1 /*- 2 * Copyright (c) 1989, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef lint 31 static const char copyright[] = 32 "@(#) Copyright (c) 1989, 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34 #endif 35 36 #if 0 37 #ifndef lint 38 static char sccsid[] = "@(#)calendar.c 8.3 (Berkeley) 3/25/94"; 39 #endif 40 #endif 41 42 #include <sys/cdefs.h> 43 __FBSDID("$FreeBSD$"); 44 45 #include <sys/param.h> 46 #include <sys/stat.h> 47 #include <sys/wait.h> 48 #include <ctype.h> 49 #include <err.h> 50 #include <errno.h> 51 #include <langinfo.h> 52 #include <locale.h> 53 #include <pwd.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <unistd.h> 58 59 #include "pathnames.h" 60 #include "calendar.h" 61 62 const char *calendarFile = "calendar"; /* default calendar file */ 63 static const char *calendarHomes[] = {".calendar", _PATH_INCLUDE}; /* HOME */ 64 static const char *calendarNoMail = "nomail";/* don't sent mail if file exist */ 65 66 static char path[MAXPATHLEN]; 67 68 struct fixs neaster, npaskha, ncny, nfullmoon, nnewmoon; 69 struct fixs nmarequinox, nsepequinox, njunsolstice, ndecsolstice; 70 71 #define REPLACE(string, slen, struct_) \ 72 if (strncasecmp(buf, (string), (slen)) == 0 && buf[(slen)]) { \ 73 if (struct_.name != NULL) \ 74 free(struct_.name); \ 75 if ((struct_.name = strdup(buf + (slen))) == NULL) \ 76 errx(1, "cannot allocate memory"); \ 77 struct_.len = strlen(buf + (slen)); \ 78 continue; \ 79 } 80 void 81 cal(void) 82 { 83 char *pp, p; 84 FILE *fpin; 85 FILE *fpout; 86 int l; 87 int count, i; 88 int month[MAXCOUNT]; 89 int day[MAXCOUNT]; 90 int year[MAXCOUNT]; 91 char **extradata; /* strings of 20 length */ 92 int flags; 93 static int d_first = -1; 94 char buf[2048 + 1]; 95 struct event *events[MAXCOUNT]; 96 struct tm tm; 97 char dbuf[80]; 98 99 initcpp(); 100 extradata = (char **)calloc(MAXCOUNT, sizeof(char *)); 101 for (i = 0; i < MAXCOUNT; i++) { 102 extradata[i] = (char *)calloc(1, 20); 103 } 104 105 /* Unused */ 106 tm.tm_sec = 0; 107 tm.tm_min = 0; 108 tm.tm_hour = 0; 109 tm.tm_wday = 0; 110 111 count = 0; 112 if ((fpin = opencalin()) == NULL) { 113 free(extradata); 114 return; 115 } 116 if ((fpout = opencalout()) == NULL) { 117 fclose(fpin); 118 free(extradata); 119 return; 120 } 121 while ((fpin = fincludegets(buf, sizeof(buf), fpin)) != NULL) { 122 if (*buf == '\0') 123 continue; 124 for (l = strlen(buf); 125 l > 0 && isspace((unsigned char)buf[l - 1]); 126 l--) 127 ; 128 buf[l] = '\0'; 129 if (buf[0] == '\0') 130 continue; 131 132 /* Parse special definitions: LANG, Easter, Paskha etc */ 133 if (strncmp(buf, "LANG=", 5) == 0) { 134 (void)setlocale(LC_ALL, buf + 5); 135 d_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 136 setnnames(); 137 continue; 138 } 139 REPLACE("Easter=", 7, neaster); 140 REPLACE("Paskha=", 7, npaskha); 141 REPLACE("ChineseNewYear=", 15, ncny); 142 REPLACE("NewMoon=", 8, nnewmoon); 143 REPLACE("FullMoon=", 9, nfullmoon); 144 REPLACE("MarEquinox=", 11, nmarequinox); 145 REPLACE("SepEquinox=", 11, nsepequinox); 146 REPLACE("JunSolstice=", 12, njunsolstice); 147 REPLACE("DecSolstice=", 12, ndecsolstice); 148 if (strncmp(buf, "SEQUENCE=", 9) == 0) { 149 setnsequences(buf + 9); 150 continue; 151 } 152 153 /* 154 * If the line starts with a tab, the data has to be 155 * added to the previous line 156 */ 157 if (buf[0] == '\t') { 158 for (i = 0; i < count; i++) 159 event_continue(events[i], buf); 160 continue; 161 } 162 163 /* Get rid of leading spaces (non-standard) */ 164 while (isspace((unsigned char)buf[0])) 165 memcpy(buf, buf + 1, strlen(buf)); 166 167 /* No tab in the line, then not a valid line */ 168 if ((pp = strchr(buf, '\t')) == NULL) 169 continue; 170 171 /* Trim spaces in front of the tab */ 172 while (isspace((unsigned char)pp[-1])) 173 pp--; 174 175 p = *pp; 176 *pp = '\0'; 177 if ((count = parsedaymonth(buf, year, month, day, &flags, 178 extradata)) == 0) 179 continue; 180 *pp = p; 181 if (count < 0) { 182 /* Show error status based on return value */ 183 if (debug) 184 fprintf(stderr, "Ignored: %s\n", buf); 185 if (count == -1) 186 continue; 187 count = -count + 1; 188 } 189 190 /* Find the last tab */ 191 while (pp[1] == '\t') 192 pp++; 193 194 if (d_first < 0) 195 d_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 196 197 for (i = 0; i < count; i++) { 198 tm.tm_mon = month[i] - 1; 199 tm.tm_mday = day[i]; 200 tm.tm_year = year[i] - 1900; 201 (void)strftime(dbuf, sizeof(dbuf), 202 d_first ? "%e %b" : "%b %e", &tm); 203 if (debug) 204 fprintf(stderr, "got %s\n", pp); 205 events[i] = event_add(year[i], month[i], day[i], dbuf, 206 ((flags &= F_VARIABLE) != 0) ? 1 : 0, pp, 207 extradata[i]); 208 } 209 } 210 211 event_print_all(fpout); 212 closecal(fpout); 213 free(extradata); 214 } 215 216 FILE * 217 opencalin(void) 218 { 219 size_t i; 220 int found; 221 struct stat sbuf; 222 FILE *fpin; 223 224 /* open up calendar file */ 225 if ((fpin = fopen(calendarFile, "r")) == NULL) { 226 if (doall) { 227 if (chdir(calendarHomes[0]) != 0) 228 return (NULL); 229 if (stat(calendarNoMail, &sbuf) == 0) 230 return (NULL); 231 if ((fpin = fopen(calendarFile, "r")) == NULL) 232 return (NULL); 233 } else { 234 char *home = getenv("HOME"); 235 if (home == NULL || *home == '\0') 236 errx(1, "cannot get home directory"); 237 if (chdir(home) != 0) 238 errx(1, "cannot enter home directory"); 239 for (found = i = 0; i < sizeof(calendarHomes) / 240 sizeof(calendarHomes[0]); i++) 241 if (chdir(calendarHomes[i]) == 0 && 242 (fpin = fopen(calendarFile, "r")) != NULL) { 243 found = 1; 244 break; 245 } 246 if (!found) 247 errx(1, 248 "can't open calendar file \"%s\": %s (%d)", 249 calendarFile, strerror(errno), errno); 250 } 251 } 252 return (fpin); 253 } 254 255 FILE * 256 opencalout(void) 257 { 258 int fd; 259 260 /* not reading all calendar files, just set output to stdout */ 261 if (!doall) 262 return (stdout); 263 264 /* set output to a temporary file, so if no output don't send mail */ 265 snprintf(path, sizeof(path), "%s/_calXXXXXX", _PATH_TMP); 266 if ((fd = mkstemp(path)) < 0) 267 return (NULL); 268 return (fdopen(fd, "w+")); 269 } 270 271 void 272 closecal(FILE *fp) 273 { 274 uid_t uid; 275 struct stat sbuf; 276 int nread, pdes[2], status; 277 char buf[1024]; 278 279 if (!doall) 280 return; 281 282 rewind(fp); 283 if (fstat(fileno(fp), &sbuf) || !sbuf.st_size) 284 goto done; 285 if (pipe(pdes) < 0) 286 goto done; 287 switch (fork()) { 288 case -1: /* error */ 289 (void)close(pdes[0]); 290 (void)close(pdes[1]); 291 goto done; 292 case 0: 293 /* child -- set stdin to pipe output */ 294 if (pdes[0] != STDIN_FILENO) { 295 (void)dup2(pdes[0], STDIN_FILENO); 296 (void)close(pdes[0]); 297 } 298 (void)close(pdes[1]); 299 uid = geteuid(); 300 if (setuid(getuid()) < 0) { 301 warnx("setuid failed"); 302 _exit(1); 303 }; 304 if (setgid(getegid()) < 0) { 305 warnx("setgid failed"); 306 _exit(1); 307 } 308 if (setuid(uid) < 0) { 309 warnx("setuid failed"); 310 _exit(1); 311 } 312 execl(_PATH_SENDMAIL, "sendmail", "-i", "-t", "-F", 313 "\"Reminder Service\"", (char *)NULL); 314 warn(_PATH_SENDMAIL); 315 _exit(1); 316 } 317 /* parent -- write to pipe input */ 318 (void)close(pdes[0]); 319 320 write(pdes[1], "From: \"Reminder Service\" <", 26); 321 write(pdes[1], pw->pw_name, strlen(pw->pw_name)); 322 write(pdes[1], ">\nTo: <", 7); 323 write(pdes[1], pw->pw_name, strlen(pw->pw_name)); 324 write(pdes[1], ">\nSubject: ", 11); 325 write(pdes[1], dayname, strlen(dayname)); 326 write(pdes[1], "'s Calendar\nPrecedence: bulk\n\n", 30); 327 328 while ((nread = read(fileno(fp), buf, sizeof(buf))) > 0) 329 (void)write(pdes[1], buf, nread); 330 (void)close(pdes[1]); 331 done: (void)fclose(fp); 332 (void)unlink(path); 333 while (wait(&status) >= 0); 334 } 335