diff options
| -rw-r--r-- | include/libbb.h | 9 | ||||
| -rw-r--r-- | libbb/xfuncs_printf.c | 45 |
2 files changed, 42 insertions, 12 deletions
diff --git a/include/libbb.h b/include/libbb.h index 1315e5f..3ab1d6b 100644 --- a/include/libbb.h +++ b/include/libbb.h @@ -461,6 +461,8 @@ void record_signo(int signo); /* not FAST_FUNC! */ 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; void xchdir(const char *path) FAST_FUNC; void xchroot(const char *path) FAST_FUNC; void xsetenv(const char *key, const char *value) FAST_FUNC; @@ -469,11 +471,12 @@ void bb_unsetenv_and_free(char *key) FAST_FUNC; void xunlink(const char *pathname) FAST_FUNC; void xstat(const char *pathname, struct stat *buf) FAST_FUNC; void xfstat(int fd, struct stat *buf, const char *errmsg) FAST_FUNC; +int open3_or_warn(const char *pathname, int flags, int mode) FAST_FUNC; +int open_or_warn(const char *pathname, int flags) FAST_FUNC; +int xopen3(const char *pathname, int flags, int mode) FAST_FUNC; int xopen(const char *pathname, int flags) FAST_FUNC; int xopen_nonblocking(const char *pathname) FAST_FUNC; -int xopen3(const char *pathname, int flags, int mode) FAST_FUNC; -int open_or_warn(const char *pathname, int flags) FAST_FUNC; -int open3_or_warn(const char *pathname, int flags, int mode) FAST_FUNC; +int xopen_as_uid_gid(const char *pathname, int flags, uid_t u, gid_t g) FAST_FUNC; int open_or_warn_stdin(const char *pathname) FAST_FUNC; int xopen_stdin(const char *pathname) FAST_FUNC; void xrename(const char *oldpath, const char *newpath) FAST_FUNC; diff --git a/libbb/xfuncs_printf.c b/libbb/xfuncs_printf.c index a706832..e4ac6a0 100644 --- a/libbb/xfuncs_printf.c +++ b/libbb/xfuncs_printf.c @@ -140,15 +140,6 @@ int FAST_FUNC xopen(const char *pathname, int flags) return xopen3(pathname, flags, 0666); } -/* Die if we can't open an existing file readonly with O_NONBLOCK - * and return the fd. - * Note that for ioctl O_RDONLY is sufficient. - */ -int FAST_FUNC xopen_nonblocking(const char *pathname) -{ - return xopen(pathname, O_RDONLY | O_NONBLOCK); -} - // Warn if we can't open a file and return a fd. int FAST_FUNC open3_or_warn(const char *pathname, int flags, int mode) { @@ -167,6 +158,32 @@ int FAST_FUNC open_or_warn(const char *pathname, int flags) return open3_or_warn(pathname, flags, 0666); } +/* Die if we can't open an existing file readonly with O_NONBLOCK + * and return the fd. + * Note that for ioctl O_RDONLY is sufficient. + */ +int FAST_FUNC xopen_nonblocking(const char *pathname) +{ + return xopen(pathname, O_RDONLY | O_NONBLOCK); +} + +int FAST_FUNC xopen_as_uid_gid(const char *pathname, int flags, uid_t u, gid_t g) +{ + int fd; + uid_t old_euid = geteuid(); + gid_t old_egid = getegid(); + + xsetegid(g); + xseteuid(u); + + fd = xopen(pathname, flags); + + xseteuid(old_euid); + xsetegid(old_egid); + + return fd; +} + void FAST_FUNC xunlink(const char *pathname) { if (unlink(pathname)) @@ -351,6 +368,16 @@ void FAST_FUNC xsetuid(uid_t uid) if (setuid(uid)) bb_perror_msg_and_die("setuid"); } +void FAST_FUNC xsetegid(gid_t egid) +{ + if (setegid(egid)) bb_perror_msg_and_die("setegid"); +} + +void FAST_FUNC xseteuid(uid_t euid) +{ + if (seteuid(euid)) bb_perror_msg_and_die("seteuid"); +} + // Die if we can't chdir to a new path. void FAST_FUNC xchdir(const char *path) { |