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Mon Dec 2 03:59:38 1996 Ulrich Drepper <drepper@cygnus.com> * grp/initgroups.c: Update and reformat copyright. Use __getgrent_r instead of getgrent. * inet/rcmd.c: Update and reformat copyright. Use __gethostbyname_r instead of gethostbyname. * inet/rexec.c: Likewise. * intl/finddomain.c: Correct comment about CEN sponsor and revision. * locale/findlocale.c: Likewise. * intl/l10nflist.c: Correct handling of CEN sponsor and revision. * locale/Makefile (CPPFLAGS): Add definition of LOCALEDIR. * locale/setlocale.c (setlocale): Correctly split value of LOCALE_PATH. * locale/programs/localedef.c: Use LOCALEDIR not LOCALE_PATH to find output directory. * nss/getXXbyYY.c [NEED_H_ERRNO]: Before enlarging buffer test h_errno_tmp variable. Save error value from being changed during `free' call. * nss/getXXent.c: Likewise. * nss/nss_files/files-XXX.c: Set h_errno variable to NETDB_INTERNAL before returning ERANGE error. * posix/glob.c: Use getlogin_r and getpwnam_r function when available or in GNU libc. * pwd/getpw.c: Use getpwuid_r instead of getpwuid. * sunrpc/clnt_gen.c: Use gethostbyname_r and getprotobyname_r. * sunrpc/clnt_simp.c: Likewise. * sunrpc/getrpcport.c: Likewise. * sysdeps/unix/sysv/linux/gethostid.c: Likewise. * posix/getconf.c: Treat _SC_UNIT_MAX and _SC_ULONG_MAX separately since the value might be outsode the range of the `long int'. Print string `undefined' when a value is undefined. * stdlib/l64a.c: Return correct pointer. Patch by NIIBE Yutaka <gniibe@mri.co.jp>. * string/Makefile (routines): Add argz-addsep. * string/argz-addsep.c: New file. * string/argz.h: Add prototypes for argz_add_sep. * string/argz-ctsep.c: Prevent memory leak. * string/strcoll.c: Correct typo in comment. Sat Nov 30 02:53:59 1996 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/sys/serial.h: Removed again. The file is not general enough to be part of the libc. * sysdeps/unix/sysv/linux/Dist: Remove sys/serial.h. * sysdeps/unix/sysv/linux/Makefile: Don't install sys/serial.h. Thu Nov 28 20:04:41 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * login/Makefile: Fix typo. * nss/Makefile (generated): Filter out db-alias.c. Thu Nov 28 14:44:01 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * time/Makefile (echo-zonenames): Don't depend on non-existing target `zonenames'. Thu Nov 28 12:34:05 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * link.h: New file. * nss/nsswitch.c: Use it. * printf.h: Fix file name. * stdlib/strfmon.c: Use it.
102 lines
2.5 KiB
C
102 lines
2.5 KiB
C
/* Copyright (C) 1989, 1991, 1993, 1996 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <alloca.h>
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#include <unistd.h>
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#include <string.h>
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#include <grp.h>
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#include <limits.h>
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#include <sys/types.h>
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/* Initialize the group set for the current user
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by reading the group database and using all groups
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of which USER is a member. Also include GROUP. */
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int
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initgroups (user, group)
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const char *user;
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gid_t group;
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{
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#if defined (NGROUPS_MAX) && NGROUPS_MAX == 0
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/* No extra groups allowed. */
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return 0;
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#else
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struct group grpbuf, *g;
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size_t buflen = sysconf (_SC_GETPW_R_SIZE_MAX);
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char *tmpbuf;
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register size_t n;
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size_t ngroups;
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gid_t *groups;
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#ifdef NGROUPS_MAX
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# define limit NGROUPS_MAX
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ngroups = limit;
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#else
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long int limit = sysconf (_SC_NGROUPS_MAX);
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if (limit > 0)
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ngroups = limit;
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else
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/* No fixed limit on groups. Pick a starting buffer size. */
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ngroups = 16;
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#endif
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groups = __alloca (ngroups * sizeof *groups);
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tmpbuf = __alloca (buflen);
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setgrent ();
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n = 0;
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groups[n++] = group;
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while (__getgrent_r (&grpbuf, tmpbuf, buflen, &g) >= 0)
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if (g->gr_gid != group)
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{
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register char **m;
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for (m = g->gr_mem; *m != NULL; ++m)
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if (strcmp (*m, user) == 0)
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{
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/* Matches user. Insert this group. */
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if (n == ngroups && limit <= 0)
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{
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/* Need a bigger buffer. */
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groups = memcpy (__alloca (ngroups * 2 * sizeof *groups),
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groups, ngroups * sizeof *groups);
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ngroups *= 2;
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}
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groups[n++] = g->gr_gid;
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if (n == limit)
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/* Can't take any more groups; stop searching. */
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goto done;
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break;
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}
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}
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done:
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endgrent ();
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return setgroups (n, groups);
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#endif
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}
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