libarchive: open_zipped() does not need to check extensions for e.g. gzip

[oweals/busybox.git] / libbb / xfuncs_printf.c

diff --git a/libbb/xfuncs_printf.c b/libbb/xfuncs_printf.c
index 05aa07ce80151077676aa072073f81fffc3dd4f9..e4ac6a002a56854550ac4758238133cdaa51ea70 100644 (file)
--- 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)
 {
@@ -541,13 +568,11 @@ int FAST_FUNC bb_xioctl(int fd, unsigned request, void *argp)
 
 char* FAST_FUNC xmalloc_ttyname(int fd)
 {
-       char *buf = xzalloc(128);
-       int r = ttyname_r(fd, buf, 127);
-       if (r) {
-               free(buf);
-               buf = NULL;
-       }
-       return buf;
+       char buf[128];
+       int r = ttyname_r(fd, buf, sizeof(buf) - 1);
+       if (r)
+               return NULL;
+       return xstrdup(buf);
 }
 
 void FAST_FUNC generate_uuid(uint8_t *buf)