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authorUlrich Drepper <drepper@redhat.com>2006-06-04 22:17:06 +0000
committerUlrich Drepper <drepper@redhat.com>2006-06-04 22:17:06 +0000
commit1b8373f475105307ee3b64d423ffec995ddd6cde (patch)
tree63e112ef455d96f071030b6376bb572d528a4631
parent7231452e5cffcd506f7e7402484708740bc07c18 (diff)
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* sysdeps/posix/spawni.c (__spawni): Use local_seteuid and
local_setegid instead of seteuid and setegid. * sysdeps/generic/local-setxid.h: New file. * sysdeps/unix/sysv/linux/local-setxid.h: New file.
-rw-r--r--ChangeLog5
-rw-r--r--sysdeps/generic/local-setxid.h4
-rw-r--r--sysdeps/posix/spawni.c4
-rw-r--r--sysdeps/unix/sysv/linux/local-setxid.h23
4 files changed, 35 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index ea5356e..bb1e48c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
2006-06-04 Ulrich Drepper <drepper@redhat.com>
+ * sysdeps/posix/spawni.c (__spawni): Use local_seteuid and
+ local_setegid instead of seteuid and setegid.
+ * sysdeps/generic/local-setxid.h: New file.
+ * sysdeps/unix/sysv/linux/local-setxid.h: New file.
+
* sysdeps/posix/spawni.c (__spawni): Use non-cancelable interfaces.
* string/Makefile (tests): Add bug-envz1.
diff --git a/sysdeps/generic/local-setxid.h b/sysdeps/generic/local-setxid.h
new file mode 100644
index 0000000..b70d9ff
--- /dev/null
+++ b/sysdeps/generic/local-setxid.h
@@ -0,0 +1,4 @@
+/* No special support. Fall back to the regular functions. */
+
+#define local_seteuid(id) seteuid (id)
+#define local_setegid(id) setegid (id)
diff --git a/sysdeps/posix/spawni.c b/sysdeps/posix/spawni.c
index d6a866a..29803a8 100644
--- a/sysdeps/posix/spawni.c
+++ b/sysdeps/posix/spawni.c
@@ -26,6 +26,7 @@
#include <unistd.h>
#include "spawn_int.h"
#include <not-cancel.h>
+#include <local-setxid.h>
/* The Unix standard contains a long explanation of the way to signal
@@ -155,7 +156,8 @@ __spawni (pid_t *pid, const char *file,
/* Set the effective user and group IDs. */
if ((flags & POSIX_SPAWN_RESETIDS) != 0
- && (seteuid (__getuid ()) != 0 || setegid (__getgid ()) != 0))
+ && (local_seteuid (__getuid ()) != 0
+ || local_setegid (__getgid ()) != 0))
_exit (SPAWN_ERROR);
/* Execute the file actions. */
diff --git a/sysdeps/unix/sysv/linux/local-setxid.h b/sysdeps/unix/sysv/linux/local-setxid.h
new file mode 100644
index 0000000..0579687
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/local-setxid.h
@@ -0,0 +1,23 @@
+/* SETxID functions which only have to change the local thread and
+ none of the possible other threads. */
+#include <kernel-features.h>
+#include <sysdep.h>
+
+/* If we can use the syscall directly, use it. */
+#if __ASSUME_32BITUIDS > 0 && defined __NR_setresuid32
+# define local_seteuid(id) INLINE_SYSCALL (setresuid32, 3, -1, id, -1)
+#elif __ASSUME_SETRESUID_SYSCALL > 0
+# define local_seteuid(id) INLINE_SYSCALL (setresuid, 3, -1, id, -1)
+#else
+# define local_seteuid(id) seteuid (id)
+#endif
+
+
+/* If we can use the syscall directly, use it. */
+#if __ASSUME_32BITUIDS > 0 && defined __NR_setresgid32
+# define local_setegid(id) INLINE_SYSCALL (setresgid32, 3, -1, id, -1)
+#elif __ASSUME_SETRESGID_SYSCALL > 0
+# define local_setegid(id) INLINE_SYSCALL (setresgid, 3, -1, id, -1)
+#else
+# define local_setegid(id) setegid (id)
+#endif