9adfc136b6
libmisc/xgetXXbyYY.c, libmisc/xgetpwnam.c, libmisc/xgetpwuid.c, libmisc/xgetgrnam.c, libmisc/xgetgrgid.c, libmisc/xgetspnam.c: Added functions xgetpwnam(), xgetpwuid(), xgetgrnam(), xgetgrgid(), and xgetspnam(). They allocate memory for the returned structure and are more robust to successive calls. They are implemented with the libc's getxxyyy_r() functions if available. * libmisc/limits.c, libmisc/entry.c, libmisc/chowntty.c, libmisc/addgrps.c, libmisc/myname.c, libmisc/rlogin.c, libmisc/pwdcheck.c, src/newgrp.c, src/login_nopam.c, src/userdel.c, src/lastlog.c, src/grpck.c, src/gpasswd.c, src/newusers.c, src/chpasswd.c, src/chfn.c, src/groupmems.c, src/usermod.c, src/expiry.c, src/groupdel.c, src/chgpasswd.c, src/su.c, src/useradd.c, src/groupmod.c, src/passwd.c, src/pwck.c, src/groupadd.c, src/chage.c, src/login.c, src/suauth.c, src/faillog.c, src/groups.c, src/chsh.c, src/id.c: Review all the usage of one of the getpwnam(), getpwuid(), getgrnam(), getgrgid(), and getspnam() functions. It was noticed on http://bugs.debian.org/341230 that chfn and chsh use a passwd structure after calling a pam function, which result in using information from the passwd structure requested by pam, not the original one. It is much easier to use the new xget... functions to avoid these issues. I've checked which call to the original get... functions could be left (reducing the scope of the structure if possible), and I've left comments to ease future reviews (e.g. /* local, no need for xgetpwnam */). Note: the getpwent/getgrent calls should probably be checked also. * src/groupdel.c, src/expiry.c: Fix typos in comments. * src/groupmod.c: Re-indent. * libmisc/Makefile.am, lib/groupmem.c, lib/groupio.c, lib/pwmem.c, lib/pwio.c, lib/shadowmem.c, lib/shadowio.c: Move the __<xx>_dup functions (used by the xget... functions) from the <xx>io.c files to the new <xx>mem.c files. This avoid linking some utils against the SELinux library.
183 lines
3.9 KiB
C
183 lines
3.9 KiB
C
/*
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* Copyright 1989 - 1994, Julianne Frances Haugh
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Julianne F. Haugh nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <config.h>
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#ifdef RLOGIN
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#ident "$Id$"
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#include "prototypes.h"
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#include "defines.h"
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#include <stdio.h>
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#include <pwd.h>
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#include <netdb.h>
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static struct {
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int spd_name;
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int spd_baud;
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} speed_table[] =
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{
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#ifdef B50
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{
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B50, 50},
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#endif
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#ifdef B75
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{
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B75, 75},
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#endif
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#ifdef B110
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{
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B110, 110},
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#endif
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#ifdef B134
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{
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B134, 134},
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#endif
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#ifdef B150
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{
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B150, 150},
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#endif
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#ifdef B200
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{
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B200, 200},
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#endif
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#ifdef B300
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{
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B300, 300},
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#endif
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#ifdef B600
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{
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B600, 600},
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#endif
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#ifdef B1200
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{
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B1200, 1200},
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#endif
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#ifdef B1800
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{
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B1800, 1800},
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#endif
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#ifdef B2400
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{
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B2400, 2400},
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#endif
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#ifdef B4800
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{
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B4800, 4800},
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#endif
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#ifdef B9600
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{
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B9600, 9600},
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#endif
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#ifdef B19200
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{
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B19200, 19200},
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#endif
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#ifdef B38400
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{
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B38400, 38400},
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#endif
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{
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-1, -1}
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};
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static void get_remote_string (char *buf, int size)
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{
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for (;;) {
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if (read (0, buf, 1) != 1)
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exit (1);
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if (*buf == '\0')
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return;
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if (--size > 0)
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++buf;
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}
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/*NOTREACHED*/}
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int
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do_rlogin (const char *remote_host, char *name, int namelen, char *term,
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int termlen)
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{
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struct passwd *pwd;
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char remote_name[32];
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char *cp;
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int remote_speed = 9600;
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int speed_name = B9600;
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int i;
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TERMIO termio;
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get_remote_string (remote_name, sizeof remote_name);
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get_remote_string (name, namelen);
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get_remote_string (term, termlen);
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if ((cp = strchr (term, '/'))) {
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*cp++ = '\0';
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if (!(remote_speed = atoi (cp)))
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remote_speed = 9600;
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}
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for (i = 0; speed_table[i].spd_baud != remote_speed &&
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speed_table[i].spd_name != -1; i++);
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if (speed_table[i].spd_name != -1)
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speed_name = speed_table[i].spd_name;
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/*
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* Put the terminal in cooked mode with echo turned on.
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*/
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GTTY (0, &termio);
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termio.c_iflag |= ICRNL | IXON;
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termio.c_oflag |= OPOST | ONLCR;
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termio.c_lflag |= ICANON | ECHO | ECHOE;
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#ifdef CBAUD
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termio.c_cflag = (termio.c_cflag & ~CBAUD) | speed_name;
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#else
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termio.c_cflag = (termio.c_cflag) | speed_name;
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#endif
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STTY (0, &termio);
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if (!(pwd = getpwnam (name))) /* local, no need for xgetpwnam */
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return 0;
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/*
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* ruserok() returns 0 for success on modern systems, and 1 on
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* older ones. If you are having trouble with people logging
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* in without giving a required password, THIS is the culprit -
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* go fix the #define in config.h.
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*/
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#ifndef RUSEROK
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return 0;
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#else
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return ruserok (remote_host, pwd->pw_uid == 0,
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remote_name, name) == RUSEROK;
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#endif
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}
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#endif /* RLOGIN */
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