/* * Copyright 1990 - 1993, 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. * * newusers - create users from a batch file * * newusers creates a collection of entries in /etc/passwd * and related files by reading a passwd-format file and * adding entries in the related directories. */ #include #include "rcsid.h" RCSID (PKG_VER "$Id: newusers.c,v 1.26 2005/08/11 16:23:34 kloczek Exp $") #include #include #include "prototypes.h" #include "defines.h" #include #include #include #include #ifdef USE_PAM #include #include #endif /* USE_PAM */ static char *Prog; #include "getdef.h" #include "pwio.h" #include "groupio.h" #include "shadowio.h" static int is_shadow; /* local function prototypes */ static void usage (void); static int add_group (const char *, const char *, gid_t *); static int add_user (const char *, const char *, uid_t *, gid_t); static void update_passwd (struct passwd *, const char *); static int add_passwd (struct passwd *, const char *); /* * usage - display usage message and exit */ static void usage (void) { fprintf (stderr, _("Usage: %s [input]\n"), Prog); exit (1); } /* * add_group - create a new group or add a user to an existing group */ static int add_group (const char *name, const char *gid, gid_t * ngid) { const struct passwd *pwd; const struct group *grp; struct group grent; char *members[2]; int i; /* * Start by seeing if the named group already exists. This will be * very easy to deal with if it does. */ if ((grp = gr_locate (gid))) { add_member: grent = *grp; *ngid = grent.gr_gid; for (i = 0; grent.gr_mem[i] != (char *) 0; i++) if (strcmp (grent.gr_mem[i], name) == 0) return 0; grent.gr_mem = (char **) xmalloc (sizeof (char *) * (i + 2)); memcpy (grent.gr_mem, grp->gr_mem, sizeof (char *) * (i + 2)); grent.gr_mem[i] = xstrdup (name); grent.gr_mem[i + 1] = (char *) 0; return !gr_update (&grent); } /* * The group did not exist, so I try to figure out what the GID is * going to be. The gid parameter is probably "", meaning I figure * out the GID from the password file. I want the UID and GID to * match, unless the GID is already used. */ if (gid[0] == '\0') { i = 100; for (pw_rewind (); (pwd = pw_next ());) { if (pwd->pw_uid >= i) i = pwd->pw_uid + 1; } for (gr_rewind (); (grp = gr_next ());) { if (grp->gr_gid == i) { i = -1; break; } } } else if (gid[0] >= '0' && gid[0] <= '9') { /* * The GID is a number, which means either this is a brand * new group, or an existing group. For existing groups I * just add myself as a member, just like I did earlier. */ i = atoi (gid); for (gr_rewind (); (grp = gr_next ());) if (grp->gr_gid == i) goto add_member; } else /* * The last alternative is that the GID is a name which is * not already the name of an existing group, and I need to * figure out what group ID that group name is going to * have. */ i = -1; /* * If I don't have a group ID by now, I'll go get the next one. */ if (i == -1) { for (i = 100, gr_rewind (); (grp = gr_next ());) if (grp->gr_gid >= i) i = grp->gr_gid + 1; } /* * Now I have all of the fields required to create the new group. */ if (gid[0] && (gid[0] <= '0' || gid[0] >= '9')) grent.gr_name = xstrdup (gid); else grent.gr_name = xstrdup (name); grent.gr_passwd = "x"; /* XXX warning: const */ grent.gr_gid = i; members[0] = xstrdup (name); members[1] = (char *) 0; grent.gr_mem = members; *ngid = grent.gr_gid; return !gr_update (&grent); } /* * add_user - create a new user ID */ static int add_user (const char *name, const char *uid, uid_t * nuid, gid_t gid) { const struct passwd *pwd; struct passwd pwent; uid_t i; /* * The first guess for the UID is either the numerical UID that the * caller provided, or the next available UID. */ if (uid[0] >= '0' && uid[0] <= '9') { i = atoi (uid); } else if (uid[0] && (pwd = pw_locate (uid))) { i = pwd->pw_uid; } else { i = 100; for (pw_rewind (); (pwd = pw_next ());) if (pwd->pw_uid >= i) i = pwd->pw_uid + 1; } /* * I don't want to fill in the entire password structure members * JUST YET, since there is still more data to be added. So, I fill * in the parts that I have. */ pwent.pw_name = xstrdup (name); pwent.pw_passwd = "x"; /* XXX warning: const */ pwent.pw_uid = i; pwent.pw_gid = gid; pwent.pw_gecos = ""; /* XXX warning: const */ pwent.pw_dir = ""; /* XXX warning: const */ pwent.pw_shell = ""; /* XXX warning: const */ *nuid = i; return !pw_update (&pwent); } static void update_passwd (struct passwd *pwd, const char *passwd) { pwd->pw_passwd = pw_encrypt (passwd, crypt_make_salt ()); } /* * add_passwd - add or update the encrypted password */ static int add_passwd (struct passwd *pwd, const char *passwd) { const struct spwd *sp; struct spwd spent; /* * In the case of regular password files, this is real easy - pwd * points to the entry in the password file. Shadow files are * harder since there are zillions of things to do ... */ if (!is_shadow) { update_passwd (pwd, passwd); return 0; } /* * Do the first and easiest shadow file case. The user already * exists in the shadow password file. */ if ((sp = spw_locate (pwd->pw_name))) { spent = *sp; spent.sp_pwdp = pw_encrypt (passwd, crypt_make_salt ()); return !spw_update (&spent); } /* * Pick the next easiest case - the user has an encrypted password * which isn't equal to "x". The password was set to "x" earlier * when the entry was created, so this user would have to have had * the password set someplace else. */ if (strcmp (pwd->pw_passwd, "x") != 0) { update_passwd (pwd, passwd); return 0; } /* * Now the really hard case - I need to create an entirely new * shadow password file entry. */ spent.sp_namp = pwd->pw_name; spent.sp_pwdp = pw_encrypt (passwd, crypt_make_salt ()); spent.sp_lstchg = time ((time_t *) 0) / SCALE; spent.sp_min = getdef_num ("PASS_MIN_DAYS", 0); /* 10000 is infinity this week */ spent.sp_max = getdef_num ("PASS_MAX_DAYS", 10000); spent.sp_warn = getdef_num ("PASS_WARN_AGE", -1); spent.sp_inact = -1; spent.sp_expire = -1; spent.sp_flag = -1; return !spw_update (&spent); } #ifdef USE_PAM static struct pam_conv conv = { misc_conv, NULL }; #endif /* USE_PAM */ int main (int argc, char **argv) { char buf[BUFSIZ]; char *fields[8]; int nfields; char *cp; const struct passwd *pw; struct passwd newpw; int errors = 0; int line = 0; uid_t uid; gid_t gid; #ifdef USE_PAM pam_handle_t *pamh = NULL; struct passwd *pampw; int retval; #endif Prog = Basename (argv[0]); setlocale (LC_ALL, ""); bindtextdomain (PACKAGE, LOCALEDIR); textdomain (PACKAGE); if (argc > 1 && argv[1][0] == '-') usage (); #ifdef USE_PAM retval = PAM_SUCCESS; pampw = getpwuid (getuid ()); if (pampw == NULL) { retval = PAM_USER_UNKNOWN; } if (retval == PAM_SUCCESS) { retval = pam_start ("newusers", pampw->pw_name, &conv, &pamh); } if (retval == PAM_SUCCESS) { retval = pam_authenticate (pamh, 0); if (retval != PAM_SUCCESS) { pam_end (pamh, retval); } } if (retval == PAM_SUCCESS) { retval = pam_acct_mgmt (pamh, 0); if (retval != PAM_SUCCESS) { pam_end (pamh, retval); } } if (retval != PAM_SUCCESS) { fprintf (stderr, _("%s: PAM authentication failed\n"), Prog); exit (1); } #endif /* USE_PAM */ if (argc == 2) { if (!freopen (argv[1], "r", stdin)) { snprintf (buf, sizeof buf, "%s: %s", Prog, argv[1]); perror (buf); exit (1); } } /* * Lock the password files and open them for update. This will bring * all of the entries into memory where they may be searched for an * modified, or new entries added. The password file is the key - if * it gets locked, assume the others can be locked right away. */ if (!pw_lock ()) { fprintf (stderr, _("%s: can't lock /etc/passwd.\n"), Prog); exit (1); } is_shadow = spw_file_present (); if ((is_shadow && !spw_lock ()) || !gr_lock ()) { fprintf (stderr, _("%s: can't lock files, try again later\n"), Prog); (void) pw_unlock (); if (is_shadow) spw_unlock (); exit (1); } if (!pw_open (O_RDWR) || (is_shadow && !spw_open (O_RDWR)) || !gr_open (O_RDWR)) { fprintf (stderr, _("%s: can't open files\n"), Prog); (void) pw_unlock (); if (is_shadow) spw_unlock (); (void) gr_unlock (); exit (1); } /* * Read each line. The line has the same format as a password file * entry, except that certain fields are not contrained to be * numerical values. If a group ID is entered which does not already * exist, an attempt is made to allocate the same group ID as the * numerical user ID. Should that fail, the next available group ID * over 100 is allocated. The pw_gid field will be updated with that * value. */ 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; } /* * Break the string into fields and screw around with them. * There MUST be 7 colon separated fields, although the * values aren't that particular. */ for (cp = buf, nfields = 0; nfields < 7; nfields++) { fields[nfields] = cp; if ((cp = strchr (cp, ':'))) *cp++ = '\0'; else break; } if (nfields != 6) { fprintf (stderr, _("%s: line %d: invalid line\n"), Prog, line); continue; } /* * Now the fields are processed one by one. The first field * to be processed is the group name. A new group will be * created if the group name is non-numeric and does not * already exist. The named user will be the only member. If * there is no named group to be a member of, the UID will * be figured out and that value will be a candidate for a * new group, if that group ID exists, a whole new group ID * will be made up. */ if (!(pw = pw_locate (fields[0])) && add_group (fields[0], fields[3], &gid)) { fprintf (stderr, _("%s: line %d: can't create GID\n"), Prog, line); errors++; continue; } /* * Now we work on the user ID. It has to be specified either * as a numerical value, or left blank. If it is a numerical * value, that value will be used, otherwise the next * available user ID is computed and used. After this there * will at least be a (struct passwd) for the user. */ if (!pw && add_user (fields[0], fields[2], &uid, gid)) { fprintf (stderr, _("%s: line %d: can't create UID\n"), Prog, line); errors++; continue; } /* * The password, gecos field, directory, and shell fields * all come next. */ if (!(pw = pw_locate (fields[0]))) { fprintf (stderr, _("%s: line %d: cannot find user %s\n"), Prog, line, fields[0]); errors++; continue; } newpw = *pw; if (add_passwd (&newpw, fields[1])) { fprintf (stderr, _("%s: line %d: can't update password\n"), Prog, line); errors++; continue; } if (fields[4][0]) newpw.pw_gecos = fields[4]; if (fields[5][0]) newpw.pw_dir = fields[5]; if (fields[6][0]) newpw.pw_shell = fields[6]; if (newpw.pw_dir[0] && access (newpw.pw_dir, F_OK)) { if (mkdir (newpw.pw_dir, 0777 & ~getdef_num ("UMASK", 022))) fprintf (stderr, _("%s: line %d: mkdir failed\n"), Prog, line); else if (chown (newpw.pw_dir, newpw.pw_uid, newpw.pw_gid)) fprintf (stderr, _("%s: line %d: chown failed\n"), Prog, line); } /* * Update the password entry with the new changes made. */ if (!pw_update (&newpw)) { fprintf (stderr, _("%s: line %d: can't update 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); (void) gr_unlock (); if (is_shadow) spw_unlock (); (void) pw_unlock (); exit (1); } if (!pw_close () || (is_shadow && !spw_close ()) || !gr_close ()) { fprintf (stderr, _("%s: error updating files\n"), Prog); (void) gr_unlock (); if (is_shadow) spw_unlock (); (void) pw_unlock (); exit (1); } nscd_flush_cache ("passwd"); nscd_flush_cache ("group"); (void) gr_unlock (); if (is_shadow) spw_unlock (); (void) pw_unlock (); #ifdef USE_PAM if (retval == PAM_SUCCESS) { retval = pam_chauthtok (pamh, 0); if (retval != PAM_SUCCESS) { pam_end (pamh, retval); } } if (retval != PAM_SUCCESS) { fprintf (stderr, _("%s: PAM chauthtok failed\n"), Prog); exit (1); } if (retval == PAM_SUCCESS) pam_end (pamh, PAM_SUCCESS); #endif /* USE_PAM */ exit (0); /* NOT REACHED */ }