From 2698e32c2c2fae23c5c5f39f73b09553158b482d Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Fri, 31 Jul 1998 18:02:14 +0000 Subject: Update. 1998-07-31 17:59 Ulrich Drepper * sysdeps/unix/sysv/linux/Makefile [subdir==misc] (sysdep_routines): Add sys_setresuid. 1998-07-30 Mark Kettenis * sysdeps/unix/sysv/linux/syscalls.list: Add __syscall_setresuid as real name for system call and make setresuid a weak alias. Set caller to seteuid. * sysdeps/unix/sysv/linux/seteuid.c (seteuid): Implement using `setresuid' syscall if availble. Fixes problems with sendmail which expects `seteuid' to not set the saved user ID. 1998-07-30 20:09 -0400 Zack Weinberg * time/tzset.c (__tzstring): Get rid of excessive cleverness which was causing stack corruption. 1998-07-31 16:41 -0400 Zack Weinberg * argp/argp-fmtstream.c (__argp_fmtstream_update): Correct off-by-one in wordwrap algorithm when there' a space at the beginning of the buffer. 1998-07-31 15:45 Ulrich Drepper * Makerules (LDLIBS-c.so): Extend value instead of overwriting it. --- sysdeps/unix/sysv/linux/Makefile | 2 +- sysdeps/unix/sysv/linux/seteuid.c | 52 ++++++++++++++++++++++++++++++++++- sysdeps/unix/sysv/linux/syscalls.list | 2 +- 3 files changed, 53 insertions(+), 3 deletions(-) (limited to 'sysdeps/unix') diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile index 7de1008716..af53184cb2 100644 --- a/sysdeps/unix/sysv/linux/Makefile +++ b/sysdeps/unix/sysv/linux/Makefile @@ -9,7 +9,7 @@ CPPFLAGS += -DHAVE_LLSEEK=1 endif ifeq ($(subdir),misc) -sysdep_routines += sysctl clone llseek getresuid getresgid +sysdep_routines += sysctl clone llseek getresuid getresgid sys_setresuid sysdep_headers += sys/mount.h sys/acct.h sys/sysctl.h sys/mtio.h \ sys/io.h sys/klog.h sys/kdaemon.h \ diff --git a/sysdeps/unix/sysv/linux/seteuid.c b/sysdeps/unix/sysv/linux/seteuid.c index 37fb72c020..c8e3950cfa 100644 --- a/sysdeps/unix/sysv/linux/seteuid.c +++ b/sysdeps/unix/sysv/linux/seteuid.c @@ -1 +1,51 @@ -#include +/* Copyright (C) 1998 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include +#include +#include +#include + +#ifdef __NR_setresuid + +extern int __syscall_setresuid (uid_t ruid, uid_t euid, uid_t suid); + +int +seteuid (uid_t uid) +{ + int result; + + if (uid == (uid_t) ~0) + { + __set_errno (EINVAL); + return -1; + } + + /* First try the syscall. */ + result = __syscall_setresuid (-1, uid, -1); + if (result == -1 && errno == ENOSYS) + /* No system call available. Use emulation. This may not work + since `setreuid' also sets the saved user ID when UID is not + equal to the real user ID, making it impossible to switch back. */ + result = __setreuid (-1, uid); + + return result; +} +#else +# include +#endif diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list index e80fd84568..6d06d0df99 100644 --- a/sysdeps/unix/sysv/linux/syscalls.list +++ b/sysdeps/unix/sysv/linux/syscalls.list @@ -71,12 +71,12 @@ setfsgid EXTRA setfsgid 1 setfsgid setfsuid EXTRA setfsuid 1 setfsuid setpgid - setpgid 2 __setpgid setpgid setresgid EXTRA setresgid 3 setresgid -setresuid EXTRA setresuid 3 setresuid sigaltstack - sigaltstack 2 __sigaltstack sigaltstack sys_fstat fxstat fstat 2 __syscall_fstat sys_lstat lxstat lstat 2 __syscall_lstat sys_mknod xmknod mknod 3 __syscall_mknod sys_readv readv readv 3 __syscall_readv +sys_setresuid EXTRA setresuid 3 __syscall_setresuid sys_stat xstat stat 2 __syscall_stat sys_writev writev writev 3 __syscall_writev sysinfo EXTRA sysinfo 1 sysinfo -- cgit 1.4.1