1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Mini ps implementation(s) 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 the GPL v2, see the file LICENSE in this tarball.
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8 | */
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9 |
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10 | #include "busybox.h"
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11 | #include <stdio.h>
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12 | #include <stdlib.h>
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13 | #include <unistd.h>
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14 | #include <dirent.h>
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15 | #include <errno.h>
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16 | #include <fcntl.h>
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17 | #include <ctype.h>
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18 | #include <string.h>
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19 | #include <termios.h>
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20 | #include <sys/ioctl.h>
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21 | #if ENABLE_SELINUX
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22 | #include <selinux/selinux.h> /* for is_selinux_enabled() */
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23 | #endif
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24 |
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25 | int ps_main(int argc, char **argv)
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26 | {
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27 | procps_status_t * p;
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28 | int i, len;
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29 |
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30 | #if ENABLE_SELINUX
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31 | int use_selinux = 0;
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32 | security_context_t sid=NULL;
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33 | #endif
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34 |
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35 | #if ENABLE_FEATURE_PS_WIDE
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36 | int terminal_width;
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37 | int w_count = 0;
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38 |
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39 | bb_opt_complementally="-:ww";
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40 | #else
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41 | # define terminal_width 79
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42 | #endif
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43 |
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44 | #if ENABLE_FEATURE_PS_WIDE || ENABLE_SELINUX
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45 | /* handle arguments */
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46 | #if ENABLE_FEATURE_PS_WIDE && ENABLE_SELINUX
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47 | i = bb_getopt_ulflags(argc, argv, "wc", &w_count);
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48 | #elif ENABLE_FEATURE_PS_WIDE && !ENABLE_SELINUX
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49 | bb_getopt_ulflags(argc, argv, "w", &w_count);
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50 | #else /* !ENABLE_FEATURE_PS_WIDE && ENABLE_SELINUX */
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51 | i = bb_getopt_ulflags(argc, argv, "c");
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52 | #endif
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53 | #if ENABLE_FEATURE_PS_WIDE
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54 | /* if w is given once, GNU ps sets the width to 132,
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55 | * if w is given more than once, it is "unlimited"
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56 | */
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57 | if(w_count) {
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58 | terminal_width = (w_count==1) ? 132 : INT_MAX;
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59 | } else {
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60 | get_terminal_width_height(1, &terminal_width, NULL);
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61 | /* Go one less... */
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62 | terminal_width--;
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63 | }
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64 | #endif
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65 | #if ENABLE_SELINUX
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66 | if ((i & (1+ENABLE_FEATURE_PS_WIDE)) && is_selinux_enabled())
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67 | use_selinux = 1;
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68 | #endif
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69 | #endif /* ENABLE_FEATURE_PS_WIDE || ENABLE_SELINUX */
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70 |
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71 | #if ENABLE_SELINUX
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72 | if (use_selinux)
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73 | printf(" PID Context Stat Command\n");
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74 | else
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75 | #endif
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76 | printf(" PID Uid VmSize Stat Command\n");
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77 |
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78 | while ((p = procps_scan(1)) != 0) {
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79 | char *namecmd = p->cmd;
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80 | #if ENABLE_SELINUX
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81 | if (use_selinux)
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82 | {
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83 | char sbuf[128];
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84 | len = sizeof(sbuf);
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85 |
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86 | if (is_selinux_enabled()) {
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87 | if (getpidcon(p->pid,&sid)<0)
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88 | sid=NULL;
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89 | }
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90 |
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91 | if (sid) {
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92 | /* I assume sid initilized with NULL */
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93 | len = strlen(sid)+1;
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94 | safe_strncpy(sbuf, sid, len);
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95 | freecon(sid);
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96 | sid=NULL;
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97 | }else {
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98 | safe_strncpy(sbuf, "unknown",7);
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99 | }
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100 | len = printf("%5d %-32s %s ", p->pid, sbuf, p->state);
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101 | }
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102 | else
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103 | #endif
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104 | if(p->rss == 0)
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105 | len = printf("%5d %-8s %s ", p->pid, p->user, p->state);
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106 | else
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107 | len = printf("%5d %-8s %6ld %s ", p->pid, p->user, p->rss, p->state);
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108 |
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109 | i = terminal_width-len;
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110 |
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111 | if(namecmd && namecmd[0]) {
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112 | if(i < 0)
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113 | i = 0;
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114 | if(strlen(namecmd) > (size_t)i)
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115 | namecmd[i] = 0;
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116 | printf("%s\n", namecmd);
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117 | } else {
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118 | namecmd = p->short_cmd;
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119 | if(i < 2)
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120 | i = 2;
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121 | if(strlen(namecmd) > ((size_t)i-2))
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122 | namecmd[i-2] = 0;
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123 | printf("[%s]\n", namecmd);
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124 | }
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125 | /* no check needed, but to make valgrind happy.. */
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126 | if (ENABLE_FEATURE_CLEAN_UP && p->cmd)
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127 | free(p->cmd);
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128 | }
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129 | return EXIT_SUCCESS;
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130 | }
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