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authorRyan Mallon <rmallon@gmail.com>2013-10-08 14:52:49 +0200
committerDenys Vlasenko <vda.linux@googlemail.com>2013-10-08 14:52:49 +0200
commit5906a5c26c392b9687d14951a6da3a5195b576be (patch)
tree0f7038d653988cb63f9efe431b9e6674173f60d1 /libbb
parent932e233a491b6a5b9293ace04ef74667a95d739c (diff)
libbb: Add xsetegid(), xseteuid(), xopen_as_uid_gid() functions
Signed-off-by: Ryan Mallon <rmallon@gmail.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libbb')
-rw-r--r--libbb/xfuncs_printf.c45
1 files changed, 36 insertions, 9 deletions
diff --git a/libbb/xfuncs_printf.c b/libbb/xfuncs_printf.c
index a70683241..e4ac6a002 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)
{