Mercurial > hg > toybox
annotate toys/pending/syslogd.c @ 1042:cbc467592b2e draft
Remove itoa/utoa, let libc do this with sprintf.
| author | Rob Landley <rob@landley.net> |
|---|---|
| date | Tue, 03 Sep 2013 08:30:47 -0500 |
| parents | 58bfd974216d |
| children | e11684e3bbc5 |
| 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 | |
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87 static char *dec(int val, CODE *clist, char *buf) |
| 1025 | 88 { |
| 89 for (; clist->c_name; clist++) | |
| 90 if (val == clist->c_val) return clist->c_name; | |
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91 sprintf(buf, "%u", val); |
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92 |
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93 return buf; |
| 1025 | 94 } |
| 95 | |
| 960 | 96 /* |
| 97 * recurses the logfile list and resolves config | |
| 98 * for evry file and updates facilty and log level bits. | |
| 99 */ | |
| 1027 | 100 static int resolve_config(struct logfile *file, char *config) |
| 960 | 101 { |
| 1027 | 102 char *tk; |
| 960 | 103 |
| 1027 | 104 for (tk = strtok(config, "; \0"); tk; tk = strtok(NULL, "; \0")) { |
| 1025 | 105 char *fac = tk, *lvl; |
| 106 int i = 0; | |
| 107 unsigned facval = 0; | |
| 108 uint8_t set, levval, bits = 0; | |
| 109 | |
| 960 | 110 tk = strchr(fac, '.'); |
| 111 if (!tk) return -1; | |
| 112 *tk = '\0'; | |
| 113 lvl = tk + 1; | |
| 114 | |
| 1025 | 115 for (;;) { |
| 116 char *nfac = strchr(fac, ','); | |
| 117 | |
| 118 if (nfac) *nfac = '\0'; | |
| 960 | 119 if (*fac == '*') { |
| 120 facval = 0xFFFFFFFF; | |
| 1025 | 121 if (fac[1]) return -1; |
| 122 } else { | |
| 123 if ((i = logger_lookup(0, fac)) == -1) return -1; | |
| 124 facval |= (1 << LOG_FAC(i)); | |
| 960 | 125 } |
| 1025 | 126 if (nfac) fac = nfac + 1; |
| 960 | 127 else break; |
| 128 } | |
| 129 | |
| 130 levval = 0; | |
| 1027 | 131 for (tk = "!=*"; *tk; tk++, bits <<= 1) { |
| 1025 | 132 if (*lvl == *tk) { |
| 133 bits++; | |
| 134 lvl++; | |
| 135 } | |
| 960 | 136 } |
| 1028 | 137 if (bits & 2) levval = 0xff; |
| 138 if (*lvl) { | |
| 1025 | 139 if ((i = logger_lookup(1, lvl)) == -1) return -1; |
| 1028 | 140 levval |= (bits & 4) ? LOG_MASK(i) : LOG_UPTO(i); |
| 141 if (bits & 8) levval = ~levval; | |
| 960 | 142 } |
| 143 | |
| 1025 | 144 for (i = 0, set = levval; set; set >>= 1, i++) |
| 1028 | 145 if (set & 0x1) file->facility[i] |= ~facval; |
| 1025 | 146 for (i = 0; i < LOG_NFACILITIES; facval >>= 1, i++) |
| 1028 | 147 if (facval & 0x1) file->level[i] |= ~levval; |
| 960 | 148 } |
| 149 | |
| 150 return 0; | |
| 151 } | |
| 152 | |
| 153 // Parse config file and update the log file list. | |
| 154 static int parse_config_file(void) | |
| 155 { | |
| 1021 | 156 struct logfile *file; |
| 1025 | 157 FILE *fp; |
| 1027 | 158 char *confline, *tk[2]; |
| 159 int len, lineno = 0; | |
| 1025 | 160 size_t linelen; |
| 960 | 161 /* |
| 162 * if -K then open only /dev/kmsg | |
| 163 * all other log files are neglected | |
| 164 * thus no need to open config either. | |
| 165 */ | |
| 1024 | 166 if (toys.optflags & FLAG_K) { |
| 1021 | 167 file = xzalloc(sizeof(struct logfile)); |
| 1028 | 168 file->filename = xstrdup("/dev/kmsg"); |
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169 TT.lfiles = file; |
| 960 | 170 return 0; |
| 171 } | |
| 172 /* | |
| 173 * if -R then add remote host to log list | |
| 174 * if -L is not provided all other log | |
| 175 * files are neglected thus no need to | |
| 176 * open config either so just return. | |
| 177 */ | |
| 1025 | 178 if (toys.optflags & FLAG_R) { |
| 179 file = xzalloc(sizeof(struct logfile)); | |
| 180 file->filename = xmsprintf("@%s",TT.remote_log); | |
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181 TT.lfiles = file; |
| 1025 | 182 if (!(toys.optflags & FLAG_L)) return 0; |
| 183 } | |
| 960 | 184 /* |
| 185 * Read config file and add logfiles to the list | |
| 186 * with their configuration. | |
| 187 */ | |
| 1028 | 188 if (!(fp = fopen(TT.config_file, "r")) && (toys.optflags & FLAG_f)) |
| 960 | 189 perror_exit("can't open '%s'", TT.config_file); |
| 190 | |
| 1027 | 191 for (linelen = 0; fp;) { |
| 192 confline = NULL; | |
| 1025 | 193 len = getline(&confline, &linelen, fp); |
| 960 | 194 if (len <= 0) break; |
| 195 lineno++; | |
| 196 for (; *confline == ' '; confline++, len--) ; | |
| 197 if ((confline[0] == '#') || (confline[0] == '\n')) continue; | |
| 1027 | 198 tk[0] = confline; |
| 199 for (; len && !(*tk[0]==' ' || *tk[0]=='\t'); tk[0]++, len--); | |
| 200 for (tk[1] = tk[0]; len && (*tk[1]==' ' || *tk[1]=='\t'); tk[1]++, len--); | |
| 201 if (!len || (len == 1 && *tk[1] == '\n')) { | |
| 202 error_msg("error in '%s' at line %d", TT.config_file, lineno); | |
| 203 return -1; | |
| 204 } | |
| 205 else if (*(tk[1] + len - 1) == '\n') *(tk[1] + len - 1) = '\0'; | |
| 206 *tk[0] = '\0'; | |
| 207 if (*tk[1] != '*') { | |
| 208 file = TT.lfiles; | |
| 209 while (file && strcmp(file->filename, tk[1])) file = file->next; | |
| 210 if (!file) { | |
| 211 file = xzalloc(sizeof(struct logfile)); | |
| 212 file->filename = xstrdup(tk[1]); | |
| 213 file->next = TT.lfiles; | |
| 214 TT.lfiles = file; | |
| 215 } | |
| 216 if (resolve_config(file, confline) == -1) { | |
| 960 | 217 error_msg("error in '%s' at line %d", TT.config_file, lineno); |
| 218 return -1; | |
| 219 } | |
| 220 } | |
| 221 free(confline); | |
| 222 } | |
| 223 /* | |
| 224 * Can't open config file or support is not enabled | |
| 225 * adding default logfile to the head of list. | |
| 226 */ | |
| 227 if (!fp){ | |
| 1021 | 228 file = xzalloc(sizeof(struct logfile)); |
| 1028 | 229 file->filename = xstrdup((toys.optflags & FLAG_O) ? |
| 230 TT.logfile : "/var/log/messages"); //DEFLOGFILE | |
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231 file->next = TT.lfiles; |
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232 TT.lfiles = file; |
| 1025 | 233 } else fclose(fp); |
| 960 | 234 return 0; |
| 235 } | |
| 236 | |
| 237 // open every log file in list. | |
| 238 static void open_logfiles(void) | |
| 239 { | |
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240 struct logfile *tfd; |
| 1024 | 241 |
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242 for (tfd = TT.lfiles; tfd; tfd = tfd->next) { |
| 1024 | 243 char *p, *tmpfile; |
| 244 long port = 514; | |
| 245 | |
| 1028 | 246 if (*tfd->filename == '@') { // network |
| 1024 | 247 struct addrinfo *info, rp; |
| 248 | |
| 249 tmpfile = xstrdup(tfd->filename + 1); | |
| 250 if ((p = strchr(tmpfile, ':'))) { | |
| 251 char *endptr; | |
| 960 | 252 |
| 253 *p = '\0'; | |
| 1024 | 254 port = strtol(++p, &endptr, 10); |
| 255 if (*endptr || endptr == p || port < 0 || port > 65535) | |
| 256 error_exit("bad port in %s", tfd->filename); | |
| 960 | 257 } |
| 1024 | 258 memset(&rp, 0, sizeof(rp)); |
| 259 rp.ai_family = AF_INET; | |
| 260 rp.ai_socktype = SOCK_DGRAM; | |
| 261 rp.ai_protocol = IPPROTO_UDP; | |
| 262 | |
| 263 if (getaddrinfo(tmpfile, NULL, &rp, &info) || !info) | |
| 264 perror_exit("BAD ADDRESS: can't find : %s ", tmpfile); | |
| 265 ((struct sockaddr_in*)info->ai_addr)->sin_port = htons(port); | |
| 266 memcpy(&tfd->saddr, info->ai_addr, info->ai_addrlen); | |
| 267 freeaddrinfo(info); | |
| 268 | |
| 269 tfd->logfd = xsocket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); | |
| 960 | 270 free(tmpfile); |
| 271 } else tfd->logfd = open(tfd->filename, O_CREAT | O_WRONLY | O_APPEND, 0666); | |
| 272 if (tfd->logfd < 0) { | |
| 273 tfd->filename = "/dev/console"; | |
| 274 tfd->logfd = open(tfd->filename, O_APPEND); | |
| 275 } | |
| 276 } | |
| 277 } | |
| 278 | |
| 279 //write to file with rotation | |
| 1021 | 280 static int write_rotate(struct logfile *tf, int len) |
| 960 | 281 { |
| 282 int size, isreg; | |
| 283 struct stat statf; | |
| 284 isreg = (!fstat(tf->logfd, &statf) && S_ISREG(statf.st_mode)); | |
| 285 size = statf.st_size; | |
| 286 | |
| 1024 | 287 if ((toys.optflags & FLAG_s) || (toys.optflags & FLAG_b)) { |
| 960 | 288 if (TT.rot_size && isreg && (size + len) > (TT.rot_size*1024)) { |
| 289 if (TT.rot_count) { /* always 0..99 */ | |
| 290 int i = strlen(tf->filename) + 3 + 1; | |
| 291 char old_file[i]; | |
| 292 char new_file[i]; | |
| 293 i = TT.rot_count - 1; | |
| 294 while (1) { | |
| 295 sprintf(new_file, "%s.%d", tf->filename, i); | |
| 296 if (!i) break; | |
| 297 sprintf(old_file, "%s.%d", tf->filename, --i); | |
| 298 rename(old_file, new_file); | |
| 299 } | |
| 300 rename(tf->filename, new_file); | |
| 301 unlink(tf->filename); | |
| 302 close(tf->logfd); | |
| 303 tf->logfd = open(tf->filename, O_CREAT | O_WRONLY | O_APPEND, 0666); | |
| 304 } | |
| 305 ftruncate(tf->logfd, 0); | |
| 306 } | |
| 307 } | |
| 308 return write(tf->logfd, toybuf, len); | |
| 309 } | |
| 310 | |
| 311 //Parse messege and write to file. | |
| 312 static void logmsg(char *msg, int len) | |
| 313 { | |
| 314 time_t now; | |
| 315 char *p, *ts, *lvlstr, *facstr; | |
| 316 struct utsname uts; | |
| 317 int pri = 0; | |
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318 struct logfile *tf = TT.lfiles; |
| 960 | 319 |
| 320 char *omsg = msg; | |
| 321 int olen = len, fac, lvl; | |
| 322 | |
| 323 if (*msg == '<') { // Extract the priority no. | |
| 324 pri = (int) strtoul(msg + 1, &p, 10); | |
| 325 if (*p == '>') msg = p + 1; | |
| 326 } | |
| 327 /* Jan 18 00:11:22 msg... | |
| 328 * 01234567890123456 | |
| 329 */ | |
| 330 if (len < 16 || msg[3] != ' ' || msg[6] != ' ' || msg[9] != ':' | |
| 331 || msg[12] != ':' || msg[15] != ' ') { | |
| 332 time(&now); | |
| 333 ts = ctime(&now) + 4; /* skip day of week */ | |
| 334 } else { | |
| 335 now = 0; | |
| 336 ts = msg; | |
| 337 msg += 16; | |
| 338 } | |
| 339 ts[15] = '\0'; | |
| 340 fac = LOG_FAC(pri); | |
| 341 lvl = LOG_PRI(pri); | |
| 342 | |
| 1024 | 343 if (toys.optflags & FLAG_K) len = sprintf(toybuf, "<%d> %s\n", pri, msg); |
| 344 else { | |
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345 char facbuf[12], pribuf[12]; |
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346 |
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347 facstr = dec(pri & LOG_FACMASK, facilitynames, facbuf); |
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348 lvlstr = dec(LOG_PRI(pri), prioritynames, pribuf); |
| 960 | 349 |
| 1024 | 350 p = "local"; |
| 351 if (!uname(&uts)) p = uts.nodename; | |
| 352 if (toys.optflags & FLAG_S) len = sprintf(toybuf, "%s %s\n", ts, msg); | |
| 353 else len = sprintf(toybuf, "%s %s %s.%s %s\n", ts, p, facstr, lvlstr, msg); | |
| 354 } | |
| 960 | 355 if (lvl >= TT.log_prio) return; |
| 356 | |
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357 for (; tf; tf = tf->next) { |
| 960 | 358 if (tf->logfd > 0) { |
| 1028 | 359 if (!((tf->facility[lvl] & (1 << fac)) || (tf->level[fac] & (1<<lvl)))) { |
| 360 int wlen, isNetwork = *tf->filename == '@'; | |
| 361 if (isNetwork) | |
| 960 | 362 wlen = sendto(tf->logfd, omsg, olen, 0, (struct sockaddr*)&tf->saddr, sizeof(tf->saddr)); |
| 363 else wlen = write_rotate(tf, len); | |
| 1028 | 364 if (wlen < 0) perror_msg("write failed file : %s ", tf->filename + isNetwork); |
| 960 | 365 } |
| 366 } | |
| 367 } | |
| 368 } | |
| 369 | |
| 370 /* | |
| 371 * closes all read and write fds | |
| 372 * and frees all nodes and lists | |
| 373 */ | |
| 374 static void cleanup(void) | |
| 375 { | |
| 376 while (TT.lsocks) { | |
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377 struct unsocks *fnode = TT.lsocks; |
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378 |
| 1028 | 379 if (fnode->sd >= 0) { |
| 380 close(fnode->sd); | |
| 381 unlink(fnode->path); | |
| 382 } | |
| 960 | 383 TT.lsocks = fnode->next; |
| 384 free(fnode); | |
| 385 } | |
| 386 | |
| 387 while (TT.lfiles) { | |
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388 struct logfile *fnode = TT.lfiles; |
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389 |
| 1028 | 390 free(fnode->filename); |
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391 if (fnode->logfd >= 0) close(fnode->logfd); |
| 960 | 392 TT.lfiles = fnode->next; |
| 393 free(fnode); | |
| 394 } | |
| 395 } | |
| 396 | |
| 397 static void signal_handler(int sig) | |
| 398 { | |
| 399 unsigned char ch = sig; | |
| 1021 | 400 if (write(TT.sigfd[1], &ch, 1) != 1) error_msg("can't send signal"); |
| 960 | 401 } |
| 402 | |
| 403 void syslogd_main(void) | |
| 404 { | |
| 1021 | 405 struct unsocks *tsd; |
| 1028 | 406 int nfds, retval, last_len=0; |
| 960 | 407 struct timeval tv; |
| 1028 | 408 fd_set rfds; // fds for reading |
| 960 | 409 char *temp, *buffer = (toybuf +2048), *last_buf = (toybuf + 3072); //these two buffs are of 1K each |
| 410 | |
| 1024 | 411 if ((toys.optflags & FLAG_p) && (strlen(TT.unix_socket) > 108)) |
| 960 | 412 error_exit("Socket path should not be more than 108"); |
| 413 | |
| 1024 | 414 TT.config_file = (toys.optflags & FLAG_f) ? |
| 415 TT.config_file : "/etc/syslog.conf"; //DEFCONFFILE | |
| 960 | 416 init_jumpin: |
| 1021 | 417 tsd = xzalloc(sizeof(struct unsocks)); |
| 960 | 418 |
| 1024 | 419 tsd->path = (toys.optflags & FLAG_p) ? TT.unix_socket : "/dev/log"; // DEFLOGSOCK |
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420 TT.lsocks = tsd; |
| 960 | 421 |
| 1024 | 422 if (toys.optflags & FLAG_a) { |
| 960 | 423 for (temp = strtok(TT.socket, ":"); temp; temp = strtok(NULL, ":")) { |
| 424 if (strlen(temp) > 107) temp[108] = '\0'; | |
| 1021 | 425 tsd = xzalloc(sizeof(struct unsocks)); |
| 960 | 426 tsd->path = temp; |
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427 tsd->next = TT.lsocks; |
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428 TT.lsocks = tsd; |
| 960 | 429 } |
| 430 } | |
| 1028 | 431 /* |
| 432 * initializes unsock_t structure | |
| 433 * and opens socket for reading | |
| 434 * and adds to global lsock list. | |
| 435 */ | |
| 436 nfds = 0; | |
| 437 for (tsd = TT.lsocks; tsd; tsd = tsd->next) { | |
| 438 tsd->sdu.sun_family = AF_UNIX; | |
| 439 strcpy(tsd->sdu.sun_path, tsd->path); | |
| 440 tsd->sd = socket(AF_UNIX, SOCK_DGRAM, 0); | |
| 441 if (tsd->sd < 0) { | |
| 442 perror_msg("OPEN SOCKS : failed"); | |
| 443 continue; | |
| 444 } | |
| 445 unlink(tsd->sdu.sun_path); | |
| 446 if (bind(tsd->sd, (struct sockaddr *) &tsd->sdu, sizeof(tsd->sdu))) { | |
| 447 perror_msg("BIND SOCKS : failed sock : %s", tsd->sdu.sun_path); | |
| 448 close(tsd->sd); | |
| 449 continue; | |
| 450 } | |
| 451 chmod(tsd->path, 0777); | |
| 452 nfds++; | |
| 453 } | |
| 454 if (!nfds) { | |
| 960 | 455 error_msg("Can't open single socket for listenning."); |
| 456 goto clean_and_exit; | |
| 457 } | |
| 1021 | 458 |
| 459 // Setup signals | |
| 460 if (pipe(TT.sigfd) < 0) error_exit("pipe failed\n"); | |
| 461 | |
| 462 fcntl(TT.sigfd[1] , F_SETFD, FD_CLOEXEC); | |
| 463 fcntl(TT.sigfd[0] , F_SETFD, FD_CLOEXEC); | |
| 464 int flags = fcntl(TT.sigfd[1], F_GETFL); | |
| 465 fcntl(TT.sigfd[1], F_SETFL, flags | O_NONBLOCK); | |
| 466 signal(SIGHUP, signal_handler); | |
| 467 signal(SIGTERM, signal_handler); | |
| 468 signal(SIGINT, signal_handler); | |
| 469 signal(SIGQUIT, signal_handler); | |
| 470 | |
| 960 | 471 if (parse_config_file() == -1) goto clean_and_exit; |
| 472 open_logfiles(); | |
| 1024 | 473 if (!(toys.optflags & FLAG_n)) { |
| 1028 | 474 daemonize(); |
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475 //don't daemonize again if SIGHUP received. |
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476 toys.optflags |= FLAG_n; |
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477 } |
| 1028 | 478 xpidfile("syslogd"); |
| 960 | 479 |
| 480 logmsg("<46>Toybox: syslogd started", 27); //27 : the length of message | |
| 481 for (;;) { | |
| 1028 | 482 // Add opened socks to rfds for select() |
| 483 FD_ZERO(&rfds); | |
| 484 for (tsd = TT.lsocks; tsd; tsd = tsd->next) FD_SET(tsd->sd, &rfds); | |
| 485 FD_SET(TT.sigfd[0], &rfds); | |
| 960 | 486 tv.tv_usec = 0; |
| 487 tv.tv_sec = TT.interval*60; | |
| 488 | |
| 1028 | 489 retval = select(TT.sigfd[0] + 1, &rfds, NULL, NULL, (TT.interval)?&tv:NULL); |
| 490 if (retval < 0) { | |
| 491 if (errno != EINTR) perror_msg("Error in select "); | |
| 960 | 492 } |
| 1028 | 493 else if (!retval) logmsg("<46>-- MARK --", 14); |
| 494 else if (FD_ISSET(TT.sigfd[0], &rfds)) { /* May be a signal */ | |
| 960 | 495 unsigned char sig; |
| 496 | |
| 1021 | 497 if (read(TT.sigfd[0], &sig, 1) != 1) { |
| 960 | 498 error_msg("signal read failed.\n"); |
| 499 continue; | |
| 500 } | |
| 501 switch(sig) { | |
| 502 case SIGTERM: /* FALLTHROUGH */ | |
| 503 case SIGINT: /* FALLTHROUGH */ | |
| 504 case SIGQUIT: | |
| 505 logmsg("<46>syslogd exiting", 19); | |
| 506 if (CFG_TOYBOX_FREE ) cleanup(); | |
| 507 signal(sig, SIG_DFL); | |
| 508 sigset_t ss; | |
| 509 sigemptyset(&ss); | |
| 510 sigaddset(&ss, sig); | |
| 511 sigprocmask(SIG_UNBLOCK, &ss, NULL); | |
| 512 raise(sig); | |
| 513 _exit(1); /* Should not reach it */ | |
| 514 break; | |
| 515 case SIGHUP: | |
| 516 logmsg("<46>syslogd exiting", 19); | |
| 517 cleanup(); //cleanup is done, as we restart syslog. | |
| 518 goto init_jumpin; | |
| 519 default: break; | |
| 520 } | |
| 1028 | 521 } else { /* Some activity on listen sockets. */ |
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522 for (tsd = TT.lsocks; tsd; tsd = tsd->next) { |
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523 int sd = tsd->sd; |
| 1028 | 524 if (FD_ISSET(sd, &rfds)) { |
| 960 | 525 int len = read(sd, buffer, 1023); //buffer is of 1K, hence readingonly 1023 bytes, 1 for NUL |
| 526 if (len > 0) { | |
| 527 buffer[len] = '\0'; | |
| 1024 | 528 if((toys.optflags & FLAG_D) && (len == last_len)) |
| 960 | 529 if (!memcmp(last_buf, buffer, len)) break; |
| 530 | |
| 531 memcpy(last_buf, buffer, len); | |
| 532 last_len = len; | |
| 533 logmsg(buffer, len); | |
| 534 } | |
| 535 break; | |
| 536 } | |
| 537 } | |
| 538 } | |
| 539 } | |
| 540 clean_and_exit: | |
| 541 logmsg("<46>syslogd exiting", 19); | |
| 542 if (CFG_TOYBOX_FREE ) cleanup(); | |
| 543 } |