landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 1 | /* Toybox infrastructure. |
| 2 | * |
| 3 | * Copyright 2006 Rob Landley <rob@landley.net> |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 4 | */ |
| 5 | |
landley | c562150 | 2006-09-28 17:18:51 -0400 | [diff] [blame] | 6 | #include "toys.h" |
| 7 | |
Rob Landley | f2311a4 | 2006-11-04 17:45:18 -0500 | [diff] [blame] | 8 | // Populate toy_list[]. |
landley | c562150 | 2006-09-28 17:18:51 -0400 | [diff] [blame] | 9 | |
Rob Landley | a6d696b | 2007-01-31 13:31:19 -0500 | [diff] [blame] | 10 | #undef NEWTOY |
| 11 | #undef OLDTOY |
| 12 | #define NEWTOY(name, opts, flags) {#name, name##_main, opts, flags}, |
| 13 | #define OLDTOY(name, oldname, opts, flags) {#name, oldname##_main, opts, flags}, |
| 14 | |
landley | c562150 | 2006-09-28 17:18:51 -0400 | [diff] [blame] | 15 | struct toy_list toy_list[] = { |
Rob Landley | 55928b1 | 2008-01-19 17:43:27 -0600 | [diff] [blame] | 16 | #include "generated/newtoys.h" |
landley | c562150 | 2006-09-28 17:18:51 -0400 | [diff] [blame] | 17 | }; |
| 18 | |
Rob Landley | 933919c | 2013-04-21 12:15:59 -0500 | [diff] [blame] | 19 | // global context for this command. |
landley | c562150 | 2006-09-28 17:18:51 -0400 | [diff] [blame] | 20 | |
| 21 | struct toy_context toys; |
Rob Landley | b1aaba1 | 2008-01-20 17:25:44 -0600 | [diff] [blame] | 22 | union global_union this; |
Rob Landley | 8fdcfdb | 2013-09-03 17:56:28 -0500 | [diff] [blame] | 23 | char toybuf[4096], libbuf[4096]; |
landley | c562150 | 2006-09-28 17:18:51 -0400 | [diff] [blame] | 24 | |
landley | 4f344e3 | 2006-10-05 16:18:03 -0400 | [diff] [blame] | 25 | struct toy_list *toy_find(char *name) |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 26 | { |
Rob Landley | 7aa651a | 2012-11-13 17:14:08 -0600 | [diff] [blame] | 27 | int top, bottom, middle; |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 28 | |
Rob Landley | 7aa651a | 2012-11-13 17:14:08 -0600 | [diff] [blame] | 29 | // If the name starts with "toybox" accept that as a match. Otherwise |
| 30 | // skip the first entry, which is out of order. |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 31 | |
Rob Landley | 7aa651a | 2012-11-13 17:14:08 -0600 | [diff] [blame] | 32 | if (!strncmp(name,"toybox",6)) return toy_list; |
| 33 | bottom = 1; |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 34 | |
Rob Landley | 933919c | 2013-04-21 12:15:59 -0500 | [diff] [blame] | 35 | // Binary search to find this command. |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 36 | |
Rob Landley | 7aa651a | 2012-11-13 17:14:08 -0600 | [diff] [blame] | 37 | top = ARRAY_LEN(toy_list)-1; |
| 38 | for (;;) { |
| 39 | int result; |
Rob Landley | 2c22685 | 2007-11-15 18:30:30 -0600 | [diff] [blame] | 40 | |
Rob Landley | 7aa651a | 2012-11-13 17:14:08 -0600 | [diff] [blame] | 41 | middle = (top+bottom)/2; |
| 42 | if (middle<bottom || middle>top) return NULL; |
| 43 | result = strcmp(name,toy_list[middle].name); |
| 44 | if (!result) return toy_list+middle; |
| 45 | if (result<0) top=--middle; |
| 46 | else bottom = ++middle; |
| 47 | } |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 48 | } |
| 49 | |
Rob Landley | fc2224b | 2007-06-01 14:31:45 -0400 | [diff] [blame] | 50 | // Figure out whether or not anything is using the option parsing logic, |
| 51 | // because the compiler can't figure out whether or not to optimize it away |
Rob Landley | 8f8c504 | 2012-01-14 23:28:15 -0600 | [diff] [blame] | 52 | // on its' own. NEED_OPTIONS becomes a constant allowing if() to optimize |
| 53 | // stuff out via dead code elimination. |
Rob Landley | fc2224b | 2007-06-01 14:31:45 -0400 | [diff] [blame] | 54 | |
| 55 | #undef NEWTOY |
| 56 | #undef OLDTOY |
| 57 | #define NEWTOY(name, opts, flags) opts || |
| 58 | #define OLDTOY(name, oldname, opts, flags) opts || |
Rob Landley | 4307a7b | 2007-06-07 15:20:26 -0400 | [diff] [blame] | 59 | static const int NEED_OPTIONS = |
Rob Landley | 55928b1 | 2008-01-19 17:43:27 -0600 | [diff] [blame] | 60 | #include "generated/newtoys.h" |
Rob Landley | fc2224b | 2007-06-01 14:31:45 -0400 | [diff] [blame] | 61 | 0; // Ends the opts || opts || opts... |
| 62 | |
Rob Landley | bb504f3 | 2013-07-19 02:03:02 -0500 | [diff] [blame] | 63 | // Subset of init needed by singlemain |
| 64 | static void toy_singleinit(struct toy_list *which, char *argv[]) |
| 65 | { |
| 66 | toys.which = which; |
| 67 | toys.argv = argv; |
| 68 | |
| 69 | if (CFG_TOYBOX_HELP_DASHDASH && argv[1] && !strcmp(argv[1], "--help")) { |
Rob Landley | 5f80533 | 2013-08-21 03:03:47 -0500 | [diff] [blame] | 70 | if (toys.which == toy_list && toys.argv[2]) |
| 71 | if (!(toys.which = toy_find(toys.argv[2]))) return; |
Rob Landley | bb504f3 | 2013-07-19 02:03:02 -0500 | [diff] [blame] | 72 | show_help(); |
| 73 | xexit(); |
| 74 | } |
| 75 | |
| 76 | if (NEED_OPTIONS && which->options) get_optflags(); |
| 77 | else { |
| 78 | toys.optargs = argv+1; |
| 79 | for (toys.optc=0; toys.optargs[toys.optc]; toys.optc++); |
| 80 | } |
| 81 | toys.old_umask = umask(0); |
| 82 | if (!(which->flags & TOYFLAG_UMASK)) umask(toys.old_umask); |
Rob Landley | 1bc5224 | 2014-05-21 07:24:16 -0500 | [diff] [blame] | 83 | toys.signalfd--; |
Rob Landley | bb504f3 | 2013-07-19 02:03:02 -0500 | [diff] [blame] | 84 | } |
| 85 | |
Rob Landley | 8f8c504 | 2012-01-14 23:28:15 -0600 | [diff] [blame] | 86 | // Setup toybox global state for this command. |
| 87 | |
landley | cd9dfc3 | 2006-10-18 18:38:16 -0400 | [diff] [blame] | 88 | void toy_init(struct toy_list *which, char *argv[]) |
| 89 | { |
Rob Landley | 7aa651a | 2012-11-13 17:14:08 -0600 | [diff] [blame] | 90 | // Drop permissions for non-suid commands. |
Rob Landley | e0377fb | 2010-01-05 12:17:05 -0600 | [diff] [blame] | 91 | |
Rob Landley | 7aa651a | 2012-11-13 17:14:08 -0600 | [diff] [blame] | 92 | if (CFG_TOYBOX_SUID) { |
| 93 | uid_t uid = getuid(), euid = geteuid(); |
Rob Landley | e0377fb | 2010-01-05 12:17:05 -0600 | [diff] [blame] | 94 | |
Rob Landley | 7aa651a | 2012-11-13 17:14:08 -0600 | [diff] [blame] | 95 | if (!(which->flags & TOYFLAG_STAYROOT)) { |
Rob Landley | afba5b8 | 2013-12-23 06:49:38 -0600 | [diff] [blame] | 96 | if (uid != euid) |
| 97 | if (!setuid(euid=uid)) perror_exit("setuid"); // drop root |
Rob Landley | bf1e70f | 2012-12-27 17:09:17 -0600 | [diff] [blame] | 98 | } else if (CFG_TOYBOX_DEBUG && uid && which != toy_list) |
| 99 | error_msg("Not installed suid root"); |
Rob Landley | e0377fb | 2010-01-05 12:17:05 -0600 | [diff] [blame] | 100 | |
Rob Landley | 3bc5d3d | 2014-05-24 13:50:19 -0500 | [diff] [blame] | 101 | if ((which->flags & TOYFLAG_NEEDROOT) && euid) { |
| 102 | toys.exithelp++; |
| 103 | error_exit("Not root"); |
| 104 | } |
Rob Landley | 7aa651a | 2012-11-13 17:14:08 -0600 | [diff] [blame] | 105 | } |
Rob Landley | e0377fb | 2010-01-05 12:17:05 -0600 | [diff] [blame] | 106 | |
Rob Landley | caf39c2 | 2012-11-16 00:35:46 -0600 | [diff] [blame] | 107 | // Free old toys contents (to be reentrant), but leave rebound if any |
Rob Landley | db037ef | 2010-01-06 05:29:17 -0600 | [diff] [blame] | 108 | |
Rob Landley | 7aa651a | 2012-11-13 17:14:08 -0600 | [diff] [blame] | 109 | if (toys.optargs != toys.argv+1) free(toys.optargs); |
Rob Landley | caf39c2 | 2012-11-16 00:35:46 -0600 | [diff] [blame] | 110 | memset(&toys, 0, offsetof(struct toy_context, rebound)); |
landley | cd9dfc3 | 2006-10-18 18:38:16 -0400 | [diff] [blame] | 111 | |
Rob Landley | bb504f3 | 2013-07-19 02:03:02 -0500 | [diff] [blame] | 112 | // Subset of init needed by singlemain. |
| 113 | toy_singleinit(which, argv); |
landley | cd9dfc3 | 2006-10-18 18:38:16 -0400 | [diff] [blame] | 114 | } |
| 115 | |
Rob Landley | 8f8c504 | 2012-01-14 23:28:15 -0600 | [diff] [blame] | 116 | // Like exec() but runs an internal toybox command instead of another file. |
| 117 | // Only returns if it can't find the command, otherwise exit() when done. |
landley | 4f344e3 | 2006-10-05 16:18:03 -0400 | [diff] [blame] | 118 | void toy_exec(char *argv[]) |
| 119 | { |
Rob Landley | 7aa651a | 2012-11-13 17:14:08 -0600 | [diff] [blame] | 120 | struct toy_list *which; |
Rob Landley | b841cd2 | 2007-06-01 13:41:24 -0400 | [diff] [blame] | 121 | |
Rob Landley | 09ee264 | 2013-05-08 23:19:45 -0500 | [diff] [blame] | 122 | if (!(which = toy_find(argv[0]))) return; |
Rob Landley | 7aa651a | 2012-11-13 17:14:08 -0600 | [diff] [blame] | 123 | toy_init(which, argv); |
Rob Landley | 5f80533 | 2013-08-21 03:03:47 -0500 | [diff] [blame] | 124 | if (toys.which) toys.which->toy_main(); |
Rob Landley | a48e579 | 2012-12-23 01:25:27 -0600 | [diff] [blame] | 125 | if (fflush(NULL) || ferror(stdout)) perror_exit("write"); |
Rob Landley | 953722e | 2013-06-30 15:58:24 -0500 | [diff] [blame] | 126 | xexit(); |
landley | 4f344e3 | 2006-10-05 16:18:03 -0400 | [diff] [blame] | 127 | } |
| 128 | |
Rob Landley | 8f8c504 | 2012-01-14 23:28:15 -0600 | [diff] [blame] | 129 | // Multiplexer command, first argument is command to run, rest are args to that. |
| 130 | // If first argument starts with - output list of command install paths. |
| 131 | |
Rob Landley | efda21c | 2007-11-29 18:14:37 -0600 | [diff] [blame] | 132 | void toybox_main(void) |
landley | 4f344e3 | 2006-10-05 16:18:03 -0400 | [diff] [blame] | 133 | { |
Rob Landley | 7aa651a | 2012-11-13 17:14:08 -0600 | [diff] [blame] | 134 | static char *toy_paths[]={"usr/","bin/","sbin/",0}; |
| 135 | int i, len = 0; |
landley | 4f344e3 | 2006-10-05 16:18:03 -0400 | [diff] [blame] | 136 | |
Rob Landley | 6c62448 | 2012-11-18 18:52:19 -0600 | [diff] [blame] | 137 | toys.which = toy_list; |
Rob Landley | 7aa651a | 2012-11-13 17:14:08 -0600 | [diff] [blame] | 138 | if (toys.argv[1]) { |
Rob Landley | 52ab00b | 2014-04-01 18:18:46 -0500 | [diff] [blame] | 139 | toys.optc = 0; |
Rob Landley | 5f80533 | 2013-08-21 03:03:47 -0500 | [diff] [blame] | 140 | toy_exec(toys.argv+1); |
| 141 | if (toys.argv[1][0] == '-') goto list; |
Rob Landley | 09ee264 | 2013-05-08 23:19:45 -0500 | [diff] [blame] | 142 | |
| 143 | error_exit("Unknown command %s",toys.argv[1]); |
Rob Landley | 7aa651a | 2012-11-13 17:14:08 -0600 | [diff] [blame] | 144 | } |
landley | 4f344e3 | 2006-10-05 16:18:03 -0400 | [diff] [blame] | 145 | |
Rob Landley | 09ee264 | 2013-05-08 23:19:45 -0500 | [diff] [blame] | 146 | list: |
Rob Landley | 933919c | 2013-04-21 12:15:59 -0500 | [diff] [blame] | 147 | // Output list of command. |
Rob Landley | 7aa651a | 2012-11-13 17:14:08 -0600 | [diff] [blame] | 148 | for (i=1; i<ARRAY_LEN(toy_list); i++) { |
| 149 | int fl = toy_list[i].flags; |
| 150 | if (fl & TOYMASK_LOCATION) { |
| 151 | if (toys.argv[1]) { |
| 152 | int j; |
| 153 | for (j=0; toy_paths[j]; j++) |
| 154 | if (fl & (1<<j)) len += printf("%s", toy_paths[j]); |
| 155 | } |
| 156 | len += printf("%s ",toy_list[i].name); |
| 157 | if (len>65) { |
| 158 | xputc('\n'); |
| 159 | len=0; |
| 160 | } |
| 161 | } |
| 162 | } |
| 163 | xputc('\n'); |
landley | 4f344e3 | 2006-10-05 16:18:03 -0400 | [diff] [blame] | 164 | } |
| 165 | |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 166 | int main(int argc, char *argv[]) |
| 167 | { |
Rob Landley | 6cf0a11 | 2012-11-26 14:14:29 -0600 | [diff] [blame] | 168 | if (CFG_TOYBOX_I18N) setlocale(LC_ALL, ""); |
| 169 | |
Rob Landley | 36aa7d7 | 2014-03-28 17:48:02 -0500 | [diff] [blame] | 170 | toys.toycount = ARRAY_LEN(toy_list); |
| 171 | |
Rob Landley | d04dc1f | 2013-08-30 01:53:31 -0500 | [diff] [blame] | 172 | if (CFG_TOYBOX) { |
Rob Landley | bb504f3 | 2013-07-19 02:03:02 -0500 | [diff] [blame] | 173 | // Trim path off of command name |
| 174 | *argv = basename(*argv); |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 175 | |
Rob Landley | bb504f3 | 2013-07-19 02:03:02 -0500 | [diff] [blame] | 176 | // Call the multiplexer, adjusting this argv[] to be its' argv[1]. |
| 177 | // (It will adjust it back before calling toy_exec().) |
| 178 | toys.argv = argv-1; |
| 179 | toybox_main(); |
| 180 | } else { |
| 181 | // a single toybox command built standalone with no multiplexer |
| 182 | toy_singleinit(toy_list, argv); |
| 183 | toy_list->toy_main(); |
| 184 | if (fflush(NULL) || ferror(stdout)) perror_exit("write"); |
| 185 | } |
| 186 | |
| 187 | return toys.exitval; |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 188 | } |