113bab2f09e9189c2b1e83ae37a1134108f9479clandley/* Toybox infrastructure. 213bab2f09e9189c2b1e83ae37a1134108f9479clandley * 313bab2f09e9189c2b1e83ae37a1134108f9479clandley * Copyright 2006 Rob Landley <rob@landley.net> 413bab2f09e9189c2b1e83ae37a1134108f9479clandley */ 513bab2f09e9189c2b1e83ae37a1134108f9479clandley 6c56215062c961402515daeef8330ed75cd94af29landley#include "toys.h" 7c56215062c961402515daeef8330ed75cd94af29landley 890afbad4c1f115d5363fe99eb797d2458cd298a0Rob Landley#ifndef TOYBOX_VERSION 95af26a03df96cdea056440355713182cab4a4242Rob Landley#ifndef TOYBOX_VENDOR 105af26a03df96cdea056440355713182cab4a4242Rob Landley#define TOYBOX_VENDOR "" 115af26a03df96cdea056440355713182cab4a4242Rob Landley#endif 12c0ad4545137107503d64c7ed1d9bc685ec2f8e9cRob Landley#define TOYBOX_VERSION "0.7.6"TOYBOX_VENDOR 1390afbad4c1f115d5363fe99eb797d2458cd298a0Rob Landley#endif 14ad602aa127e44eade76fbb05fd27ee8f5825282aRob Landley 15f2311a42a0751e7c039981857fcf60b40f36b475Rob Landley// Populate toy_list[]. 16c56215062c961402515daeef8330ed75cd94af29landley 17a6d696b74adb08d83b21f8299b5443f31a5f43ecRob Landley#undef NEWTOY 18a6d696b74adb08d83b21f8299b5443f31a5f43ecRob Landley#undef OLDTOY 19ec0b482e9fd27cb994b30e0f1b8a4d39a85735ccRob Landley#define NEWTOY(name, opts, flags) {#name, name##_main, OPTSTR_##name, flags}, 20f3e56f4e4ff773de95fa2c9daf979734d826fc33Rob Landley#define OLDTOY(name, oldname, flags) \ 21f3e56f4e4ff773de95fa2c9daf979734d826fc33Rob Landley {#name, oldname##_main, OPTSTR_##oldname, flags}, 22a6d696b74adb08d83b21f8299b5443f31a5f43ecRob Landley 23c56215062c961402515daeef8330ed75cd94af29landleystruct toy_list toy_list[] = { 2455928b1e0a08d84a5cbc50020f0a8c1024f5b6ceRob Landley#include "generated/newtoys.h" 25c56215062c961402515daeef8330ed75cd94af29landley}; 26c56215062c961402515daeef8330ed75cd94af29landley 27933919cd8094e870b3e7a554605fd49b20ddb1e0Rob Landley// global context for this command. 28c56215062c961402515daeef8330ed75cd94af29landley 29c56215062c961402515daeef8330ed75cd94af29landleystruct toy_context toys; 30b1aaba1fc8176ac0b7c202a664d2554aa0967116Rob Landleyunion global_union this; 318fdcfdb4479dff7a993a25a63253f0e749fd99feRob Landleychar toybuf[4096], libbuf[4096]; 32c56215062c961402515daeef8330ed75cd94af29landley 334f344e356d2c36c4b1df46917eaef25f82ca79a9landleystruct toy_list *toy_find(char *name) 3413bab2f09e9189c2b1e83ae37a1134108f9479clandley{ 357aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley int top, bottom, middle; 3613bab2f09e9189c2b1e83ae37a1134108f9479clandley 37dc1af185e73410c5cad997c600678c212262a13cRob Landley if (!CFG_TOYBOX) return 0; 38dc1af185e73410c5cad997c600678c212262a13cRob Landley 397aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley // If the name starts with "toybox" accept that as a match. Otherwise 407aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley // skip the first entry, which is out of order. 4113bab2f09e9189c2b1e83ae37a1134108f9479clandley 427aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley if (!strncmp(name,"toybox",6)) return toy_list; 437aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley bottom = 1; 4413bab2f09e9189c2b1e83ae37a1134108f9479clandley 45933919cd8094e870b3e7a554605fd49b20ddb1e0Rob Landley // Binary search to find this command. 4613bab2f09e9189c2b1e83ae37a1134108f9479clandley 477aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley top = ARRAY_LEN(toy_list)-1; 487aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley for (;;) { 497aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley int result; 502c226859cfc911c4a1eea009897050a16714aeecRob Landley 517aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley middle = (top+bottom)/2; 527aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley if (middle<bottom || middle>top) return NULL; 537aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley result = strcmp(name,toy_list[middle].name); 547aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley if (!result) return toy_list+middle; 5577f9c7700604127f9e9f46d44764ca3db978f706Joyounger if (result<0) top = --middle; 567aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley else bottom = ++middle; 577aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley } 5813bab2f09e9189c2b1e83ae37a1134108f9479clandley} 5913bab2f09e9189c2b1e83ae37a1134108f9479clandley 60fc2224b26c73198d00eba714caf47bd2e3a5e63bRob Landley// Figure out whether or not anything is using the option parsing logic, 61fc2224b26c73198d00eba714caf47bd2e3a5e63bRob Landley// because the compiler can't figure out whether or not to optimize it away 628f8c504e585b6850abf628cabdb9ef231bef1a35Rob Landley// on its' own. NEED_OPTIONS becomes a constant allowing if() to optimize 638f8c504e585b6850abf628cabdb9ef231bef1a35Rob Landley// stuff out via dead code elimination. 64fc2224b26c73198d00eba714caf47bd2e3a5e63bRob Landley 65fc2224b26c73198d00eba714caf47bd2e3a5e63bRob Landley#undef NEWTOY 66fc2224b26c73198d00eba714caf47bd2e3a5e63bRob Landley#undef OLDTOY 67fc2224b26c73198d00eba714caf47bd2e3a5e63bRob Landley#define NEWTOY(name, opts, flags) opts || 68f3e56f4e4ff773de95fa2c9daf979734d826fc33Rob Landley#define OLDTOY(name, oldname, flags) OPTSTR_##oldname || 694307a7b07cec4ad8cbab47a29ba941f8cb041812Rob Landleystatic const int NEED_OPTIONS = 7055928b1e0a08d84a5cbc50020f0a8c1024f5b6ceRob Landley#include "generated/newtoys.h" 71fc2224b26c73198d00eba714caf47bd2e3a5e63bRob Landley0; // Ends the opts || opts || opts... 72fc2224b26c73198d00eba714caf47bd2e3a5e63bRob Landley 7329e75d51d447c5c0aae9834f5988b79a945c7accRob Landleystatic void unknown(char *name) 7429e75d51d447c5c0aae9834f5988b79a945c7accRob Landley{ 7529e75d51d447c5c0aae9834f5988b79a945c7accRob Landley toys.exitval = 127; 76b2574799d14e45ad1b43e8dfd1099fd8cf9b5420Rob Landley toys.which = toy_list; 7729e75d51d447c5c0aae9834f5988b79a945c7accRob Landley error_exit("Unknown command %s", name); 7829e75d51d447c5c0aae9834f5988b79a945c7accRob Landley} 7929e75d51d447c5c0aae9834f5988b79a945c7accRob Landley 803b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley// Setup toybox global state for this command. 81bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landleystatic void toy_singleinit(struct toy_list *which, char *argv[]) 82bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley{ 83bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley toys.which = which; 84bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley toys.argv = argv; 85bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley 86b5e405ce448fd50988346cc42a9099a5fdbafe8dRob Landley if (CFG_TOYBOX_I18N) setlocale(LC_CTYPE, "C.UTF-8"); 87fc49761a9c992a120a27cca016d6a3ed31b1f3d3Rob Landley 8829e75d51d447c5c0aae9834f5988b79a945c7accRob Landley // Parse --help and --version for (almost) all commands 8929e75d51d447c5c0aae9834f5988b79a945c7accRob Landley if (CFG_TOYBOX_HELP_DASHDASH && !(which->flags & TOYFLAG_NOHELP) && argv[1]) { 9029e75d51d447c5c0aae9834f5988b79a945c7accRob Landley if (!strcmp(argv[1], "--help")) { 9129e75d51d447c5c0aae9834f5988b79a945c7accRob Landley if (CFG_TOYBOX && toys.which == toy_list && toys.argv[2]) 9229e75d51d447c5c0aae9834f5988b79a945c7accRob Landley if (!(toys.which = toy_find(toys.argv[2]))) unknown(toys.argv[2]); 9329e75d51d447c5c0aae9834f5988b79a945c7accRob Landley show_help(stdout); 9429e75d51d447c5c0aae9834f5988b79a945c7accRob Landley xexit(); 9529e75d51d447c5c0aae9834f5988b79a945c7accRob Landley } 9629e75d51d447c5c0aae9834f5988b79a945c7accRob Landley 9729e75d51d447c5c0aae9834f5988b79a945c7accRob Landley if (!strcmp(argv[1], "--version")) { 9829e75d51d447c5c0aae9834f5988b79a945c7accRob Landley xputs("toybox "TOYBOX_VERSION); 9929e75d51d447c5c0aae9834f5988b79a945c7accRob Landley xexit(); 10029e75d51d447c5c0aae9834f5988b79a945c7accRob Landley } 101bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley } 102bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley 103bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley if (NEED_OPTIONS && which->options) get_optflags(); 104bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley else { 105bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley toys.optargs = argv+1; 1063b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley for (toys.optc = 0; toys.optargs[toys.optc]; toys.optc++); 107bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley } 108bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley toys.old_umask = umask(0); 109bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley if (!(which->flags & TOYFLAG_UMASK)) umask(toys.old_umask); 1101bc522424f6bb21842366ccd11953136436b684bRob Landley toys.signalfd--; 11190b200cac621ee925476297a2b70ddf3101cbb45Rob Landley toys.toycount = ARRAY_LEN(toy_list); 112bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley} 113bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley 1143b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley// Full init needed by multiplexer or reentrant calls, calls singleinit at end 115cd9dfc3b7b73715840b63180e2e4bfdb6e7ca9a4landleyvoid toy_init(struct toy_list *which, char *argv[]) 116cd9dfc3b7b73715840b63180e2e4bfdb6e7ca9a4landley{ 117ca311f1a41a579a57076adfeb2cc08b20dbca21aRob Landley void *oldwhich = toys.which; 118ca311f1a41a579a57076adfeb2cc08b20dbca21aRob Landley 1197aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley // Drop permissions for non-suid commands. 120e0377fb294821a68112d4da09f836ac42e3d5956Rob Landley 1217aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley if (CFG_TOYBOX_SUID) { 122ca311f1a41a579a57076adfeb2cc08b20dbca21aRob Landley if (!toys.which) toys.which = toy_list; 123ca311f1a41a579a57076adfeb2cc08b20dbca21aRob Landley 1247aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley uid_t uid = getuid(), euid = geteuid(); 125e0377fb294821a68112d4da09f836ac42e3d5956Rob Landley 1267aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley if (!(which->flags & TOYFLAG_STAYROOT)) { 1275c87c1426b5c99dd1f2a3ac7493996c342efef4eRob Landley if (uid != euid) { 12862b53ed9e64e40d2534f1239c4b314d84e79f15fPatrick Ohly if (setuid(uid)) perror_exit("setuid %d->%d", euid, uid); // drop root 129ca311f1a41a579a57076adfeb2cc08b20dbca21aRob Landley euid = uid; 130ca311f1a41a579a57076adfeb2cc08b20dbca21aRob Landley toys.wasroot++; 1315c87c1426b5c99dd1f2a3ac7493996c342efef4eRob Landley } 132bf1e70f3554c2f591e15df7abca03138861e5c6cRob Landley } else if (CFG_TOYBOX_DEBUG && uid && which != toy_list) 133bf1e70f3554c2f591e15df7abca03138861e5c6cRob Landley error_msg("Not installed suid root"); 134e0377fb294821a68112d4da09f836ac42e3d5956Rob Landley 135e5354ca12a232b3f97726214254a868771cb70d1Rob Landley if ((which->flags & TOYFLAG_NEEDROOT) && euid) help_exit("Not root"); 1367aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley } 137e0377fb294821a68112d4da09f836ac42e3d5956Rob Landley 138caf39c26827f355c4e107f55c5c51f67c484bfd7Rob Landley // Free old toys contents (to be reentrant), but leave rebound if any 1393b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley // don't blank old optargs if our new argc lives in the old optargs. 1403b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley if (argv<toys.optargs || argv>toys.optargs+toys.optc) free(toys.optargs); 141caf39c26827f355c4e107f55c5c51f67c484bfd7Rob Landley memset(&toys, 0, offsetof(struct toy_context, rebound)); 142ca311f1a41a579a57076adfeb2cc08b20dbca21aRob Landley if (oldwhich) memset(&this, 0, sizeof(this)); 143cd9dfc3b7b73715840b63180e2e4bfdb6e7ca9a4landley 1443b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley // Continue to portion of init needed by standalone commands 145bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley toy_singleinit(which, argv); 146cd9dfc3b7b73715840b63180e2e4bfdb6e7ca9a4landley} 147cd9dfc3b7b73715840b63180e2e4bfdb6e7ca9a4landley 1488f8c504e585b6850abf628cabdb9ef231bef1a35Rob Landley// Like exec() but runs an internal toybox command instead of another file. 149c6705af4231b8071830721f98021d0e79223da12Rob Landley// Only returns if it can't run command internally, otherwise exit() when done. 1504f344e356d2c36c4b1df46917eaef25f82ca79a9landleyvoid toy_exec(char *argv[]) 15113bab2f09e9189c2b1e83ae37a1134108f9479clandley{ 1527aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley struct toy_list *which; 153b841cd2f8c1b378c1e8d73f5915662b8e79aac80Rob Landley 1543b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley // Return if we can't find it (which includes no multiplexer case), 1553b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley if (!(which = toy_find(*argv))) return; 156c6705af4231b8071830721f98021d0e79223da12Rob Landley 1573b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley // Return if stack depth getting noticeable (proxy for leaked heap, etc). 158869da8ce3752ce6f5aa63d302eebe60a2b5c8da8Rob Landley 159869da8ce3752ce6f5aa63d302eebe60a2b5c8da8Rob Landley // Compiler writers have decided subtracting char * is undefined behavior, 160869da8ce3752ce6f5aa63d302eebe60a2b5c8da8Rob Landley // so convert to integers. (LP64 says sizeof(long)==sizeof(pointer).) 1614e756d7f9fd1b32b545ce8c43120dc733653b52fRob Landley if (!CFG_TOYBOX_NORECURSE) 1624e756d7f9fd1b32b545ce8c43120dc733653b52fRob Landley if (toys.stacktop && labs((long)toys.stacktop-(long)&which)>6000) return; 1633b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley 1643b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley // Return if we need to re-exec to acquire root via suid bit. 165ca311f1a41a579a57076adfeb2cc08b20dbca21aRob Landley if (toys.which && (which->flags&TOYFLAG_ROOTONLY) && toys.wasroot) return; 1667c5ed1cedaa881fff52da019da96f9bf6735dc5dRob Landley 167c6705af4231b8071830721f98021d0e79223da12Rob Landley // Run command 1687aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley toy_init(which, argv); 1695f80533836c60a167f69b71624fad5c494057ee2Rob Landley if (toys.which) toys.which->toy_main(); 170953722e3826c779f261a4c8a3649e36b1333a86fRob Landley xexit(); 1714f344e356d2c36c4b1df46917eaef25f82ca79a9landley} 17213bab2f09e9189c2b1e83ae37a1134108f9479clandley 1738f8c504e585b6850abf628cabdb9ef231bef1a35Rob Landley// Multiplexer command, first argument is command to run, rest are args to that. 1748f8c504e585b6850abf628cabdb9ef231bef1a35Rob Landley// If first argument starts with - output list of command install paths. 175efda21ca931766eed6cfc49d1b2122c53827d9fcRob Landleyvoid toybox_main(void) 1764f344e356d2c36c4b1df46917eaef25f82ca79a9landley{ 1777aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley static char *toy_paths[]={"usr/","bin/","sbin/",0}; 1787aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley int i, len = 0; 1797aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley 1803b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley // fast path: try to exec immediately. 1813b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley // (Leave toys.which null to disable suid return logic.) 1823b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley if (toys.argv[1]) toy_exec(toys.argv+1); 1833b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley 1843b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley // For early error reporting 1856c62448f72ed9fc2b6a59ee09735283c07060cdbRob Landley toys.which = toy_list; 1863b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley 18729e75d51d447c5c0aae9834f5988b79a945c7accRob Landley if (toys.argv[1] && toys.argv[1][0] != '-') unknown(toys.argv[1]); 1887aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley 189933919cd8094e870b3e7a554605fd49b20ddb1e0Rob Landley // Output list of command. 190e7acb4749dc655fee22d08f2723ea783f0d75fb6Rob Landley for (i=1; i<ARRAY_LEN(toy_list); i++) { 1917aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley int fl = toy_list[i].flags; 1927aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley if (fl & TOYMASK_LOCATION) { 1937aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley if (toys.argv[1]) { 1947aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley int j; 1957aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley for (j=0; toy_paths[j]; j++) 1967aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley if (fl & (1<<j)) len += printf("%s", toy_paths[j]); 1977aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley } 198d3f335d2cf64eb6c556ee5ba6e4a9315766e3c6eRob Landley len += printf("%s",toy_list[i].name); 199d3f335d2cf64eb6c556ee5ba6e4a9315766e3c6eRob Landley if (++len > 65) len = 0; 200d3f335d2cf64eb6c556ee5ba6e4a9315766e3c6eRob Landley xputc(len ? ' ' : '\n'); 2017aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley } 2027aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley } 2037aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley xputc('\n'); 2044f344e356d2c36c4b1df46917eaef25f82ca79a9landley} 2054f344e356d2c36c4b1df46917eaef25f82ca79a9landley 2064f344e356d2c36c4b1df46917eaef25f82ca79a9landleyint main(int argc, char *argv[]) 2074f344e356d2c36c4b1df46917eaef25f82ca79a9landley{ 2083b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley if (!*argv) return 127; 209e7c09548b9c6188857260064c8ceba03d850c4b7Rob Landley 2103b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley // Snapshot stack location so we can detect recursion depth later. 2113b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley // This is its own block so probe doesn't permanently consume stack. 2123b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley else { 2133b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley int stack; 2143b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley 2153b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley toys.stacktop = &stack; 2163b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley } 217cb49c305e3c78179b19d6f174ae73309544292b8Rob Landley *argv = getbasename(*argv); 2183b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley 21918cd02cc3e6529bcd3c8bcdf005e78925a320e35Elliott Hughes // Up to and including Android M, bionic's dynamic linker added a handler to 22018cd02cc3e6529bcd3c8bcdf005e78925a320e35Elliott Hughes // cause a crash dump on SIGPIPE. That was removed in Android N, but adbd 22118cd02cc3e6529bcd3c8bcdf005e78925a320e35Elliott Hughes // was still setting the SIGPIPE disposition to SIG_IGN, and its children 22218cd02cc3e6529bcd3c8bcdf005e78925a320e35Elliott Hughes // were inheriting that. In Android O, adbd is fixed, but manually asking 22318cd02cc3e6529bcd3c8bcdf005e78925a320e35Elliott Hughes // for the default disposition is harmless, and it'll be a long time before 22418cd02cc3e6529bcd3c8bcdf005e78925a320e35Elliott Hughes // no one's using anything older than O! 225e95731e93f569ec7266d78f01a43f8a5159d4968Rob Landley if (CFG_TOYBOX_ON_ANDROID) signal(SIGPIPE, SIG_DFL); 226e95731e93f569ec7266d78f01a43f8a5159d4968Rob Landley 2273b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley // If nommu can't fork, special reentry path. 2283b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley // Use !stacktop to signal "vfork happened", both before and after xexec() 2293b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley if (!CFG_TOYBOX_FORK) { 2303b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley if (0x80 & **argv) { 2313b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley **argv &= 0x7f; 2323b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley toys.stacktop = 0; 2333b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley } 2343b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley } 235bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley 2363b51a07e478d64a84e40b3a7c026b2f8566b194bRob Landley if (CFG_TOYBOX) { 237bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley // Call the multiplexer, adjusting this argv[] to be its' argv[1]. 238bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley // (It will adjust it back before calling toy_exec().) 239bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley toys.argv = argv-1; 240bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley toybox_main(); 241bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley } else { 242bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley // a single toybox command built standalone with no multiplexer 243bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley toy_singleinit(toy_list, argv); 244bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley toy_list->toy_main(); 245bb504f382dc6c596e6b2b9ce04931e7fbdd15bbeRob Landley } 2467aa651a6a4496d848f86de9b1e6b3a003256a01fRob Landley 247aad492fd87d689c443e87561c23abc2e12b785a9Rob Landley xexit(); 24813bab2f09e9189c2b1e83ae37a1134108f9479clandley} 249