scoutos / prex-0.9.0 / usr / sbin / install / install.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 | * This code is derived from software contributed to Berkeley by
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6 | * David Hitz of Auspex Systems Inc.
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7 | *
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8 | * Redistribution and use in source and binary forms, with or without
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9 | * modification, are permitted provided that the following conditions
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10 | * are met:
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11 | * 1. Redistributions of source code must retain the above copyright
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12 | * notice, this list of conditions and the following disclaimer.
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13 | * 2. Redistributions in binary form must reproduce the above copyright
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14 | * notice, this list of conditions and the following disclaimer in the
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15 | * documentation and/or other materials provided with the distribution.
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16 | * 3. Neither the name of the University nor the names of its contributors
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17 | * may be used to endorse or promote products derived from this software
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18 | * without specific prior written permission.
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19 | *
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20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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30 | * SUCH DAMAGE.
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31 | */
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32 | |||
33 | /* This code is derived from cp.c */
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34 | /* modified for Prex by Kohsuke Ohtani. */
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35 | |||
36 | /*
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37 | * install.c - software installer.
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38 | *
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39 | * Required capabilities:
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40 | * CAP_SYSFILES
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41 | */
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42 | |||
43 | #include <sys/stat.h> |
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44 | #include <sys/fcntl.h> |
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45 | |||
46 | #include <unistd.h> |
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47 | #include <err.h> |
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48 | #include <string.h> |
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49 | #include <stdlib.h> |
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50 | #include <errno.h> |
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51 | #include <limits.h> |
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52 | #include <libgen.h> |
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53 | #include <stdio.h> |
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54 | |||
55 | static void usage(void); |
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56 | static void error(void); |
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57 | static int copy(char *from, char *to); |
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58 | |||
59 | |||
60 | static char iobuf[BUFSIZ]; |
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61 | |||
62 | int
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63 | main(int argc, char *argv[]) |
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64 | { |
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65 | int r, ch, checkch, i;
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66 | char target[] = "/bin"; |
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67 | char *src;
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68 | struct stat to_stat;
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69 | |||
70 | if (argc < 2) |
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71 | usage(); |
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72 | if (!strcmp(argv[1], "-?")) |
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73 | usage(); |
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74 | |||
75 | r = stat(target, &to_stat); |
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76 | if (r == -1 && errno != ENOENT) |
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77 | error(); |
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78 | if (r == -1 || !S_ISDIR(to_stat.st_mode)) { |
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79 | error(); |
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80 | } else {
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81 | r = 0;
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82 | for (i = 1; i < argc; i++) { |
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83 | src = argv[i]; |
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84 | /*
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85 | * User confirmation is required for security.
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86 | */
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87 | fputs("Are you sure you want to install ", stdout);
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88 | fputs(basename(src), stdout); |
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89 | fputs("? (y/n) ", stdout);
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90 | checkch = ch = getchar(); |
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91 | while (ch != '\n' && ch != EOF) |
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92 | ch = getchar(); |
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93 | if (checkch != 'y') |
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94 | exit(0);
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95 | |||
96 | r = copy(src, target); |
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97 | if (r)
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98 | error(); |
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99 | } |
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100 | } |
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101 | exit(r); |
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102 | } |
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103 | |||
104 | static void |
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105 | usage(void)
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106 | { |
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107 | fputs("usage: install file\n", stderr);
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108 | exit(1);
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109 | /* NOTREACHED */
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110 | } |
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111 | |||
112 | static int |
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113 | copy(char *from, char *to) |
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114 | { |
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115 | char path[PATH_MAX];
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116 | int fold, fnew, n;
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117 | struct stat stbuf;
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118 | mode_t mode; |
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119 | char *p;
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120 | |||
121 | p = strrchr(from, '/');
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122 | p = p ? p + 1 : from;
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123 | strlcpy(path, to, sizeof(path));
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124 | strlcat(path, "/", sizeof(path)); |
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125 | strlcat(path, p, sizeof(path));
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126 | to = path; |
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127 | |||
128 | if ((fold = open(from, O_RDONLY)) == -1) |
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129 | return 1; |
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130 | fstat(fold, &stbuf); |
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131 | mode = stbuf.st_mode; |
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132 | |||
133 | if ((fnew = creat(to, mode)) == -1) { |
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134 | close(fold); |
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135 | return 1; |
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136 | } |
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137 | while ((n = read(fold, iobuf, BUFSIZ)) > 0) { |
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138 | if (write(fnew, iobuf, (size_t)n) != n) {
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139 | close(fold); |
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140 | close(fnew); |
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141 | return 1; |
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142 | } |
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143 | } |
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144 | close(fold); |
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145 | close(fnew); |
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146 | return 0; |
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147 | } |
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148 | |||
149 | static void |
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150 | error(void)
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151 | { |
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152 | perror("install");
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153 | } |