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Diffstat (limited to 'applets/applets.c')
-rw-r--r--applets/applets.c272
1 files changed, 128 insertions, 144 deletions
diff --git a/applets/applets.c b/applets/applets.c
index 21b0c3d..bf6b160 100644
--- a/applets/applets.c
+++ b/applets/applets.c
@@ -54,10 +54,6 @@ static struct BB_applet *applet_using;
const size_t NUM_APPLETS = (sizeof (applets) / sizeof (struct BB_applet) - 1);
-#ifdef CONFIG_FEATURE_SUID
-
-static void check_suid (struct BB_applet *app);
-
#ifdef CONFIG_FEATURE_SUID_CONFIG
#include <sys/stat.h>
@@ -65,8 +61,6 @@ static void check_suid (struct BB_applet *app);
#include "pwd_.h"
#include "grp_.h"
-static void parse_config_file (void);
-
#define CONFIG_FILE "/etc/busybox.conf"
/* applets [] is const, so we have to define this "override" structure */
@@ -79,77 +73,12 @@ struct BB_suid_config
mode_t m_mode;
struct BB_suid_config *m_next;
-};
+} static *suid_config;
-static struct BB_suid_config *suid_config;
static int suid_cfg_readable;
-#endif /* CONFIG_FEATURE_SUID_CONFIG */
-
-#endif /* CONFIG_FEATURE_SUID */
-
-
-
-extern void bb_show_usage (void)
-{
- const char *format_string;
- const char *usage_string = usage_messages;
- int i;
-
- for (i = applet_using - applets; i > 0;) {
- if (!*usage_string++) {
- --i;
- }
- }
-
- format_string = "%s\n\nUsage: %s %s\n\n";
- if (*usage_string == '\b')
- format_string = "%s\n\nNo help available.\n\n";
- fprintf (stderr, format_string, bb_msg_full_version, applet_using->name,
- usage_string);
-
- exit (EXIT_FAILURE);
-}
-
-static int applet_name_compare (const void *x, const void *y)
-{
- const char *name = x;
- const struct BB_applet *applet = y;
-
- return strcmp (name, applet->name);
-}
-
-extern const size_t NUM_APPLETS;
-
-struct BB_applet *find_applet_by_name (const char *name)
-{
- return bsearch (name, applets, NUM_APPLETS, sizeof (struct BB_applet),
- applet_name_compare);
-}
-
-void run_applet_by_name (const char *name, int argc, char **argv)
-{
- if(ENABLE_FEATURE_SUID_CONFIG) parse_config_file ();
-
- if(!strncmp(name, "busybox", 7)) busybox_main(argc, argv);
- /* Do a binary search to find the applet entry given the name. */
- applet_using = find_applet_by_name(name);
- if(applet_using) {
- bb_applet_name = applet_using->name;
- if(argc==2 && !strcmp(argv[1], "--help")) bb_show_usage ();
- if(ENABLE_FEATURE_SUID) check_suid (applet_using);
- exit ((*(applet_using->main)) (argc, argv));
- }
-}
-
-
-#ifdef CONFIG_FEATURE_SUID
-
-#ifdef CONFIG_FEATURE_SUID_CONFIG
-
/* check if u is member of group g */
-static int
-ingroup (uid_t u, gid_t g)
+static int ingroup (uid_t u, gid_t g)
{
struct group *grp = getgrgid (g);
@@ -166,76 +95,6 @@ ingroup (uid_t u, gid_t g)
return 0;
}
-#endif
-
-
-void
-check_suid (struct BB_applet *applet)
-{
- uid_t ruid = getuid (); /* real [ug]id */
- uid_t rgid = getgid ();
-
-#ifdef CONFIG_FEATURE_SUID_CONFIG
- if (suid_cfg_readable) {
- struct BB_suid_config *sct;
-
- for (sct = suid_config; sct; sct = sct->m_next) {
- if (sct->m_applet == applet)
- break;
- }
- if (sct) {
- mode_t m = sct->m_mode;
-
- if (sct->m_uid == ruid) /* same uid */
- m >>= 6;
- else if ((sct->m_gid == rgid) || ingroup (ruid, sct->m_gid)) /* same group / in group */
- m >>= 3;
-
- if (!(m & S_IXOTH)) /* is x bit not set ? */
- bb_error_msg_and_die ("You have no permission to run this applet!");
-
- if ((sct->m_mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) { /* *both* have to be set for sgid */
- if (setegid (sct->m_gid))
- bb_error_msg_and_die
- ("BusyBox binary has insufficient rights to set proper GID for applet!");
- } else
- setgid (rgid); /* no sgid -> drop */
-
- if (sct->m_mode & S_ISUID) {
- if (seteuid (sct->m_uid))
- bb_error_msg_and_die
- ("BusyBox binary has insufficient rights to set proper UID for applet!");
- } else
- setuid (ruid); /* no suid -> drop */
- } else {
- /* default: drop all priviledges */
- setgid (rgid);
- setuid (ruid);
- }
- return;
- } else {
-#ifndef CONFIG_FEATURE_SUID_CONFIG_QUIET
- static int onetime = 0;
-
- if (!onetime) {
- onetime = 1;
- fprintf (stderr, "Using fallback suid method\n");
- }
-#endif
- }
-#endif
-
- if (applet->need_suid == _BB_SUID_ALWAYS) {
- if (geteuid () != 0)
- bb_error_msg_and_die ("This applet requires root priviledges!");
- } else if (applet->need_suid == _BB_SUID_NEVER) {
- setgid (rgid); /* drop all priviledges */
- setuid (ruid);
- }
-}
-
-#ifdef CONFIG_FEATURE_SUID_CONFIG
-
/* This should probably be a libbb routine. In that case,
* I'd probably rename it to something like bb_trimmed_slice.
*/
@@ -470,10 +329,135 @@ static void parse_config_file(void)
return;
}
-#endif
+#else
+#define parse_config_file(x)
+#endif /* CONFIG_FEATURE_SUID_CONFIG */
+
+#ifdef CONFIG_FEATURE_SUID
+static void check_suid (struct BB_applet *applet)
+{
+ uid_t ruid = getuid (); /* real [ug]id */
+ uid_t rgid = getgid ();
+
+#ifdef CONFIG_FEATURE_SUID_CONFIG
+ if (suid_cfg_readable) {
+ struct BB_suid_config *sct;
+
+ for (sct = suid_config; sct; sct = sct->m_next) {
+ if (sct->m_applet == applet)
+ break;
+ }
+ if (sct) {
+ mode_t m = sct->m_mode;
+
+ if (sct->m_uid == ruid) /* same uid */
+ m >>= 6;
+ else if ((sct->m_gid == rgid) || ingroup (ruid, sct->m_gid)) /* same group / in group */
+ m >>= 3;
+
+ if (!(m & S_IXOTH)) /* is x bit not set ? */
+ bb_error_msg_and_die ("You have no permission to run this applet!");
+ if ((sct->m_mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) { /* *both* have to be set for sgid */
+ if (setegid (sct->m_gid))
+ bb_error_msg_and_die
+ ("BusyBox binary has insufficient rights to set proper GID for applet!");
+ } else
+ setgid (rgid); /* no sgid -> drop */
+
+ if (sct->m_mode & S_ISUID) {
+ if (seteuid (sct->m_uid))
+ bb_error_msg_and_die
+ ("BusyBox binary has insufficient rights to set proper UID for applet!");
+ } else
+ setuid (ruid); /* no suid -> drop */
+ } else {
+ /* default: drop all priviledges */
+ setgid (rgid);
+ setuid (ruid);
+ }
+ return;
+ } else {
+#ifndef CONFIG_FEATURE_SUID_CONFIG_QUIET
+ static int onetime = 0;
+
+ if (!onetime) {
+ onetime = 1;
+ fprintf (stderr, "Using fallback suid method\n");
+ }
+#endif
+ }
#endif
+ if (applet->need_suid == _BB_SUID_ALWAYS) {
+ if (geteuid () != 0)
+ bb_error_msg_and_die ("This applet requires root priviledges!");
+ } else if (applet->need_suid == _BB_SUID_NEVER) {
+ setgid (rgid); /* drop all priviledges */
+ setuid (ruid);
+ }
+}
+#else
+#define check_suid(x)
+#endif /* CONFIG_FEATURE_SUID */
+
+
+
+
+
+extern void bb_show_usage (void)
+{
+ const char *format_string;
+ const char *usage_string = usage_messages;
+ int i;
+
+ for (i = applet_using - applets; i > 0;) {
+ if (!*usage_string++) {
+ --i;
+ }
+ }
+
+ format_string = "%s\n\nUsage: %s %s\n\n";
+ if (*usage_string == '\b')
+ format_string = "%s\n\nNo help available.\n\n";
+ fprintf (stderr, format_string, bb_msg_full_version, applet_using->name,
+ usage_string);
+
+ exit (EXIT_FAILURE);
+}
+
+static int applet_name_compare (const void *x, const void *y)
+{
+ const char *name = x;
+ const struct BB_applet *applet = y;
+
+ return strcmp (name, applet->name);
+}
+
+extern const size_t NUM_APPLETS;
+
+struct BB_applet *find_applet_by_name (const char *name)
+{
+ return bsearch (name, applets, NUM_APPLETS, sizeof (struct BB_applet),
+ applet_name_compare);
+}
+
+void run_applet_by_name (const char *name, int argc, char **argv)
+{
+ if(ENABLE_FEATURE_SUID_CONFIG) parse_config_file ();
+
+ if(!strncmp(name, "busybox", 7)) busybox_main(argc, argv);
+ /* Do a binary search to find the applet entry given the name. */
+ applet_using = find_applet_by_name(name);
+ if(applet_using) {
+ bb_applet_name = applet_using->name;
+ if(argc==2 && !strcmp(argv[1], "--help")) bb_show_usage ();
+ if(ENABLE_FEATURE_SUID) check_suid (applet_using);
+ exit ((*(applet_using->main)) (argc, argv));
+ }
+}
+
+
/* END CODE */
/*
Local Variables:
generated by cgit v1.1 at 2024-12-26 08:10:34 +0000