From b8fe19fa809ac786b7d3dbb464cb1b3f887dc69d Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Wed, 22 May 1996 02:11:55 +0000 Subject: Wed May 22 01:48:54 1996 Ulrich Drepper * stdlib/strtol.c [!QUAD] (ULONG_MAX, LONG_MAX): Define these macros if they are not available. (WEAKNAME): New macro to declare argument as weak. Define function with __ prefix and add normal name as weak alias. * sysdeps/posix/euidaccess.c (S_IROTH, S_IWOTH, S_IXOTH): Defines these macros if not already available based on R_OK, W_OK, and X_OK. Tue May 21 18:48:46 1996 Roland McGrath * misc/sys/syslog.h (__need___va_list): Define this instead of __need_va_list before including . * Makerules (o-iterator): Use $(object-suffixes-left) instead of $(object-suffixes) to produce repetitions; this is used for other lists than just that one. [versioned]: Use $(o-iterator) properly. * sysdeps/unix/sysv/linux/Implies: Include `gnu'. * sysdeps/mach/hurd/Implies: Likewise. Sat May 18 02:57:46 1996 Ulrich Drepper * login/Makefile: New file. This directory contains functions for user administration. * Makefile (subdirs): Add login. * misc/Makefile (headers): Remove utmp.h. Now in login/utmp.h. (extra-libs, libutil-routines): Ditto. * misc/login.c, misc/login_tty.c, misc/logout.c, misc/logwtmp.c, misc/utmp.h: Moved to misc/. * login/login.c, login/login_tty.c, login/logout.c, login/logwtmp.c, login/utmp.h: Moved to here from misc/. * login/utmp.h: Split file. Definitions of data structures and constants are now in the system dependent utmpbits.h file. * login/setutent_r.c, login/setutent.c, login/endutent_r.c, login/endutent.c, login/getutent_r.c, login/getutent.c, login/getutid_r.c, login/getutid.c, login/getutline_r.c, login/getutline.c, login/pututline_r.c, login/pututline.c: New files. Routines to handle utmp-style files. * sysdeps/gnu/utmpbits.h: New file. Contains GNU/Linux specific definitions of utmp data structures and constants. * sysdeps/unix/sysv/utmpbits.h: Renamed from sysdeps/unix/sysv/utmp.h. * sysdeps/generic/utmpbits.h: New file. Generic (BSDish) version of definitions of utmp data structures and constants. Fri May 17 00:01:31 1996 Ulrich Drepper * locale/C-monetary.c: Default value for mon_decimal_point should be '.'. * stdio-common/printf.h: Remove Linux libc compatibility stuff. Add `extra' flag. Currently used in __printf_fp. * stdio-common/printf_fp.c (__guess_grouping): Renamed from `guess_grouping' and extend visibility to extern. This function is now used in `strfmon'. (__printf_fp): Recognize new bit flag in info struct. This triggers to use the grouping information and decimal point from the LC_MONETARY category instead of the LC_NUMERIC category. * stdio-common/vfprintf.c (process_arg): Correct major bug. In `complicated' loop we must not use the varargs because the args are already available in the ARGS_VALUE array. * stdlib/Makefile (headers): Add monetary.h. (routines): Add strfmon. * stdlib/monetary.h: New file. Header for strfmon function. * stdlib/strfmon.c: New file. Implement strfmon function to print monetary amounts according to current locale's rules. * sysdeps/unix/sysv/linux/i386/sys/vm86.h: The kernel header is now (>= Linux-1.3.100) called . --- login/pututline_r.c | 89 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 89 insertions(+) create mode 100644 login/pututline_r.c (limited to 'login/pututline_r.c') diff --git a/login/pututline_r.c b/login/pututline_r.c new file mode 100644 index 0000000000..365a37672e --- /dev/null +++ b/login/pututline_r.c @@ -0,0 +1,89 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. +Contributed by Ulrich Drepper , 1996. + +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 +#include +#include +#include + + +int +pututline_r (const struct utmp *utmp_ptr, struct utmp_data *utmp_data) +{ + /* Open utmp file if not already done. */ + if (utmp_data->ut_fd == -1) + { + setutent_r (utmp_data); + if (utmp_data->ut_fd == -1) + return -1; + } + + /* Seek position to write. */ + if (utmp_data->ubuf.ut_type != utmp_ptr->ut_type) + { + /* We must not overwrite the data in UTMP_DATA. */ + struct utmp_data *data_tmp = alloca (sizeof (utmp_data)); + struct utmp *dummy; + + memcpy (data_tmp, utmp_data, sizeof (utmp_data)); + utmp_data = data_tmp; + + if (getutid_r (utmp_ptr, &dummy, utmp_data) < 0) + { + if (errno != ESRCH) + return -1; + + utmp_data->loc_utmp = lseek (utmp_data->ut_fd, 0, SEEK_END); + if (utmp_data->loc_utmp == -1) + return -1; + } + } + + /* Position file correctly. */ + if (utmp_data->loc_utmp > 0 + && lseek (utmp_data->ut_fd, utmp_data->loc_utmp - sizeof (struct utmp), + SEEK_SET) < 0) + return -1; + + /* XXX An alternative solution would be to call an SUID root program + which write the new value. */ + + /* Try to lock the file. */ + if (flock (utmp_data->ut_fd, LOCK_EX | LOCK_NB) < 0 && errno != ENOSYS) + { + /* Oh, oh. The file is already locked. Wait a bit and try again. */ + sleep (1); + + /* This time we ignore the error. */ + (void) flock (utmp_data->ut_fd, LOCK_EX | LOCK_NB); + } + + /* Write the new data. */ + if (write (utmp_data->ut_fd, &utmp_data->ubuf, sizeof (struct utmp)) + != sizeof (struct utmp)) + return -1; + + /* And unlock the file. */ + (void) flock (utmp_data->ut_fd, LOCK_UN); + + return 0; +} -- cgit v1.2.3