PIDOF_SINGLE && (opt & OPT_SINGLE))
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98 | break;
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99 | #if ENABLE_FEATURE_PIDOF_OMIT
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100 | omitting: ;
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101 | #endif
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102 | }
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103 | free(pidList);
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104 | argv++;
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105 | }
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106 | if (!first)
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107 | bb_putchar('\n');
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108 |
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109 | #if ENABLE_FEATURE_PIDOF_OMIT
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110 | if (ENABLE_FEATURE_CLEAN_UP)
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111 | llist_free(omits, NULL);
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112 | #endif
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113 | return first; /* 1 (failure) - no processes found */
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114 | }
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