From b0d20a87b5f0ba27496abcb6a4f9ad99fd412303 Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Sun, 21 Apr 1996 00:27:19 +0000 Subject: Sat Apr 20 18:13:00 1996 Roland McGrath * 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 * 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. --- sysdeps/generic/dl-sysdep.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) (limited to 'sysdeps/generic/dl-sysdep.c') 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 -- cgit v1.2.3