Usenet 1993 July/InfoMagic USENET CD-ROM July 1993.ISO/sources/misc/volume26/shadow/part02

Text File | 1991-11-24 | 54.2 KB | 2,444 lines

Newsgroups: comp.sources.misc
From: [e-mail] (John F Haugh II)
Subject:  v26i055:  shadow - Shadow Password Suite, Part02/11
Message-ID: <[e-mail]>
X-Md4-Signature: 6188fc99729d72bc4b581316b96e90f5
Date: Sun, 24 Nov 1991 18:49:39 GMT
Approved: [e-mail]

Submitted-by: [e-mail] (John F Haugh II)
Posting-number: Volume 26, Issue 55
Archive-name: shadow/part02
Environment: UNIX
Supersedes: shadow-2: Volume 06, Issue 22-24

#! /bin/sh
# into a shell via "sh file" or similar.  To overwrite existing files,
# type "sh file -c".
# The tool that generated this appeared in the comp.sources.unix newsgroup;
# send mail to [e-mail] if you want that tool.
# Contents:  groupadd.c passwd.c usermod.c
# Wrapped by kent@sparky on Sun Nov 24 11:03:41 1991
PATH=/bin:/usr/bin:/usr/ucb ; export PATH
echo If this archive is complete, you will see the following message:
echo '          "shar: End of archive 2 (of 11)."'
if test -f 'groupadd.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'groupadd.c'\"
else
  echo shar: Extracting \"'groupadd.c'\" \(7395 characters\)
  sed "s/^X//" >'groupadd.c' <<'END_OF_FILE'
X/*
X * Copyright 1991, John F. Haugh II
X * All rights reserved.
X *
X * Permission is granted to copy and create derivative works for any
X * non-commercial purpose, provided this copyright notice is preserved
X * in all copies of source code, or included in human readable form
X * and conspicuously displayed on all copies of object code or
X * distribution media.
X */
X
X#ifndef lint
Xstatic    char    sccsid[] = "@(#)groupadd.c    3.3    08:43:44    9/12/91";
X#endif
X
X#include <sys/types.h>
X#include <stdio.h>
X#include <grp.h>
X#include <ctype.h>
X#include <fcntl.h>
X
X#ifdef    BSD
X#include <strings.h>
X#else
X#include <string.h>
X#endif
X
X#include "config.h"
X#include "shadow.h"
X
X#ifdef    USE_SYSLOG
X#include <syslog.h>
X#endif
X
Xchar    group_name[BUFSIZ];
Xint    group_id;
X
Xchar    *Prog;
X
Xint    oflg;    /* permit non-unique group ID to be specified with -g         */
Xint    gflg;    /* ID value for the new group                                 */
X
X#ifdef    NDBM
Xextern    int    gr_dbm_mode;
Xextern    int    sg_dbm_mode;
X#endif
Xextern    char    *malloc();
X
Xextern    struct    group    *getgrnam();
Xextern    struct    group    *gr_next();
Xextern    int    gr_lock();
Xextern    int    gr_unlock();
Xextern    int    gr_rewind();
Xextern    int    gr_open();
X
X#ifdef    SHADOWGRP
Xextern    int    sgr_lock();
Xextern    int    sgr_unlock();
Xextern    int    sgr_open();
X#endif
X
X/*
X * usage - display usage message and exit
X */
X
Xusage ()
X{
X    fprintf (stderr, "usage: groupadd [-g gid [-o]] group\n");
X    exit (2);
X}
X
X/*
X * new_grent - initialize the values in a group file entry
X *
X *    new_grent() takes all of the values that have been entered and
X *    fills in a (struct group) with them.
X */
X
Xvoid
Xnew_grent (grent)
Xstruct    group    *grent;
X{
X    static    char    *empty_list = 0;
X
X    memset (grent, 0, sizeof *grent);
X    grent->gr_name = group_name;
X    grent->gr_passwd = "*";
X    grent->gr_gid = group_id;
X    grent->gr_mem = &empty_list;
X}
X
X#ifdef    SHADOWGRP
X/*
X * new_sgent - initialize the values in a shadow group file entry
X *
X *    new_sgent() takes all of the values that have been entered and
X *    fills in a (struct sgrp) with them.
X */
X
Xvoid
Xnew_sgent (sgent)
Xstruct    sgrp    *sgent;
X{
X    static    char    *empty_list = 0;
X
X    memset (sgent, 0, sizeof *sgent);
X    sgent->sg_name = group_name;
X    sgent->sg_passwd = "!";
X    sgent->sg_adm = &empty_list;
X    sgent->sg_mem = &empty_list;
X}
X#endif    /* SHADOWGRP */
X
X/*
X * grp_update - add new group file entries
X *
X *    grp_update() writes the new records to the group files.
X */
X
Xvoid
Xgrp_update ()
X{
X    struct    group    grp;
X#ifdef    SHADOWGRP
X    struct    sgrp    sgrp;
X#endif    /* SHADOWGRP */
X
X    /*
X     * Create the initial entries for this new group.
X     */
X
X    new_grent (&grp);
X#ifdef    SHADOWGRP
X    new_sgent (&sgrp);
X#endif    /* SHADOWGRP */
X
X    /*
X     * Write out the new group file entry.
X     */
X
X    if (! gr_update (&grp)) {
X        fprintf (stderr, "%s: error adding new group entry\n", Prog);
X        exit (1);
X    }
X#ifdef    NDBM
X
X    /*
X     * Update the DBM group file with the new entry as well.
X     */
X
X    if (! gr_dbm_update (&grp)) {
X        fprintf (stderr, "%s: cannot add new dbm group entry\n", Prog);
X        exit (1);
X    }
X    endgrent ();
X#endif    /* NDBM */
X
X#ifdef    SHADOWGRP
X
X    /*
X     * Write out the new shadow group entries as well.
X     */
X
X    if (! sgr_update (&sgrp)) {
X        fprintf (stderr, "%s: error adding new group entry\n", Prog);
X        exit (1);
X    }
X#ifdef    NDBM
X
X    /*
X     * Update the DBM group file with the new entry as well.
X     */
X
X    if (! sgr_dbm_update (&sgrp)) {
X        fprintf (stderr, "%s: cannot add new dbm group entry\n", Prog);
X        exit (1);
X    }
X    endsgent ();
X#endif    /* NDBM */
X#endif    /* SHADOWGRP */
X#ifdef    USE_SYSLOG
X    syslog (LOG_INFO, "new group: name=%s, gid=%d\n",
X        group_name, group_id);
X#endif    /* USE_SYSLOG */
X}
X
X/*
X * find_new_gid - find the next available GID
X *
X *    find_new_gid() locates the next highest unused GID in the group
X *    file, or checks the given group ID against the existing ones for
X *    uniqueness.
X */
X
Xvoid
Xfind_new_gid ()
X{
X    struct    group    *grp;
X
X    /*
X     * Start with some GID value if the user didn't provide us with
X     * one already.
X     */
X
X    if (! gflg)
X        group_id = 100;
X
X    /*
X     * Search the entire group file, either looking for this
X     * GID (if the user specified one with -g) or looking for the
X     * largest unused value.
X     */
X
X    for (gr_rewind (), grp = gr_next ();grp;grp = gr_next ()) {
X        if (strcmp (group_name, grp->gr_name) == 0) {
X            fprintf (stderr, "%s: name %s is not unique\n",
X                Prog, group_name);
X            exit (1);
X        }
X        if (gflg && group_id == grp->gr_gid) {
X            fprintf (stderr, "%s: gid %d is not unique\n",
X                Prog, group_id);
X            exit (1);
X        }
X        if (! gflg && grp->gr_gid >= group_id)
X            group_id = grp->gr_gid + 1;
X    }
X}
X
X/*
X * process_flags - perform command line argument setting
X *
X *    process_flags() interprets the command line arguments and sets
X *    the values that the user will be created with accordingly.  The
X *    values are checked for sanity.
X */
X
Xvoid
Xprocess_flags (argc, argv)
Xint    argc;
Xchar    **argv;
X{
X    extern    int    optind;
X    extern    char    *optarg;
X    char    *end;
X    int    arg;
X
X    while ((arg = getopt (argc, argv, "og:")) != EOF) {
X        switch (arg) {
X            case 'g':
X                gflg++;
X                if (! isdigit (optarg[0]))
X                    usage ();
X
X                group_id = strtol (optarg, &end, 10);
X                if (*end != '\0') {
X                    fprintf (stderr, "%s: invalid group %s\n",
X                        Prog, optarg);
X                    exit (3);
X                }
X                break;
X            case 'o':
X                if (! gflg)
X                    usage ();
X
X                oflg++;
X                break;
X            default:
X                usage ();
X        }
X    }
X    if (! gflg)
X        find_new_gid ();
X
X    if (optind == argc - 1)
X        strcpy (group_name, argv[argc - 1]);
X    else
X        usage ();
X}
X
X/*
X * close_files - close all of the files that were opened
X *
X *    close_files() closes all of the files that were opened for this
X *    new group.  This causes any modified entries to be written out.
X */
X
Xclose_files ()
X{
X    if (! gr_close ()) {
X        fprintf (stderr, "%s: cannot rewrite group file\n", Prog);
X        exit (1);
X    }
X    (void) gr_unlock ();
X#ifdef    SHADOWGRP
X    if (! sgr_close ()) {
X        fprintf (stderr, "%s: cannot rewrite shadow group file\n",
X            Prog);
X        exit (1);
X    }
X    (void) sgr_unlock ();
X#endif    /* SHADOWGRP */
X}
X
X/*
X * open_files - lock and open the group files
X *
X *    open_files() opens the two group files.
X */
X
Xopen_files ()
X{
X    if (! gr_lock ()) {
X        fprintf (stderr, "%s: unable to lock group file\n", Prog);
X        exit (1);
X    }
X    if (! gr_open (O_RDWR)) {
X        fprintf (stderr, "%s: unable to open group file\n", Prog);
X        exit (1);
X    }
X#ifdef    SHADOWGRP
X    if (! sgr_lock ()) {
X        fprintf (stderr, "%s: unable to lock shadow group file\n",
X            Prog);
X        exit (1);
X    }
X    if (! sgr_open (O_RDWR)) {
X        fprintf (stderr, "%s: unable to open shadow group file\n",
X            Prog);
X        exit (1);
X    }
X#endif    /* SHADOWGRP */
X}
X
X/*
X * main - useradd command
X */
X
Xmain (argc, argv)
Xint    argc;
Xchar    **argv;
X{
X
X    /*
X     * Get my name so that I can use it to report errors.
X     */
X
X    if (Prog = strrchr (argv[0], '/'))
X        Prog++;
X    else
X        Prog = argv[0];
X
X#ifdef    USE_SYSLOG
X    openlog (Prog, LOG_PID|LOG_CONS|LOG_NOWAIT, LOG_AUTH);
X#endif    /* USE_SYSLOG */
X
X    /*
X     * The open routines for the DBM files don't use read-write
X     * as the mode, so we have to clue them in.
X     */
X
X#ifdef    NDBM
X    gr_dbm_mode = O_RDWR;
X#ifdef    SHADOWGRP
X    sg_dbm_mode = O_RDWR;
X#endif    /* SHADOWGRP */
X#endif    /* NDBM */
X    process_flags (argc, argv);
X
X    /*
X     * Start with a quick check to see if the group exists.
X     */
X
X    if (getgrnam (group_name)) {
X        fprintf (stderr, "%s: group %s exists\n", Prog, group_name);
X        exit (9);
X    }
X
X    /*
X     * Do the hard stuff - open the files, create the group entries,
X     * then close and update the files.
X     */
X
X    open_files ();
X
X    grp_update ();
X
X    close_files ();
X    exit (0);
X    /*NOTREACHED*/
X}
END_OF_FILE
  if test 7395 -ne `wc -c <'groupadd.c'`; then
    echo shar: \"'groupadd.c'\" unpacked with wrong size!
  fi
  # end of 'groupadd.c'
fi
if test -f 'passwd.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'passwd.c'\"
else
  echo shar: Extracting \"'passwd.c'\" \(18487 characters\)
  sed "s/^X//" >'passwd.c' <<'END_OF_FILE'
X/*
X * Copyright 1989, 1990, 1991, John F. Haugh II
X * All rights reserved.
X *
X * Permission is granted to copy and create derivative works for any
X * non-commercial purpose, provided this copyright notice is preserved
X * in all copies of source code, or included in human readable form
X * and conspicuously displayed on all copies of object code or
X * distribution media.
X */
X
X#include <sys/types.h>
X#include <time.h>
X#include <stdio.h>
X#include <fcntl.h>
X#include <signal.h>
X
X#ifndef    lint
Xstatic    char    sccsid[] = "@(#)passwd.c    3.6    08:43:55    9/12/91";
X#endif
X
X/*
X * Set up some BSD defines so that all the BSD ifdef's are
X * kept right here
X */
X
X#ifndef    BSD
X#include <string.h>
X#include <memory.h>
X#define    bzero(a,n)    memset(a, 0, n)
X#else
X#include <strings.h>
X#define    strchr    index
X#define    strrchr    rindex
X#endif
X
X#include "config.h"
X#include "pwd.h"
X#include "lastlog.h"
X#include "shadow.h"
X
X#ifdef    USE_SYSLOG
X#include <syslog.h>
X
X#ifndef    LOG_WARN
X#define    LOG_WARN    LOG_WARNING
X#endif
X#endif
X
X/*
X * Password aging constants
X *
X *    DAY - seconds in a day
X *    WEEK - seconds in a week
X *    SCALE - convert from clock to aging units
X */
X
X#define    DAY    (24L*3600L)
X#define    WEEK    (7L*DAY)
X
X#ifdef    ITI_AGING
X#define    SCALE    (1)
X#else
X#define    SCALE    DAY
X#endif
X
X/*
X * Global variables
X */
X
Xchar    name[32];        /* The user's name */
Xchar    *Prog;            /* Program name */
Xint    amroot;            /* The real UID was 0 */
X
X/*
X * External identifiers
X */
X
Xextern    char    *getpass();
Xextern    char    *pw_encrypt();
Xextern    char    *getlogin();
Xextern    int    optind;        /* Index into argv[] for current option */
Xextern    char    *optarg;    /* Pointer to current option value */
X#ifdef    NDBM
Xextern    int    sp_dbm_mode;
Xextern    int    pw_dbm_mode;
X#endif
X
X/*
X * #defines for messages.  This facilities foreign language conversion
X * since all messages are defined right here.
X */
X
X#define    USAGE        "usage: %s [ -f | -s ] [ name ]\n"
X#define    ADMUSAGE \
X    "       %s [ -x max ] [ -n min ] [ -w warn ] [ -i inact ] name\n"
X#define    ADMUSAGE2 \
X    "       %s { -l | -d | -S } name\n"
X#define    OLDPASS        "Old Password:"
X#define    NEWPASSMSG \
X"Enter the new password (minimum of 5 characters)\n\
XPlease use a combination of upper and lower case letters and numbers.\n"
X#define    CHANGING    "Changing password for %s\n"
X#define NEWPASS        "New Password:"
X#define    NEWPASS2    "Re-enter new password:"
X#define    WRONGPWD    "Incorrect password for %s.\n"
X#define    WRONGPWD2    "incorrect password for `%s'\n"
X#define    NOMATCH        "They don't match; try again.\n"
X#define    CANTCHANGE    "The password for %s cannot be changed.\n"
X#define    CANTCHANGE2    "password locked for `%s'\n"
X#define    TOOSOON        "Sorry, the password for %s cannot be changed yet.\n"
X#define    TOOSOON2    "now < sp_min for `%s'\n"
X#define    EXECFAILED    "%s: Cannot execute %s"
X#define    EXECFAILED2    "cannot execute %s\n"
X#define    WHOAREYOU    "%s: Cannot determine you user name.\n"
X#define    UNKUSER        "%s: Unknown user %s\n"
X#define    NOPERM        "You may not change the password for %s.\n"
X#define    NOPERM2        "can't change pwd for `%s'\n"
X#define    UNCHANGED    "The password for %s is unchanged.\n"
X#define    SPWDBUSY    "Cannot lock the password file; try again later.\n"
X#define    SPWDBUSY2    "can't lock /etc/shadow\n"
X#define    OPNERROR    "Cannot open the password file.\n"
X#define    OPNERROR2    "can't open /etc/shadow\n"
X#define    UPDERROR    "Error updating the password entry.\n"
X#define    UPDERROR2    "error updating shadow entry\n"
X#define    DBMERROR    "Error updating the DBM password entry.\n"
X#define    DBMERROR2    "error updating DBM shadow entry.\n"
X#define    NOTROOT        "Cannot change ID to root.\n"
X#define    NOTROOT2    "can't setuid(0).\n"
X#define    CLSERROR    "Cannot commit shadow file changes.\n"
X#define    CLSERROR2    "can't rewrite /etc/shadow.\n"
X#define    UNLKERROR    "Cannot unlock the shadow file.\n"
X#define    UNLKERROR2    "can't unlock /etc/shadow.\n"
X#define    TRYAGAIN    "Try again.\n"
X#define    CHGPASSWD    "changed password for `%s'\n"
X
X/*
X * usage - print command usage and exit
X */
X
Xvoid
Xusage ()
X{
X    fprintf (stderr, USAGE, Prog);
X    if (amroot) {
X        fprintf (stderr, ADMUSAGE, Prog);
X        fprintf (stderr, ADMUSAGE2, Prog);
X    }
X    exit (1);
X}
X
X/*
X * new_password - validate old password and replace with new
X */
X
X/*ARGSUSED*/
Xint
Xnew_password (pw, sp)
Xstruct    passwd    *pw;
Xstruct    spwd    *sp;
X{
X    char    *clear;        /* Pointer to clear text */
X    char    *cipher;    /* Pointer to cipher text */
X    char    *cp;        /* Pointer to getpass() response */
X    char    orig[BUFSIZ];    /* Original password */
X    char    pass[BUFSIZ];    /* New password */
X    int    i;        /* Counter for retries */
X
X    /*
X     * Authenticate the user.  The user will be prompted for their
X     * own password.
X     */
X
X    if (! amroot && sp->sp_pwdp[0]) {
X        bzero (orig, sizeof orig);
X
X        if (! (clear = getpass (OLDPASS)))
X            return -1;
X
X        cipher = pw_encrypt (clear, sp->sp_pwdp);
X        if (strcmp (cipher, sp->sp_pwdp) != 0) {
X            sleep (1);
X            fprintf (stderr, WRONGPWD, sp->sp_namp);
X#ifdef    USE_SYSLOG
X            syslog (LOG_WARN, WRONGPWD2, sp->sp_namp);
X#endif
X            return -1;
X        }
X        strcpy (orig, clear);
X        bzero (cipher, strlen (cipher));
X        bzero (clear, strlen (clear));
X    }
X
X    /*
X     * Get the new password.  The user is prompted for the new password
X     * and has three tries to get it right.  The password will be tested
X     * for strength, unless it is the root user.  This provides an escape
X     * for initial login passwords.
X     */
X
X    printf (NEWPASSMSG);
X    for (i = 0;i < 3;i++) {
X        if (! (cp = getpass (NEWPASS))) {
X            bzero (orig, sizeof orig);
X            return -1;
X        } else
X            strcpy (pass, cp);
X
X        if (! amroot && ! obscure (orig, pass)) {
X            printf (TRYAGAIN);
X            continue;
X        }
X        if (! (cp = getpass (NEWPASS2))) {
X            bzero (orig, sizeof orig);
X            return -1;
X        }
X        if (strcmp (cp, pass))
X            fprintf (stderr, NOMATCH);
X        else {
X            bzero (cp, strlen (cp));
X            break;
X        }
X    }
X    bzero (orig, sizeof orig);
X
X    if (i == 3) {
X        bzero (pass, sizeof pass);
X        return -1;
X    }
X
X    /*
X     * Encrypt the password.  The new password is encrypted and
X     * the shadow password structure updated to reflect the change.
X     */
X
X    sp->sp_pwdp = pw_encrypt (pass, (char *) 0);
X    sp->sp_lstchg = time ((time_t *) 0) / SCALE;
X    bzero (pass, sizeof pass);
X
X    return 0;
X}
X
X/*
X * check_password - test a password to see if it can be changed
X *
X *    check_password() sees if the invoker has permission to change the
X *    password for the given user.
X */
X
X/*ARGSUSED*/
Xvoid
Xcheck_password (pw, sp)
Xstruct    passwd    *pw;
Xstruct    spwd    *sp;
X{
X    time_t    now = time ((time_t *) 0) / SCALE;
X
X    /*
X     * Root can change any password any time.
X     */
X
X    if (amroot)
X        return;
X
X    /*
X     * Expired accounts cannot be changed ever.  Passwords
X     * which are locked may not be changed.  Passwords where
X     * min > max may not be changed.  Passwords which have
X     * been inactive too long cannot be changed.
X     */
X
X    if ((sp->sp_expire > 0 && now >= sp->sp_expire) ||
X        (sp->sp_inact >= 0 && sp->sp_max >= 0 &&
X        now >= (sp->sp_lstchg + sp->sp_inact + sp->sp_max)) ||
X            strcmp (sp->sp_pwdp, "!") == 0 ||
X            sp->sp_min > sp->sp_max) {
X        fprintf (stderr, CANTCHANGE, sp->sp_namp);
X#ifdef    USE_SYSLOG
X        syslog (LOG_WARN, CANTCHANGE2, sp->sp_namp);
X        closelog ();
X#endif
X        exit (1);
X    }
X
X    /*
X     * Passwords may only be changed after sp_min time is up.
X     */
X
X    if (sp->sp_min >= 0 && now < (sp->sp_lstchg + sp->sp_min)) {
X        fprintf (stderr, TOOSOON, sp->sp_namp);
X#ifdef    USE_SYSLOG
X        syslog (LOG_WARN, TOOSOON2, sp->sp_namp);
X        closelog ();
X#endif
X        exit (1);
X    }
X}
X
X/*
X * pwd_to_spwd - create entries for new spwd structure
X *
X *    pwd_to_spwd() creates a new (struct spwd) containing the
X *    information in the pointed-to (struct passwd).
X */
X
Xvoid
Xpwd_to_spwd (pw, sp)
Xstruct    passwd    *pw;
Xstruct    spwd    *sp;
X{
X    time_t    t;
X
X    /*
X     * Nice, easy parts first.  The name and passwd map directly
X     * from the old password structure to the new one.
X     */
X
X    sp->sp_namp = strdup (pw->pw_name);
X    sp->sp_pwdp = strdup (pw->pw_passwd);
X#ifdef    ATT_AGE
X
X    /*
X     * AT&T-style password aging maps the sp_min, sp_max, and
X     * sp_lstchg information from the pw_age field, which appears
X     * after the encrypted password.
X     */
X
X    if (pw->pw_age[0]) {
X        t = (c64i (pw->pw_age[0]) * WEEK) / SCALE;
X        sp->sp_max = t;
X
X        if (pw->pw_age[1]) {
X            t = (c64i (pw->pw_age[1]) * WEEK) / SCALE;
X            sp->sp_min = t;
X        } else
X            sp->sp_min = (10000L * DAY) / SCALE;
X
X        if (pw->pw_age[1] && pw->pw_age[2]) {
X            t = (a64l (pw->pw_age + 2) * WEEK) / SCALE;
X            sp->sp_lstchg = t;
X        } else
X            sp->sp_lstchg = time ((time_t *) 0) / SCALE;
X    } else {
X        sp->sp_min = 0;
X        sp->sp_max = (10000L * DAY) / SCALE;
X        sp->sp_lstchg = time ((time_t *) 0) / SCALE;
X    }
X#else
X    /*
X     * BSD does not use the pw_age field and has no aging information
X     * anywheres.  The default values are used to initialize the
X     * fields which are in the missing pw_age field;
X     */
X
X    sp->sp_min = 0;
X    sp->sp_max = (10000L * DAY) / SCALE;
X    sp->sp_lstchg = time ((time_t *) 0) / SCALE;
X#endif
X
X    /*
X     * These fields have no corresponding information in the password
X     * file.  They are set to uninitialized values.
X     */
X
X    sp->sp_warn = -1;
X    sp->sp_inact = -1;
X    sp->sp_expire = -1;
X    sp->sp_flag = -1;
X}
X
X/*
X * print_status - print current password status
X */
X
X/*ARGSUSED*/
Xvoid
Xprint_status (pw, sp)
Xstruct    passwd    *pw;
Xstruct    spwd    *sp;
X{
X    struct    tm    *tm;
X    time_t    last_time;
X
X    last_time = sp->sp_lstchg * SCALE;
X    tm = gmtime (&last_time);
X
X    printf ("%s ", sp->sp_namp);
X    printf ("%s ",
X        sp->sp_pwdp[0] ? (sp->sp_pwdp[0] == '!' ? "L":"P"):"NP");
X    printf ("%02.2d/%02.2d/%02.2d ",
X        tm->tm_mon + 1, tm->tm_mday, tm->tm_year % 100);
X    printf ("%d %d %d %d\n",
X        (sp->sp_min * SCALE) / DAY, (sp->sp_max * SCALE) / DAY,
X        (sp->sp_warn * SCALE) / DAY, (sp->sp_inact * SCALE) / DAY);
X}
X
X/*
X * passwd - change a user's password file information
X *
X *    This command controls the password file and commands which are
X *     used to modify it.
X *
X *    The valid options are
X *
X *    -l    lock the named account (*)
X *    -d    delete the password for the named account (*)
X *    -x #    set sp_max to # days (*)
X *    -n #    set sp_min to # days (*)
X *    -w #    set sp_warn to # days (*)
X *    -i #    set sp_inact to # days (*)
X *    -S    show password status of named account (*)
X *    -g    execute gpasswd command to interpret flags
X *    -f    execute chfn command to interpret flags
X *    -s    execute chsh command to interpret flags
X *
X *    (*) requires root permission to execute.
X *
X *    All of the time fields are entered in days and converted to the
X *     appropriate internal format.  For finer resolute the chage
X *    command must be used.
X */
X
Xint
Xmain (argc, argv)
Xint    argc;
Xchar    **argv;
X{
X    char    buf[BUFSIZ];        /* I/O buffer for messages, etc.      */
X    char    *cp;            /* Miscellaneous character pointing   */
X    time_t    min;            /* Minimum days before change         */
X    time_t    max;            /* Maximum days until change          */
X    time_t    warn;            /* Warning days before change         */
X    time_t    inact;            /* Days without change before locked  */
X    int    i;            /* Loop control variable              */
X    int    flag;            /* Current option to process          */
X    int    lflg = 0;        /* -l - lock account option           */
X    int    dflg = 0;        /* -d - delete password option        */
X    int    xflg = 0;        /* -x - set maximum days              */
X    int    nflg = 0;        /* -n - set minimum days              */
X    int    wflg = 0;        /* -w - set warning days              */
X    int    iflg = 0;        /* -i - set inactive days             */
X    int    Sflg = 0;        /* -S - show password status          */
X    struct    passwd    *pw;        /* Password file entry for user       */
X    struct    spwd    *sp;        /* Shadow file entry for user         */
X    struct    spwd    tspwd;        /* New shadow file entry if none      */
X
X    /*
X     * The program behaves differently when executed by root
X     * than when executed by a normal user.
X     */
X
X    amroot = getuid () == 0;
X#ifdef    NDBM
X    sp_dbm_mode = O_RDWR;
X    pw_dbm_mode = O_RDWR;
X#endif
X
X    /*
X     * Get the program name.  The program name is used as a
X     * prefix to most error messages.  It is also used as input
X     * to the openlog() function for error logging.
X     */
X
X    if (Prog = strrchr (argv[0], '/'))
X        Prog++;
X    else
X        Prog = argv[0];
X
X#ifdef    USE_SYSLOG
X    openlog (Prog, LOG_PID|LOG_CONS|LOG_NOWAIT, LOG_AUTH);
X#endif
X
X    /*
X     * Start with the flags which cause another command to be
X     * executed.  The effective UID will be set back to the
X     * real UID and the new command executed with the flags
X     */
X
X    if (argc > 1 && argv[1][0] == '-' && strchr ("gfs", argv[1][1])) {
X        setuid (getuid ());
X        switch (argv[1][1]) {
X            case 'g':
X                argv[1] = "gpasswd";
X                execv ("/bin/gpasswd", &argv[1]);
X                break;
X            case 'f':
X                argv[1] = "chfn";
X                execv ("/bin/chfn", &argv[1]);
X                break;
X            case 's':
X                argv[1] = "chsh";
X                execv ("/bin/chsh", &argv[1]);
X                break;
X            default:
X                usage ();
X        }
X        sprintf (buf, EXECFAILED, Prog, argv[1]);
X        perror (buf);
X#ifdef    USE_SYSLOG
X        syslog (LOG_CRIT, EXECFAILED2, argv[1]);
X        closelog ();
X#endif
X        exit (1);
X    }
X
X    /*
X     * The remaining arguments will be processed one by one and
X     * executed by this command.  The name is the last argument
X     * if it does not begin with a "-", otherwise the name is
X     * determined from the environment and must agree with the
X     * real UID.  Also, the UID will be checked for any commands
X     * which are restricted to root only.
X     */
X
X    while ((flag = getopt (argc, argv, "ldx:n:w:i:S")) != EOF) {
X        switch (flag) {
X            case 'x':
X                max = strtol (optarg, &cp, 10);
X                if (*cp || getuid ())
X                    usage ();
X
X                xflg++;
X                break;
X            case 'n':
X                min = strtol (optarg, &cp, 10);
X                if (*cp || getuid ())
X                    usage ();
X
X                nflg++;
X                break;
X            case 'w':
X                warn = strtol (optarg, &cp, 10);
X                if (*cp || getuid ())
X                    usage ();
X
X                wflg++;
X                break;
X            case 'i':
X                inact = strtol (optarg, &cp, 10);
X                if (*cp || getuid ())
X                    usage ();
X
X                iflg++;
X                break;
X            case 'S':
X                if (getuid ())
X                    usage ();
X
X                Sflg++;
X                break;
X            case 'd':
X                dflg++;
X                break;
X            case 'l':
X                lflg++;
X                break;
X            default:
X                usage ();
X        }
X    }
X
X    /*
X     * If any of the flags were given, a user name must be supplied
X     * on the command line.  Only an unadorned command line doesn't
X     * require the user's name be given.  Also, on -x, -n, -m, and
X     * -i may appear with each other.  -d, -l and -S must appear alone.
X     */
X
X    if ((dflg || lflg || xflg || nflg ||
X                wflg || iflg || Sflg) && optind >= argc)
X        usage ();
X
X    if ((dflg + lflg + (xflg || nflg || wflg || iflg) + Sflg) > 1)
X        usage ();
X
X    /*
X     * Now I have to get the user name.  The name will be gotten
X     * from the command line if possible.  Otherwise it is figured
X     * out from the environment.
X     */
X
X    if (optind < argc) {
X        strncpy (name, argv[optind], sizeof name);
X        name[sizeof name - 1] = '\0';
X    } else if (amroot) {
X        strcpy (name, "root");
X    } else if (cp = getlogin ()) {
X        strncpy (name, cp, sizeof name);
X        name[sizeof name - 1] = '\0';
X    } else {
X        fprintf (stderr, WHOAREYOU, Prog);
X#ifdef    USE_SYSLOG
X        closelog ();
X#endif
X        exit (1);
X    }
X
X    /*
X     * Now I have a name, let's see if the UID for the name
X     * matches the current real UID.
X     */
X
X    if (! (pw = getpwnam (name))) {
X        fprintf (stderr, UNKUSER, Prog, name);
X#ifdef    USE_SYSLOG
X        closelog ();
X#endif
X        exit (1);
X    }
X    if (! amroot && pw->pw_uid != getuid ()) {
X        fprintf (stderr, NOPERM, name);
X#ifdef    USE_SYSLOG
X        syslog (LOG_WARN, NOPERM2, name);
X        closelog ();
X#endif
X        exit (1);
X    }
X
X    /*
X     * Let the user know whose password is being changed.
X     */
X
X    if (! Sflg)
X        printf (CHANGING, name);
X
X    /*
X     * The user name is valid, so let's get the shadow file
X     * entry.
X     */
X
X    if (! (sp = getspnam (name)))
X        pwd_to_spwd (pw, sp = &tspwd);
X
X    /*
X     * Save the shadow entry off to the side so it doesn't
X     * get changed by any of the following code.
X     */
X
X    if (sp != &tspwd) {
X        tspwd = *sp;
X        sp = &tspwd;
X    }
X    tspwd.sp_namp = strdup (sp->sp_namp);
X    tspwd.sp_pwdp = strdup (sp->sp_pwdp);
X
X    if (Sflg) {
X        print_status (pw, sp);
X#ifdef    USE_SYSLOG
X        closelog ();
X#endif
X        exit (0);
X    }
X
X    /*
X     * If there are no other flags, just change the password.
X     */
X
X    if (! (dflg || lflg || xflg || nflg || wflg || iflg)) {
X
X        /*
X         * See if the user is permitted to change the password.
X         * Otherwise, go ahead and set a new password.
X         */
X
X        check_password (pw, sp);
X
X        if (new_password (pw, sp)) {
X            fprintf (stderr, UNCHANGED, name);
X#ifdef    USE_SYSLOG
X            closelog ();
X#endif
X            exit (1);
X        }
X    }
X
X    /*
X     * The other options are incredibly simple.  Just modify the
X     * field in the shadow file entry.
X     */
X
X    if (dflg)            /* Set password to blank */
X        sp->sp_pwdp = "";
X
X    if (lflg)            /* Set password to "locked" value */
X        sp->sp_pwdp = "!";
X
X    if (xflg)
X        sp->sp_max = (max * DAY) / SCALE;
X
X    if (nflg)
X        sp->sp_min = (min * DAY) / SCALE;
X
X    if (wflg)
X        sp->sp_warn = (warn * DAY) / SCALE;
X
X    if (iflg)
X        sp->sp_inact = (inact * DAY) / SCALE;
X
X    /*
X     * Before going any further, raise the ulimit to prevent
X     * colliding into a lowered ulimit, and set the real UID
X     * to root to protect against unexpected signals.  Any
X     * keyboard signals are set to be ignored.
X     */
X
X    ulimit (2, 30000);
X    if (setuid (0)) {
X        fprintf (stderr, NOTROOT);
X#ifdef    USE_SYSLOG
X        syslog (LOG_ERR, NOTROOT2);
X        closelog ();
X#endif
X        exit (1);
X    }
X    signal (SIGHUP, SIG_IGN);
X    signal (SIGINT, SIG_IGN);
X    signal (SIGQUIT, SIG_IGN);
X#ifdef    SIGTSTP
X    signal (SIGTSTP, SIG_IGN);
X#endif
X
X    /*
X     * The shadow entry is now ready to be committed back to
X     * the shadow file.  Get a lock on the file and open it.
X     */
X
X    for (i = 0;i < 30;i++)
X        if (spw_lock ())
X            break;
X
X    if (i == 30) {
X        fprintf (stderr, SPWDBUSY);
X#ifdef    USE_SYSLOG
X        syslog (LOG_WARN, SPWDBUSY2);
X        closelog ();
X#endif
X        exit (1);
X    }
X    if (! spw_open (O_RDWR)) {
X        fprintf (stderr, OPNERROR);
X#ifdef    USE_SYSLOG
X        syslog (LOG_ERR, OPNERROR2);
X        closelog ();
X#endif
X        (void) spw_unlock ();
X        exit (1);
X    }
X
X    /*
X     * Update the shadow file entry.  If there is a DBM file,
X     * update that entry as well.
X     */
X
X    if (! spw_update (sp)) {
X        fprintf (stderr, UPDERROR);
X#ifdef    USE_SYSLOG
X        syslog (LOG_ERR, UPDERROR2);
X        closelog ();
X#endif
X        (void) spw_unlock ();
X        exit (1);
X    }
X#ifdef    NDBM
X    if (access ("/etc/shadow.pag", 0) == 0 && ! sp_dbm_update (sp)) {
X        fprintf (stderr, DBMERROR);
X#ifdef    USE_SYSLOG
X        syslog (LOG_ERR, DBMERROR2);
X        closelog ();
X#endif
X        (void) spw_unlock ();
X        exit (1);
X    }
X    endspent ();
X#endif
X
X    /*
X     * Changes have all been made, so commit them and unlock the
X     * file.
X     */
X
X    if (! spw_close ()) {
X        fprintf (stderr, CLSERROR);
X#ifdef    USE_SYSLOG
X        syslog (LOG_ERR, CLSERROR2);
X        closelog ();
X#endif
X        (void) spw_unlock ();
X        exit (1);
X    }
X    if (! spw_unlock ()) {
X        fprintf (stderr, UNLKERROR);
X#ifdef    USE_SYSLOG
X        syslog (LOG_ERR, UNLKERROR2);
X        closelog ();
X#endif
X        exit (1);
X    }
X#ifdef    USE_SYSLOG
X    syslog (LOG_INFO, CHGPASSWD, name);
X    closelog ();
X#endif
X    exit (0);
X    /*NOTREACHED*/
X}
END_OF_FILE
  if test 18487 -ne `wc -c <'passwd.c'`; then
    echo shar: \"'passwd.c'\" unpacked with wrong size!
  fi
  # end of 'passwd.c'
fi
if test -f 'usermod.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'usermod.c'\"
else
  echo shar: Extracting \"'usermod.c'\" \(24732 characters\)
  sed "s/^X//" >'usermod.c' <<'END_OF_FILE'
X/*
X * Copyright 1991, John F. Haugh II
X * All rights reserved.
X *
X * Permission is granted to copy and create derivative works for any
X * non-commercial purpose, provided this copyright notice is preserved
X * in all copies of source code, or included in human readable form
X * and conspicuously displayed on all copies of object code or
X * distribution media.
X */
X
X#ifndef lint
Xstatic    char    sccsid[] = "@(#)usermod.c    3.5    14:38:40    10/27/91";
X#endif
X
X#include <sys/types.h>
X#include <sys/stat.h>
X#include <stdio.h>
X#include <errno.h>
X#include "pwd.h"
X#include <grp.h>
X#include <ctype.h>
X#include <fcntl.h>
X#include <time.h>
X
X#ifdef    BSD
X#include <strings.h>
X#else
X#include <string.h>
X#endif
X
X#include "config.h"
X#include "shadow.h"
X
X#ifdef    USE_SYSLOG
X#include <syslog.h>
X
X#ifndef    LOG_WARN
X#define    LOG_WARN LOG_WARNING
X#endif
X#endif
X
X#ifndef    NGROUPS_MAX
X#define    NGROUPS_MAX    64
X#endif
X
X#define    VALID(s)    (strcspn (s, ":\n") == strlen (s))
X
Xchar    user_name[BUFSIZ];
Xchar    user_newname[BUFSIZ];
Xuid_t    user_id;
Xuid_t    user_newid;
Xgid_t    user_gid;
Xchar    user_comment[BUFSIZ];
Xchar    user_home[BUFSIZ];
Xchar    user_newhome[BUFSIZ];
Xchar    user_shell[BUFSIZ];
Xlong    user_expire;
Xlong    user_inactive;
Xint    user_ngroups = -1;
Xgid_t    user_groups[NGROUPS_MAX];
Xstruct    passwd    user_pwd;
Xstruct    spwd    user_spwd;
X
Xchar    *Prog;
X
Xint    uflg;    /* specify user ID for new account                            */
Xint    oflg;    /* permit non-unique user ID to be specified with -u          */
Xint    gflg;    /* primary group ID  for new account                          */
Xint    Gflg;    /* secondary group set for new account                        */
Xint    dflg;    /* home directory for new account                             */
Xint    sflg;    /* shell program for new account                              */
Xint    cflg;    /* comment (GECOS) field for new account                      */
Xint    mflg;    /* create user's home directory if it doesn't exist           */
Xint    fflg;    /* days until account with expired password is locked         */
Xint    eflg;    /* days after password changed before it becomes expired      */
Xint    lflg;    /* new user name for user                                     */
X
X#ifdef    NDBM
Xextern    int    pw_dbm_mode;
Xextern    int    sp_dbm_mode;
Xextern    int    gr_dbm_mode;
X#ifdef    SHADOWGRP
Xextern    int    sg_dbm_mode;
X#endif
X#endif
Xextern    FILE    *fopen();
Xextern    int    fclose();
Xextern    char    *malloc();
Xextern    char    *mktemp();
X
Xextern    struct    group    *getgrnam();
Xextern    struct    group    *getgrgid();
Xextern    struct    group    *gr_next();
Xextern    struct    group    *gr_locate();
Xextern    int    gr_lock();
Xextern    int    gr_unlock();
Xextern    int    gr_rewind();
Xextern    int    gr_open();
X
X#ifdef    SHADOWGRP
Xextern    struct    sgrp    *sgr_next();
Xextern    int    sgr_lock();
Xextern    int    sgr_unlock();
Xextern    int    sgr_rewind();
Xextern    int    sgr_open();
X#endif
X
Xextern    struct    passwd    *getpwnam();
Xextern    struct    passwd    *pw_next();
Xextern    struct    passwd    *pw_locate();
Xextern    int    pw_lock();
Xextern    int    pw_unlock();
Xextern    int    pw_rewind();
Xextern    int    pw_open();
X
Xextern    int    spw_lock();
Xextern    int    spw_unlock();
Xextern    int    spw_open();
Xextern    struct    spwd    *spw_locate();
X
X#define    DAY    (24L*3600L)
X#define    WEEK    (7*DAY)
X
X#ifdef    ITI_AGING
X#define    SCALE    (1)
X#else
X#define    SCALE    (DAY)
X#endif
X
X/*
X * days and juldays are used to compute the number of days in the
X * current month, and the cummulative number of days in the preceding
X * months.  they are declared so that january is 1, not 0.
X */
X
Xstatic    short    days[13] = { 0,
X    31,    28,    31,    30,    31,    30,    /* JAN - JUN */
X    31,    31,    30,    31,    30,    31 };    /* JUL - DEC */
X
Xstatic    short    juldays[13] = { 0,
X    0,    31,    59,    90,    120,    151,    /* JAN - JUN */
X    181,    212,    243,    273,    304,    334 };    /* JUL - DEC */
X
X#ifdef    NEED_RENAME
X/*
X * rename - rename a file to another name
X *
X *    rename is provided for systems which do not include the rename()
X *    system call.
X */
X
Xint
Xrename (begin, end)
Xchar    *begin;
Xchar    *end;
X{
X    struct    stat    s1, s2;
X    extern    int    errno;
X    int    orig_err = errno;
X
X    if (stat (begin, &s1))
X        return -1;
X
X    if (stat (end, &s2)) {
X        errno = orig_err;
X    } else {
X
X        /*
X         * See if this is a cross-device link.  We do this to
X         * insure that the link below has a chance of working.
X         */
X
X        if (s1.st_dev != s2.st_dev) {
X            errno = EXDEV;
X            return -1;
X        }
X
X        /*
X         * See if we can unlink the existing destination
X         * file.  If the unlink works the directory is writable,
X         * so there is no need here to figure that out.
X         */
X
X        if (unlink (end))
X            return -1;
X    }
X
X    /*
X     * Now just link the original name to the final name.  If there
X     * was no file previously, this link will fail if the target
X     * directory isn't writable.  The unlink will fail if the source
X     * directory isn't writable, but life stinks ...
X     */
X
X    if (link (begin, end) || unlink (begin))
X        return -1;
X
X    return 0;
X}
X#endif
X
X/*
X * strtoday - compute the number of days since 1970.
X *
X * the total number of days prior to the current date is
X * computed.  january 1, 1970 is used as the origin with
X * it having a day number of 0.
X */
X
Xlong
Xstrtoday (str)
Xchar    *str;
X{
X    char    slop[2];
X    int    month;
X    int    day;
X    int    year;
X    long    total;
X
X    /*
X     * start by separating the month, day and year.  this is
X     * a chauvanistic program - it only takes date input in
X     * the standard USA format.
X     */
X
X    if (sscanf (str, "%d/%d/%d%c", &month, &day, &year, slop) != 3)
X        return -1;
X
X    /*
X     * the month, day of the month, and year are checked for
X     * correctness and the year adjusted so it falls between
X     * 1970 and 2069.
X     */
X
X    if (month < 1 || month > 12)
X        return -1;
X
X    if (day < 1)
X        return -1;
X
X    if ((month != 2 || (year % 4) != 0) && day > days[month])
X        return -1;
X    else if ((month == 2 && (year % 4) == 0) && day > 29)
X        return -1;
X
X    if (year < 0)
X        return -1;
X    else if (year < 69)
X        year += 2000;
X    else if (year < 99)
X        year += 1900;
X
X    if (year < 1970 || year > 2069)
X        return -1;
X
X    /*
X     * the total number of days is the total number of days in all
X     * the whole years, plus the number of leap days, plus the
X     * number of days in the whole months preceding, plus the number
X     * of days so far in the month.
X     */
X
X    total = (long) ((year - 1970) * 365L) + (((year + 1) - 1970) / 4);
X    total += (long) juldays[month] + (month > 2 && (year % 4) == 0 ? 1:0);
X    total += (long) day - 1;
X
X    return total;
X}
X
X/*
X * add_list - add a member to a list of group members
X *
X *    the array of member names is searched for the new member
X *    name, and if not present it is added to a freshly allocated
X *    list of users.
X */
X
Xchar **
Xadd_list (list, member)
Xchar    **list;
Xchar    *member;
X{
X    int    i;
X    char    **tmp;
X
X    /*
X     * Scan the list for the new name.  Return the original list
X     * pointer if it is present.
X     */
X
X    for (i = 0;list[i] != (char *) 0;i++)
X        if (strcmp (list[i], member) == 0)
X            return list;
X
X    /*
X     * Allocate a new list pointer large enough to hold all the
X     * old entries, and the new entries as well.
X     */
X
X    if (! (tmp = (char **) malloc ((i + 2) * sizeof member)))
X        return 0;
X
X    /*
X     * Copy the original list to the new list, then append the
X     * new member and NULL terminate the result.  This new list
X     * is returned to the invoker.
X     */
X
X    for (i = 0;list[i] != (char *) 0;i++)
X        tmp[i] = list[i];
X
X    tmp[i++] = strdup (member);
X    tmp[i] = (char *) 0;
X
X    return tmp;
X}
X
X/*
X * del_list - delete a member from a list of group members
X *
X *    the array of member names is searched for the old member
X *    name, and if present it is deleted from a freshly allocated
X *    list of users.
X */
X
Xchar **
Xdel_list (list, member)
Xchar    **list;
Xchar    *member;
X{
X    int    i, j;
X    char    **tmp;
X
X    /*
X     * Scan the list for the new name.  Return the original list
X     * pointer if it is present.
X     */
X
X    for (i = j = 0;list[i] != (char *) 0;i++)
X        if (strcmp (list[i], member))
X            j++;
X
X    if (j == i)
X        return list;
X
X    /*
X     * Allocate a new list pointer large enough to hold all the
X     * old entries, and the new entries as well.
X     */
X
X    if (! (tmp = (char **) malloc ((j + 2) * sizeof member)))
X        return 0;
X
X    /*
X     * Copy the original list to the new list, then append the
X     * new member and NULL terminate the result.  This new list
X     * is returned to the invoker.
X     */
X
X    for (i = j = 0;list[i] != (char *) 0;i++)
X        if (strcmp (list[i], member))
X            tmp[j++] = list[i];
X
X    tmp[j] = (char *) 0;
X
X    return tmp;
X}
X
X/*
X * get_groups - convert a list of group names to an array of group IDs
X *
X *    get_groups() takes a comma-separated list of group names and
X *    converts it to an array of group ID values.  Any unknown group
X *    names are reported as errors.
X */
X
Xint
Xget_groups (list)
Xchar    *list;
X{
X    char    *cp;
X    struct    group    *grp;
X    int    errors = 0;
X
X    /*
X     * Initialize the list to be empty
X     */
X
X    user_ngroups = 0;
X
X    if (! *list)
X        return 0;
X
X    /*
X     * So long as there is some data to be converted, strip off
X     * each name and look it up.  A mix of numerical and string
X     * values for group identifiers is permitted.
X     */
X
X    do {
X        /*
X         * Strip off a single name from the list
X         */
X
X        if (cp = strchr (list, ','))
X            *cp++ = '\0';
X
X        /*
X         * Names starting with digits are treated as numerical
X         * GID values, otherwise the string is looked up as is.
X         */
X
X        if (isdigit (*list))
X            grp = getgrgid (atoi (list));
X        else
X            grp = getgrnam (list);
X
X        /*
X         * There must be a match, either by GID value or by
X         * string name.
X         */
X
X        if (! grp) {
X            fprintf (stderr, "%s: unknown group %s\n", Prog, list);
X            errors++;
X        }
X
X        /*
X         * Add the GID value from the group file to the user's
X         * list of groups.
X         */
X
X        user_groups[user_ngroups++] = grp->gr_gid;
X
X        list = cp;
X    } while (list);
X
X    /*
X     * Any errors in finding group names are fatal
X     */
X
X    if (errors)
X        return -1;
X
X    return 0;
X}
X
X/*
X * usage - display usage message and exit
X */
X
Xusage ()
X{
X    fprintf (stderr,
X        "usage: %s [-u uid [-o]] [-g group] [-G group,...] \n", Prog);
X    fprintf (stderr,
X        "\t\t[-d home [-m]] [-s shell] [-c comment] [-l new_name]\n");
X    fprintf (stderr,
X        "\t\t[-f inactive] [-e expire] name\n");
X
X    exit (2);
X}
X
X/*
X * new_pwent - initialize the values in a password file entry
X *
X *    new_pwent() takes all of the values that have been entered and
X *    fills in a (struct passwd) with them.
X */
X
Xvoid
Xnew_pwent (pwent)
Xstruct    passwd    *pwent;
X{
X    if (lflg)
X        pwent->pw_name = strdup (user_newname);
X
X    if (uflg)
X        pwent->pw_uid = user_newid;
X
X    if (gflg)
X        pwent->pw_gid = user_gid;
X
X    if (cflg)
X        pwent->pw_gecos = strdup (user_comment);
X
X    if (dflg)
X        pwent->pw_dir = strdup (user_newhome);
X
X    if (sflg)
X        pwent->pw_shell = strdup (user_shell);
X}
X
X/*
X * new_spent - initialize the values in a shadow password file entry
X *
X *    new_spent() takes all of the values that have been entered and
X *    fills in a (struct spwd) with them.
X */
X
Xvoid
Xnew_spent (spent)
Xstruct    spwd    *spent;
X{
X    if (lflg)
X        spent->sp_namp = strdup (user_newname);
X
X    spent->sp_inact = user_inactive;
X    spent->sp_expire = user_expire;
X}
X
X/*
X * grp_update - add user to secondary group set
X *
X *    grp_update() takes the secondary group set given in user_groups
X *    and adds the user to each group given by that set.
X */
X
Xvoid
Xgrp_update ()
X{
X    int    i;
X    int    is_member;
X    int    was_member;
X    int    was_admin;
X    struct    group    *grp;
X    struct    sgrp    *sgrp;
X
X    /*
X     * Lock and open the group file.  This will load all of the group
X     * entries.
X     */
X
X    if (! gr_lock ()) {
X        fprintf (stderr, "%s: error locking group file\n", Prog);
X        exit (1);
X    }
X    if (! gr_open (O_RDWR)) {
X        fprintf (stderr, "%s: error opening group file\n", Prog);
X        exit (1);
X    }
X#ifdef    SHADOWGRP
X    if (! sgr_lock ()) {
X        fprintf (stderr, "%s: error locking shadow group file\n", Prog);
X        exit (1);
X    }
X    if (! sgr_open (O_RDWR)) {
X        fprintf (stderr, "%s: error opening shadow group file\n", Prog);
X        exit (1);
X    }
X#endif
X
X    /*
X     * Scan through the entire group file looking for the groups that
X     * the user is a member of.
X     */
X
X    for (gr_rewind (), grp = gr_next ();grp;grp = gr_next ()) {
X
X        /*
X         * See if the user specified this group as one of their
X         * concurrent groups.
X         */
X
X        for (i = 0;i < user_ngroups;i++)
X            if (grp->gr_gid == user_groups[i])
X                break;
X
X        is_member = i == user_ngroups ? -1:i;
X
X        for (i = 0;grp->gr_mem[i];i++)
X            if (strcmp (user_name, grp->gr_mem[i]) == 0)
X                break;
X
X        was_member = grp->gr_mem[i] ? i:-1;
X
X        if (is_member == -1 && was_member == -1)
X            continue;
X
X        if (was_member >= 0 && (! Gflg || is_member >= 0)) {
X            if (lflg) {
X                grp->gr_mem = del_list (grp->gr_mem,
X                    user_name);
X                grp->gr_mem = add_list (grp->gr_mem,
X                    user_newname);
X#ifdef    USE_SYSLOG
X                syslog (LOG_INFO,
X                    "change `%s' to `%s' in group `%s'\n",
X                    user_name, user_newname, grp->gr_name);
X#endif
X            }
X        } else if (was_member >= 0 && Gflg && is_member < 0) {
X            grp->gr_mem = del_list (grp->gr_mem, user_name);
X#ifdef    USE_SYSLOG
X            syslog (LOG_INFO, "delete `%s' from group `%s'\n",
X                user_name, grp->gr_name);
X#endif
X        } else if (was_member < 0 && Gflg && is_member >= 0) {
X            grp->gr_mem = add_list (grp->gr_mem,
X                lflg ? user_newname:user_name);
X#ifdef    USE_SYSLOG
X            syslog (LOG_INFO, "add `%s' to group `%s'\n",
X                lflg ? user_newname:user_name, grp->gr_name);
X#endif
X        } else
X            continue;
X
X        if (! gr_update (grp)) {
X            fprintf (stderr, "%s: error adding new group entry\n",
X                Prog);
X            exit (1);
X        }
X#ifdef    NDBM
X        /*
X         * Update the DBM group file with the new entry as well.
X         */
X
X        if (! gr_dbm_update (grp)) {
X            fprintf (stderr, "%s: cannot add new dbm group entry\n",
X                Prog);
X            exit (1);
X        }
X        endgrent ();
X#endif
X    }
X
X#ifdef    SHADOWGRP
X    /*
X     * Scan through the entire shadow group file looking for the groups
X     * that the user is a member of.
X     */
X
X    for (sgr_rewind (), sgrp = sgr_next ();sgrp;sgrp = sgr_next ()) {
X
X        /*
X         * See if the user was a member of this group
X         */
X
X        for (i = 0;sgrp->sg_mem[i];i++)
X            if (strcmp (sgrp->sg_mem[i], user_name) == 0)
X                break;
X
X        was_member = sgrp->sg_mem[i] ? i:-1;
X
X        /*
X         * See if the user was an administrator of this group
X         */
X
X        for (i = 0;sgrp->sg_adm[i];i++)
X            if (strcmp (sgrp->sg_adm[i], user_name) == 0)
X                break;
X
X        was_admin = sgrp->sg_adm[i] ? i:-1;
X
X        /*
X         * See if the user specified this group as one of their
X         * concurrent groups.
X         */
X
X        for (i = 0;i < user_ngroups;i++) {
X            if (! (grp = gr_locate (sgrp->sg_name)))
X                continue;
X
X            if (grp->gr_gid == user_groups[i])
X                break;
X        }
X        is_member = i == user_ngroups ? -1:i;
X
X        if (is_member == -1 && was_admin == -1 && was_member == -1)
X            continue;
X
X        if (was_admin >= 0 && lflg) {
X            sgrp->sg_adm = del_list (sgrp->sg_adm, user_name);
X            sgrp->sg_adm = add_list (sgrp->sg_adm, user_newname);
X#ifdef    USE_SYSLOG
X            syslog (LOG_INFO, "change admin `%s' to `%s' in shadow group `%s'\n",
X                user_name, user_newname, sgrp->sg_name);
X#endif
X        }
X        if (was_member >= 0 && (! Gflg || is_member >= 0)) {
X            if (lflg) {
X                sgrp->sg_mem = del_list (sgrp->sg_mem,
X                    user_name);
X                sgrp->sg_mem = add_list (sgrp->sg_mem,
X                    user_newname);
X#ifdef    USE_SYSLOG
X                syslog (LOG_INFO, "change `%s' to `%s' in shadow group `%s'\n",
X                    user_name, user_newname, sgrp->sg_name);
X#endif
X            }
X        } else if (was_member >= 0 && Gflg && is_member < 0) {
X            sgrp->sg_mem = del_list (sgrp->sg_mem, user_name);
X#ifdef    USE_SYSLOG
X            syslog (LOG_INFO, "delete `%s' from shadow group `%s'\n",
X                user_name, sgrp->sg_name);
X#endif
X        } else if (was_member < 0 && Gflg && is_member >= 0) {
X            sgrp->sg_mem = add_list (sgrp->sg_mem,
X                lflg ? user_newname:user_name);
X#ifdef    USE_SYSLOG
X            syslog (LOG_INFO, "add `%s' to shadow group `%s'\n",
X                lflg ? user_newname:user_name, grp->gr_name);
X#endif
X        } else
X            continue;
X
X        /*
X         * Update the group entry to reflect the changes.
X         */
X
X        if (! sgr_update (sgrp)) {
X            fprintf (stderr, "%s: error adding new group entry\n",
X                Prog);
X            exit (1);
X        }
X#ifdef    NDBM
X        /*
X         * Update the DBM group file with the new entry as well.
X         */
X
X        if (! sgr_dbm_update (sgrp)) {
X            fprintf (stderr, "%s: cannot add new dbm group entry\n",
X                Prog);
X            exit (1);
X        }
X        endsgent ();
X#endif
X    }
X#endif
X}
X
X/*
X * check_new_id - verify the new UID for uniqueness
X *
X *    check_new_id() insures that the new UID does not exist already.
X *    It does this by checking that the UID has changed and that there
X *    is no current entry for this user ID.
X */
X
Xint
Xcheck_new_id ()
X{
X    /*
X     * First, the easy stuff.  If the ID can be duplicated, or if
X     * the ID didn't really change, just return.  If the ID didn't
X     * change, turn off those flags.  No sense doing needless work.
X     */
X
X    if (oflg)
X        return 0;
X
X    if (user_id == user_newid) {
X        uflg = lflg = 0;
X        return 0;
X    }
X    if (getpwuid (user_newid))
X        return -1;
X
X    return 0;
X}
X
X/*
X * process_flags - perform command line argument setting
X *
X *    process_flags() interprets the command line arguments and sets
X *    the values that the user will be created with accordingly.  The
X *    values are checked for sanity.
X */
X
Xvoid
Xprocess_flags (argc, argv)
Xint    argc;
Xchar    **argv;
X{
X    extern    int    optind;
X    extern    char    *optarg;
X    struct    group    *grp;
X    struct    passwd    *pwd;
X    struct    spwd    *spwd;
X    long    l;
X    int    anyflag = 0;
X    int    arg;
X
X    if (argc == 1 || argv[argc - 1][0] == '-')
X        usage ();
X
X    if (! (pwd = getpwnam (argv[argc - 1]))) {
X        fprintf (stderr, "%s: user %s does not exist\n",
X            Prog, argv[argc - 1]);
X        exit (6);
X    }
X    strcpy (user_name, pwd->pw_name);
X    user_id = pwd->pw_uid;
X    user_gid = pwd->pw_gid;
X    strcpy (user_comment, pwd->pw_gecos);
X    strcpy (user_home, pwd->pw_dir);
X    strcpy (user_shell, pwd->pw_shell);
X
X    if (spwd = getspnam (user_name)) {
X        user_expire = spwd->sp_expire;
X        user_inactive = spwd->sp_inact;
X    }
X    while ((arg = getopt (argc, argv, "u:og:G:d:s:c:mf:e:l:")) != EOF) {
X        switch (arg) {
X            case 'c':
X                if (! VALID (optarg)) {
X                    fprintf (stderr,
X                        "%s: invalid field `%s'\n",
X                        Prog, optarg);
X                    exit (3);
X                }
X                if (strcmp (optarg, user_comment)) {
X                    cflg++;
X                    strncpy (user_comment, optarg, BUFSIZ);
X                }
X                break;
X            case 'd':
X                if (! VALID (optarg)) {
X                    fprintf (stderr,
X                        "%s: invalid field `%s'\n",
X                        Prog, optarg);
X                    exit (3);
X                }
X                dflg++;
X                strncpy (user_newhome, optarg, BUFSIZ);
X                break;
X            case 'e':
X                l = strtoday (optarg);
X#ifdef    ITI_AGING
X                l *= DAY;
X#endif
X                if (l != user_expire) {
X                    eflg++;
X                    user_expire = l;
X                }
X                break;
X            case 'f':
X                if (user_inactive != atoi (optarg)) {
X                    fflg++;
X                    user_inactive = atoi (optarg);
X                }
X                break;
X            case 'g':
X                if (isdigit (optarg[0]))
X                    grp = getgrgid (atoi (optarg));
X                else
X                    grp = getgrnam (optarg);
X
X                if (! grp) {
X                    fprintf (stderr,
X                        "%s: unknown group %s\n",
X                        Prog, optarg);
X                    exit (1);
X                }
X                if (grp->gr_gid != user_gid) {
X                    gflg++;
X                    user_gid = grp->gr_gid;
X                }
X                break;
X            case 'G':
X                Gflg++;
X                if (get_groups (optarg))
X                    exit (1);
X
X                break;
X            case 'l':
X                if (! VALID (optarg)) {
X                    fprintf (stderr,
X                        "%s: invalid field `%s'\n",
X                        Prog, optarg);
X                    exit (3);
X                }
X                if (strcmp (user_name, optarg)) {
X                    lflg++;
X                    strcpy (user_newname, optarg);
X                }
X                break;
X            case 'm':
X                if (! dflg)
X                    usage ();
X
X                mflg++;
X                break;
X            case 'o':
X                if (! uflg)
X                    usage ();
X
X                oflg++;
X                break;
X            case 's':
X                if (! VALID (optarg)) {
X                    fprintf (stderr,
X                        "%s: invalid field `%s'\n",
X                        Prog, optarg);
X                    exit (3);
X                }
X                if (strcmp (user_shell, optarg)) {
X                    strncpy (user_shell, optarg, BUFSIZ);
X                    sflg++;
X                }
X                break;
X            case 'u':
X                uflg++;
X                user_newid = atoi (optarg);
X                break;
X            default:
X                usage ();
X        }
X        anyflag++;
X    }
X    if (anyflag == 0) {
X        fprintf (stderr, "%s: no flags given\n", Prog);
X        exit (1);
X    }
X    if (optind != argc - 1)
X        usage ();
X
X    if (dflg && strcmp (user_home, user_newhome) == 0)
X        dflg = mflg = 0;
X
X    if (uflg && user_id == user_newid)
X        uflg = oflg = 0;
X
X    if (lflg && getpwnam (user_newname)) {
X        fprintf (stderr, "%s: user %s exists\n", Prog, user_newname);
X        exit (9);
X    }
X}
X
X/*
X * close_files - close all of the files that were opened
X *
X *    close_files() closes all of the files that were opened for this
X *    new user.  This causes any modified entries to be written out.
X */
X
Xclose_files ()
X{
X    if (! pw_close ()) {
X        fprintf (stderr, "%s: cannot rewrite password file\n", Prog);
X        exit (1);
X    }
X    if (! spw_close ()) {
X        fprintf (stderr, "%s: cannot rewrite shadow password file\n",
X            Prog);
X        exit (1);
X    }
X    if (user_ngroups >= 0) {
X        if (! gr_close ()) {
X            fprintf (stderr, "%s: cannot rewrite group file\n",
X                Prog);
X            exit (1);
X        }
X        (void) gr_unlock ();
X#ifdef    SHADOWGRP
X        if (! sgr_close ()) {
X            fprintf (stderr, "%s: cannot rewrite shadow group file\n",
X                Prog);
X            exit (1);
X        }
X        (void) sgr_unlock ();
X#endif
X    }
X    (void) spw_unlock ();
X    (void) pw_unlock ();
X}
X
X/*
X * open_files - lock and open the password files
X *
X *    open_files() opens the two password files.
X */
X
Xopen_files ()
X{
X    if (! pw_lock ()) {
X        fprintf (stderr, "%s: unable to lock password file\n", Prog);
X        exit (1);
X    }
X    if (! pw_open (O_RDWR)) {
X        fprintf (stderr, "%s: unable to open password file\n", Prog);
X        exit (1);
X    }
X    if (! spw_lock ()) {
X        fprintf (stderr, "%s: cannot lock shadow password file\n", Prog);
X        exit (1);
X    }
X    if (! spw_open (O_RDWR)) {
X        fprintf (stderr, "%s: cannot open shadow password file\n", Prog);
X        exit (1);
X    }
X}
X
X/*
X * usr_update - create the user entries
X *
X *    usr_update() creates the password file entries for this user
X *    and will update the group entries if required.
X */
X
Xusr_update ()
X{
X    struct    passwd    pwent;
X    struct    spwd    spent;
X    struct    passwd    *pwd;
X    struct    spwd    *spwd;
X
X    pwd = pw_locate (user_name);
X    pwent = *pwd;
X
X    spwd = spw_locate (user_name);
X    spent = *spwd;
X
X    new_pwent (&pwent);
X    new_spent (&spent);
X
X    if (lflg || uflg || gflg || cflg || dflg || sflg) {
X        if (! pw_update (&pwent)) {
X            fprintf (stderr, "%s: error changing password entry\n",
X                Prog);
X            exit (1);
X        }
X        if (lflg && ! pw_remove (user_name)) {
X            fprintf (stderr, "%s: error removing password entry\n",
X                Prog);
X            exit (1);
X        }
X#if defined(DBM) || defined(NDBM)
X        if (access ("/etc/passwd.pag", 0) == 0) {
X            if (! pw_dbm_update (&pwent)) {
X                fprintf (stderr, "%s: error adding password dbm entry\n",
X                    Prog);
X                exit (1);
X            }
X            if (lflg && (pwd = getpwnam (user_name)) && ! pw_dbm_remove (pwd)) {
X                fprintf (stderr, "%s: error removing passwd dbm entry\n",
X                    Prog);
X                exit (1);
X            }
X            endpwent ();
X        }
X#endif
X    }
X    if (lflg || eflg || fflg) {
X        if (! spw_update (&spent)) {
X            fprintf (stderr, "%s: error adding new shadow password entry\n",
X                Prog);
X            exit (1);
X        }
X        if (lflg && ! spw_remove (user_name)) {
X            fprintf (stderr, "%s: error removing shadow password entry\n",
X                Prog);
X            exit (1);
X        }
X    }
X#ifdef    NDBM
X    if (access ("/etc/shadow.pag", 0) == 0) {
X        if (! sp_dbm_update (&spent)) {
X            fprintf (stderr, "%s: error updating shadow passwd dbm entry\n",
X                Prog);
X            exit (1);
X        }
X        if (lflg && ! sp_dbm_remove (user_name)) {
X            fprintf (stderr, "%s: error removing shadow passwd db entry\n",
X                Prog);
X            exit (1);
X        }
X        endspent ();
X    }
X#endif
X    if (Gflg || lflg)
X        grp_update ();
X}
X
X/*
X * move_home - move the user's home directory
X *
X *    move_home() creates the user's home directory if it does not
X *    already exist.  It will be created mode 755 owned by the user
X *    with the user's default group.
X */
X
Xmove_home ()
X{
X    struct    stat    sb;
X
X    if (mflg && stat (user_home, &sb) == 0) {
X        if (access (user_newhome, 0) == 0) {
X            fprintf (stderr, "%s: directory %s exists\n",
X                Prog, user_newhome);
X            exit (12);
X        } else if (rename (user_home, user_newhome)) {
X            if (errno == EXDEV) {
X                if (mkdir (user_newhome, sb.st_mode & 0777)) {
X                    fprintf (stderr,
X                        "%s: can't create %s\n",
X                        Prog, user_newhome);
X                }
X                chown (user_newhome, sb.st_uid, sb.st_gid);
X                if (copy_tree (user_home, user_newhome,
X                        -1, -1) == 0 &&
X                    remove_tree (user_home) == 0 &&
X                        rmdir (user_home) == 0)
X                    return;
X
X                remove_tree (user_newhome);
X                rmdir (user_newhome);
X            }
X            fprintf (stderr,
X                "%s: cannot rename directory %s to %s\n",
X                Prog, user_home, user_newhome);
X            exit (12);
X        }
X    }
X    if (uflg || gflg)
X        chown (dflg ? user_newhome:user_home, user_id, user_gid);
X}
X
X/*
X * main - useradd command
X */
X
Xmain (argc, argv)
Xint    argc;
Xchar    **argv;
X{
X    /*
X     * Get my name so that I can use it to report errors.
X     */
X
X    if (Prog = strrchr (argv[0], '/'))
X        Prog++;
X    else
X        Prog = argv[0];
X
X#ifdef    USE_SYSLOG
X    openlog (Prog, LOG_PID|LOG_CONS|LOG_NOWAIT, LOG_AUTH);
X#endif
X
X    /*
X     * The open routines for the DBM files don't use read-write
X     * as the mode, so we have to clue them in.
X     */
X
X#if defined(DBM) || defined(NDBM)
X    pw_dbm_mode = O_RDWR;
X#endif
X#ifdef    NDBM
X    sp_dbm_mode = O_RDWR;
X    gr_dbm_mode = O_RDWR;
X#ifdef    SHADOWGRP
X    sg_dbm_mode = O_RDWR;
X#endif
X#endif
X    process_flags (argc, argv);
X
X    /*
X     * Do the hard stuff - open the files, change the user entries,
X     * change the home directory, then close and update the files.
X     */
X
X    open_files ();
X
X    usr_update ();
X
X    close_files ();
X
X    if (mflg)
X        move_home ();
X
X    exit (0);
X    /*NOTREACHED*/
X}
END_OF_FILE
  if test 24732 -ne `wc -c <'usermod.c'`; then
    echo shar: \"'usermod.c'\" unpacked with wrong size!
  fi
  # end of 'usermod.c'
fi
echo shar: End of archive 2 \(of 11\).
cp /dev/null ark2isdone
MISSING=""
for I in 1 2 3 4 5 6 7 8 9 10 11 ; do
    if test ! -f ark${I}isdone ; then
    MISSING="${MISSING} ${I}"
    fi
done
if test "${MISSING}" = "" ; then
    echo You have unpacked all 11 archives.
    rm -f ark[1-9]isdone ark[1-9][0-9]isdone
else
    echo You still must unpack the following archives:
    echo "        " ${MISSING}
fi
exit 0
exit 0 # Just in case...