chpass.tproj/util.c

   1 /*
   2  * Copyright (c) 1999-2016 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*-
  24  * Copyright (c) 1990, 1993, 1994
  25  *      The Regents of the University of California.  All rights reserved.
  26  * Copyright (c) 2002 Networks Associates Technology, Inc.
  27  * All rights reserved.
  28  *
  29  * Portions of this software were developed for the FreeBSD Project by
  30  * ThinkSec AS and NAI Labs, the Security Research Division of Network
  31  * Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
  32  * ("CBOSS"), as part of the DARPA CHATS research program.
  33  *
  34  * Redistribution and use in source and binary forms, with or without
  35  * modification, are permitted provided that the following conditions
  36  * are met:
  37  * 1. Redistributions of source code must retain the above copyright
  38  *    notice, this list of conditions and the following disclaimer.
  39  * 2. Redistributions in binary form must reproduce the above copyright
  40  *    notice, this list of conditions and the following disclaimer in the
  41  *    documentation and/or other materials provided with the distribution.
  42  * 3. All advertising materials mentioning features or use of this software
  43  *    must display the following acknowledgement:
  44  *      This product includes software developed by the University of
  45  *      California, Berkeley and its contributors.
  46  * 4. Neither the name of the University nor the names of its contributors
  47  *    may be used to endorse or promote products derived from this software
  48  *    without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  60  * SUCH DAMAGE.
  61  */
  62
  63 #if 0
  64 #ifndef lint
  65 #if 0
  66 static char sccsid[] = "@(#)util.c      8.4 (Berkeley) 4/2/94";
  67 #endif
  68 #endif /* not lint */
  69 #include <sys/cdefs.h>
  70 __FBSDID("$FreeBSD: src/usr.bin/chpass/util.c,v 1.13 2004/01/18 21:46:39 charnier Exp $");
  71 #endif
  72
  73 #include <sys/types.h>
  74
  75 #include <ctype.h>
  76 #include <stdio.h>
  77 #include <stdlib.h>
  78 #include <string.h>
  79 #include <time.h>
  80 #include <tzfile.h>
  81 #include <unistd.h>
  82
  83 #include "chpass.h"
  84
  85 #if OPEN_DIRECTORY
  86 #include <err.h>
  87 #include <paths.h>
  88 #include <sys/stat.h>
  89 #include "open_directory.h"
  90
  91 char* tempname;
  92 #endif /* OPEN_DIRECTORY */
  93
  94 static const char *months[] =
  95         { "January", "February", "March", "April", "May", "June",
  96           "July", "August", "September", "October", "November",
  97           "December", NULL };
  98
  99 char *
 100 ttoa(time_t tval)
 101 {
 102         struct tm *tp;
 103         static char tbuf[50];
 104
 105         if (tval) {
 106                 tp = localtime(&tval);
 107                 (void)sprintf(tbuf, "%s %d, %d", months[tp->tm_mon],
 108                     tp->tm_mday, tp->tm_year + TM_YEAR_BASE);
 109         }
 110         else
 111                 *tbuf = '\0';
 112         return (tbuf);
 113 }
 114
 115 int
 116 atot(char *p, time_t *store)
 117 {
 118         static struct tm *lt;
 119         char *t;
 120         const char **mp;
 121         time_t tval;
 122         int day, month, year;
 123
 124         if (!*p) {
 125                 *store = 0;
 126                 return (0);
 127         }
 128         if (!lt) {
 129                 unsetenv("TZ");
 130                 (void)time(&tval);
 131                 lt = localtime(&tval);
 132         }
 133         if (!(t = strtok(p, " \t")))
 134                 goto bad;
 135         if (isdigit(*t)) {
 136                 month = atoi(t);
 137         } else {
 138                 for (mp = months;; ++mp) {
 139                         if (!*mp)
 140                                 goto bad;
 141                         if (!strncasecmp(*mp, t, 3)) {
 142                                 month = (int)(mp - months + 1);
 143                                 break;
 144                         }
 145                 }
 146         }
 147         if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t))
 148                 goto bad;
 149         day = atoi(t);
 150         if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t))
 151                 goto bad;
 152         year = atoi(t);
 153         if (day < 1 || day > 31 || month < 1 || month > 12)
 154                 goto bad;
 155         /* Allow two digit years 1969-2068 */
 156         if (year < 69)
 157                 year += 2000;
 158         else if (year < 100)
 159                 year += TM_YEAR_BASE;
 160         if (year < EPOCH_YEAR)
 161 bad:            return (1);
 162         lt->tm_year = year - TM_YEAR_BASE;
 163         lt->tm_mon = month - 1;
 164         lt->tm_mday = day;
 165         lt->tm_hour = 0;
 166         lt->tm_min = 0;
 167         lt->tm_sec = 0;
 168         lt->tm_isdst = -1;
 169         if ((tval = mktime(lt)) < 0)
 170                 return (1);
 171         *store = tval;
 172         return (0);
 173 }
 174
 175 int
 176 ok_shell(char *name)
 177 {
 178 #ifdef __APPLE__
 179         char *sh;
 180 #else
 181         char *p, *sh;
 182 #endif
 183
 184         setusershell();
 185         while ((sh = getusershell())) {
 186                 if (!strcmp(name, sh)) {
 187                         endusershell();
 188                         return (1);
 189                 }
 190 #ifndef __APPLE__
 191                 /* allow just shell name, but use "real" path */
 192                 if ((p = strrchr(sh, '/')) && strcmp(name, p + 1) == 0) {
 193                         endusershell();
 194                         return (1);
 195                 }
 196 #endif
 197         }
 198         endusershell();
 199         return (0);
 200 }
 201
 202 char *
 203 dup_shell(char *name)
 204 {
 205         char *p, *sh, *ret;
 206
 207         setusershell();
 208         while ((sh = getusershell())) {
 209                 if (!strcmp(name, sh)) {
 210                         endusershell();
 211                         return (strdup(name));
 212                 }
 213                 /* allow just shell name, but use "real" path */
 214                 if ((p = strrchr(sh, '/')) && strcmp(name, p + 1) == 0) {
 215                         ret = strdup(sh);
 216                         endusershell();
 217                         return (ret);
 218                 }
 219         }
 220         endusershell();
 221         return (NULL);
 222 }
 223
 224 #if OPEN_DIRECTORY
 225 int
 226 cfprintf(FILE* file, const char* format, ...)
 227 {
 228         char* cstr;
 229         int result = 0;
 230         va_list args;
 231         va_start(args, format);
 232         CFStringRef formatStr = CFStringCreateWithCStringNoCopy(NULL, format, kCFStringEncodingUTF8, kCFAllocatorNull);
 233         if (formatStr) {
 234                 CFStringRef str = CFStringCreateWithFormatAndArguments(NULL, NULL, formatStr, args);
 235                 if (str) {
 236                         size_t size = CFStringGetMaximumSizeForEncoding(CFStringGetLength(str), kCFStringEncodingUTF8) + 1;
 237                         va_end(args);
 238                         cstr = malloc(size);
 239                         if (cstr && CFStringGetCString(str, cstr, size, kCFStringEncodingUTF8)) {
 240                                 result = fprintf(file, "%s", cstr);
 241                                 free(cstr);
 242                         }
 243                         CFRelease(str);
 244                 }
 245                 CFRelease(formatStr);
 246         }
 247         return result;
 248 }
 249
 250 /*
 251  * Edit the temp file.  Return -1 on error, >0 if the file was modified, 0
 252  * if it was not.
 253  */
 254 int
 255 editfile(const char* tfn)
 256 {
 257         struct sigaction sa, sa_int, sa_quit;
 258         sigset_t oldsigset, sigset;
 259         struct stat st1, st2;
 260         const char *p, *editor;
 261         int pstat;
 262         pid_t editpid;
 263
 264         if ((editor = getenv("EDITOR")) == NULL)
 265                 editor = _PATH_VI;
 266         if ((p = strrchr(editor, '/')))
 267                 ++p;
 268         else
 269                 p = editor;
 270
 271         if (stat(tfn, &st1) == -1)
 272                 return (-1);
 273         sa.sa_handler = SIG_IGN;
 274         sigemptyset(&sa.sa_mask);
 275         sa.sa_flags = 0;
 276         sigaction(SIGINT, &sa, &sa_int);
 277         sigaction(SIGQUIT, &sa, &sa_quit);
 278         sigemptyset(&sigset);
 279         sigaddset(&sigset, SIGCHLD);
 280         sigprocmask(SIG_BLOCK, &sigset, &oldsigset);
 281         switch ((editpid = fork())) {
 282         case -1:
 283                 return (-1);
 284         case 0:
 285                 sigaction(SIGINT, &sa_int, NULL);
 286                 sigaction(SIGQUIT, &sa_quit, NULL);
 287                 sigprocmask(SIG_SETMASK, &oldsigset, NULL);
 288                 errno = 0;
 289                 if (!master_mode) {
 290                         (void)setgid(getgid());
 291                         (void)setuid(getuid());
 292                 }
 293                 execlp(editor, p, tfn, (char *)NULL);
 294                 _exit(errno);
 295         default:
 296                 /* parent */
 297                 break;
 298         }
 299         for (;;) {
 300                 if (waitpid(editpid, &pstat, WUNTRACED) == -1) {
 301                         if (errno == EINTR)
 302                                 continue;
 303                         unlink(tfn);
 304                         editpid = -1;
 305                         break;
 306                 } else if (WIFSTOPPED(pstat)) {
 307                         raise(WSTOPSIG(pstat));
 308                 } else if (WIFEXITED(pstat) && WEXITSTATUS(pstat) == 0) {
 309                         editpid = -1;
 310                         break;
 311                 } else {
 312                         unlink(tfn);
 313                         editpid = -1;
 314                         break;
 315                 }
 316         }
 317         sigaction(SIGINT, &sa_int, NULL);
 318         sigaction(SIGQUIT, &sa_quit, NULL);
 319         sigprocmask(SIG_SETMASK, &oldsigset, NULL);
 320         if (stat(tfn, &st2) == -1)
 321                 return (-1);
 322         return (st1.st_mtime != st2.st_mtime);
 323 }
 324
 325 #if 0
 326 static void
 327 pw_error(char *name, int err, int eval)
 328 {
 329         if (err)
 330                 warn("%s", name);
 331         exit(eval);
 332 }
 333 #endif
 334
 335 #endif /* OPEN_DIRECTORY */