diff options
| author | Roland McGrath <roland@gnu.org> | 1996-04-21 00:27:19 +0000 |
|---|---|---|
| committer | Roland McGrath <roland@gnu.org> | 1996-04-21 00:27:19 +0000 |
| commit | b0d20a87b5f0ba27496abcb6a4f9ad99fd412303 (patch) | |
| tree | 9a6f89f0486f5cc4d4d8b4d25b1d9c9a745a2dc9 /sysdeps/generic/dl-sysdep.c | |
| parent | a641835acd28fabf507c5a99d7805c694c2ec7e3 (diff) | |
Sat Apr 20 18:13:00 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>cvs/libc-960423cvs/libc-960422cvs/libc-960421
* Makerules (no-whole-archive): Test $(have-no-whole-archive), not
$(libc_cv_ld_no_whole_archive).
Sat Apr 20 17:07:17 1996 Ulrich Drepper <drepper@cygnus.com>
* assert/assert.h, ctype/ctype.h, dirent/dirent.h, errno.h,
grp/grp.h, io/fcntl.h, io/sys/stat.h, io/utime.h, locale/locale.h,
math/math.h, misc/nlist.h, misc/sgtty.h, misc/sys/file.h,
misc/sys/ioctl.h, misc/sys/uio.h, posix/sys/times.h,
posix/sys/types.h, posix/sys/utsname.h, posix/sys/wait.h,
posix/tar.h, posix/wordexp.h, pwd/pwd.h, resource/sys/vlimit.h,
resource/sys/vtimes.h, setjmp/setjmp.h, signal/signal.h,
stdio-common/printf.h, stdlib/alloca.h, stdlib/stdlib.h,
string/string.h, sysdeps/generic/sigaction.h,
sysdeps/generic/sigset.h, sysdeps/generic/sys/ptrace.h,
sysdeps/generic/sys/ptrace.h, sysdeps/unix/bsd/osf/sigaction.h,
sysdeps/unix/sysv/linux/sys/ptrace.h,
sysdeps/unix/sysv/minix/sigaction.h,
sysdeps/unix/sysv/sco3.2.4/sigaction.h,
sysdeps/unix/sysv/sysv4/sigaction.h,
sysdeps/unix/sysv/sysv4/sigset.h, termios/termios.h,
time/sys/time.h, time/time.h: Fix copyright comment.
* sysdeps/generic/dl-sysdep.c (_dl_sysdep_start): If uids and gids are
not given in stack aux vector, fetch them with syscalls.
Diffstat (limited to 'sysdeps/generic/dl-sysdep.c')
| -rw-r--r-- | sysdeps/generic/dl-sysdep.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/sysdeps/generic/dl-sysdep.c b/sysdeps/generic/dl-sysdep.c index 546993dbd1..4d5faad69f 100644 --- a/sysdeps/generic/dl-sysdep.c +++ b/sysdeps/generic/dl-sysdep.c @@ -40,6 +40,7 @@ _dl_sysdep_start (void **start_argptr, Elf32_auxv_t *av; uid_t uid, euid; gid_t gid, egid; + unsigned int seen; user_entry = (Elf32_Addr) &_start; _dl_argc = *(int *) start_argptr; @@ -49,7 +50,12 @@ _dl_sysdep_start (void **start_argptr, while (*start_argptr) ++start_argptr; - for (av = (void *) ++start_argptr; av->a_type != AT_NULL; ++av) + seen = 0; +#define M(type) (1 << (type)) + + for (av = (void *) ++start_argptr; + av->a_type != AT_NULL; + seen |= M ((++av)->a_type)) switch (av->a_type) { case AT_PHDR: @@ -75,6 +81,16 @@ _dl_sysdep_start (void **start_argptr, break; } + /* Linux doesn't provide us with any of these values on the stack + when the dynamic linker is run directly as a program. */ + +#define SEE(UID, uid) if ((seen & M (AT_##UID)) == 0) uid = __get##uid () + SEE (UID, uid); + SEE (GID, gid); + SEE (EUID, euid); + SEE (EGID, egid); + + _dl_secure = uid != euid || gid != egid; #ifdef DL_SYSDEP_INIT |