Mercurial > hg > toybox
annotate toys/pending/syslogd.c @ 1028:58bfd974216d draft
syslogd: cleanup
- fix bugs introduced in the cleanups
- inline addrfds() and open_unix_socks() and simplify them
- use xpidfile()
- remove isNetwork from struct logfile
- invert the meaning of facility and level in struct logfile so
that they are automatically correctly initialized
- fix memory leak regarding the filenames of logfiles
- TT.sd was unused
| author | Felix Janda <felix.janda at posteo.de> |
|---|---|
| date | Mon, 26 Aug 2013 21:55:33 +0200 |
| parents | 4b0ad1c7af42 |
| children | cbc467592b2e |
| rev | line source |
|---|---|
| 960 | 1 /* syslogd.c - a system logging utility. |
| 2 * | |
| 3 * Copyright 2013 Madhur Verma <mad.flexi@gmail.com> | |
|
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4 * Copyright 2013 Kyungwan Han <asura321@gmail.com> |
| 960 | 5 * |
| 6 * No Standard | |
| 7 | |
| 8 USE_SYSLOGD(NEWTOY(syslogd,">0l#<1>8=8R:b#<0>99=1s#<0=200m#<0>71582787=20O:p:f:a:nSKLD", TOYFLAG_SBIN|TOYFLAG_STAYROOT)) | |
| 9 | |
| 10 config SYSLOGD | |
| 11 bool "syslogd" | |
| 12 default n | |
| 13 help | |
| 1021 | 14 Usage: syslogd [-a socket] [-O logfile] [-f config file] [-m interval] |
| 960 | 15 [-p socket] [-s SIZE] [-b N] [-R HOST] [-l N] [-nSLKD] |
| 16 | |
| 17 System logging utility | |
| 18 | |
| 19 -a Extra unix socket for listen | |
| 20 -O FILE Default log file <DEFAULT: /var/log/messages> | |
| 21 -f FILE Config file <DEFAULT: /etc/syslog.conf> | |
| 22 -p Alternative unix domain socket <DEFAULT : /dev/log> | |
| 23 -n Avoid auto-backgrounding. | |
| 24 -S Smaller output | |
| 25 -m MARK interval <DEFAULT: 20 minutes> (RANGE: 0 to 71582787) | |
| 26 -R HOST Log to IP or hostname on PORT (default PORT=514/UDP)" | |
| 27 -L Log locally and via network (default is network only if -R)" | |
| 28 -s SIZE Max size (KB) before rotation (default:200KB, 0=off) | |
| 29 -b N rotated logs to keep (default:1, max=99, 0=purge) | |
| 30 -K Log to kernel printk buffer (use dmesg to read it) | |
| 31 -l N Log only messages more urgent than prio(default:8 max:8 min:1) | |
| 32 -D Drop duplicates | |
| 33 */ | |
| 34 | |
| 35 #define FOR_syslogd | |
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36 #define SYSLOG_NAMES |
| 960 | 37 #include "toys.h" |
| 38 #include "toynet.h" | |
| 39 | |
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40 // UNIX Sockets for listening |
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41 struct unsocks { |
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42 struct unsocks *next; |
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43 char *path; |
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44 struct sockaddr_un sdu; |
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45 int sd; |
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46 }; |
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47 |
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48 // Log file entry to log into. |
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49 struct logfile { |
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50 struct logfile *next; |
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51 char *filename; |
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52 uint32_t facility[8]; |
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53 uint8_t level[LOG_NFACILITIES]; |
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54 int logfd; |
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55 struct sockaddr_in saddr; |
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56 }; |
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57 |
| 960 | 58 GLOBALS( |
| 59 char *socket; | |
| 60 char *config_file; | |
| 61 char *unix_socket; | |
| 62 char *logfile; | |
| 63 long interval; | |
| 64 long rot_size; | |
| 65 long rot_count; | |
| 66 char *remote_log; | |
| 67 long log_prio; | |
| 68 | |
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69 struct unsocks *lsocks; // list of listen sockets |
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70 struct logfile *lfiles; // list of write logfiles |
| 1021 | 71 int sigfd[2]; |
| 960 | 72 ) |
| 73 | |
| 1025 | 74 // Lookup numerical code from name |
| 75 // Also used in logger | |
| 76 int logger_lookup(int where, char *key) | |
| 77 { | |
| 78 CODE *w = ((CODE *[]){facilitynames, prioritynames})[where]; | |
| 79 | |
| 80 for (; w->c_name; w++) | |
| 81 if (!strcasecmp(key, w->c_name)) return w->c_val; | |
| 82 | |
| 83 return -1; | |
| 84 } | |
| 85 | |
| 86 //search the given name and return its value | |
| 87 static char *dec(int val, CODE *clist) | |
| 88 { | |
| 89 for (; clist->c_name; clist++) | |
| 90 if (val == clist->c_val) return clist->c_name; | |
| 91 return itoa(val); | |
| 92 } | |
| 93 | |
| 960 | 94 /* |
| 95 * recurses the logfile list and resolves config | |
| 96 * for evry file and updates facilty and log level bits. | |
| 97 */ | |
| 1027 | 98 static int resolve_config(struct logfile *file, char *config) |
| 960 | 99 { |
| 1027 | 100 char *tk; |
| 960 | 101 |
| 1027 | 102 for (tk = strtok(config, "; \0"); tk; tk = strtok(NULL, "; \0")) { |
| 1025 | 103 char *fac = tk, *lvl; |
| 104 int i = 0; | |
| 105 unsigned facval = 0; | |
| 106 uint8_t set, levval, bits = 0; | |
| 107 | |
| 960 | 108 tk = strchr(fac, '.'); |
| 109 if (!tk) return -1; | |
| 110 *tk = '\0'; | |
| 111 lvl = tk + 1; | |
| 112 | |
| 1025 | 113 for (;;) { |
| 114 char *nfac = strchr(fac, ','); | |
| 115 | |
| 116 if (nfac) *nfac = '\0'; | |
| 960 | 117 if (*fac == '*') { |
| 118 facval = 0xFFFFFFFF; | |
| 1025 | 119 if (fac[1]) return -1; |
| 120 } else { | |
| 121 if ((i = logger_lookup(0, fac)) == -1) return -1; | |
| 122 facval |= (1 << LOG_FAC(i)); | |
| 960 | 123 } |
| 1025 | 124 if (nfac) fac = nfac + 1; |
| 960 | 125 else break; |
| 126 } | |
| 127 | |
| 128 levval = 0; | |
| 1027 | 129 for (tk = "!=*"; *tk; tk++, bits <<= 1) { |
| 1025 | 130 if (*lvl == *tk) { |
| 131 bits++; | |
| 132 lvl++; | |
| 133 } | |
| 960 | 134 } |
| 1028 | 135 if (bits & 2) levval = 0xff; |
| 136 if (*lvl) { | |
| 1025 | 137 if ((i = logger_lookup(1, lvl)) == -1) return -1; |
| 1028 | 138 levval |= (bits & 4) ? LOG_MASK(i) : LOG_UPTO(i); |
| 139 if (bits & 8) levval = ~levval; | |
| 960 | 140 } |
| 141 | |
| 1025 | 142 for (i = 0, set = levval; set; set >>= 1, i++) |
| 1028 | 143 if (set & 0x1) file->facility[i] |= ~facval; |
| 1025 | 144 for (i = 0; i < LOG_NFACILITIES; facval >>= 1, i++) |
| 1028 | 145 if (facval & 0x1) file->level[i] |= ~levval; |
| 960 | 146 } |
| 147 | |
| 148 return 0; | |
| 149 } | |
| 150 | |
| 151 // Parse config file and update the log file list. | |
| 152 static int parse_config_file(void) | |
| 153 { | |
| 1021 | 154 struct logfile *file; |
| 1025 | 155 FILE *fp; |
| 1027 | 156 char *confline, *tk[2]; |
| 157 int len, lineno = 0; | |
| 1025 | 158 size_t linelen; |
| 960 | 159 /* |
| 160 * if -K then open only /dev/kmsg | |
| 161 * all other log files are neglected | |
| 162 * thus no need to open config either. | |
| 163 */ | |
| 1024 | 164 if (toys.optflags & FLAG_K) { |
| 1021 | 165 file = xzalloc(sizeof(struct logfile)); |
| 1028 | 166 file->filename = xstrdup("/dev/kmsg"); |
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167 TT.lfiles = file; |
| 960 | 168 return 0; |
| 169 } | |
| 170 /* | |
| 171 * if -R then add remote host to log list | |
| 172 * if -L is not provided all other log | |
| 173 * files are neglected thus no need to | |
| 174 * open config either so just return. | |
| 175 */ | |
| 1025 | 176 if (toys.optflags & FLAG_R) { |
| 177 file = xzalloc(sizeof(struct logfile)); | |
| 178 file->filename = xmsprintf("@%s",TT.remote_log); | |
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179 TT.lfiles = file; |
| 1025 | 180 if (!(toys.optflags & FLAG_L)) return 0; |
| 181 } | |
| 960 | 182 /* |
| 183 * Read config file and add logfiles to the list | |
| 184 * with their configuration. | |
| 185 */ | |
| 1028 | 186 if (!(fp = fopen(TT.config_file, "r")) && (toys.optflags & FLAG_f)) |
| 960 | 187 perror_exit("can't open '%s'", TT.config_file); |
| 188 | |
| 1027 | 189 for (linelen = 0; fp;) { |
| 190 confline = NULL; | |
| 1025 | 191 len = getline(&confline, &linelen, fp); |
| 960 | 192 if (len <= 0) break; |
| 193 lineno++; | |
| 194 for (; *confline == ' '; confline++, len--) ; | |
| 195 if ((confline[0] == '#') || (confline[0] == '\n')) continue; | |
| 1027 | 196 tk[0] = confline; |
| 197 for (; len && !(*tk[0]==' ' || *tk[0]=='\t'); tk[0]++, len--); | |
| 198 for (tk[1] = tk[0]; len && (*tk[1]==' ' || *tk[1]=='\t'); tk[1]++, len--); | |
| 199 if (!len || (len == 1 && *tk[1] == '\n')) { | |
| 200 error_msg("error in '%s' at line %d", TT.config_file, lineno); | |
| 201 return -1; | |
| 202 } | |
| 203 else if (*(tk[1] + len - 1) == '\n') *(tk[1] + len - 1) = '\0'; | |
| 204 *tk[0] = '\0'; | |
| 205 if (*tk[1] != '*') { | |
| 206 file = TT.lfiles; | |
| 207 while (file && strcmp(file->filename, tk[1])) file = file->next; | |
| 208 if (!file) { | |
| 209 file = xzalloc(sizeof(struct logfile)); | |
| 210 file->filename = xstrdup(tk[1]); | |
| 211 file->next = TT.lfiles; | |
| 212 TT.lfiles = file; | |
| 213 } | |
| 214 if (resolve_config(file, confline) == -1) { | |
| 960 | 215 error_msg("error in '%s' at line %d", TT.config_file, lineno); |
| 216 return -1; | |
| 217 } | |
| 218 } | |
| 219 free(confline); | |
| 220 } | |
| 221 /* | |
| 222 * Can't open config file or support is not enabled | |
| 223 * adding default logfile to the head of list. | |
| 224 */ | |
| 225 if (!fp){ | |
| 1021 | 226 file = xzalloc(sizeof(struct logfile)); |
| 1028 | 227 file->filename = xstrdup((toys.optflags & FLAG_O) ? |
| 228 TT.logfile : "/var/log/messages"); //DEFLOGFILE | |
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229 file->next = TT.lfiles; |
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230 TT.lfiles = file; |
| 1025 | 231 } else fclose(fp); |
| 960 | 232 return 0; |
| 233 } | |
| 234 | |
| 235 // open every log file in list. | |
| 236 static void open_logfiles(void) | |
| 237 { | |
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238 struct logfile *tfd; |
| 1024 | 239 |
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240 for (tfd = TT.lfiles; tfd; tfd = tfd->next) { |
| 1024 | 241 char *p, *tmpfile; |
| 242 long port = 514; | |
| 243 | |
| 1028 | 244 if (*tfd->filename == '@') { // network |
| 1024 | 245 struct addrinfo *info, rp; |
| 246 | |
| 247 tmpfile = xstrdup(tfd->filename + 1); | |
| 248 if ((p = strchr(tmpfile, ':'))) { | |
| 249 char *endptr; | |
| 960 | 250 |
| 251 *p = '\0'; | |
| 1024 | 252 port = strtol(++p, &endptr, 10); |
| 253 if (*endptr || endptr == p || port < 0 || port > 65535) | |
| 254 error_exit("bad port in %s", tfd->filename); | |
| 960 | 255 } |
| 1024 | 256 memset(&rp, 0, sizeof(rp)); |
| 257 rp.ai_family = AF_INET; | |
| 258 rp.ai_socktype = SOCK_DGRAM; | |
| 259 rp.ai_protocol = IPPROTO_UDP; | |
| 260 | |
| 261 if (getaddrinfo(tmpfile, NULL, &rp, &info) || !info) | |
| 262 perror_exit("BAD ADDRESS: can't find : %s ", tmpfile); | |
| 263 ((struct sockaddr_in*)info->ai_addr)->sin_port = htons(port); | |
| 264 memcpy(&tfd->saddr, info->ai_addr, info->ai_addrlen); | |
| 265 freeaddrinfo(info); | |
| 266 | |
| 267 tfd->logfd = xsocket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); | |
| 960 | 268 free(tmpfile); |
| 269 } else tfd->logfd = open(tfd->filename, O_CREAT | O_WRONLY | O_APPEND, 0666); | |
| 270 if (tfd->logfd < 0) { | |
| 271 tfd->filename = "/dev/console"; | |
| 272 tfd->logfd = open(tfd->filename, O_APPEND); | |
| 273 } | |
| 274 } | |
| 275 } | |
| 276 | |
| 277 //write to file with rotation | |
| 1021 | 278 static int write_rotate(struct logfile *tf, int len) |
| 960 | 279 { |
| 280 int size, isreg; | |
| 281 struct stat statf; | |
| 282 isreg = (!fstat(tf->logfd, &statf) && S_ISREG(statf.st_mode)); | |
| 283 size = statf.st_size; | |
| 284 | |
| 1024 | 285 if ((toys.optflags & FLAG_s) || (toys.optflags & FLAG_b)) { |
| 960 | 286 if (TT.rot_size && isreg && (size + len) > (TT.rot_size*1024)) { |
| 287 if (TT.rot_count) { /* always 0..99 */ | |
| 288 int i = strlen(tf->filename) + 3 + 1; | |
| 289 char old_file[i]; | |
| 290 char new_file[i]; | |
| 291 i = TT.rot_count - 1; | |
| 292 while (1) { | |
| 293 sprintf(new_file, "%s.%d", tf->filename, i); | |
| 294 if (!i) break; | |
| 295 sprintf(old_file, "%s.%d", tf->filename, --i); | |
| 296 rename(old_file, new_file); | |
| 297 } | |
| 298 rename(tf->filename, new_file); | |
| 299 unlink(tf->filename); | |
| 300 close(tf->logfd); | |
| 301 tf->logfd = open(tf->filename, O_CREAT | O_WRONLY | O_APPEND, 0666); | |
| 302 } | |
| 303 ftruncate(tf->logfd, 0); | |
| 304 } | |
| 305 } | |
| 306 return write(tf->logfd, toybuf, len); | |
| 307 } | |
| 308 | |
| 309 //Parse messege and write to file. | |
| 310 static void logmsg(char *msg, int len) | |
| 311 { | |
| 312 time_t now; | |
| 313 char *p, *ts, *lvlstr, *facstr; | |
| 314 struct utsname uts; | |
| 315 int pri = 0; | |
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316 struct logfile *tf = TT.lfiles; |
| 960 | 317 |
| 318 char *omsg = msg; | |
| 319 int olen = len, fac, lvl; | |
| 320 | |
| 321 if (*msg == '<') { // Extract the priority no. | |
| 322 pri = (int) strtoul(msg + 1, &p, 10); | |
| 323 if (*p == '>') msg = p + 1; | |
| 324 } | |
| 325 /* Jan 18 00:11:22 msg... | |
| 326 * 01234567890123456 | |
| 327 */ | |
| 328 if (len < 16 || msg[3] != ' ' || msg[6] != ' ' || msg[9] != ':' | |
| 329 || msg[12] != ':' || msg[15] != ' ') { | |
| 330 time(&now); | |
| 331 ts = ctime(&now) + 4; /* skip day of week */ | |
| 332 } else { | |
| 333 now = 0; | |
| 334 ts = msg; | |
| 335 msg += 16; | |
| 336 } | |
| 337 ts[15] = '\0'; | |
| 338 fac = LOG_FAC(pri); | |
| 339 lvl = LOG_PRI(pri); | |
| 340 | |
| 1024 | 341 if (toys.optflags & FLAG_K) len = sprintf(toybuf, "<%d> %s\n", pri, msg); |
| 342 else { | |
| 1027 | 343 facstr = dec(pri & LOG_FACMASK, facilitynames); |
| 1025 | 344 lvlstr = dec(LOG_PRI(pri), prioritynames); |
| 960 | 345 |
| 1024 | 346 p = "local"; |
| 347 if (!uname(&uts)) p = uts.nodename; | |
| 348 if (toys.optflags & FLAG_S) len = sprintf(toybuf, "%s %s\n", ts, msg); | |
| 349 else len = sprintf(toybuf, "%s %s %s.%s %s\n", ts, p, facstr, lvlstr, msg); | |
| 350 } | |
| 960 | 351 if (lvl >= TT.log_prio) return; |
| 352 | |
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353 for (; tf; tf = tf->next) { |
| 960 | 354 if (tf->logfd > 0) { |
| 1028 | 355 if (!((tf->facility[lvl] & (1 << fac)) || (tf->level[fac] & (1<<lvl)))) { |
| 356 int wlen, isNetwork = *tf->filename == '@'; | |
| 357 if (isNetwork) | |
| 960 | 358 wlen = sendto(tf->logfd, omsg, olen, 0, (struct sockaddr*)&tf->saddr, sizeof(tf->saddr)); |
| 359 else wlen = write_rotate(tf, len); | |
| 1028 | 360 if (wlen < 0) perror_msg("write failed file : %s ", tf->filename + isNetwork); |
| 960 | 361 } |
| 362 } | |
| 363 } | |
| 364 } | |
| 365 | |
| 366 /* | |
| 367 * closes all read and write fds | |
| 368 * and frees all nodes and lists | |
| 369 */ | |
| 370 static void cleanup(void) | |
| 371 { | |
| 372 while (TT.lsocks) { | |
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373 struct unsocks *fnode = TT.lsocks; |
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374 |
| 1028 | 375 if (fnode->sd >= 0) { |
| 376 close(fnode->sd); | |
| 377 unlink(fnode->path); | |
| 378 } | |
| 960 | 379 TT.lsocks = fnode->next; |
| 380 free(fnode); | |
| 381 } | |
| 382 | |
| 383 while (TT.lfiles) { | |
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384 struct logfile *fnode = TT.lfiles; |
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385 |
| 1028 | 386 free(fnode->filename); |
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387 if (fnode->logfd >= 0) close(fnode->logfd); |
| 960 | 388 TT.lfiles = fnode->next; |
| 389 free(fnode); | |
| 390 } | |
| 391 } | |
| 392 | |
| 393 static void signal_handler(int sig) | |
| 394 { | |
| 395 unsigned char ch = sig; | |
| 1021 | 396 if (write(TT.sigfd[1], &ch, 1) != 1) error_msg("can't send signal"); |
| 960 | 397 } |
| 398 | |
| 399 void syslogd_main(void) | |
| 400 { | |
| 1021 | 401 struct unsocks *tsd; |
| 1028 | 402 int nfds, retval, last_len=0; |
| 960 | 403 struct timeval tv; |
| 1028 | 404 fd_set rfds; // fds for reading |
| 960 | 405 char *temp, *buffer = (toybuf +2048), *last_buf = (toybuf + 3072); //these two buffs are of 1K each |
| 406 | |
| 1024 | 407 if ((toys.optflags & FLAG_p) && (strlen(TT.unix_socket) > 108)) |
| 960 | 408 error_exit("Socket path should not be more than 108"); |
| 409 | |
| 1024 | 410 TT.config_file = (toys.optflags & FLAG_f) ? |
| 411 TT.config_file : "/etc/syslog.conf"; //DEFCONFFILE | |
| 960 | 412 init_jumpin: |
| 1021 | 413 tsd = xzalloc(sizeof(struct unsocks)); |
| 960 | 414 |
| 1024 | 415 tsd->path = (toys.optflags & FLAG_p) ? TT.unix_socket : "/dev/log"; // DEFLOGSOCK |
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416 TT.lsocks = tsd; |
| 960 | 417 |
| 1024 | 418 if (toys.optflags & FLAG_a) { |
| 960 | 419 for (temp = strtok(TT.socket, ":"); temp; temp = strtok(NULL, ":")) { |
| 420 if (strlen(temp) > 107) temp[108] = '\0'; | |
| 1021 | 421 tsd = xzalloc(sizeof(struct unsocks)); |
| 960 | 422 tsd->path = temp; |
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423 tsd->next = TT.lsocks; |
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424 TT.lsocks = tsd; |
| 960 | 425 } |
| 426 } | |
| 1028 | 427 /* |
| 428 * initializes unsock_t structure | |
| 429 * and opens socket for reading | |
| 430 * and adds to global lsock list. | |
| 431 */ | |
| 432 nfds = 0; | |
| 433 for (tsd = TT.lsocks; tsd; tsd = tsd->next) { | |
| 434 tsd->sdu.sun_family = AF_UNIX; | |
| 435 strcpy(tsd->sdu.sun_path, tsd->path); | |
| 436 tsd->sd = socket(AF_UNIX, SOCK_DGRAM, 0); | |
| 437 if (tsd->sd < 0) { | |
| 438 perror_msg("OPEN SOCKS : failed"); | |
| 439 continue; | |
| 440 } | |
| 441 unlink(tsd->sdu.sun_path); | |
| 442 if (bind(tsd->sd, (struct sockaddr *) &tsd->sdu, sizeof(tsd->sdu))) { | |
| 443 perror_msg("BIND SOCKS : failed sock : %s", tsd->sdu.sun_path); | |
| 444 close(tsd->sd); | |
| 445 continue; | |
| 446 } | |
| 447 chmod(tsd->path, 0777); | |
| 448 nfds++; | |
| 449 } | |
| 450 if (!nfds) { | |
| 960 | 451 error_msg("Can't open single socket for listenning."); |
| 452 goto clean_and_exit; | |
| 453 } | |
| 1021 | 454 |
| 455 // Setup signals | |
| 456 if (pipe(TT.sigfd) < 0) error_exit("pipe failed\n"); | |
| 457 | |
| 458 fcntl(TT.sigfd[1] , F_SETFD, FD_CLOEXEC); | |
| 459 fcntl(TT.sigfd[0] , F_SETFD, FD_CLOEXEC); | |
| 460 int flags = fcntl(TT.sigfd[1], F_GETFL); | |
| 461 fcntl(TT.sigfd[1], F_SETFL, flags | O_NONBLOCK); | |
| 462 signal(SIGHUP, signal_handler); | |
| 463 signal(SIGTERM, signal_handler); | |
| 464 signal(SIGINT, signal_handler); | |
| 465 signal(SIGQUIT, signal_handler); | |
| 466 | |
| 960 | 467 if (parse_config_file() == -1) goto clean_and_exit; |
| 468 open_logfiles(); | |
| 1024 | 469 if (!(toys.optflags & FLAG_n)) { |
| 1028 | 470 daemonize(); |
|
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471 //don't daemonize again if SIGHUP received. |
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472 toys.optflags |= FLAG_n; |
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473 } |
| 1028 | 474 xpidfile("syslogd"); |
| 960 | 475 |
| 476 logmsg("<46>Toybox: syslogd started", 27); //27 : the length of message | |
| 477 for (;;) { | |
| 1028 | 478 // Add opened socks to rfds for select() |
| 479 FD_ZERO(&rfds); | |
| 480 for (tsd = TT.lsocks; tsd; tsd = tsd->next) FD_SET(tsd->sd, &rfds); | |
| 481 FD_SET(TT.sigfd[0], &rfds); | |
| 960 | 482 tv.tv_usec = 0; |
| 483 tv.tv_sec = TT.interval*60; | |
| 484 | |
| 1028 | 485 retval = select(TT.sigfd[0] + 1, &rfds, NULL, NULL, (TT.interval)?&tv:NULL); |
| 486 if (retval < 0) { | |
| 487 if (errno != EINTR) perror_msg("Error in select "); | |
| 960 | 488 } |
| 1028 | 489 else if (!retval) logmsg("<46>-- MARK --", 14); |
| 490 else if (FD_ISSET(TT.sigfd[0], &rfds)) { /* May be a signal */ | |
| 960 | 491 unsigned char sig; |
| 492 | |
| 1021 | 493 if (read(TT.sigfd[0], &sig, 1) != 1) { |
| 960 | 494 error_msg("signal read failed.\n"); |
| 495 continue; | |
| 496 } | |
| 497 switch(sig) { | |
| 498 case SIGTERM: /* FALLTHROUGH */ | |
| 499 case SIGINT: /* FALLTHROUGH */ | |
| 500 case SIGQUIT: | |
| 501 logmsg("<46>syslogd exiting", 19); | |
| 502 if (CFG_TOYBOX_FREE ) cleanup(); | |
| 503 signal(sig, SIG_DFL); | |
| 504 sigset_t ss; | |
| 505 sigemptyset(&ss); | |
| 506 sigaddset(&ss, sig); | |
| 507 sigprocmask(SIG_UNBLOCK, &ss, NULL); | |
| 508 raise(sig); | |
| 509 _exit(1); /* Should not reach it */ | |
| 510 break; | |
| 511 case SIGHUP: | |
| 512 logmsg("<46>syslogd exiting", 19); | |
| 513 cleanup(); //cleanup is done, as we restart syslog. | |
| 514 goto init_jumpin; | |
| 515 default: break; | |
| 516 } | |
| 1028 | 517 } else { /* Some activity on listen sockets. */ |
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diff
changeset
|
518 for (tsd = TT.lsocks; tsd; tsd = tsd->next) { |
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diff
changeset
|
519 int sd = tsd->sd; |
| 1028 | 520 if (FD_ISSET(sd, &rfds)) { |
| 960 | 521 int len = read(sd, buffer, 1023); //buffer is of 1K, hence readingonly 1023 bytes, 1 for NUL |
| 522 if (len > 0) { | |
| 523 buffer[len] = '\0'; | |
| 1024 | 524 if((toys.optflags & FLAG_D) && (len == last_len)) |
| 960 | 525 if (!memcmp(last_buf, buffer, len)) break; |
| 526 | |
| 527 memcpy(last_buf, buffer, len); | |
| 528 last_len = len; | |
| 529 logmsg(buffer, len); | |
| 530 } | |
| 531 break; | |
| 532 } | |
| 533 } | |
| 534 } | |
| 535 } | |
| 536 clean_and_exit: | |
| 537 logmsg("<46>syslogd exiting", 19); | |
| 538 if (CFG_TOYBOX_FREE ) cleanup(); | |
| 539 } |