/* $NetBSD: edit.c,v 1.22 2015/10/27 14:47:45 shm Exp $ */ /*- * Copyright (c) 1990, 1993, 1994 * The Regents of the University of California. 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 the University 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 THE REGENTS 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 THE REGENTS 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. */ #include #ifndef lint #if 0 static char sccsid[] = "@(#)edit.c 8.3 (Berkeley) 4/2/94"; #else __RCSID("$NetBSD: edit.c,v 1.22 2015/10/27 14:47:45 shm Exp $"); #endif #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "chpass.h" void edit(char *tempname, struct passwd *pw) { struct stat begin, end; for (;;) { if (stat(tempname, &begin)) (*Pw_error)(tempname, 1, 1); pw_edit(1, tempname); 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(tempname, pw)) break; #ifdef YP if (use_yp) yppw_prompt(); else #endif 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(char *tempname, int fd, struct passwd *pw) { FILE *fp; char *bp, *p; char chgstr[256], expstr[256]; if (!(fp = fdopen(fd, "w"))) (*Pw_error)(tempname, 1, 1); (void)fprintf(fp, "#Changing user %sdatabase information for %s.\n", use_yp ? "YP " : "", 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(chgstr, sizeof chgstr, pw->pw_change)); (void)fprintf(fp, "Expire [month day year]: %s\n", ttoa(expstr, sizeof expstr, 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 = strdup(pw->pw_gecos); if (!bp) { err(1, "strdup"); /*NOTREACHED*/ } 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); free(bp); } int verify(char *tempname, struct passwd *pw) { ENTRY *ep; char *p; struct stat sb; FILE *fp = NULL; int len, fd; static char buf[LINE_MAX]; if ((fd = open(tempname, O_RDONLY|O_NOFOLLOW)) == -1 || (fp = fdopen(fd, "r")) == NULL) (*Pw_error)(tempname, 1, 1); if (fstat(fd, &sb)) (*Pw_error)(tempname, 1, 1); if (sb.st_size == 0 || sb.st_nlink != 1) { 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((unsigned char)*++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, "malloc"); (void)snprintf(p, len, "%s,%s,%s,%s", list[E_NAME].save, list[E_LOCATE].save, list[E_BPHONE].save, list[E_HPHONE].save); pw->pw_gecos = p; if (snprintf(buf, sizeof(buf), "%s:%s:%d:%d:%s:%lu:%lu:%s:%s:%s", pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class, (u_long)pw->pw_change, (u_long)pw->pw_expire, pw->pw_gecos, pw->pw_dir, pw->pw_shell) >= (int)sizeof(buf)) { warnx("entries too long"); return (0); } return (pw_scan(buf, pw, NULL)); }