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authorNatanael Copa <ncopa@alpinelinux.org>2012-01-30 20:43:30 +0000
committerNatanael Copa <ncopa@alpinelinux.org>2012-01-30 20:49:18 +0000
commitfaf0db0bf41968d4ca06541a0d0e7f4924cf87dd (patch)
treebd4731559af71cffab6ac5254fa23a6864ef8ec1 /main/busybox/bbsuid.c
parentead17333788dd3d2f10668267546ace81089103a (diff)
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main/busybox: bbsuid mount/umount. fix for mdev and acpid
- move sources into the aports tree. pointless shipping it separate - add mount/umount - add patch for mdev from upstream - backport acpid patch http://lists.busybox.net/pipermail/busybox/2012-January/077136.html
Diffstat (limited to 'main/busybox/bbsuid.c')
-rw-r--r--main/busybox/bbsuid.c105
1 files changed, 105 insertions, 0 deletions
diff --git a/main/busybox/bbsuid.c b/main/busybox/bbsuid.c
new file mode 100644
index 0000000000..a970b01e71
--- /dev/null
+++ b/main/busybox/bbsuid.c
@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2008 Natanael Copa <natanael.copa@gmail.com>
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation. See http://www.gnu.org/ for details.
+ *
+ */
+
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include <libgen.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define BBSUID_PATH "/bin/bbsuid"
+
+const static char * applets[] = {
+ "/bin/mount",
+ "/bin/ping",
+ "/bin/umount",
+ "/usr/bin/crontab",
+ "/usr/bin/passwd",
+ "/usr/bin/su",
+ "/usr/bin/traceroute",
+ NULL
+};
+
+
+static const char *applet_from_path(const char *str)
+{
+ const char *p = strrchr(str, '/');
+ if (p == NULL)
+ p = str;
+ else
+ p++;
+ return p;
+}
+
+static int is_valid_applet(const char *str)
+{
+ int i;
+ for (i = 0; applets[i] != NULL; i++) {
+ const char *a = applet_from_path(applets[i]);
+ if (strcmp(applet_from_path(str), a) == 0)
+ return 1;
+ }
+ return 0;
+}
+
+int exec_busybox(const char *app, int argc, char **argv)
+{
+ char **newargv = malloc((argc + 2) * sizeof(char *));
+ int i;
+ newargv[0] = "/bin/busybox";
+ newargv[1] = (char *)app;
+ for (i = 1; i < argc; i++)
+ newargv[i+1] = argv[i];
+ newargv[argc+1] = NULL;
+ execv(newargv[0], newargv);
+ perror(newargv[0]);
+ free(newargv);
+ return 1;
+}
+
+static int install_links(void)
+{
+ int i, r = 0;
+ /* we don't want others than root to install the symlinks */
+ if (getuid() != 0)
+ errx(1, "Only root can install symlinks");
+
+ for (i = 0; applets[i] != NULL; i++) {
+ const char *a = applets[i];
+ struct stat st;
+ if (lstat(a, &st) == 0 && S_ISLNK(st.st_mode))
+ unlink(a);
+ if (symlink(BBSUID_PATH, a) < 0)
+ r++;
+ }
+
+ return r;
+}
+
+int main(int argc, char **argv)
+{
+ const char *app = applet_from_path(argv[0]);
+
+ if (strcmp(app, "bbsuid") == 0) {
+ if (argc == 2 && strcmp(argv[1], "--install") == 0)
+ return install_links();
+ errx(1, "Use --install to install symlinks");
+ }
+
+ if (is_valid_applet(app))
+ return exec_busybox(app, argc, argv);
+
+ errx(1, "%s is not a valid applet", app);
+ return 1;
+}
+