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if only one applet is enabled, make "busybox applet [params]" work as expected

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2010-11-29 02:55:35 +01:00
parent 714e2b7e6a
commit 8f0af3b001
1 changed files with 33 additions and 29 deletions
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62
libbb/appletlib.c
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@ -227,7 +227,7 @@ bool re_execed;
IF_FEATURE_SUID(static uid_t ruid;) /* real uid */ IF_FEATURE_SUID(static uid_t ruid;) /* real uid */
#if ENABLE_FEATURE_SUID_CONFIG # if ENABLE_FEATURE_SUID_CONFIG
/* applets[] is const, so we have to define this "override" structure */ /* applets[] is const, so we have to define this "override" structure */
static struct BB_suid_config { static struct BB_suid_config {
@ -498,15 +498,15 @@ static void parse_config_file(void)
sct_head = sct; sct_head = sct;
} }
} }
#else # else
static inline void parse_config_file(void) static inline void parse_config_file(void)
{ {
IF_FEATURE_SUID(ruid = getuid();) IF_FEATURE_SUID(ruid = getuid();)
} }
#endif /* FEATURE_SUID_CONFIG */ # endif /* FEATURE_SUID_CONFIG */
#if ENABLE_FEATURE_SUID # if ENABLE_FEATURE_SUID
static void check_suid(int applet_no) static void check_suid(int applet_no)
{ {
gid_t rgid; /* real gid */ gid_t rgid; /* real gid */
@ -515,7 +515,7 @@ static void check_suid(int applet_no)
return; /* run by root - no need to check more */ return; /* run by root - no need to check more */
rgid = getgid(); rgid = getgid();
#if ENABLE_FEATURE_SUID_CONFIG # if ENABLE_FEATURE_SUID_CONFIG
if (suid_cfg_readable) { if (suid_cfg_readable) {
uid_t uid; uid_t uid;
struct BB_suid_config *sct; struct BB_suid_config *sct;
@ -558,7 +558,7 @@ static void check_suid(int applet_no)
bb_perror_msg_and_die("setresuid"); bb_perror_msg_and_die("setresuid");
return; return;
} }
#if !ENABLE_FEATURE_SUID_CONFIG_QUIET # if !ENABLE_FEATURE_SUID_CONFIG_QUIET
{ {
static bool onetime = 0; static bool onetime = 0;
@ -567,9 +567,9 @@ static void check_suid(int applet_no)
fprintf(stderr, "Using fallback suid method\n"); fprintf(stderr, "Using fallback suid method\n");
} }
} }
#endif # endif
check_need_suid: check_need_suid:
#endif # endif
if (APPLET_SUID(applet_no) == _BB_SUID_REQUIRE) { if (APPLET_SUID(applet_no) == _BB_SUID_REQUIRE) {
/* Real uid is not 0. If euid isn't 0 too, suid bit /* Real uid is not 0. If euid isn't 0 too, suid bit
* is most probably not set on our executable */ * is most probably not set on our executable */
@ -580,25 +580,24 @@ static void check_suid(int applet_no)
xsetuid(ruid); xsetuid(ruid);
} }
} }
#else # else
#define check_suid(x) ((void)0) # define check_suid(x) ((void)0)
#endif /* FEATURE_SUID */ # endif /* FEATURE_SUID */
#if ENABLE_FEATURE_INSTALLER # if ENABLE_FEATURE_INSTALLER
static const char usr_bin [] ALIGN1 = "/usr/bin/"; static const char usr_bin [] ALIGN1 = "/usr/bin/";
static const char usr_sbin[] ALIGN1 = "/usr/sbin/"; static const char usr_sbin[] ALIGN1 = "/usr/sbin/";
static const char *const install_dir[] = { static const char *const install_dir[] = {
&usr_bin [8], /* "/" */ &usr_bin [8], /* "/" */
&usr_bin [4], /* "/bin/" */ &usr_bin [4], /* "/bin/" */
&usr_sbin[4] /* "/sbin/" */ &usr_sbin[4] /* "/sbin/" */
# if !ENABLE_INSTALL_NO_USR # if !ENABLE_INSTALL_NO_USR
,usr_bin ,usr_bin
,usr_sbin ,usr_sbin
# endif # endif
}; };
/* create (sym)links for each applet */ /* create (sym)links for each applet */
static void install_links(const char *busybox, int use_symbolic_links, static void install_links(const char *busybox, int use_symbolic_links,
char *custom_install_dir) char *custom_install_dir)
@ -628,9 +627,9 @@ static void install_links(const char *busybox, int use_symbolic_links,
free(fpc); free(fpc);
} }
} }
#else # else
# define install_links(x,y,z) ((void)0) # define install_links(x,y,z) ((void)0)
#endif # endif
/* If we were called as "busybox..." */ /* If we were called as "busybox..." */
static int busybox_main(char **argv) static int busybox_main(char **argv)
@ -695,10 +694,10 @@ static int busybox_main(char **argv)
const char *a = applet_names; const char *a = applet_names;
dup2(1, 2); dup2(1, 2);
while (*a) { while (*a) {
#if ENABLE_FEATURE_INSTALLER # if ENABLE_FEATURE_INSTALLER
if (argv[1][6]) /* --list-path? */ if (argv[1][6]) /* --list-path? */
full_write2_str(install_dir[APPLET_INSTALL_LOC(i)] + 1); full_write2_str(install_dir[APPLET_INSTALL_LOC(i)] + 1);
#endif # endif
full_write2_str(a); full_write2_str(a);
full_write2_str("\n"); full_write2_str("\n");
i++; i++;
@ -771,7 +770,7 @@ void FAST_FUNC run_applet_and_exit(const char *name, char **argv)
int applet = find_applet_by_name(name); int applet = find_applet_by_name(name);
if (applet >= 0) if (applet >= 0)
run_applet_no_and_exit(applet, argv); run_applet_no_and_exit(applet, argv);
if (!strncmp(name, "busybox", 7)) if (strncmp(name, "busybox", 7) == 0)
exit(busybox_main(argv)); exit(busybox_main(argv));
} }
@ -803,14 +802,6 @@ int main(int argc UNUSED_PARAM, char **argv)
mallopt(M_MMAP_THRESHOLD, 8 * PAGE_SIZE - 256); mallopt(M_MMAP_THRESHOLD, 8 * PAGE_SIZE - 256);
#endif #endif
#if defined(SINGLE_APPLET_MAIN)
/* Only one applet is selected by the user! */
/* applet_names in this case is just "applet\0\0" */
lbb_prepare(applet_names IF_FEATURE_INDIVIDUAL(, argv));
return SINGLE_APPLET_MAIN(argc, argv);
#else
lbb_prepare("busybox" IF_FEATURE_INDIVIDUAL(, argv));
#if !BB_MMU #if !BB_MMU
/* NOMMU re-exec trick sets high-order bit in first byte of name */ /* NOMMU re-exec trick sets high-order bit in first byte of name */
if (argv[0][0] & 0x80) { if (argv[0][0] & 0x80) {
@ -818,6 +809,19 @@ int main(int argc UNUSED_PARAM, char **argv)
argv[0][0] &= 0x7f; argv[0][0] &= 0x7f;
} }
#endif #endif
#if defined(SINGLE_APPLET_MAIN)
/* Only one applet is selected in .config */
if (strncmp(argv[0], "busybox", 7) == 0) {
/* "busybox <applet> <params>" should still work as expected */
argv++;
}
/* applet_names in this case is just "applet\0\0" */
lbb_prepare(applet_names IF_FEATURE_INDIVIDUAL(, argv));
return SINGLE_APPLET_MAIN(argc, argv);
#else
lbb_prepare("busybox" IF_FEATURE_INDIVIDUAL(, argv));
applet_name = argv[0]; applet_name = argv[0];
if (applet_name[0] == '-') if (applet_name[0] == '-')
applet_name++; applet_name++;