/* * Copyright 1990 - 1994, Julianne Frances Haugh * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of Julianne F. Haugh nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * chpasswd - update passwords in batch * * chpasswd reads standard input for a list of colon separated * user names and new passwords. the appropriate password * files are updated to reflect the changes. because the * changes are made in a batch fashion, the user must run * the mkpasswd command after this command terminates since * no password updates occur until the very end. * * 1997/07/29: Modified to take "-e" argument which specifies that * the passwords have already been encrypted. * -- Jay Soffian */ #include #include "rcsid.h" RCSID(PKG_VER "$Id: chpasswd.c,v 1.10 2000/08/26 18:27:18 marekm Exp $") #include #include "prototypes.h" #include "defines.h" #include #include #include "pwio.h" #ifdef SHADOWPWD #include "shadowio.h" #endif static char *Prog; static int eflg = 0; #ifdef SHADOWPWD static int is_shadow_pwd; #endif extern char *l64a(); /* local function prototypes */ static void usage(void); /* * usage - display usage message and exit */ static void usage(void) { fprintf(stderr, _("usage: %s [-e]\n"), Prog); exit(1); } int main(int argc, char **argv) { char buf[BUFSIZ]; char *name; char *newpwd; char *cp; #ifdef SHADOWPWD const struct spwd *sp; struct spwd newsp; #endif const struct passwd *pw; struct passwd newpw; #ifdef ATT_AGE char newage[5]; #endif int errors = 0; int line = 0; long now = time ((long *) 0) / (24L*3600L); int ok; Prog = Basename(argv[0]); setlocale(LC_ALL, ""); bindtextdomain(PACKAGE, LOCALEDIR); textdomain(PACKAGE); /* XXX - use getopt() */ if (!(argc == 1 || (argc == 2 && !strcmp(argv[1], "-e")))) usage(); if (argc == 2) eflg = 1; /* * Lock the password file and open it for reading. This will * bring all of the entries into memory where they may be * updated. */ if (!pw_lock()) { fprintf(stderr, _("%s: can't lock password file\n"), Prog); exit(1); } if (! pw_open (O_RDWR)) { fprintf(stderr, _("%s: can't open password file\n"), Prog); pw_unlock(); exit(1); } #ifdef SHADOWPWD is_shadow_pwd = spw_file_present(); if (is_shadow_pwd) { if (!spw_lock()) { fprintf(stderr, _("%s: can't lock shadow file\n"), Prog); pw_unlock(); exit(1); } if (!spw_open(O_RDWR)) { fprintf(stderr, _("%s: can't open shadow file\n"), Prog); pw_unlock(); spw_unlock(); exit(1); } } #endif /* * Read each line, separating the user name from the password. * The password entry for each user will be looked up in the * appropriate file (shadow or passwd) and the password changed. * For shadow files the last change date is set directly, for * passwd files the last change date is set in the age only if * aging information is present. */ while (fgets (buf, sizeof buf, stdin) != (char *) 0) { line++; if ((cp = strrchr (buf, '\n'))) { *cp = '\0'; } else { fprintf(stderr, _("%s: line %d: line too long\n"), Prog, line); errors++; continue; } /* * The username is the first field. It is separated * from the password with a ":" character which is * replaced with a NUL to give the new password. The * new password will then be encrypted in the normal * fashion with a new salt generated, unless the '-e' * is given, in which case it is assumed to already be * encrypted. */ name = buf; if ((cp = strchr (name, ':'))) { *cp++ = '\0'; } else { fprintf(stderr, _("%s: line %d: missing new password\n"), Prog, line); errors++; continue; } newpwd = cp; if (!eflg) cp = pw_encrypt(newpwd, crypt_make_salt()); /* * Get the password file entry for this user. The user * must already exist. */ pw = pw_locate(name); if (!pw) { fprintf (stderr, _("%s: line %d: unknown user %s\n"), Prog, line, name); errors++; continue; } #ifdef SHADOWPWD if (is_shadow_pwd) sp = spw_locate(name); else sp = NULL; #endif /* * The freshly encrypted new password is merged into * the user's password file entry and the last password * change date is set to the current date. */ #ifdef SHADOWPWD if (sp) { newsp = *sp; newsp.sp_pwdp = cp; newsp.sp_lstchg = now; } else #endif { newpw = *pw; newpw.pw_passwd = cp; #ifdef ATT_AGE if (newpw.pw_age[0]) { strcpy(newage, newpw.pw_age); strcpy(newage + 2, l64a(now / 7)); newpw.pw_age = newage; } #endif } /* * The updated password file entry is then put back * and will be written to the password file later, after * all the other entries have been updated as well. */ #ifdef SHADOWPWD if (sp) ok = spw_update(&newsp); else #endif ok = pw_update(&newpw); if (!ok) { fprintf(stderr, _("%s: line %d: cannot update password entry\n"), Prog, line); errors++; continue; } } /* * Any detected errors will cause the entire set of changes * to be aborted. Unlocking the password file will cause * all of the changes to be ignored. Otherwise the file is * closed, causing the changes to be written out all at * once, and then unlocked afterwards. */ if (errors) { fprintf(stderr, _("%s: error detected, changes ignored\n"), Prog); #ifdef SHADOWPWD if (is_shadow_pwd) spw_unlock(); #endif pw_unlock(); exit(1); } #ifdef SHADOWPWD if (is_shadow_pwd) { if (!spw_close()) { fprintf(stderr, _("%s: error updating shadow file\n"), Prog); pw_unlock(); exit(1); } spw_unlock(); } #endif if (!pw_close()) { fprintf(stderr, _("%s: error updating password file\n"), Prog); exit(1); } pw_unlock(); return (0); }