landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 1 | /* vi: set ts=4 :*/ |
| 2 | /* Toybox infrastructure. |
| 3 | * |
| 4 | * Copyright 2006 Rob Landley <rob@landley.net> |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 5 | */ |
| 6 | |
landley | c562150 | 2006-09-28 17:18:51 -0400 | [diff] [blame] | 7 | #include "toys.h" |
| 8 | |
Rob Landley | f2311a4 | 2006-11-04 17:45:18 -0500 | [diff] [blame] | 9 | // Populate toy_list[]. |
landley | c562150 | 2006-09-28 17:18:51 -0400 | [diff] [blame] | 10 | |
Rob Landley | a6d696b | 2007-01-31 13:31:19 -0500 | [diff] [blame] | 11 | #undef NEWTOY |
| 12 | #undef OLDTOY |
| 13 | #define NEWTOY(name, opts, flags) {#name, name##_main, opts, flags}, |
| 14 | #define OLDTOY(name, oldname, opts, flags) {#name, oldname##_main, opts, flags}, |
| 15 | |
landley | c562150 | 2006-09-28 17:18:51 -0400 | [diff] [blame] | 16 | struct toy_list toy_list[] = { |
Rob Landley | 55928b1 | 2008-01-19 17:43:27 -0600 | [diff] [blame] | 17 | #include "generated/newtoys.h" |
landley | c562150 | 2006-09-28 17:18:51 -0400 | [diff] [blame] | 18 | }; |
| 19 | |
landley | 4f344e3 | 2006-10-05 16:18:03 -0400 | [diff] [blame] | 20 | #define TOY_LIST_LEN (sizeof(toy_list)/sizeof(struct toy_list)) |
| 21 | |
landley | c562150 | 2006-09-28 17:18:51 -0400 | [diff] [blame] | 22 | // global context for this applet. |
| 23 | |
| 24 | struct toy_context toys; |
Rob Landley | b1aaba1 | 2008-01-20 17:25:44 -0600 | [diff] [blame] | 25 | union global_union this; |
Rob Landley | 055cfcb | 2007-01-14 20:20:06 -0500 | [diff] [blame] | 26 | char toybuf[4096]; |
landley | c562150 | 2006-09-28 17:18:51 -0400 | [diff] [blame] | 27 | |
landley | 4f344e3 | 2006-10-05 16:18:03 -0400 | [diff] [blame] | 28 | struct toy_list *toy_find(char *name) |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 29 | { |
| 30 | int top, bottom, middle; |
| 31 | |
Rob Landley | 8f8c504 | 2012-01-14 23:28:15 -0600 | [diff] [blame] | 32 | // If the name starts with "toybox" accept that as a match. Otherwise |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 33 | // skip the first entry, which is out of order. |
| 34 | |
| 35 | if (!strncmp(name,"toybox",6)) return toy_list; |
landley | 4f344e3 | 2006-10-05 16:18:03 -0400 | [diff] [blame] | 36 | bottom = 1; |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 37 | |
| 38 | // Binary search to find this applet. |
| 39 | |
landley | 4f344e3 | 2006-10-05 16:18:03 -0400 | [diff] [blame] | 40 | top = TOY_LIST_LEN-1; |
| 41 | for (;;) { |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 42 | int result; |
Rob Landley | 2c22685 | 2007-11-15 18:30:30 -0600 | [diff] [blame] | 43 | |
landley | 4f344e3 | 2006-10-05 16:18:03 -0400 | [diff] [blame] | 44 | middle = (top+bottom)/2; |
| 45 | if (middle<bottom || middle>top) return NULL; |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 46 | result = strcmp(name,toy_list[middle].name); |
landley | 4f344e3 | 2006-10-05 16:18:03 -0400 | [diff] [blame] | 47 | if (!result) return toy_list+middle; |
| 48 | if (result<0) top=--middle; |
| 49 | else bottom = ++middle; |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 50 | } |
| 51 | } |
| 52 | |
Rob Landley | fc2224b | 2007-06-01 14:31:45 -0400 | [diff] [blame] | 53 | // Figure out whether or not anything is using the option parsing logic, |
| 54 | // 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] | 55 | // on its' own. NEED_OPTIONS becomes a constant allowing if() to optimize |
| 56 | // stuff out via dead code elimination. |
Rob Landley | fc2224b | 2007-06-01 14:31:45 -0400 | [diff] [blame] | 57 | |
| 58 | #undef NEWTOY |
| 59 | #undef OLDTOY |
| 60 | #define NEWTOY(name, opts, flags) opts || |
| 61 | #define OLDTOY(name, oldname, opts, flags) opts || |
Rob Landley | 4307a7b | 2007-06-07 15:20:26 -0400 | [diff] [blame] | 62 | static const int NEED_OPTIONS = |
Rob Landley | 55928b1 | 2008-01-19 17:43:27 -0600 | [diff] [blame] | 63 | #include "generated/newtoys.h" |
Rob Landley | fc2224b | 2007-06-01 14:31:45 -0400 | [diff] [blame] | 64 | 0; // Ends the opts || opts || opts... |
| 65 | |
Rob Landley | 8f8c504 | 2012-01-14 23:28:15 -0600 | [diff] [blame] | 66 | // Setup toybox global state for this command. |
| 67 | |
landley | cd9dfc3 | 2006-10-18 18:38:16 -0400 | [diff] [blame] | 68 | void toy_init(struct toy_list *which, char *argv[]) |
| 69 | { |
Rob Landley | e0377fb | 2010-01-05 12:17:05 -0600 | [diff] [blame] | 70 | // Drop permissions for non-suid commands. |
| 71 | |
| 72 | if (CFG_TOYBOX_SUID) { |
| 73 | uid_t uid = getuid(), euid = geteuid(); |
| 74 | |
| 75 | if (!(which->flags & TOYFLAG_STAYROOT)) { |
| 76 | if (uid != euid) xsetuid(euid=uid); |
| 77 | } else if (CFG_TOYBOX_DEBUG && uid) |
| 78 | error_exit("Not installed suid root"); |
| 79 | |
| 80 | if ((which->flags & TOYFLAG_NEEDROOT) && euid) |
| 81 | error_exit("Not root"); |
Rob Landley | e0377fb | 2010-01-05 12:17:05 -0600 | [diff] [blame] | 82 | } |
| 83 | |
Rob Landley | db037ef | 2010-01-06 05:29:17 -0600 | [diff] [blame] | 84 | // Free old toys contents (to be reentrant) |
| 85 | |
| 86 | if (toys.optargs != toys.argv+1) free(toys.optargs); |
Rob Landley | 2b54b1a | 2012-02-18 22:44:11 -0600 | [diff] [blame^] | 87 | memset(&toys, 0, sizeof(struct toy_context)); |
landley | cd9dfc3 | 2006-10-18 18:38:16 -0400 | [diff] [blame] | 88 | |
| 89 | toys.which = which; |
| 90 | toys.argv = argv; |
Rob Landley | fc2224b | 2007-06-01 14:31:45 -0400 | [diff] [blame] | 91 | if (NEED_OPTIONS && which->options) get_optflags(); |
Rob Landley | b841cd2 | 2007-06-01 13:41:24 -0400 | [diff] [blame] | 92 | else toys.optargs = argv+1; |
Rob Landley | 0f8c4c5 | 2008-02-12 19:05:44 -0600 | [diff] [blame] | 93 | if (which->flags & TOYFLAG_UMASK) toys.old_umask = umask(0); |
landley | cd9dfc3 | 2006-10-18 18:38:16 -0400 | [diff] [blame] | 94 | } |
| 95 | |
Rob Landley | 8f8c504 | 2012-01-14 23:28:15 -0600 | [diff] [blame] | 96 | // Like exec() but runs an internal toybox command instead of another file. |
| 97 | // Only returns if it can't find the command, otherwise exit() when done. |
landley | 4f344e3 | 2006-10-05 16:18:03 -0400 | [diff] [blame] | 98 | void toy_exec(char *argv[]) |
| 99 | { |
| 100 | struct toy_list *which; |
Rob Landley | b841cd2 | 2007-06-01 13:41:24 -0400 | [diff] [blame] | 101 | |
landley | 4f344e3 | 2006-10-05 16:18:03 -0400 | [diff] [blame] | 102 | which = toy_find(argv[0]); |
| 103 | if (!which) return; |
landley | cd9dfc3 | 2006-10-18 18:38:16 -0400 | [diff] [blame] | 104 | toy_init(which, argv); |
Rob Landley | efda21c | 2007-11-29 18:14:37 -0600 | [diff] [blame] | 105 | toys.which->toy_main(); |
| 106 | exit(toys.exitval); |
landley | 4f344e3 | 2006-10-05 16:18:03 -0400 | [diff] [blame] | 107 | } |
| 108 | |
Rob Landley | 8f8c504 | 2012-01-14 23:28:15 -0600 | [diff] [blame] | 109 | // Multiplexer command, first argument is command to run, rest are args to that. |
| 110 | // If first argument starts with - output list of command install paths. |
| 111 | |
Rob Landley | efda21c | 2007-11-29 18:14:37 -0600 | [diff] [blame] | 112 | void toybox_main(void) |
landley | 4f344e3 | 2006-10-05 16:18:03 -0400 | [diff] [blame] | 113 | { |
| 114 | static char *toy_paths[]={"usr/","bin/","sbin/",0}; |
| 115 | int i, len = 0; |
| 116 | |
| 117 | if (toys.argv[1]) { |
| 118 | if (toys.argv[1][0]!='-') { |
| 119 | toy_exec(toys.argv+1); |
Rob Landley | 841223d | 2008-01-22 15:33:50 -0600 | [diff] [blame] | 120 | toys.which = toy_list; |
Rob Landley | 860f263 | 2007-11-27 01:41:32 -0600 | [diff] [blame] | 121 | error_exit("Unknown command %s",toys.argv[1]); |
landley | 4f344e3 | 2006-10-05 16:18:03 -0400 | [diff] [blame] | 122 | } |
| 123 | } |
| 124 | |
| 125 | // Output list of applets. |
| 126 | for (i=1; i<TOY_LIST_LEN; i++) { |
| 127 | int fl = toy_list[i].flags; |
| 128 | if (fl & TOYMASK_LOCATION) { |
| 129 | if (toys.argv[1]) { |
| 130 | int j; |
| 131 | for (j=0; toy_paths[j]; j++) |
| 132 | if (fl & (1<<j)) len += printf("%s", toy_paths[j]); |
| 133 | } |
| 134 | len += printf("%s ",toy_list[i].name); |
| 135 | if (len>65) { |
| 136 | putchar('\n'); |
| 137 | len=0; |
| 138 | } |
| 139 | } |
| 140 | } |
| 141 | putchar('\n'); |
landley | 4f344e3 | 2006-10-05 16:18:03 -0400 | [diff] [blame] | 142 | } |
| 143 | |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 144 | int main(int argc, char *argv[]) |
| 145 | { |
Rob Landley | 5aab966 | 2007-01-18 22:00:46 -0500 | [diff] [blame] | 146 | // Artificial scope to eat less stack for things we call |
| 147 | { |
| 148 | char *name; |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 149 | |
Rob Landley | 8f8c504 | 2012-01-14 23:28:15 -0600 | [diff] [blame] | 150 | // Trim path off of command name |
Rob Landley | 7f28e68 | 2012-02-08 19:29:14 -0600 | [diff] [blame] | 151 | name = strrchr(argv[0], '/'); |
Rob Landley | 5aab966 | 2007-01-18 22:00:46 -0500 | [diff] [blame] | 152 | if (!name) name=argv[0]; |
| 153 | else name++; |
| 154 | argv[0] = name; |
| 155 | } |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 156 | |
Rob Landley | 8f8c504 | 2012-01-14 23:28:15 -0600 | [diff] [blame] | 157 | // Call the multiplexer, adjusting this argv[] to be its' argv[1]. |
| 158 | // (It will adjust it back before calling toy_exec().) |
landley | 4f344e3 | 2006-10-05 16:18:03 -0400 | [diff] [blame] | 159 | toys.argv = argv-1; |
Rob Landley | efda21c | 2007-11-29 18:14:37 -0600 | [diff] [blame] | 160 | toybox_main(); |
| 161 | return 0; |
landley | 13bab2f | 2006-09-27 00:45:05 -0400 | [diff] [blame] | 162 | } |