modprobe: use -q to silence

[platform/upstream/toybox.git] / main.c

diff --git a/main.c b/main.c
index 8218b0f..0738a17 100644 (file)
--- a/main.c
+++ b/main.c
@@ -5,12 +5,17 @@
 
 #include "toys.h"
 
+#ifndef TOYBOX_VERSION
+#define TOYBOX_VERSION "0.6.0"
+#endif
+
 // Populate toy_list[].
 
 #undef NEWTOY
 #undef OLDTOY
 #define NEWTOY(name, opts, flags) {#name, name##_main, opts, flags},
-#define OLDTOY(name, oldname, opts, flags) {#name, oldname##_main, opts, flags},
+#define OLDTOY(name, oldname, flags) \
+  {#name, oldname##_main, OPTSTR_##oldname, flags},
 
 struct toy_list toy_list[] = {
 #include "generated/newtoys.h"
@@ -20,12 +25,14 @@ struct toy_list toy_list[] = {
 
 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;
 
+  if (!CFG_TOYBOX) return 0;
+
   // If the name starts with "toybox" accept that as a match.  Otherwise
   // skip the first entry, which is out of order.
 
@@ -55,7 +62,7 @@ struct toy_list *toy_find(char *name)
 #undef NEWTOY
 #undef OLDTOY
 #define NEWTOY(name, opts, flags) opts ||
-#define OLDTOY(name, oldname, opts, flags) opts ||
+#define OLDTOY(name, oldname, flags) OPTSTR_##oldname ||
 static const int NEED_OPTIONS =
 #include "generated/newtoys.h"
 0;  // Ends the opts || opts || opts...
@@ -66,8 +73,10 @@ static void toy_singleinit(struct toy_list *which, char *argv[])
   toys.which = which;
   toys.argv = argv;
 
+  if (CFG_TOYBOX_I18N) setlocale(LC_ALL, "C"+!!(which->flags & TOYFLAG_LOCALE));
+
   if (CFG_TOYBOX_HELP_DASHDASH && argv[1] && !strcmp(argv[1], "--help")) {
-    if (toys.which == toy_list && toys.argv[2])
+    if (CFG_TOYBOX && toys.which == toy_list && toys.argv[2])
       if (!(toys.which = toy_find(toys.argv[2]))) return;
     show_help();
     xexit();
@@ -80,6 +89,8 @@ static void toy_singleinit(struct toy_list *which, char *argv[])
   }
   toys.old_umask = umask(0);
   if (!(which->flags & TOYFLAG_UMASK)) umask(toys.old_umask);
+  toys.signalfd--;
+  toys.toycount = ARRAY_LEN(toy_list);
 }
 
 // Setup toybox global state for this command.
@@ -92,32 +103,47 @@ void toy_init(struct toy_list *which, char *argv[])
     uid_t uid = getuid(), euid = geteuid();
 
     if (!(which->flags & TOYFLAG_STAYROOT)) {
-      if (uid != euid) xsetuid(euid=uid);
+      if (uid != euid) {
+        if (!setuid(uid)) perror_exit("setuid %d->%d", euid, uid); // drop root
+        else euid = uid;
+      }
     } 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");
+    if ((which->flags & TOYFLAG_NEEDROOT) && euid) {
+      toys.exithelp++;
+      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));
+  if (toys.recursion > 1) memset(&this, 0, sizeof(this));
 
   // Subset of init needed by singlemain.
   toy_singleinit(which, argv);
 }
 
 // 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.
+// Only returns if it can't run command internally, otherwise exit() when done.
 void toy_exec(char *argv[])
 {
   struct toy_list *which;
 
+  // Return if we can't find it, or need to re-exec to acquire root,
+  // or if stack depth is getting silly.
   if (!(which = toy_find(argv[0]))) return;
+  if (toys.recursion && (which->flags & TOYFLAG_ROOTONLY) && getuid()) return;
+  if (toys.recursion++ > 5) return;
+
+  // don't blank old optargs if our new argc lives in the old optargs.
+  if (argv>=toys.optargs && argv<=toys.optargs+toys.optc) toys.optargs = 0;
+
+  // Run command
   toy_init(which, argv);
   if (toys.which) toys.which->toy_main();
-  if (fflush(NULL) || ferror(stdout)) perror_exit("write");
   xexit();
 }
 
@@ -131,13 +157,18 @@ void toybox_main(void)
 
   toys.which = toy_list;
   if (toys.argv[1]) {
+    toys.optc = toys.recursion = 0;
     toy_exec(toys.argv+1);
-    if (toys.argv[1][0] == '-') goto list;
-    
-    error_exit("Unknown command %s",toys.argv[1]);
+    if (!strcmp("--version", toys.argv[1])) {
+      xputs(TOYBOX_VERSION);
+      xexit();
+    }
+    if (toys.argv[1][0] != '-') {
+      toys.exitval = 127;
+      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;
@@ -147,11 +178,9 @@ list:
         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;
-      }
+      len += printf("%s",toy_list[i].name);
+      if (++len > 65) len = 0;
+      xputc(len ? ' ' : '\n');
     }
   }
   xputc('\n');
@@ -159,9 +188,10 @@ list:
 
 int main(int argc, char *argv[])
 {
-  if (CFG_TOYBOX_I18N) setlocale(LC_ALL, "");
+  // We check our own stdout errors, disable sigpipe killer
+  signal(SIGPIPE, SIG_IGN);
 
-  if (!CFG_TOYBOX_SINGLE) {
+  if (CFG_TOYBOX) {
     // Trim path off of command name
     *argv = basename(*argv);
 
@@ -173,8 +203,7 @@ int main(int argc, char *argv[])
     // 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;
+  xexit();
 }