Sprite 1984 - 1993/Sprite 1984 - 1993.iso/src/cmds/chpass/field.c

C/C++ Source or Header | 1990-07-12 | 4.8 KB | 245 lines

/*
 * Copyright (c) 1988 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)field.c    5.8 (Berkeley) 3/16/89";
#endif /* not lint */

#include <sys/param.h>
#include <pwd.h>
#include <grp.h>
#include <strings.h>
#include <stdio.h>
#include <ctype.h>
#include <chpass.h>
#include "pathnames.h"

/* ARGSUSED */
p_login(p, pw, ep)
    char *p;
    struct passwd *pw;
    struct entry *ep;
{
    if (!*p) {
        (void)fprintf(stderr, "chpass: empty login field.\n");
        return(1);
    }
    if (*p == '-') {
        (void)fprintf(stderr,
            "chpass: login names may not begin with a hyphen.\n");
        return(1);
    }
    if (!(pw->pw_name = strdup(p))) {
        (void)fprintf(stderr, "chpass: can't save entry.\n");
        return(1);
    }
    if (index(p, '.'))
        (void)fprintf(stderr,
            "chpass: \'.\' is dangerous in a login name.\n");
    for (; *p; ++p)
        if (isupper(*p)) {
            (void)fprintf(stderr,
                "chpass: upper-case letters are dangerous in a login name.\n");
            break;
        }
    return(0);
}

/* ARGSUSED */
p_passwd(p, pw, ep)
    char *p;
    struct passwd *pw;
    struct entry *ep;
{
    if (!*p)
        pw->pw_passwd = "";    /* "NOLOGIN"; */
    else if (!(pw->pw_passwd = strdup(p))) {
        (void)fprintf(stderr, "chpass: can't save password entry.\n");
        return(1);
    }

    return(0);
}

/* ARGSUSED */
p_uid(p, pw, ep)
    register char *p;
    struct passwd *pw;
    struct entry *ep;
{
    int id;

    if (!*p) {
        (void)fprintf(stderr, "chpass: empty uid field.\n");
        return(1);
    }
    if (!isdigit(*p)) {
        (void)fprintf(stderr, "chpass: illegal uid.\n");
        return(1);
    }
    id = atoi(p);
    if ((u_int)id > USHRT_MAX) {
        (void)fprintf(stderr, "chpass: %d > max uid value (%d).\n",
            id, USHRT_MAX);
        return(1);
    }
    pw->pw_uid = id;
    return(0);
}

/* ARGSUSED */
p_gid(p, pw, ep)
    register char *p;
    struct passwd *pw;
    struct entry *ep;
{
    struct group *gr;
    int id;

    if (!*p) {
        (void)fprintf(stderr, "chpass: empty gid field.\n");
        return(1);
    }
    if (!isdigit(*p)) {
        if (!(gr = getgrnam(p))) {
            (void)fprintf(stderr,
                "chpass: unknown group %s.\n", p);
            return(1);
        }
        pw->pw_gid = gr->gr_gid;
        return(0);
    }
    id = atoi(p);
    if ((u_int)id > USHRT_MAX) {
        (void)fprintf(stderr, "chpass: %d > max gid value (%d).\n",
            id, USHRT_MAX);
        return(1);
    }
    pw->pw_gid = id;
    return(0);
}

/* ARGSUSED */
p_class(p, pw, ep)
    char *p;
    struct passwd *pw;
    struct entry *ep;
{
    if (!*p)
        pw->pw_class = "";
    else if (!(pw->pw_class = strdup(p))) {
        (void)fprintf(stderr, "chpass: can't save entry.\n");
        return(1);
    }

    return(0);
}

/* ARGSUSED */
p_change(p, pw, ep)
    char *p;
    struct passwd *pw;
    struct entry *ep;
{
    if (!atot(p, &pw->pw_change))
        return(0);
    (void)fprintf(stderr, "chpass: illegal date for change field.\n");
    return(1);
}

/* ARGSUSED */
p_expire(p, pw, ep)
    char *p;
    struct passwd *pw;
    struct entry *ep;
{
    if (!atot(p, &pw->pw_expire))
        return(0);
    (void)fprintf(stderr, "chpass: illegal date for expire field.\n");
    return(1);
}

/* ARGSUSED */
p_gecos(p, pw, ep)
    char *p;
    struct passwd *pw;
    struct entry *ep;
{
    if (!*p)
        ep->save = "";
    else if (!(ep->save = strdup(p))) {
        (void)fprintf(stderr, "chpass: can't save entry.\n");
        return(1);
    }
    return(0);
}

/* ARGSUSED */
p_hdir(p, pw, ep)
    char *p;
    struct passwd *pw;
    struct entry *ep;
{
    if (!*p) {
        (void)fprintf(stderr, "chpass: empty home directory field.\n");
        return(1);
    }
    if (!(pw->pw_dir = strdup(p))) {
        (void)fprintf(stderr, "chpass: can't save entry.\n");
        return(1);
    }
    return(0);
}

/* ARGSUSED */
p_shell(p, pw, ep)
    register char *p;
    struct passwd *pw;
    struct entry *ep;
{
    register char *sh, *t;
    char *getusershell();

    if (!*p) {
        pw->pw_shell = _PATH_BSHELL;
        return(0);
    }
    setusershell();
    for (;;) {
        if (!(sh = getusershell())) {
            /* only admin can set "restricted" shells */
            if (!uid)
                break;
            (void)fprintf(stderr,
                "chpass: %s: non-standard shell.\n", p);
            return(1);
        }
        if (!strcmp(p, sh))
            break;
        /* allow just shell name */
        if ((t = rindex(sh, '/')) && !strcmp(p, t)) {
            p = t;
            break;
        }
    }
    if (!(pw->pw_shell = strdup(p))) {
        (void)fprintf(stderr, "chpass: can't save entry.\n");
        return(1);
    }
    return(0);
}