-/* vi: set ts=4 :*/
/* Toybox infrastructure.
*
* Copyright 2006 Rob Landley <rob@landley.net>
#include "generated/newtoys.h"
};
-#define TOY_LIST_LEN (sizeof(toy_list)/sizeof(struct toy_list))
-
-// global context for this applet.
+// global context for this command.
struct toy_context toys;
union global_union this;
-char toybuf[4096];
+char toybuf[4096], libbuf[4096];
struct toy_list *toy_find(char *name)
{
- int top, bottom, middle;
+ int top, bottom, middle;
- // If the name starts with "toybox", accept that as a match. Otherwise
- // skip the first entry, which is out of order.
+ // If the name starts with "toybox" accept that as a match. Otherwise
+ // skip the first entry, which is out of order.
- if (!strncmp(name,"toybox",6)) return toy_list;
- bottom = 1;
+ if (!strncmp(name,"toybox",6)) return toy_list;
+ bottom = 1;
- // Binary search to find this applet.
+ // Binary search to find this command.
- top = TOY_LIST_LEN-1;
- for (;;) {
- int result;
+ top = ARRAY_LEN(toy_list)-1;
+ for (;;) {
+ int result;
- middle = (top+bottom)/2;
- if (middle<bottom || middle>top) return NULL;
- result = strcmp(name,toy_list[middle].name);
- if (!result) return toy_list+middle;
- if (result<0) top=--middle;
- else bottom = ++middle;
- }
+ middle = (top+bottom)/2;
+ if (middle<bottom || middle>top) return NULL;
+ result = strcmp(name,toy_list[middle].name);
+ if (!result) return toy_list+middle;
+ if (result<0) top=--middle;
+ else bottom = ++middle;
+ }
}
// Figure out whether or not anything is using the option parsing logic,
// because the compiler can't figure out whether or not to optimize it away
-// on its' own.
+// on its' own. NEED_OPTIONS becomes a constant allowing if() to optimize
+// stuff out via dead code elimination.
#undef NEWTOY
#undef OLDTOY
#include "generated/newtoys.h"
0; // Ends the opts || opts || opts...
+// Subset of init needed by singlemain
+static void toy_singleinit(struct toy_list *which, char *argv[])
+{
+ toys.which = which;
+ toys.argv = argv;
+
+ if (CFG_TOYBOX_HELP_DASHDASH && argv[1] && !strcmp(argv[1], "--help")) {
+ if (toys.which == toy_list && toys.argv[2])
+ if (!(toys.which = toy_find(toys.argv[2]))) return;
+ show_help();
+ xexit();
+ }
+
+ if (NEED_OPTIONS && which->options) get_optflags();
+ else {
+ toys.optargs = argv+1;
+ for (toys.optc=0; toys.optargs[toys.optc]; toys.optc++);
+ }
+ toys.old_umask = umask(0);
+ if (!(which->flags & TOYFLAG_UMASK)) umask(toys.old_umask);
+}
+
+// Setup toybox global state for this command.
+
void toy_init(struct toy_list *which, char *argv[])
{
- // Free old toys contents here?
+ // Drop permissions for non-suid commands.
+
+ if (CFG_TOYBOX_SUID) {
+ uid_t uid = getuid(), euid = geteuid();
- toys.which = which;
- toys.argv = argv;
- if (NEED_OPTIONS && which->options) get_optflags();
- else toys.optargs = argv+1;
- if (which->flags & TOYFLAG_UMASK) toys.old_umask = umask(0);
+ if (!(which->flags & TOYFLAG_STAYROOT)) {
+ if (uid != euid)
+ if (!setuid(euid=uid)) perror_exit("setuid"); // drop root
+ } else if (CFG_TOYBOX_DEBUG && uid && which != toy_list)
+ error_msg("Not installed suid root");
+
+ if ((which->flags & TOYFLAG_NEEDROOT) && euid) error_exit("Not root");
+ }
+
+ // Free old toys contents (to be reentrant), but leave rebound if any
+
+ if (toys.optargs != toys.argv+1) free(toys.optargs);
+ memset(&toys, 0, offsetof(struct toy_context, rebound));
+
+ // Subset of init needed by singlemain.
+ toy_singleinit(which, argv);
}
-// Run a toy.
+// Like exec() but runs an internal toybox command instead of another file.
+// Only returns if it can't find the command, otherwise exit() when done.
void toy_exec(char *argv[])
{
- struct toy_list *which;
+ struct toy_list *which;
- which = toy_find(argv[0]);
- if (!which) return;
- toy_init(which, argv);
- toys.which->toy_main();
- exit(toys.exitval);
+ if (!(which = toy_find(argv[0]))) return;
+ toy_init(which, argv);
+ if (toys.which) toys.which->toy_main();
+ if (fflush(NULL) || ferror(stdout)) perror_exit("write");
+ xexit();
}
+// Multiplexer command, first argument is command to run, rest are args to that.
+// If first argument starts with - output list of command install paths.
+
void toybox_main(void)
{
- static char *toy_paths[]={"usr/","bin/","sbin/",0};
- int i, len = 0;
-
- if (toys.argv[1]) {
- if (toys.argv[1][0]!='-') {
- toy_exec(toys.argv+1);
- toys.which = toy_list;
- error_exit("Unknown command %s",toys.argv[1]);
- }
- }
-
- // Output list of applets.
- for (i=1; i<TOY_LIST_LEN; i++) {
- int fl = toy_list[i].flags;
- if (fl & TOYMASK_LOCATION) {
- if (toys.argv[1]) {
- int j;
- for (j=0; toy_paths[j]; j++)
- if (fl & (1<<j)) len += printf("%s", toy_paths[j]);
- }
- len += printf("%s ",toy_list[i].name);
- if (len>65) {
- putchar('\n');
- len=0;
- }
- }
- }
- putchar('\n');
+ static char *toy_paths[]={"usr/","bin/","sbin/",0};
+ int i, len = 0;
+
+ toys.which = toy_list;
+ if (toys.argv[1]) {
+ toys.optc = 0;
+ toy_exec(toys.argv+1);
+ if (toys.argv[1][0] == '-') goto list;
+
+ error_exit("Unknown command %s",toys.argv[1]);
+ }
+
+list:
+ // Output list of command.
+ for (i=1; i<ARRAY_LEN(toy_list); i++) {
+ int fl = toy_list[i].flags;
+ if (fl & TOYMASK_LOCATION) {
+ if (toys.argv[1]) {
+ int j;
+ for (j=0; toy_paths[j]; j++)
+ if (fl & (1<<j)) len += printf("%s", toy_paths[j]);
+ }
+ len += printf("%s ",toy_list[i].name);
+ if (len>65) {
+ xputc('\n');
+ len=0;
+ }
+ }
+ }
+ xputc('\n');
}
int main(int argc, char *argv[])
{
- // Artificial scope to eat less stack for things we call
- {
- char *name;
-
- // Figure out which applet to call.
- name = rindex(argv[0], '/');
- if (!name) name=argv[0];
- else name++;
- argv[0] = name;
- }
-
- toys.argv = argv-1;
- toybox_main();
- return 0;
+ if (CFG_TOYBOX_I18N) setlocale(LC_ALL, "");
+
+ toys.toycount = ARRAY_LEN(toy_list);
+
+ if (CFG_TOYBOX) {
+ // Trim path off of command name
+ *argv = basename(*argv);
+
+ // Call the multiplexer, adjusting this argv[] to be its' argv[1].
+ // (It will adjust it back before calling toy_exec().)
+ toys.argv = argv-1;
+ toybox_main();
+ } else {
+ // a single toybox command built standalone with no multiplexer
+ toy_singleinit(toy_list, argv);
+ toy_list->toy_main();
+ if (fflush(NULL) || ferror(stdout)) perror_exit("write");
+ }
+
+ return toys.exitval;
}
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