scoutos / prex-0.9.0 / usr / bin / kill / kill.c @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*
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2 | * Copyright (c) 1988, 1993, 1994
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3 | * The Regents of the University of California. All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without
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6 | * modification, are permitted provided that the following conditions
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7 | * are met:
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8 | * 1. Redistributions of source code must retain the above copyright
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9 | * notice, this list of conditions and the following disclaimer.
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10 | * 2. Redistributions in binary form must reproduce the above copyright
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11 | * notice, this list of conditions and the following disclaimer in the
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12 | * documentation and/or other materials provided with the distribution.
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13 | * 3. Neither the name of the University nor the names of its contributors
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14 | * may be used to endorse or promote products derived from this software
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15 | * without specific prior written permission.
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16 | *
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17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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27 | * SUCH DAMAGE.
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28 | */
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29 | |||
30 | #include <ctype.h> |
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31 | #include <err.h> |
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32 | #include <errno.h> |
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33 | #include <signal.h> |
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34 | #include <stdio.h> |
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35 | #include <stdlib.h> |
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36 | #include <string.h> |
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37 | |||
38 | #ifdef CMDBOX
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39 | #define main(argc, argv) kill_main(argc, argv)
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40 | #endif
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41 | |||
42 | static void nosig(char *); |
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43 | static void printsignals(FILE *); |
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44 | static int signame_to_signum(char *); |
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45 | static void usage(void); |
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46 | |||
47 | int
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48 | main(int argc, char *argv[]) |
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49 | { |
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50 | int errors, numsig, pid;
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51 | char *ep;
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52 | |||
53 | if (argc < 2) |
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54 | usage(); |
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55 | |||
56 | numsig = SIGTERM; |
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57 | |||
58 | argc--; |
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59 | argv++; |
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60 | if (!strcmp(*argv, "-l")) { |
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61 | argc--, argv++; |
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62 | if (argc > 1) |
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63 | usage(); |
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64 | if (argc == 1) { |
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65 | if (isdigit((unsigned char)**argv) == 0) |
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66 | usage(); |
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67 | numsig = strtol(*argv, &ep, 10);
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68 | if (!*argv || *ep)
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69 | errx(1, "illegal signal number: %s", *argv); |
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70 | if (numsig >= 128) |
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71 | numsig -= 128;
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72 | if (numsig <= 0 || numsig >= NSIG) |
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73 | nosig(*argv); |
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74 | printf("%s\n", sys_signame[numsig]);
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75 | exit(0);
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76 | } |
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77 | printsignals(stdout); |
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78 | exit(0);
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79 | } |
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80 | |||
81 | if (!strcmp(*argv, "-s")) { |
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82 | argc--, argv++; |
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83 | if (argc < 1) { |
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84 | warnx("option requires an argument -- s");
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85 | usage(); |
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86 | } |
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87 | if (strcmp(*argv, "0")) { |
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88 | if ((numsig = signame_to_signum(*argv)) < 0) |
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89 | nosig(*argv); |
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90 | } else
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91 | numsig = 0;
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92 | argc--, argv++; |
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93 | } else if (**argv == '-') { |
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94 | ++*argv; |
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95 | if (isalpha(**argv)) {
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96 | if ((numsig = signame_to_signum(*argv)) < 0) |
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97 | nosig(*argv); |
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98 | } else if (isdigit(**argv)) { |
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99 | numsig = strtol(*argv, &ep, 10);
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100 | if (!*argv || *ep)
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101 | errx(1, "illegal signal number: %s", *argv); |
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102 | if (numsig <= 0 || numsig >= NSIG) |
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103 | nosig(*argv); |
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104 | } else
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105 | nosig(*argv); |
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106 | argc--, argv++; |
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107 | } |
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108 | |||
109 | if (argc == 0) |
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110 | usage(); |
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111 | |||
112 | for (errors = 0; argc; argc--, argv++) { |
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113 | pid = strtol(*argv, &ep, 10);
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114 | if (!*argv || *ep) {
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115 | warnx("illegal process id: %s", *argv);
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116 | errors = 1;
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117 | } else if (kill(pid, numsig) == -1) { |
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118 | warn("%s", *argv);
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119 | errors = 1;
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120 | } |
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121 | } |
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122 | |||
123 | exit(errors); |
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124 | } |
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125 | |||
126 | static int |
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127 | signame_to_signum(sig) |
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128 | char *sig;
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129 | { |
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130 | int n;
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131 | |||
132 | if (!strncasecmp(sig, "sig", 3)) |
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133 | sig += 3;
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134 | for (n = 1; n < NSIG; n++) { |
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135 | if (!strcasecmp(sys_signame[n], sig))
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136 | return n;
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137 | } |
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138 | return -1; |
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139 | } |
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140 | |||
141 | static void |
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142 | nosig(name) |
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143 | char *name;
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144 | { |
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145 | |||
146 | warnx("unknown signal %s; valid signals:", name);
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147 | printsignals(stderr); |
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148 | exit(1);
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149 | /* NOTREACHED */
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150 | } |
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151 | |||
152 | static void |
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153 | printsignals(fp) |
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154 | FILE *fp; |
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155 | { |
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156 | int n;
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157 | const char *name; |
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158 | |||
159 | for (n = 1; n < NSIG; n++) { |
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160 | name = sys_signame[n]; |
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161 | if (n == (NSIG / 2) || n == (NSIG - 1)) |
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162 | (void)fprintf(fp, "%s\n", name); |
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163 | else
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164 | (void)fprintf(fp, "%s ", name); |
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165 | } |
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166 | } |
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167 | |||
168 | static void |
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169 | usage(void)
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170 | { |
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171 | |||
172 | fprintf(stderr, "usage: kill [-s signal_name] pid ...\n"
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173 | " kill -l [exit_status]\n"
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174 | " kill -signal_name pid ...\n"
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175 | " kill -signal_number pid ...\n");
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176 | exit(1);
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177 | /* NOTREACHED */
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178 | } |