diff options
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/generic/local-setxid.h | 4 | ||||
| -rw-r--r-- | sysdeps/posix/spawni.c | 4 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/local-setxid.h | 23 |
3 files changed, 30 insertions, 1 deletions
diff --git a/sysdeps/generic/local-setxid.h b/sysdeps/generic/local-setxid.h new file mode 100644 index 0000000000..b70d9ffb32 --- /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 d6a866a186..29803a8461 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 0000000000..0579687982 --- /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 |