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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)calendar.c 8.3 (Berkeley) 3/25/94 35 * $FreeBSD: src/usr.bin/calendar/io.c,v 1.13.2.3 2002/08/26 00:32:46 jmallett Exp $ 36 * $DragonFly: src/usr.bin/calendar/io.c,v 1.4 2004/01/06 15:29:09 eirikn Exp $ 37 */ 38 39 #include <sys/types.h> 40 #include <sys/param.h> 41 #include <sys/stat.h> 42 #include <sys/time.h> 43 #include <sys/uio.h> 44 #include <sys/wait.h> 45 #include <ctype.h> 46 #include <err.h> 47 #include <errno.h> 48 #include <langinfo.h> 49 #include <locale.h> 50 #include <pwd.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <unistd.h> 55 56 #include "pathnames.h" 57 #include "calendar.h" 58 59 60 const char *calendarFile = "calendar.all"; /* default calendar file */ 61 const char *calendarHomes[] = { ".calendar", _PATH_INCLUDE }; /* HOME */ 62 const char *calendarNoMail = "nomail"; /* don't sent mail if this file exist */ 63 64 struct fixs neaster, npaskha; 65 66 struct iovec header[] = { 67 {"From: ", 6}, 68 {NULL, 0}, 69 {" (Reminder Service)\nTo: ", 24}, 70 {NULL, 0}, 71 {"\nSubject: ", 10}, 72 {NULL, 0}, 73 {"'s Calendar\nPrecedence: bulk\n\n", 30}, 74 }; 75 76 77 void 78 cal(void) 79 { 80 int printing; 81 char *p; 82 FILE *fp; 83 int ch, l; 84 int month; 85 int day; 86 int var; 87 static int d_first = -1; 88 char buf[2048 + 1]; 89 90 if ((fp = opencal()) == NULL) 91 return; 92 for (printing = 0; fgets(buf, sizeof(buf), stdin) != NULL;) { 93 if ((p = strchr(buf, '\n')) != NULL) 94 *p = '\0'; 95 else 96 while ((ch = getchar()) != '\n' && ch != EOF); 97 for (l = strlen(buf); 98 l > 0 && isspace((unsigned char)buf[l - 1]); 99 l--) 100 ; 101 buf[l] = '\0'; 102 if (buf[0] == '\0') 103 continue; 104 if (strncmp(buf, "LANG=", 5) == 0) { 105 (void) setlocale(LC_ALL, buf + 5); 106 d_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 107 setnnames(); 108 continue; 109 } 110 if (strncasecmp(buf, "Easter=", 7) == 0 && buf[7]) { 111 if (neaster.name != NULL) 112 free(neaster.name); 113 if ((neaster.name = strdup(buf + 7)) == NULL) 114 errx(1, "cannot allocate memory"); 115 neaster.len = strlen(buf + 7); 116 continue; 117 } 118 if (strncasecmp(buf, "Paskha=", 7) == 0 && buf[7]) { 119 if (npaskha.name != NULL) 120 free(npaskha.name); 121 if ((npaskha.name = strdup(buf + 7)) == NULL) 122 errx(1, "cannot allocate memory"); 123 npaskha.len = strlen(buf + 7); 124 continue; 125 } 126 if (buf[0] != '\t') { 127 printing = isnow(buf, &month, &day, &var) ? 1 : 0; 128 if ((p = strchr(buf, '\t')) == NULL) 129 continue; 130 if (p > buf && p[-1] == '*') 131 var = 1; 132 if (printing) { 133 struct tm tm; 134 char dbuf[80]; 135 136 if (d_first < 0) 137 d_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 138 tm.tm_sec = 0; /* unused */ 139 tm.tm_min = 0; /* unused */ 140 tm.tm_hour = 0; /* unused */ 141 tm.tm_wday = 0; /* unused */ 142 tm.tm_mon = month - 1; 143 tm.tm_mday = day; 144 tm.tm_year = tp->tm_year; /* unused */ 145 (void)strftime(dbuf, sizeof(dbuf), 146 d_first ? "%e %b" : "%b %e", 147 &tm); 148 (void)fprintf(fp, "%s%c%s\n", dbuf, 149 var ? '*' : ' ', p); 150 } 151 } 152 else if (printing) 153 fprintf(fp, "%s\n", buf); 154 } 155 closecal(fp); 156 } 157 158 int 159 getfield(char *p, char **endp, int *flags) 160 { 161 int val, var; 162 char *start, savech; 163 164 for (; !isdigit((unsigned char)*p) && !isalpha((unsigned char)*p) && *p != '*'; ++p); 165 if (*p == '*') { /* `*' is current month */ 166 *flags |= F_ISMONTH; 167 *endp = p+1; 168 return (tp->tm_mon + 1); 169 } 170 if (isdigit((unsigned char)*p)) { 171 val = strtol(p, &p, 10); /* if 0, it's failure */ 172 for (; !isdigit((unsigned char)*p) && !isalpha((unsigned char)*p) && *p != '*'; ++p); 173 *endp = p; 174 return (val); 175 } 176 for (start = p; isalpha((unsigned char)*++p);); 177 178 /* Sunday-1 */ 179 if (*p == '+' || *p == '-') 180 for(; isdigit((unsigned char)*++p);); 181 182 savech = *p; 183 *p = '\0'; 184 185 /* Month */ 186 if ((val = getmonth(start)) != 0) 187 *flags |= F_ISMONTH; 188 189 /* Day */ 190 else if ((val = getday(start)) != 0) { 191 *flags |= F_ISDAY; 192 193 /* variable weekday */ 194 if ((var = getdayvar(start)) != 0) { 195 if (var <=5 && var >= -4) 196 val += var * 10; 197 #ifdef DEBUG 198 printf("var: %d\n", var); 199 #endif 200 } 201 } 202 203 /* Easter */ 204 else if ((val = geteaster(start, tp->tm_year + 1900)) != 0) 205 *flags |= F_EASTER; 206 207 /* Paskha */ 208 else if ((val = getpaskha(start, tp->tm_year + 1900)) != 0) 209 *flags |= F_EASTER; 210 211 /* undefined rest */ 212 else { 213 *p = savech; 214 return (0); 215 } 216 for (*p = savech; !isdigit((unsigned char)*p) && !isalpha((unsigned char)*p) && *p != '*'; ++p); 217 *endp = p; 218 return (val); 219 } 220 221 char path[MAXPATHLEN]; 222 223 FILE * 224 opencal(void) 225 { 226 uid_t uid; 227 size_t i; 228 int fd, found, pdes[2]; 229 struct stat sbuf; 230 231 /* open up calendar file as stdin */ 232 if (!freopen(calendarFile, "r", stdin)) { 233 if (doall) { 234 if (chdir(calendarHomes[0]) != 0) 235 return (NULL); 236 if (stat(calendarNoMail, &sbuf) == 0) 237 return (NULL); 238 if (!freopen(calendarFile, "r", stdin)) 239 return (NULL); 240 } else { 241 chdir(getenv("HOME")); 242 for (found = i = 0; i < sizeof(calendarHomes) / 243 sizeof(calendarHomes[0]); i++) 244 if (chdir(calendarHomes[i]) == 0 && 245 freopen(calendarFile, "r", stdin)) { 246 found = 1; 247 break; 248 } 249 if (!found) 250 errx(1, "no calendar file: ``%s''", calendarFile); 251 } 252 } 253 if (pipe(pdes) < 0) 254 return (NULL); 255 switch (fork()) { 256 case -1: /* error */ 257 (void)close(pdes[0]); 258 (void)close(pdes[1]); 259 return (NULL); 260 case 0: 261 /* child -- stdin already setup, set stdout to pipe input */ 262 if (pdes[1] != STDOUT_FILENO) { 263 (void)dup2(pdes[1], STDOUT_FILENO); 264 (void)close(pdes[1]); 265 } 266 (void)close(pdes[0]); 267 uid = geteuid(); 268 if (setuid(getuid()) < 0) { 269 warnx("first setuid failed"); 270 _exit(1); 271 }; 272 if (setgid(getegid()) < 0) { 273 warnx("setgid failed"); 274 _exit(1); 275 } 276 if (setuid(uid) < 0) { 277 warnx("setuid failed"); 278 _exit(1); 279 } 280 execl(_PATH_CPP, "cpp", "-P", 281 "-traditional", "-nostdinc", /* GCC specific opts */ 282 "-I.", "-I", _PATH_INCLUDE, (char *)NULL); 283 warn(_PATH_CPP); 284 _exit(1); 285 } 286 /* parent -- set stdin to pipe output */ 287 (void)dup2(pdes[0], STDIN_FILENO); 288 (void)close(pdes[0]); 289 (void)close(pdes[1]); 290 291 /* not reading all calendar files, just set output to stdout */ 292 if (!doall) 293 return (stdout); 294 295 /* set output to a temporary file, so if no output don't send mail */ 296 (void)snprintf(path, sizeof(path), "%s/_calXXXXXX", _PATH_TMP); 297 if ((fd = mkstemp(path)) < 0) 298 return (NULL); 299 return (fdopen(fd, "w+")); 300 } 301 302 void 303 closecal(FILE *fp) 304 { 305 uid_t uid; 306 struct stat sbuf; 307 int nread, pdes[2], status; 308 char buf[1024]; 309 310 if (!doall) 311 return; 312 313 (void)rewind(fp); 314 if (fstat(fileno(fp), &sbuf) || !sbuf.st_size) 315 goto done; 316 if (pipe(pdes) < 0) 317 goto done; 318 switch (fork()) { 319 case -1: /* error */ 320 (void)close(pdes[0]); 321 (void)close(pdes[1]); 322 goto done; 323 case 0: 324 /* child -- set stdin to pipe output */ 325 if (pdes[0] != STDIN_FILENO) { 326 (void)dup2(pdes[0], STDIN_FILENO); 327 (void)close(pdes[0]); 328 } 329 (void)close(pdes[1]); 330 uid = geteuid(); 331 if (setuid(getuid()) < 0) { 332 warnx("setuid failed"); 333 _exit(1); 334 }; 335 if (setgid(getegid()) < 0) { 336 warnx("setgid failed"); 337 _exit(1); 338 } 339 if (setuid(uid) < 0) { 340 warnx("setuid failed"); 341 _exit(1); 342 } 343 execl(_PATH_SENDMAIL, "sendmail", "-i", "-t", "-F", 344 "\"Reminder Service\"", (char *)NULL); 345 warn(_PATH_SENDMAIL); 346 _exit(1); 347 } 348 /* parent -- write to pipe input */ 349 (void)close(pdes[0]); 350 351 header[1].iov_base = header[3].iov_base = pw->pw_name; 352 header[1].iov_len = header[3].iov_len = strlen(pw->pw_name); 353 writev(pdes[1], header, 7); 354 while ((nread = read(fileno(fp), buf, sizeof(buf))) > 0) 355 (void)write(pdes[1], buf, nread); 356 (void)close(pdes[1]); 357 done: (void)fclose(fp); 358 (void)unlink(path); 359 while (wait(&status) >= 0); 360 } 361