main: free suid_config list after use
function old new delta run_applet_no_and_exit 438 450 +12 ifupdown_main 2147 2149 +2 writeFileToTarball 1325 1326 +1 pidof_main 244 245 +1 last_main 896 897 +1 grep_main 779 780 +1 find_list_entry2 121 122 +1 tar_main 835 833 -2 llist_unlink 28 26 -2 llist_rev 23 21 -2 main 791 782 -9 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 7/4 up/down: 19/-15) Total: 4 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
@@ -27,12 +27,13 @@
|
||||
* FEATURE_INSTALLER or FEATURE_SUID will still link printf routines in. :(
|
||||
*/
|
||||
#include "busybox.h"
|
||||
#include <assert.h>
|
||||
|
||||
#if !(defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) \
|
||||
|| defined(__APPLE__) \
|
||||
)
|
||||
# include <malloc.h> /* for mallopt */
|
||||
#endif
|
||||
|
||||
/* Try to pull in PAGE_SIZE */
|
||||
#ifdef __linux__
|
||||
# include <sys/user.h>
|
||||
@@ -40,6 +41,9 @@
|
||||
#ifdef __GNU__ /* Hurd */
|
||||
# include <mach/vm_param.h>
|
||||
#endif
|
||||
#ifndef PAGE_SIZE
|
||||
# define PAGE_SIZE (4*1024) /* guess */
|
||||
#endif
|
||||
|
||||
|
||||
/* Declare <applet>_main() */
|
||||
@@ -47,7 +51,6 @@
|
||||
#include "applets.h"
|
||||
#undef PROTOTYPES
|
||||
|
||||
|
||||
/* Include generated applet names, pointers to <applet>_main, etc */
|
||||
#include "applet_tables.h"
|
||||
/* ...and if applet_tables generator says we have only one applet... */
|
||||
@@ -58,9 +61,9 @@
|
||||
# define IF_FEATURE_INDIVIDUAL(...) __VA_ARGS__
|
||||
#endif
|
||||
|
||||
|
||||
#include "usage_compressed.h"
|
||||
|
||||
|
||||
#if ENABLE_SHOW_USAGE && !ENABLE_FEATURE_COMPRESS_USAGE
|
||||
static const char usage_messages[] ALIGN1 = UNPACKED_USAGE;
|
||||
#else
|
||||
@@ -233,12 +236,12 @@ IF_FEATURE_SUID(static uid_t ruid;) /* real uid */
|
||||
|
||||
# if ENABLE_FEATURE_SUID_CONFIG
|
||||
|
||||
/* applets[] is const, so we have to define this "override" structure */
|
||||
static struct BB_suid_config {
|
||||
int m_applet;
|
||||
static struct suid_config_t {
|
||||
/* next ptr must be first: this struct needs to be llist-compatible */
|
||||
struct suid_config_t *m_next;
|
||||
struct bb_uidgid_t m_ugid;
|
||||
int m_applet;
|
||||
mode_t m_mode;
|
||||
struct BB_suid_config *m_next;
|
||||
} *suid_config;
|
||||
|
||||
static bool suid_cfg_readable;
|
||||
@@ -247,13 +250,10 @@ static bool suid_cfg_readable;
|
||||
static int ingroup(uid_t u, gid_t g)
|
||||
{
|
||||
struct group *grp = getgrgid(g);
|
||||
|
||||
if (grp) {
|
||||
char **mem;
|
||||
|
||||
for (mem = grp->gr_mem; *mem; mem++) {
|
||||
struct passwd *pwd = getpwnam(*mem);
|
||||
|
||||
if (pwd && (pwd->pw_uid == u))
|
||||
return 1;
|
||||
}
|
||||
@@ -296,17 +296,12 @@ static const unsigned short mode_mask[] ALIGN2 = {
|
||||
|
||||
static void parse_config_file(void)
|
||||
{
|
||||
struct BB_suid_config *sct_head;
|
||||
struct BB_suid_config *sct;
|
||||
struct suid_config_t *sct_head;
|
||||
int applet_no;
|
||||
FILE *f;
|
||||
const char *errmsg;
|
||||
char *s;
|
||||
char *e;
|
||||
int i;
|
||||
unsigned lc;
|
||||
smallint section;
|
||||
char buffer[256];
|
||||
struct stat st;
|
||||
|
||||
ruid = getuid();
|
||||
@@ -327,9 +322,10 @@ static void parse_config_file(void)
|
||||
section = lc = 0;
|
||||
|
||||
while (1) {
|
||||
s = buffer;
|
||||
char buffer[256];
|
||||
char *s;
|
||||
|
||||
if (!fgets(s, sizeof(buffer), f)) { /* Are we done? */
|
||||
if (!fgets(buffer, sizeof(buffer), f)) { /* Are we done? */
|
||||
// Looks like bloat
|
||||
//if (ferror(f)) { /* Make sure it wasn't a read error. */
|
||||
// errmsg = "reading";
|
||||
@@ -340,6 +336,7 @@ static void parse_config_file(void)
|
||||
return;
|
||||
}
|
||||
|
||||
s = buffer;
|
||||
lc++; /* Got a (partial) line. */
|
||||
|
||||
/* If a line is too long for our buffer, we consider it an error.
|
||||
@@ -368,7 +365,7 @@ static void parse_config_file(void)
|
||||
/* Unlike the old code, we ignore leading and trailing
|
||||
* whitespace for the section name. We also require that
|
||||
* there are no stray characters after the closing bracket. */
|
||||
e = strchr(s, ']');
|
||||
char *e = strchr(s, ']');
|
||||
if (!e /* Missing right bracket? */
|
||||
|| e[1] /* Trailing characters? */
|
||||
|| !*(s = get_trimmed_slice(s+1, e)) /* Missing name? */
|
||||
@@ -399,7 +396,7 @@ static void parse_config_file(void)
|
||||
* where both key and value could contain inner whitespace. */
|
||||
|
||||
/* First get the key (an applet name in our case). */
|
||||
e = strchr(s, '=');
|
||||
char *e = strchr(s, '=');
|
||||
if (e) {
|
||||
s = get_trimmed_slice(s, e);
|
||||
}
|
||||
@@ -414,6 +411,9 @@ static void parse_config_file(void)
|
||||
* up when the busybox configuration is changed. */
|
||||
applet_no = find_applet_by_name(s);
|
||||
if (applet_no >= 0) {
|
||||
int i;
|
||||
struct suid_config_t *sct;
|
||||
|
||||
/* Note: We currently don't check for duplicates!
|
||||
* The last config line for each applet will be the
|
||||
* one used since we insert at the head of the list.
|
||||
@@ -453,7 +453,7 @@ static void parse_config_file(void)
|
||||
goto pe_label;
|
||||
}
|
||||
|
||||
*e++ = ':'; /* get_uidgid doesn't understand user.group */
|
||||
*e = ':'; /* get_uidgid doesn't understand user.group */
|
||||
if (get_uidgid(&sct->m_ugid, s, /*allow_numeric:*/ 1) == 0) {
|
||||
errmsg = "unknown user/group";
|
||||
goto pe_label;
|
||||
@@ -477,15 +477,11 @@ static void parse_config_file(void)
|
||||
} /* while (1) */
|
||||
|
||||
pe_label:
|
||||
fclose(f);
|
||||
bb_error_msg("parse error in %s, line %u: %s", config_file, lc, errmsg);
|
||||
|
||||
fclose(f);
|
||||
/* Release any allocated memory before returning. */
|
||||
while (sct_head) {
|
||||
sct = sct_head->m_next;
|
||||
free(sct_head);
|
||||
sct_head = sct;
|
||||
}
|
||||
llist_free((llist_t*)sct_head, NULL);
|
||||
}
|
||||
# else
|
||||
static inline void parse_config_file(void)
|
||||
@@ -507,7 +503,7 @@ static void check_suid(int applet_no)
|
||||
# if ENABLE_FEATURE_SUID_CONFIG
|
||||
if (suid_cfg_readable) {
|
||||
uid_t uid;
|
||||
struct BB_suid_config *sct;
|
||||
struct suid_config_t *sct;
|
||||
mode_t m;
|
||||
|
||||
for (sct = suid_config; sct; sct = sct->m_next) {
|
||||
@@ -545,7 +541,7 @@ static void check_suid(int applet_no)
|
||||
|
||||
if (setresuid(-1, uid, uid))
|
||||
bb_perror_msg_and_die("setresuid");
|
||||
return;
|
||||
goto ret;
|
||||
}
|
||||
# if !ENABLE_FEATURE_SUID_CONFIG_QUIET
|
||||
{
|
||||
@@ -553,7 +549,7 @@ static void check_suid(int applet_no)
|
||||
|
||||
if (!onetime) {
|
||||
onetime = 1;
|
||||
fprintf(stderr, "Using fallback suid method\n");
|
||||
bb_error_msg("using fallback suid method");
|
||||
}
|
||||
}
|
||||
# endif
|
||||
@@ -568,6 +564,10 @@ static void check_suid(int applet_no)
|
||||
xsetgid(rgid); /* drop all privileges */
|
||||
xsetuid(ruid);
|
||||
}
|
||||
ret: ;
|
||||
# if ENABLE_FEATURE_SUID_CONFIG
|
||||
llist_free((llist_t*)suid_config, NULL);
|
||||
# endif
|
||||
}
|
||||
# else
|
||||
# define check_suid(x) ((void)0)
|
||||
@@ -784,9 +784,6 @@ int main(int argc UNUSED_PARAM, char **argv)
|
||||
#endif
|
||||
{
|
||||
/* Tweak malloc for reduced memory consumption */
|
||||
#ifndef PAGE_SIZE
|
||||
# define PAGE_SIZE (4*1024) /* guess */
|
||||
#endif
|
||||
#ifdef M_TRIM_THRESHOLD
|
||||
/* M_TRIM_THRESHOLD is the maximum amount of freed top-most memory
|
||||
* to keep before releasing to the OS
|
||||
|
||||
Reference in New Issue
Block a user