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Annotation of src/usr.bin/chpass/pw_copy.c, Revision 1.1

1.1     ! deraadt     1: /*     $NetBSD: pw_copy.c,v 1.3 1995/03/26 04:55:30 glass Exp $        */
        !             2:
        !             3: /*-
        !             4:  * Copyright (c) 1990, 1993, 1994
        !             5:  *     The Regents of the University of California.  All rights reserved.
        !             6:  *
        !             7:  * Redistribution and use in source and binary forms, with or without
        !             8:  * modification, are permitted provided that the following conditions
        !             9:  * are met:
        !            10:  * 1. Redistributions of source code must retain the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer.
        !            12:  * 2. Redistributions in binary form must reproduce the above copyright
        !            13:  *    notice, this list of conditions and the following disclaimer in the
        !            14:  *    documentation and/or other materials provided with the distribution.
        !            15:  * 3. All advertising materials mentioning features or use of this software
        !            16:  *    must display the following acknowledgement:
        !            17:  *     This product includes software developed by the University of
        !            18:  *     California, Berkeley and its contributors.
        !            19:  * 4. Neither the name of the University nor the names of its contributors
        !            20:  *    may be used to endorse or promote products derived from this software
        !            21:  *    without specific prior written permission.
        !            22:  *
        !            23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            33:  * SUCH DAMAGE.
        !            34:  */
        !            35:
        !            36: #ifndef lint
        !            37: #if 0
        !            38: static char sccsid[] = "@(#)pw_copy.c  8.4 (Berkeley) 4/2/94";
        !            39: #else
        !            40: static char rcsid[] = "$NetBSD: pw_copy.c,v 1.3 1995/03/26 04:55:30 glass Exp $";
        !            41: #endif
        !            42: #endif /* not lint */
        !            43:
        !            44: /*
        !            45:  * This module is used to copy the master password file, replacing a single
        !            46:  * record, by chpass(1) and passwd(1).
        !            47:  */
        !            48:
        !            49: #include <err.h>
        !            50: #include <pwd.h>
        !            51: #include <stdio.h>
        !            52: #include <string.h>
        !            53:
        !            54: #include <pw_util.h>
        !            55: #include "pw_copy.h"
        !            56:
        !            57: extern char *tempname;
        !            58:
        !            59: void
        !            60: pw_copy(ffd, tfd, pw)
        !            61:        int ffd, tfd;
        !            62:        struct passwd *pw;
        !            63: {
        !            64:        FILE *from, *to;
        !            65:        int done;
        !            66:        char *p, buf[8192];
        !            67:
        !            68:        if (!(from = fdopen(ffd, "r")))
        !            69:                pw_error(_PATH_MASTERPASSWD, 1, 1);
        !            70:        if (!(to = fdopen(tfd, "w")))
        !            71:                pw_error(tempname, 1, 1);
        !            72:
        !            73:        for (done = 0; fgets(buf, sizeof(buf), from);) {
        !            74:                if (!strchr(buf, '\n')) {
        !            75:                        warnx("%s: line too long", _PATH_MASTERPASSWD);
        !            76:                        pw_error(NULL, 0, 1);
        !            77:                }
        !            78:                if (done) {
        !            79:                        (void)fprintf(to, "%s", buf);
        !            80:                        if (ferror(to))
        !            81:                                goto err;
        !            82:                        continue;
        !            83:                }
        !            84:                if (!(p = strchr(buf, ':'))) {
        !            85:                        warnx("%s: corrupted entry", _PATH_MASTERPASSWD);
        !            86:                        pw_error(NULL, 0, 1);
        !            87:                }
        !            88:                *p = '\0';
        !            89:                if (strcmp(buf, pw->pw_name)) {
        !            90:                        *p = ':';
        !            91:                        (void)fprintf(to, "%s", buf);
        !            92:                        if (ferror(to))
        !            93:                                goto err;
        !            94:                        continue;
        !            95:                }
        !            96:                (void)fprintf(to, "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n",
        !            97:                    pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid,
        !            98:                    pw->pw_class, pw->pw_change, pw->pw_expire, pw->pw_gecos,
        !            99:                    pw->pw_dir, pw->pw_shell);
        !           100:                done = 1;
        !           101:                if (ferror(to))
        !           102:                        goto err;
        !           103:        }
        !           104:        if (!done)
        !           105:                (void)fprintf(to, "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n",
        !           106:                    pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid,
        !           107:                    pw->pw_class, pw->pw_change, pw->pw_expire, pw->pw_gecos,
        !           108:                    pw->pw_dir, pw->pw_shell);
        !           109:
        !           110:        if (ferror(to))
        !           111: err:           pw_error(NULL, 1, 1);
        !           112:        (void)fclose(to);
        !           113: }