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0ea5db4f1f
1999-06-28 Andreas Jaeger <aj@arthur.rhein-neckar.de> * inet/rcmd.c (__icheckhost): Test for gethostbyname_r result correctly. 1999-06-25 Andreas Jaeger <aj@arthur.rhein-neckar.de> * manual/arith.texi (System V Number Conversion): Fix the description which confused pointer and value to pointer. Reported by Andries.Brouwer@cwi.nl. 1999-06-28 Andreas Jaeger <aj@arthur.rhein-neckar.de> * pwd/getpw.c (__getpw): Check for NULL result pointer. 1999-06-29 Andreas Jaeger <aj@arthur.rhein-neckar.de> * manual/users.texi (Lookup User): Document POSIX return semantics for getpwuid_r and getgrgid_r. * manual/socket.texi (Host Names): Document that the result pointer is null in case of error or host not found and fix a typo. Give a small example.
66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
/* Copyright (C) 1991, 1992, 1996, 1998, 1999 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 <errno.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <pwd.h>
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/* Re-construct the password-file line for the given uid
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in the given buffer. This knows the format that the caller
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will expect, but this need not be the format of the password file. */
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int __getpw __P ((__uid_t uid, char *buf));
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int
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__getpw (uid, buf)
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__uid_t uid;
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char *buf;
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{
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size_t buflen;
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char *tmpbuf;
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struct passwd resbuf, *p;
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if (buf == NULL)
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{
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__set_errno (EINVAL);
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return -1;
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}
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buflen = __sysconf (_SC_GETPW_R_SIZE_MAX);
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tmpbuf = alloca (buflen);
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if (__getpwuid_r (uid, &resbuf, tmpbuf, buflen, &p) != 0)
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return -1;
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if (p == NULL)
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return -1;
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if (sprintf (buf, "%s:%s:%lu:%lu:%s:%s:%s", p->pw_name, p->pw_passwd,
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(unsigned long int) p->pw_uid, (unsigned long int) p->pw_gid,
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p->pw_gecos, p->pw_dir, p->pw_shell) < 0)
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return -1;
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return 0;
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}
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weak_alias (__getpw, getpw)
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link_warning (getpw, "the `getpw' function is dangerous and should not be used.")
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