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libbb: introduce and use chdir_or_warn()

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function                                             old     new   delta
chdir_or_warn                                          -      37     +37
send_cgi_and_exit                                    720     711      -9
xchdir                                                27      15     -12
setup_environment                                    233     217     -16
fork_job                                             449     433     -16
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/4 up/down: 37/-53)            Total: -16 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2022-01-13 12:56:10 +01:00
parent 931c55f9e2
commit c2788f88f4
5 changed files with 13 additions and 8 deletions
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1
include/libbb.h
View File

@ -645,6 +645,7 @@ void xsetgid(gid_t gid) FAST_FUNC;
void xsetuid(uid_t uid) FAST_FUNC;
void xsetegid(gid_t egid) FAST_FUNC;
void xseteuid(uid_t euid) FAST_FUNC;
int chdir_or_warn(const char *path) FAST_FUNC;
void xchdir(const char *path) FAST_FUNC;
void xfchdir(int fd) FAST_FUNC;
void xchroot(const char *path) FAST_FUNC;

3
libbb/setup_environment.c
View File

@ -37,8 +37,7 @@ void FAST_FUNC setup_environment(const char *shell, int flags, const struct pass
/* Change the current working directory to be the home directory
* of the user */
if (flags & SETUP_ENV_CHDIR) {
if (chdir(pw->pw_dir) != 0) {
bb_error_msg("can't change directory to '%s'", pw->pw_dir);
if (chdir_or_warn(pw->pw_dir) != 0) {
xchdir((flags & SETUP_ENV_TO_TMP) ? "/tmp" : "/");
}
}

11
libbb/xfuncs_printf.c
View File

@ -415,11 +415,18 @@ void FAST_FUNC xseteuid(uid_t euid)
if (seteuid(euid)) bb_simple_perror_msg_and_die("seteuid");
}
int FAST_FUNC chdir_or_warn(const char *path)
{
int r = chdir(path);
if (r != 0)
bb_perror_msg("can't change directory to '%s'", path);
return r;
}
// Die if we can't chdir to a new path.
void FAST_FUNC xchdir(const char *path)
{
if (chdir(path))
bb_perror_msg_and_die("can't change directory to '%s'", path);
if (chdir_or_warn(path) != 0)
xfunc_die();
}
void FAST_FUNC xfchdir(int fd)

3
miscutils/crond.c
View File

@ -675,8 +675,7 @@ static void change_user(struct passwd *pas)
{
/* careful: we're after vfork! */
change_identity(pas); /* - initgroups, setgid, setuid */
if (chdir(pas->pw_dir) < 0) {
bb_error_msg("can't change directory to '%s'", pas->pw_dir);
if (chdir_or_warn(pas->pw_dir) != 0) {
xchdir(CRON_DIR);
}
}

3
networking/httpd.c
View File

@ -1667,8 +1667,7 @@ static void send_cgi_and_exit(
script = last_slash;
if (script != url) { /* paranoia */
*script = '\0';
if (chdir(url + 1) != 0) {
bb_perror_msg("can't change directory to '%s'", url + 1);
if (chdir_or_warn(url + 1) != 0) {
goto error_execing_cgi;
}
// not needed: *script = '/';