prettyness police

[unix-history] / usr / src / usr.bin / chpass / edit.c

/*-
* Copyright (c) 1990, 1993
*      The Regents of the University of California.  All rights reserved.
*
* %sccs.include.redist.c%
*/

#ifndef lint
static char sccsid[] = "@(#)edit.c      8.2 (Berkeley) %G%";
#endif /* not lint */

#include <sys/param.h>
#include <sys/stat.h>

#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <paths.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <pw_scan.h>
#include <pw_util.h>

#include "chpass.h"

extern char *tempname;

void
edit(pw)
       struct passwd *pw;
{
       struct stat begin, end;

       for (;;) {
               if (stat(tempname, &begin))
                       pw_error(tempname, 1, 1);
               pw_edit(1);
               if (stat(tempname, &end))
                       pw_error(tempname, 1, 1);
               if (begin.st_mtime == end.st_mtime) {
                       warnx("no changes made");
                       pw_error(NULL, 0, 0);
               }
               if (verify(pw))
                       break;
               pw_prompt();
       }
}

/*
* display --
*      print out the file for the user to edit; strange side-effect:
*      set conditional flag if the user gets to edit the shell.
*/
void
display(fd, pw)
       int fd;
       struct passwd *pw;
{
       FILE *fp;
       char *bp, *p, *ttoa();

       if (!(fp = fdopen(fd, "w")))
               pw_error(tempname, 1, 1);

       (void)fprintf(fp,
           "#Changing user database information for %s.\n", pw->pw_name);
       if (!uid) {
               (void)fprintf(fp, "Login: %s\n", pw->pw_name);
               (void)fprintf(fp, "Password: %s\n", pw->pw_passwd);
               (void)fprintf(fp, "Uid [#]: %d\n", pw->pw_uid);
               (void)fprintf(fp, "Gid [# or name]: %d\n", pw->pw_gid);
               (void)fprintf(fp, "Change [month day year]: %s\n",
                   ttoa(pw->pw_change));
               (void)fprintf(fp, "Expire [month day year]: %s\n",
                   ttoa(pw->pw_expire));
               (void)fprintf(fp, "Class: %s\n", pw->pw_class);
               (void)fprintf(fp, "Home directory: %s\n", pw->pw_dir);
               (void)fprintf(fp, "Shell: %s\n",
                   *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
       }
       /* Only admin can change "restricted" shells. */
       else if (ok_shell(pw->pw_shell))
               /*
                * Make shell a restricted field.  Ugly with a
                * necklace, but there's not much else to do.
                */
               (void)fprintf(fp, "Shell: %s\n",
                   *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
       else
               list[E_SHELL].restricted = 1;
       bp = pw->pw_gecos;
       p = strsep(&bp, ",");
       (void)fprintf(fp, "Full Name: %s\n", p ? p : "");
       p = strsep(&bp, ",");
       (void)fprintf(fp, "Location: %s\n", p ? p : "");
       p = strsep(&bp, ",");
       (void)fprintf(fp, "Office Phone: %s\n", p ? p : "");
       p = strsep(&bp, ",");
       (void)fprintf(fp, "Home Phone: %s\n", p ? p : "");

       (void)fchown(fd, getuid(), getgid());
       (void)fclose(fp);
}

int
verify(pw)
       struct passwd *pw;
{
       ENTRY *ep;
       char *p;
       struct stat sb;
       FILE *fp;
       int len;
       char buf[LINE_MAX];

       if (!(fp = fopen(tempname, "r")))
               pw_error(tempname, 1, 1);
       if (fstat(fileno(fp), &sb))
               pw_error(tempname, 1, 1);
       if (sb.st_size == 0) {
               warnx("corrupted temporary file");
               goto bad;
       }
       while (fgets(buf, sizeof(buf), fp)) {
               if (!buf[0] || buf[0] == '#')
                       continue;
               if (!(p = strchr(buf, '\n'))) {
                       warnx("line too long");
                       goto bad;
               }
               *p = '\0';
               for (ep = list;; ++ep) {
                       if (!ep->prompt) {
                               warnx("unrecognized field");
                               goto bad;
                       }
                       if (!strncasecmp(buf, ep->prompt, ep->len)) {
                               if (ep->restricted && uid) {
                                       warnx(
                                           "you may not change the %s field",
                                               ep->prompt);
                                       goto bad;
                               }
                               if (!(p = strchr(buf, ':'))) {
                                       warnx("line corrupted");
                                       goto bad;
                               }
                               while (isspace(*++p));
                               if (ep->except && strpbrk(p, ep->except)) {
                                       warnx(
                                  "illegal character in the \"%s\" field",
                                           ep->prompt);
                                       goto bad;
                               }
                               if ((ep->func)(p, pw, ep)) {
bad:                                    (void)fclose(fp);
                                       return (0);
                               }
                               break;
                       }
               }
       }
       (void)fclose(fp);

       /* Build the gecos field. */
       len = strlen(list[E_NAME].save) + strlen(list[E_BPHONE].save) +
           strlen(list[E_HPHONE].save) + strlen(list[E_LOCATE].save) + 4;
       if (!(p = malloc(len)))
               err(1, NULL);
       (void)sprintf(pw->pw_gecos = p, "%s,%s,%s,%s", list[E_NAME].save,
           list[E_LOCATE].save, list[E_BPHONE].save, list[E_HPHONE].save);

       if (snprintf(buf, sizeof(buf),
           "%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s",
           pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class,
           pw->pw_change, pw->pw_expire, pw->pw_gecos, pw->pw_dir,
           pw->pw_shell) >= sizeof(buf)) {
               warnx("entries too long");
               return (0);
       }
       return (pw_scan(buf, pw));
}