crontab.c revision 184706
12311Sjkh/* Copyright 1988,1990,1993,1994 by Paul Vixie 22311Sjkh * All rights reserved 32311Sjkh * 42311Sjkh * Distribute freely, except: don't remove my name from the source or 52311Sjkh * documentation (don't take credit for my work), mark your changes (don't 62311Sjkh * get me blamed for your possible bugs), don't alter or remove this 72311Sjkh * notice. May be sold if buildable source is provided to buyer. No 82311Sjkh * warrantee of any kind, express or implied, is included with this 92311Sjkh * software; use at your own risk, responsibility for damages (if any) to 102311Sjkh * anyone resulting from the use of this software rests entirely with the 112311Sjkh * user. 122311Sjkh * 132311Sjkh * Send bug reports, bug fixes, enhancements, requests, flames, etc., and 142311Sjkh * I'll try to keep a version up to date. I can be reached as follows: 152311Sjkh * Paul Vixie <paul@vix.com> uunet!decwrl!vixie!paul 165176Sache * From Id: crontab.c,v 2.13 1994/01/17 03:20:37 vixie Exp 172311Sjkh */ 182311Sjkh 192311Sjkh#if !defined(lint) && !defined(LINT) 2029452Scharnierstatic const char rcsid[] = 2150479Speter "$FreeBSD: head/usr.sbin/cron/crontab/crontab.c 184706 2008-11-06 04:53:02Z matteo $"; 222311Sjkh#endif 232311Sjkh 242311Sjkh/* crontab - install and manage per-user crontab files 252311Sjkh * vix 02may87 [RCS has the rest of the log] 262311Sjkh * vix 26jan87 [original] 272311Sjkh */ 282311Sjkh 292311Sjkh#define MAIN_PROGRAM 302311Sjkh 312311Sjkh#include "cron.h" 322311Sjkh#include <errno.h> 332311Sjkh#include <fcntl.h> 34135242Sdds#include <md5.h> 3569793Sobrien#include <paths.h> 362311Sjkh#include <sys/file.h> 372311Sjkh#include <sys/stat.h> 382311Sjkh#ifdef USE_UTIMES 392311Sjkh# include <sys/time.h> 402311Sjkh#else 412311Sjkh# include <time.h> 422311Sjkh# include <utime.h> 432311Sjkh#endif 442311Sjkh#if defined(POSIX) 452311Sjkh# include <locale.h> 462311Sjkh#endif 472311Sjkh 48135242Sdds#define MD5_SIZE 33 492311Sjkh#define NHEADER_LINES 3 502311Sjkh 512311Sjkh 522311Sjkhenum opt_t { opt_unknown, opt_list, opt_delete, opt_edit, opt_replace }; 532311Sjkh 542311Sjkh#if DEBUGGING 552311Sjkhstatic char *Options[] = { "???", "list", "delete", "edit", "replace" }; 562311Sjkh#endif 572311Sjkh 582311Sjkh 592311Sjkhstatic PID_T Pid; 602311Sjkhstatic char User[MAX_UNAME], RealUser[MAX_UNAME]; 612311Sjkhstatic char Filename[MAX_FNAME]; 622311Sjkhstatic FILE *NewCrontab; 632311Sjkhstatic int CheckErrorCount; 642311Sjkhstatic enum opt_t Option; 652311Sjkhstatic struct passwd *pw; 66173412Skevlostatic void list_cmd(void), 67173412Skevlo delete_cmd(void), 68173412Skevlo edit_cmd(void), 69173412Skevlo poke_daemon(void), 70173412Skevlo check_error(char *), 71173412Skevlo parse_args(int c, char *v[]); 72173412Skevlostatic int replace_cmd(void); 732311Sjkh 742311Sjkh 752311Sjkhstatic void 762311Sjkhusage(msg) 772311Sjkh char *msg; 782311Sjkh{ 7929452Scharnier fprintf(stderr, "crontab: usage error: %s\n", msg); 8029452Scharnier fprintf(stderr, "%s\n%s\n", 8129452Scharnier "usage: crontab [-u user] file", 8229452Scharnier " crontab [-u user] { -e | -l | -r }"); 832311Sjkh exit(ERROR_EXIT); 842311Sjkh} 852311Sjkh 862311Sjkh 872311Sjkhint 882311Sjkhmain(argc, argv) 892311Sjkh int argc; 902311Sjkh char *argv[]; 912311Sjkh{ 922311Sjkh int exitstatus; 932311Sjkh 942311Sjkh Pid = getpid(); 952311Sjkh ProgramName = argv[0]; 962311Sjkh 972311Sjkh#if defined(POSIX) 982311Sjkh setlocale(LC_ALL, ""); 992311Sjkh#endif 1002311Sjkh 1012311Sjkh#if defined(BSD) 1022311Sjkh setlinebuf(stderr); 1032311Sjkh#endif 1042311Sjkh parse_args(argc, argv); /* sets many globals, opens a file */ 1052311Sjkh set_cron_uid(); 1062311Sjkh set_cron_cwd(); 1072311Sjkh if (!allowed(User)) { 10829452Scharnier warnx("you (%s) are not allowed to use this program", User); 1092311Sjkh log_it(RealUser, Pid, "AUTH", "crontab command not allowed"); 1102311Sjkh exit(ERROR_EXIT); 1112311Sjkh } 1122311Sjkh exitstatus = OK_EXIT; 1132311Sjkh switch (Option) { 1142311Sjkh case opt_list: list_cmd(); 1152311Sjkh break; 1162311Sjkh case opt_delete: delete_cmd(); 1172311Sjkh break; 1182311Sjkh case opt_edit: edit_cmd(); 1192311Sjkh break; 1202311Sjkh case opt_replace: if (replace_cmd() < 0) 1212311Sjkh exitstatus = ERROR_EXIT; 1222311Sjkh break; 12329452Scharnier case opt_unknown: 12429452Scharnier break; 1252311Sjkh } 126104326Sdd exit(exitstatus); 1272311Sjkh /*NOTREACHED*/ 1282311Sjkh} 1292311Sjkh 1308857Srgrimes 1312311Sjkhstatic void 1322311Sjkhparse_args(argc, argv) 1332311Sjkh int argc; 1342311Sjkh char *argv[]; 1352311Sjkh{ 1362311Sjkh int argch; 137154166Sbrooks char resolved_path[PATH_MAX]; 1382311Sjkh 13929452Scharnier if (!(pw = getpwuid(getuid()))) 14029452Scharnier errx(ERROR_EXIT, "your UID isn't in the passwd file, bailing out"); 141184706Smatteo bzero(pw->pw_passwd, strlen(pw->pw_passwd)); 14220573Spst (void) strncpy(User, pw->pw_name, (sizeof User)-1); 14320573Spst User[(sizeof User)-1] = '\0'; 1442311Sjkh strcpy(RealUser, User); 1452311Sjkh Filename[0] = '\0'; 1462311Sjkh Option = opt_unknown; 14724428Simp while ((argch = getopt(argc, argv, "u:lerx:")) != -1) { 1482311Sjkh switch (argch) { 1492311Sjkh case 'x': 1502311Sjkh if (!set_debug_flags(optarg)) 1512311Sjkh usage("bad debug option"); 1522311Sjkh break; 1532311Sjkh case 'u': 1542311Sjkh if (getuid() != ROOT_UID) 15529452Scharnier errx(ERROR_EXIT, "must be privileged to use -u"); 1562311Sjkh if (!(pw = getpwnam(optarg))) 15729452Scharnier errx(ERROR_EXIT, "user `%s' unknown", optarg); 158184706Smatteo bzero(pw->pw_passwd, strlen(pw->pw_passwd)); 15920573Spst (void) strncpy(User, pw->pw_name, (sizeof User)-1); 16020573Spst User[(sizeof User)-1] = '\0'; 1612311Sjkh break; 1622311Sjkh case 'l': 1632311Sjkh if (Option != opt_unknown) 1642311Sjkh usage("only one operation permitted"); 1652311Sjkh Option = opt_list; 1662311Sjkh break; 1672311Sjkh case 'r': 1682311Sjkh if (Option != opt_unknown) 1692311Sjkh usage("only one operation permitted"); 1702311Sjkh Option = opt_delete; 1712311Sjkh break; 1722311Sjkh case 'e': 1732311Sjkh if (Option != opt_unknown) 1742311Sjkh usage("only one operation permitted"); 1752311Sjkh Option = opt_edit; 1762311Sjkh break; 1772311Sjkh default: 1782311Sjkh usage("unrecognized option"); 1792311Sjkh } 1802311Sjkh } 1812311Sjkh 1822311Sjkh endpwent(); 1832311Sjkh 1842311Sjkh if (Option != opt_unknown) { 1852311Sjkh if (argv[optind] != NULL) { 1862311Sjkh usage("no arguments permitted after this option"); 1872311Sjkh } 1882311Sjkh } else { 1892311Sjkh if (argv[optind] != NULL) { 1902311Sjkh Option = opt_replace; 19120573Spst (void) strncpy (Filename, argv[optind], (sizeof Filename)-1); 19220573Spst Filename[(sizeof Filename)-1] = '\0'; 19320573Spst 1942311Sjkh } else { 1952311Sjkh usage("file name must be specified for replace"); 1962311Sjkh } 1972311Sjkh } 1982311Sjkh 1992311Sjkh if (Option == opt_replace) { 2002311Sjkh /* we have to open the file here because we're going to 2012311Sjkh * chdir(2) into /var/cron before we get around to 2022311Sjkh * reading the file. 2032311Sjkh */ 2042311Sjkh if (!strcmp(Filename, "-")) { 2052311Sjkh NewCrontab = stdin; 206154166Sbrooks } else if (realpath(Filename, resolved_path) != NULL && 207161964Sru !strcmp(resolved_path, SYSCRONTAB)) { 208161964Sru err(ERROR_EXIT, SYSCRONTAB " must be edited manually"); 2092311Sjkh } else { 2102311Sjkh /* relinquish the setuid status of the binary during 2112311Sjkh * the open, lest nonroot users read files they should 2122311Sjkh * not be able to read. we can't use access() here 2132311Sjkh * since there's a race condition. thanks go out to 2142311Sjkh * Arnt Gulbrandsen <agulbra@pvv.unit.no> for spotting 2152311Sjkh * the race. 2162311Sjkh */ 2172311Sjkh 21829452Scharnier if (swap_uids() < OK) 21929452Scharnier err(ERROR_EXIT, "swapping uids"); 22029452Scharnier if (!(NewCrontab = fopen(Filename, "r"))) 22129452Scharnier err(ERROR_EXIT, "%s", Filename); 22229452Scharnier if (swap_uids() < OK) 22329452Scharnier err(ERROR_EXIT, "swapping uids back"); 2242311Sjkh } 2252311Sjkh } 2262311Sjkh 2272311Sjkh Debug(DMISC, ("user=%s, file=%s, option=%s\n", 2282311Sjkh User, Filename, Options[(int)Option])) 2292311Sjkh} 2302311Sjkh 231135174Sddsstatic void 232135174Sddscopy_file(FILE *in, FILE *out) { 233135174Sdds int x, ch; 2342311Sjkh 235135174Sdds Set_LineNum(1) 236135174Sdds /* ignore the top few comments since we probably put them there. 237135174Sdds */ 238135174Sdds for (x = 0; x < NHEADER_LINES; x++) { 239135174Sdds ch = get_char(in); 240135174Sdds if (EOF == ch) 241135174Sdds break; 242135174Sdds if ('#' != ch) { 243135174Sdds putc(ch, out); 244135174Sdds break; 245135174Sdds } 246135174Sdds while (EOF != (ch = get_char(in))) 247135174Sdds if (ch == '\n') 248135174Sdds break; 249135174Sdds if (EOF == ch) 250135174Sdds break; 251135174Sdds } 252135174Sdds 253135174Sdds /* copy the rest of the crontab (if any) to the output file. 254135174Sdds */ 255135174Sdds if (EOF != ch) 256135174Sdds while (EOF != (ch = get_char(in))) 257135174Sdds putc(ch, out); 258135174Sdds} 259135174Sdds 2602311Sjkhstatic void 2612311Sjkhlist_cmd() { 2622311Sjkh char n[MAX_FNAME]; 2632311Sjkh FILE *f; 2642311Sjkh 2652311Sjkh log_it(RealUser, Pid, "LIST", User); 2662311Sjkh (void) sprintf(n, CRON_TAB(User)); 2672311Sjkh if (!(f = fopen(n, "r"))) { 2682311Sjkh if (errno == ENOENT) 26929452Scharnier errx(ERROR_EXIT, "no crontab for %s", User); 2702311Sjkh else 27129452Scharnier err(ERROR_EXIT, "%s", n); 2722311Sjkh } 2732311Sjkh 2742311Sjkh /* file is open. copy to stdout, close. 2752311Sjkh */ 276135174Sdds copy_file(f, stdout); 2772311Sjkh fclose(f); 2782311Sjkh} 2792311Sjkh 2802311Sjkh 2812311Sjkhstatic void 2822311Sjkhdelete_cmd() { 2832311Sjkh char n[MAX_FNAME]; 28467127Spaul int ch, first; 2852311Sjkh 28667127Spaul if (isatty(STDIN_FILENO)) { 28767127Spaul (void)fprintf(stderr, "remove crontab for %s? ", User); 28867127Spaul first = ch = getchar(); 28967127Spaul while (ch != '\n' && ch != EOF) 29067127Spaul ch = getchar(); 29167127Spaul if (first != 'y' && first != 'Y') 29267127Spaul return; 29367127Spaul } 29467127Spaul 2952311Sjkh log_it(RealUser, Pid, "DELETE", User); 2962311Sjkh (void) sprintf(n, CRON_TAB(User)); 2972311Sjkh if (unlink(n)) { 2982311Sjkh if (errno == ENOENT) 29929452Scharnier errx(ERROR_EXIT, "no crontab for %s", User); 3002311Sjkh else 30129452Scharnier err(ERROR_EXIT, "%s", n); 3022311Sjkh } 3032311Sjkh poke_daemon(); 3042311Sjkh} 3052311Sjkh 3062311Sjkh 3072311Sjkhstatic void 3082311Sjkhcheck_error(msg) 3092311Sjkh char *msg; 3102311Sjkh{ 3112311Sjkh CheckErrorCount++; 3122311Sjkh fprintf(stderr, "\"%s\":%d: %s\n", Filename, LineNumber-1, msg); 3132311Sjkh} 3142311Sjkh 3152311Sjkh 3162311Sjkhstatic void 3172311Sjkhedit_cmd() { 3182311Sjkh char n[MAX_FNAME], q[MAX_TEMPSTR], *editor; 3192311Sjkh FILE *f; 320135174Sdds int t; 32168388Sdwmalone struct stat statbuf, fsbuf; 3222311Sjkh WAIT_T waiter; 3232311Sjkh PID_T pid, xpid; 32420573Spst mode_t um; 325135165Sdds int syntax_error = 0; 326135242Sdds char orig_md5[MD5_SIZE]; 327135242Sdds char new_md5[MD5_SIZE]; 3282311Sjkh 3292311Sjkh log_it(RealUser, Pid, "BEGIN EDIT", User); 3302311Sjkh (void) sprintf(n, CRON_TAB(User)); 3312311Sjkh if (!(f = fopen(n, "r"))) { 33229452Scharnier if (errno != ENOENT) 33329452Scharnier err(ERROR_EXIT, "%s", n); 33429452Scharnier warnx("no crontab for %s - using an empty one", User); 33569793Sobrien if (!(f = fopen(_PATH_DEVNULL, "r"))) 33669793Sobrien err(ERROR_EXIT, _PATH_DEVNULL); 3372311Sjkh } 3382311Sjkh 33920573Spst um = umask(077); 34020573Spst (void) sprintf(Filename, "/tmp/crontab.XXXXXXXXXX"); 34120573Spst if ((t = mkstemp(Filename)) == -1) { 34229452Scharnier warn("%s", Filename); 34320573Spst (void) umask(um); 3442311Sjkh goto fatal; 3452311Sjkh } 34620573Spst (void) umask(um); 3472311Sjkh#ifdef HAS_FCHOWN 3482311Sjkh if (fchown(t, getuid(), getgid()) < 0) { 3492311Sjkh#else 3502311Sjkh if (chown(Filename, getuid(), getgid()) < 0) { 3512311Sjkh#endif 35229452Scharnier warn("fchown"); 3532311Sjkh goto fatal; 3542311Sjkh } 35568388Sdwmalone if (!(NewCrontab = fdopen(t, "r+"))) { 35629452Scharnier warn("fdopen"); 3572311Sjkh goto fatal; 3582311Sjkh } 3592311Sjkh 360135174Sdds copy_file(f, NewCrontab); 3612311Sjkh fclose(f); 36268388Sdwmalone if (fflush(NewCrontab)) 36329452Scharnier err(ERROR_EXIT, "%s", Filename); 36468388Sdwmalone if (fstat(t, &fsbuf) < 0) { 36568388Sdwmalone warn("unable to fstat temp file"); 36668388Sdwmalone goto fatal; 36768388Sdwmalone } 3682311Sjkh again: 3695176Sache if (stat(Filename, &statbuf) < 0) { 37029452Scharnier warn("stat"); 3712311Sjkh fatal: unlink(Filename); 3722311Sjkh exit(ERROR_EXIT); 3732311Sjkh } 37468388Sdwmalone if (statbuf.st_dev != fsbuf.st_dev || statbuf.st_ino != fsbuf.st_ino) 37568388Sdwmalone errx(ERROR_EXIT, "temp file must be edited in place"); 376135242Sdds if (MD5File(Filename, orig_md5) == NULL) { 377135242Sdds warn("MD5"); 378135242Sdds goto fatal; 379135242Sdds } 3802311Sjkh 3812311Sjkh if ((!(editor = getenv("VISUAL"))) 3822311Sjkh && (!(editor = getenv("EDITOR"))) 3832311Sjkh ) { 3842311Sjkh editor = EDITOR; 3852311Sjkh } 3862311Sjkh 3872311Sjkh /* we still have the file open. editors will generally rewrite the 3882311Sjkh * original file rather than renaming/unlinking it and starting a 3892311Sjkh * new one; even backup files are supposed to be made by copying 3902311Sjkh * rather than by renaming. if some editor does not support this, 3912311Sjkh * then don't use it. the security problems are more severe if we 3922311Sjkh * close and reopen the file around the edit. 3932311Sjkh */ 3942311Sjkh 3952311Sjkh switch (pid = fork()) { 3962311Sjkh case -1: 39729452Scharnier warn("fork"); 3982311Sjkh goto fatal; 3992311Sjkh case 0: 4002311Sjkh /* child */ 40129452Scharnier if (setuid(getuid()) < 0) 40229452Scharnier err(ERROR_EXIT, "setuid(getuid())"); 40329452Scharnier if (chdir("/tmp") < 0) 40429452Scharnier err(ERROR_EXIT, "chdir(/tmp)"); 40529452Scharnier if (strlen(editor) + strlen(Filename) + 2 >= MAX_TEMPSTR) 40629452Scharnier errx(ERROR_EXIT, "editor or filename too long"); 40779452Sbrian execlp(editor, editor, Filename, (char *)NULL); 40829452Scharnier err(ERROR_EXIT, "%s", editor); 4092311Sjkh /*NOTREACHED*/ 4102311Sjkh default: 4112311Sjkh /* parent */ 4122311Sjkh break; 4132311Sjkh } 4142311Sjkh 4152311Sjkh /* parent */ 41615161Sscrappy { 41715161Sscrappy void (*f[4])(); 41815161Sscrappy f[0] = signal(SIGHUP, SIG_IGN); 41915161Sscrappy f[1] = signal(SIGINT, SIG_IGN); 42015161Sscrappy f[2] = signal(SIGTERM, SIG_IGN); 4212311Sjkh xpid = wait(&waiter); 42215161Sscrappy signal(SIGHUP, f[0]); 42315161Sscrappy signal(SIGINT, f[1]); 42415161Sscrappy signal(SIGTERM, f[2]); 42515161Sscrappy } 4262311Sjkh if (xpid != pid) { 42729452Scharnier warnx("wrong PID (%d != %d) from \"%s\"", xpid, pid, editor); 4282311Sjkh goto fatal; 4292311Sjkh } 4302311Sjkh if (WIFEXITED(waiter) && WEXITSTATUS(waiter)) { 43129452Scharnier warnx("\"%s\" exited with status %d", editor, WEXITSTATUS(waiter)); 4322311Sjkh goto fatal; 4332311Sjkh } 4342311Sjkh if (WIFSIGNALED(waiter)) { 43529452Scharnier warnx("\"%s\" killed; signal %d (%score dumped)", 43629452Scharnier editor, WTERMSIG(waiter), WCOREDUMP(waiter) ?"" :"no "); 4372311Sjkh goto fatal; 4382311Sjkh } 4395176Sache if (stat(Filename, &statbuf) < 0) { 44029452Scharnier warn("stat"); 4412311Sjkh goto fatal; 4422311Sjkh } 44368388Sdwmalone if (statbuf.st_dev != fsbuf.st_dev || statbuf.st_ino != fsbuf.st_ino) 44468388Sdwmalone errx(ERROR_EXIT, "temp file must be edited in place"); 445135242Sdds if (MD5File(Filename, new_md5) == NULL) { 446135242Sdds warn("MD5"); 447135242Sdds goto fatal; 448135242Sdds } 449135242Sdds if (strcmp(orig_md5, new_md5) == 0 && !syntax_error) { 45029452Scharnier warnx("no changes made to crontab"); 4512311Sjkh goto remove; 4522311Sjkh } 45329452Scharnier warnx("installing new crontab"); 4542311Sjkh switch (replace_cmd()) { 455135165Sdds case 0: /* Success */ 4562311Sjkh break; 457135165Sdds case -1: /* Syntax error */ 4582311Sjkh for (;;) { 4592311Sjkh printf("Do you want to retry the same edit? "); 4602311Sjkh fflush(stdout); 4612311Sjkh q[0] = '\0'; 4622311Sjkh (void) fgets(q, sizeof q, stdin); 4632311Sjkh switch (islower(q[0]) ? q[0] : tolower(q[0])) { 4642311Sjkh case 'y': 465135165Sdds syntax_error = 1; 4662311Sjkh goto again; 4672311Sjkh case 'n': 4682311Sjkh goto abandon; 4692311Sjkh default: 4702311Sjkh fprintf(stderr, "Enter Y or N\n"); 4712311Sjkh } 4722311Sjkh } 4732311Sjkh /*NOTREACHED*/ 474135165Sdds case -2: /* Install error */ 4752311Sjkh abandon: 47629452Scharnier warnx("edits left in %s", Filename); 4772311Sjkh goto done; 4782311Sjkh default: 47929452Scharnier warnx("panic: bad switch() in replace_cmd()"); 4802311Sjkh goto fatal; 4812311Sjkh } 4822311Sjkh remove: 4832311Sjkh unlink(Filename); 4842311Sjkh done: 4852311Sjkh log_it(RealUser, Pid, "END EDIT", User); 4862311Sjkh} 4872311Sjkh 4888857Srgrimes 4892311Sjkh/* returns 0 on success 4902311Sjkh * -1 on syntax error 4912311Sjkh * -2 on install error 4922311Sjkh */ 4932311Sjkhstatic int 4942311Sjkhreplace_cmd() { 4952311Sjkh char n[MAX_FNAME], envstr[MAX_ENVSTR], tn[MAX_FNAME]; 4962311Sjkh FILE *tmp; 4972311Sjkh int ch, eof; 4982311Sjkh entry *e; 4992311Sjkh time_t now = time(NULL); 5002311Sjkh char **envp = env_init(); 5012311Sjkh 50220573Spst if (envp == NULL) { 50329452Scharnier warnx("cannot allocate memory"); 50420573Spst return (-2); 50520573Spst } 50620573Spst 5072311Sjkh (void) sprintf(n, "tmp.%d", Pid); 5082311Sjkh (void) sprintf(tn, CRON_TAB(n)); 5092311Sjkh if (!(tmp = fopen(tn, "w+"))) { 51029452Scharnier warn("%s", tn); 5112311Sjkh return (-2); 5122311Sjkh } 5132311Sjkh 5142311Sjkh /* write a signature at the top of the file. 5152311Sjkh * 5162311Sjkh * VERY IMPORTANT: make sure NHEADER_LINES agrees with this code. 5172311Sjkh */ 5182311Sjkh fprintf(tmp, "# DO NOT EDIT THIS FILE - edit the master and reinstall.\n"); 5192311Sjkh fprintf(tmp, "# (%s installed on %-24.24s)\n", Filename, ctime(&now)); 5202311Sjkh fprintf(tmp, "# (Cron version -- %s)\n", rcsid); 5212311Sjkh 5222311Sjkh /* copy the crontab to the tmp 5232311Sjkh */ 52468388Sdwmalone rewind(NewCrontab); 5252311Sjkh Set_LineNum(1) 5262311Sjkh while (EOF != (ch = get_char(NewCrontab))) 5272311Sjkh putc(ch, tmp); 5282311Sjkh ftruncate(fileno(tmp), ftell(tmp)); 5292311Sjkh fflush(tmp); rewind(tmp); 5302311Sjkh 5312311Sjkh if (ferror(tmp)) { 53229452Scharnier warnx("error while writing new crontab to %s", tn); 5332311Sjkh fclose(tmp); unlink(tn); 5342311Sjkh return (-2); 5352311Sjkh } 5362311Sjkh 5372311Sjkh /* check the syntax of the file being installed. 5382311Sjkh */ 5392311Sjkh 5402311Sjkh /* BUG: was reporting errors after the EOF if there were any errors 5412311Sjkh * in the file proper -- kludged it by stopping after first error. 5422311Sjkh * vix 31mar87 5432311Sjkh */ 5442311Sjkh Set_LineNum(1 - NHEADER_LINES) 5452311Sjkh CheckErrorCount = 0; eof = FALSE; 5462311Sjkh while (!CheckErrorCount && !eof) { 5472311Sjkh switch (load_env(envstr, tmp)) { 5482311Sjkh case ERR: 5492311Sjkh eof = TRUE; 5502311Sjkh break; 5512311Sjkh case FALSE: 5522311Sjkh e = load_entry(tmp, check_error, pw, envp); 5532311Sjkh if (e) 5542311Sjkh free(e); 5552311Sjkh break; 5562311Sjkh case TRUE: 5572311Sjkh break; 5582311Sjkh } 5592311Sjkh } 5602311Sjkh 5612311Sjkh if (CheckErrorCount != 0) { 56229452Scharnier warnx("errors in crontab file, can't install"); 5632311Sjkh fclose(tmp); unlink(tn); 5642311Sjkh return (-1); 5652311Sjkh } 5662311Sjkh 5672311Sjkh#ifdef HAS_FCHOWN 5682311Sjkh if (fchown(fileno(tmp), ROOT_UID, -1) < OK) 5692311Sjkh#else 5702311Sjkh if (chown(tn, ROOT_UID, -1) < OK) 5712311Sjkh#endif 5722311Sjkh { 57329452Scharnier warn("chown"); 5742311Sjkh fclose(tmp); unlink(tn); 5752311Sjkh return (-2); 5762311Sjkh } 5772311Sjkh 5782311Sjkh#ifdef HAS_FCHMOD 5792311Sjkh if (fchmod(fileno(tmp), 0600) < OK) 5802311Sjkh#else 5812311Sjkh if (chmod(tn, 0600) < OK) 5822311Sjkh#endif 5832311Sjkh { 58429452Scharnier warn("chown"); 5852311Sjkh fclose(tmp); unlink(tn); 5862311Sjkh return (-2); 5872311Sjkh } 5882311Sjkh 5892311Sjkh if (fclose(tmp) == EOF) { 59029452Scharnier warn("fclose"); 5912311Sjkh unlink(tn); 5922311Sjkh return (-2); 5932311Sjkh } 5942311Sjkh 5952311Sjkh (void) sprintf(n, CRON_TAB(User)); 5962311Sjkh if (rename(tn, n)) { 59729452Scharnier warn("error renaming %s to %s", tn, n); 5982311Sjkh unlink(tn); 5992311Sjkh return (-2); 6002311Sjkh } 6012311Sjkh log_it(RealUser, Pid, "REPLACE", User); 6022311Sjkh 6032311Sjkh poke_daemon(); 6042311Sjkh 6052311Sjkh return (0); 6062311Sjkh} 6072311Sjkh 6082311Sjkh 6092311Sjkhstatic void 6102311Sjkhpoke_daemon() { 6112311Sjkh#ifdef USE_UTIMES 6122311Sjkh struct timeval tvs[2]; 6132311Sjkh struct timezone tz; 6142311Sjkh 6152311Sjkh (void) gettimeofday(&tvs[0], &tz); 6162311Sjkh tvs[1] = tvs[0]; 6172311Sjkh if (utimes(SPOOL_DIR, tvs) < OK) { 61829452Scharnier warn("can't update mtime on spooldir %s", SPOOL_DIR); 6192311Sjkh return; 6202311Sjkh } 6212311Sjkh#else 6222311Sjkh if (utime(SPOOL_DIR, NULL) < OK) { 62329452Scharnier warn("can't update mtime on spooldir %s", SPOOL_DIR); 6242311Sjkh return; 6252311Sjkh } 6262311Sjkh#endif /*USE_UTIMES*/ 6272311Sjkh} 628