Annotation of src/usr.bin/calendar/io.c, Revision 1.1
1.1 ! millert 1: /* $OpenBSD: $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1989, 1993, 1994
! 5: * The Regents of the University of California. All rights reserved.
! 6: *
! 7: * Redistribution and use in source and binary forms, with or without
! 8: * modification, are permitted provided that the following conditions
! 9: * are met:
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: * 3. All advertising materials mentioning features or use of this software
! 16: * must display the following acknowledgement:
! 17: * This product includes software developed by the University of
! 18: * California, Berkeley and its contributors.
! 19: * 4. Neither the name of the University nor the names of its contributors
! 20: * may be used to endorse or promote products derived from this software
! 21: * without specific prior written permission.
! 22: *
! 23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 33: * SUCH DAMAGE.
! 34: */
! 35:
! 36: #ifndef lint
! 37: static const char copyright[] =
! 38: "@(#) Copyright (c) 1989, 1993\n\
! 39: The Regents of the University of California. All rights reserved.\n";
! 40: #endif /* not lint */
! 41:
! 42: #ifndef lint
! 43: #if 0
! 44: static const char sccsid[] = "@(#)calendar.c 8.3 (Berkeley) 3/25/94";
! 45: #else
! 46: static char rcsid[] = "$OpenBSD: $";
! 47: #endif
! 48: #endif /* not lint */
! 49:
! 50: #include <sys/param.h>
! 51: #include <sys/stat.h>
! 52: #include <sys/time.h>
! 53: #include <sys/types.h>
! 54: #include <sys/uio.h>
! 55: #include <sys/wait.h>
! 56:
! 57: #include <ctype.h>
! 58: #include <err.h>
! 59: #include <errno.h>
! 60: #include <locale.h>
! 61: #include <pwd.h>
! 62: #include <stdio.h>
! 63: #include <stdlib.h>
! 64: #include <string.h>
! 65: #include <unistd.h>
! 66:
! 67: #include "pathnames.h"
! 68: #include "calendar.h"
! 69:
! 70:
! 71: char *calendarFile = "calendar"; /* default calendar file */
! 72: char *calendarHome = ".calendar"; /* HOME */
! 73: char *calendarNoMail = "nomail"; /* don't sent mail if this file exist */
! 74:
! 75: struct fixs neaster, npaskha;
! 76:
! 77: struct iovec header[] = {
! 78: {"From: ", 6},
! 79: {NULL, 0},
! 80: {" (Reminder Service)\nTo: ", 24},
! 81: {NULL, 0},
! 82: {"\nSubject: ", 10},
! 83: {NULL, 0},
! 84: {"'s Calendar\nPrecedence: bulk\n\n", 30},
! 85: };
! 86:
! 87:
! 88: void
! 89: cal()
! 90: {
! 91: register int printing;
! 92: register char *p;
! 93: FILE *fp;
! 94: int ch, l;
! 95: int month;
! 96: int day;
! 97: int var;
! 98: char buf[2048 + 1];
! 99:
! 100: if ((fp = opencal()) == NULL)
! 101: return;
! 102: for (printing = 0; fgets(buf, sizeof(buf), stdin) != NULL;) {
! 103: if ((p = strchr(buf, '\n')) != NULL)
! 104: *p = '\0';
! 105: else
! 106: while ((ch = getchar()) != '\n' && ch != EOF);
! 107: for (l = strlen(buf);
! 108: l > 0 && isspace(buf[l - 1]);
! 109: l--)
! 110: ;
! 111: buf[l] = '\0';
! 112: if (buf[0] == '\0')
! 113: continue;
! 114: if (strncmp(buf, "LANG=", 5) == 0) {
! 115: (void) setlocale(LC_ALL, buf + 5);
! 116: setnnames();
! 117: continue;
! 118: }
! 119: if (strncasecmp(buf, "Easter=", 7) == 0 && buf[7]) {
! 120: if (neaster.name != NULL)
! 121: free(neaster.name);
! 122: if ((neaster.name = strdup(buf + 7)) == NULL)
! 123: errx(1, "cannot allocate memory");
! 124: neaster.len = strlen(buf + 7);
! 125: continue;
! 126: }
! 127: if (strncasecmp(buf, "Paskha=", 7) == 0 && buf[7]) {
! 128: if (npaskha.name != NULL)
! 129: free(npaskha.name);
! 130: if ((npaskha.name = strdup(buf + 7)) == NULL)
! 131: errx(1, "cannot allocate memory");
! 132: npaskha.len = strlen(buf + 7);
! 133: continue;
! 134: }
! 135: if (buf[0] != '\t') {
! 136: printing = isnow(buf, &month, &day, &var) ? 1 : 0;
! 137: if ((p = strchr(buf, '\t')) == NULL)
! 138: continue;
! 139: if (p > buf && p[-1] == '*')
! 140: var = 1;
! 141: if (printing) {
! 142: struct tm tm;
! 143: char dbuf[30];
! 144:
! 145: tm.tm_sec = 0; /* unused */
! 146: tm.tm_min = 0; /* unused */
! 147: tm.tm_hour = 0; /* unused */
! 148: tm.tm_wday = 0; /* unused */
! 149: tm.tm_mon = month - 1;
! 150: tm.tm_mday = day;
! 151: tm.tm_year = tp->tm_year; /* unused */
! 152: (void)strftime(dbuf, sizeof(dbuf), "%c", &tm);
! 153: dbuf[10] = '\0';
! 154: (void)fprintf(fp, "%s%c%s\n",
! 155: dbuf + 4/* skip weekdays */,
! 156: var ? '*' : ' ', p);
! 157: }
! 158: }
! 159: else if (printing)
! 160: fprintf(fp, "%s\n", buf);
! 161: }
! 162: closecal(fp);
! 163: }
! 164:
! 165: int
! 166: getfield(p, endp, flags)
! 167: char *p, **endp;
! 168: int *flags;
! 169: {
! 170: int val, var;
! 171: char *start, savech;
! 172:
! 173: for (; !isdigit(*p) && !isalpha(*p) && *p != '*'; ++p)
! 174: ;
! 175: if (*p == '*') { /* `*' is current month */
! 176: *flags |= F_ISMONTH;
! 177: *endp = p+1;
! 178: return (tp->tm_mon + 1);
! 179: }
! 180: if (isdigit(*p)) {
! 181: val = strtol(p, &p, 10); /* if 0, it's failure */
! 182: for (; !isdigit(*p) && !isalpha(*p) && *p != '*'; ++p)
! 183: ;
! 184: *endp = p;
! 185: return (val);
! 186: }
! 187: for (start = p; isalpha(*++p);)
! 188: ;
! 189:
! 190: /* Sunday-1 */
! 191: if (*p == '+' || *p == '-')
! 192: for(; isdigit(*++p);)
! 193: ;
! 194:
! 195: savech = *p;
! 196: *p = '\0';
! 197:
! 198: /* Month */
! 199: if ((val = getmonth(start)) != 0)
! 200: *flags |= F_ISMONTH;
! 201:
! 202: /* Day */
! 203: else if ((val = getday(start)) != 0) {
! 204: *flags |= F_ISDAY;
! 205:
! 206: /* variable weekday */
! 207: if ((var = getdayvar(start)) != 0) {
! 208: if (var <=5 && var >= -4)
! 209: val += var * 10;
! 210: #ifdef DEBUG
! 211: printf("var: %d\n", var);
! 212: #endif
! 213: }
! 214: }
! 215:
! 216: /* Easter */
! 217: else if ((val = geteaster(start, tp->tm_year + 1900)) != 0)
! 218: *flags |= F_EASTER;
! 219:
! 220: /* Paskha */
! 221: else if ((val = getpaskha(start, tp->tm_year + 1900)) != 0)
! 222: *flags |= F_EASTER;
! 223:
! 224: /* undefined rest */
! 225: else {
! 226: *p = savech;
! 227: return (0);
! 228: }
! 229: for (*p = savech; !isdigit(*p) && !isalpha(*p) && *p != '*'; ++p)
! 230: ;
! 231: *endp = p;
! 232: return (val);
! 233: }
! 234:
! 235: char path[MAXPATHLEN];
! 236:
! 237: FILE *
! 238: opencal()
! 239: {
! 240: int fd, pdes[2];
! 241: struct stat sbuf;
! 242:
! 243: /* open up calendar file as stdin */
! 244: if (!freopen(calendarFile, "r", stdin)) {
! 245: if (doall) {
! 246: if (chdir(calendarHome) != 0)
! 247: return (NULL);
! 248: if (stat(calendarNoMail, &sbuf) == 0)
! 249: return (NULL);
! 250: if (!freopen(calendarFile, "r", stdin))
! 251: return (NULL);
! 252: } else {
! 253: chdir(getenv("HOME"));
! 254: if (!(chdir(calendarHome) == 0 &&
! 255: freopen(calendarFile, "r", stdin)))
! 256: errx(1, "no calendar file: ``%s'' or ``~/%s/%s\n", calendarFile, calendarHome, calendarFile);
! 257: }
! 258: }
! 259: if (pipe(pdes) < 0)
! 260: return (NULL);
! 261: switch (vfork()) {
! 262: case -1: /* error */
! 263: (void)close(pdes[0]);
! 264: (void)close(pdes[1]);
! 265: return (NULL);
! 266: case 0:
! 267: /* child -- stdin already setup, set stdout to pipe input */
! 268: if (pdes[1] != STDOUT_FILENO) {
! 269: (void)dup2(pdes[1], STDOUT_FILENO);
! 270: (void)close(pdes[1]);
! 271: }
! 272: (void)close(pdes[0]);
! 273: (void)setuid(geteuid());
! 274: (void)setgid(getegid());
! 275: execl(_PATH_CPP, "cpp", "-P", "-I.", _PATH_INCLUDE, NULL);
! 276: warn(_PATH_CPP);
! 277: _exit(1);
! 278: }
! 279: /* parent -- set stdin to pipe output */
! 280: (void)dup2(pdes[0], STDIN_FILENO);
! 281: (void)close(pdes[0]);
! 282: (void)close(pdes[1]);
! 283:
! 284: /* not reading all calendar files, just set output to stdout */
! 285: if (!doall)
! 286: return (stdout);
! 287:
! 288: /* set output to a temporary file, so if no output don't send mail */
! 289: (void)snprintf(path, sizeof(path), "%s/_calXXXXXX", _PATH_TMP);
! 290: if ((fd = mkstemp(path)) < 0)
! 291: return (NULL);
! 292: return (fdopen(fd, "w+"));
! 293: }
! 294:
! 295: void
! 296: closecal(fp)
! 297: FILE *fp;
! 298: {
! 299: struct stat sbuf;
! 300: int nread, pdes[2], status;
! 301: char buf[1024];
! 302:
! 303: if (!doall)
! 304: return;
! 305:
! 306: (void)rewind(fp);
! 307: if (fstat(fileno(fp), &sbuf) || !sbuf.st_size)
! 308: goto done;
! 309: if (pipe(pdes) < 0)
! 310: goto done;
! 311: switch (vfork()) {
! 312: case -1: /* error */
! 313: (void)close(pdes[0]);
! 314: (void)close(pdes[1]);
! 315: goto done;
! 316: case 0:
! 317: /* child -- set stdin to pipe output */
! 318: if (pdes[0] != STDIN_FILENO) {
! 319: (void)dup2(pdes[0], STDIN_FILENO);
! 320: (void)close(pdes[0]);
! 321: }
! 322: (void)close(pdes[1]);
! 323: (void)setuid(geteuid());
! 324: (void)setgid(getegid());
! 325: execl(_PATH_SENDMAIL, "sendmail", "-i", "-t", "-F",
! 326: "\"Reminder Service\"", "-f", "root", NULL);
! 327: warn(_PATH_SENDMAIL);
! 328: _exit(1);
! 329: }
! 330: /* parent -- write to pipe input */
! 331: (void)close(pdes[0]);
! 332:
! 333: header[1].iov_base = header[3].iov_base = pw->pw_name;
! 334: header[1].iov_len = header[3].iov_len = strlen(pw->pw_name);
! 335: writev(pdes[1], header, 7);
! 336: while ((nread = read(fileno(fp), buf, sizeof(buf))) > 0)
! 337: (void)write(pdes[1], buf, nread);
! 338: (void)close(pdes[1]);
! 339: done: (void)fclose(fp);
! 340: (void)unlink(path);
! 341: while (wait(&status) >= 0);
! 342: }
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