2 * IRC - Internet Relay Chat, ircd/os_generic.c
3 * Copyright (C) 1999 Thomas Helvey
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 1, or (at your option)
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #define _XOPEN_SOURCE 500 /* make limits.h #define IOV_MAX */
26 #include "ircd_osdep.h"
29 /* Include file dependency notes:
30 * FreeBSD requires struct timeval from sys/time.h before struct
31 * rusage in sys/resource.h.
32 * Solaris requires sys/time.h before struct rusage (indirectly) in
41 #include <sys/ioctl.h>
42 #include <sys/types.h>
44 #include <netinet/in.h>
45 #include <sys/resource.h>
46 #include <sys/socket.h>
50 #include <sys/param.h>
58 #define IOV_MAX 16 /* minimum required */
62 #include <sys/syscall.h>
63 #define getrusage(a,b) syscall(SYS_GETRUSAGE, a, b)
67 * This is part of the STATS replies. There is no offical numeric for this
68 * since this isnt an official command, in much the same way as HASH isnt.
69 * It is also possible that some systems wont support this call or have
70 * different field names for "struct rusage".
73 int os_get_rusage(struct Client *cptr, int uptime, EnumFn enumerator)
88 hzz = sysconf(_SC_CLK_TCK);
93 assert(0 != enumerator);
94 if (getrusage(RUSAGE_SELF, &rus) == -1)
97 secs = rus.ru_utime.tv_sec + rus.ru_stime.tv_sec;
101 sprintf(buf, "CPU Secs %ld:%ld User %ld:%ld System %ld:%ld",
102 (long)(secs / 60), (long)(secs % 60),
103 rus.ru_utime.tv_sec / 60, rus.ru_utime.tv_sec % 60,
104 rus.ru_stime.tv_sec / 60, rus.ru_stime.tv_sec % 60);
105 (*enumerator)(cptr, buf);
107 sprintf(buf, "RSS %ld ShMem %ld Data %ld Stack %ld",
109 rus.ru_ixrss / (uptime * hzz), rus.ru_idrss / (uptime * hzz),
110 rus.ru_isrss / (uptime * hzz));
111 (*enumerator)(cptr, buf);
113 sprintf(buf, "Swaps %ld Reclaims %ld Faults %ld",
114 rus.ru_nswap, rus.ru_minflt, rus.ru_majflt);
115 (*enumerator)(cptr, buf);
117 sprintf(buf, "Block in %ld out %ld", rus.ru_inblock, rus.ru_oublock);
118 (*enumerator)(cptr, buf);
120 sprintf(buf, "Msg Rcv %ld Send %ld", rus.ru_msgrcv, rus.ru_msgsnd);
121 (*enumerator)(cptr, buf);
123 sprintf(buf, "Signals %ld Context Vol. %ld Invol %ld",
124 rus.ru_nsignals, rus.ru_nvcsw, rus.ru_nivcsw);
125 (*enumerator)(cptr, buf);
127 #else /* HAVE_GETRUSAGE */
132 int hzz = 1, ticpermin;
133 int umin, smin, usec, ssec;
135 assert(0 != enumerator);
137 hzz = sysconf(_SC_CLK_TCK);
139 ticpermin = hzz * 60;
141 umin = tmsbuf.tms_utime / ticpermin;
142 usec = (tmsbuf.tms_utime % ticpermin) / (float)hzz;
143 smin = tmsbuf.tms_stime / ticpermin;
144 ssec = (tmsbuf.tms_stime % ticpermin) / (float)hzz;
146 mins = (secs / 60) + umin + smin;
149 if (times(&tmsbuf) == -1)
151 secs = tmsbuf.tms_utime + tmsbuf.tms_stime;
153 sprintf(buf, "CPU Secs %d:%d User %d:%d System %d:%d",
154 mins, secs, umin, usec, smin, ssec);
155 (*enumerator)(cptr, buf);
156 #endif /* HAVE_TIMES */
157 #endif /* HAVE_GETRUSAGE */
161 int os_get_sockerr(int fd)
164 #if defined(SO_ERROR)
165 unsigned int len = sizeof(err);
166 getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &len);
174 * Set the client connection into non-blocking mode. If your
175 * system doesn't support this, you can make this a dummy
176 * function (and get all the old problems that plagued the
177 * blocking version of IRC--not a problem if you are a
178 * lightly loaded node...)
180 int os_set_nonblocking(int fd)
188 * NOTE: consult ALL your relevant manual pages *BEFORE* changing
189 * these ioctl's. There are quite a few variations on them,
190 * as can be seen by the PCS one. They are *NOT* all the same.
191 * Heed this well. - Avalon.
200 /* This portion of code might also apply to NeXT. -LynX */
203 if (ioctl(fd, FIONBIO, &res) == -1)
206 if ((res = fcntl(fd, F_GETFL, 0)) == -1)
208 else if (fcntl(fd, F_SETFL, res | nonb) == -1)
218 int os_set_reuseaddr(int fd)
220 unsigned int opt = 1;
221 return (0 == setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
222 (const char*) &opt, sizeof(opt)));
225 int os_set_sockbufs(int fd, unsigned int ssize, unsigned int rsize)
227 unsigned int sopt = ssize;
228 unsigned int ropt = rsize;
229 return (0 == setsockopt(fd, SOL_SOCKET, SO_RCVBUF,
230 (const char*) &ropt, sizeof(ropt)) &&
231 0 == setsockopt(fd, SOL_SOCKET, SO_SNDBUF,
232 (const char*) &sopt, sizeof(sopt)));
235 int os_set_tos(int fd,int tos)
237 #if defined(IP_TOS) && defined(IPPROTO_IP)
238 unsigned int opt = tos;
239 return (0 == setsockopt(fd, IPPROTO_IP, IP_TOS, &opt, sizeof(opt)));
245 int os_disable_options(int fd)
247 #if defined(IP_OPTIONS) && defined(IPPROTO_IP)
248 return (0 == setsockopt(fd, IPPROTO_IP, IP_OPTIONS, NULL, 0));
255 * Try and find the correct name to use with getrlimit() for setting the max.
256 * number of files allowed to be open by this process.
259 #define RLIMIT_FD_MAX RLIMIT_FDMAX
262 #define RLIMIT_FD_MAX RLIMIT_NOFILE
264 #ifdef RLIMIT_OPEN_MAX
265 #define RLIMIT_FD_MAX RLIMIT_OPEN_MAX
272 int os_set_fdlimit(unsigned int max_descriptors)
274 #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_FD_MAX)
277 if (!getrlimit(RLIMIT_FD_MAX, &limit)) {
278 if (limit.rlim_max < MAXCONNECTIONS)
279 return limit.rlim_max;
280 limit.rlim_cur = limit.rlim_max; /* make soft limit the max */
281 return setrlimit(RLIMIT_FD_MAX, &limit);
283 #endif /* defined(HAVE_SETRLIMIT) && defined(RLIMIT_FD_MAX) */
288 * os_recv_nonb - non blocking read of a connection
290 * 1 if data was read or socket is blocked (recoverable error)
291 * count_out > 0 if data was read
293 * 0 if socket closed from other end
294 * -1 if an unrecoverable error occurred
296 IOResult os_recv_nonb(int fd, char* buf, unsigned int length,
297 unsigned int* count_out)
301 assert(0 != count_out);
305 if (0 < (res = recv(fd, buf, length, 0))) {
306 *count_out = (unsigned) res;
310 if (EWOULDBLOCK == errno || EAGAIN == errno
323 * 0 == client closed the connection
329 IOResult os_recvfrom_nonb(int fd, char* buf, unsigned int length,
330 unsigned int* length_out, struct sockaddr_in* sin_out)
333 unsigned int len = sizeof(struct sockaddr_in);
335 assert(0 != length_out);
336 assert(0 != sin_out);
340 res = recvfrom(fd, buf, length, 0, (struct sockaddr*) sin_out, &len);
342 if (EWOULDBLOCK == errno || ENOMEM == errno
358 * os_send_nonb - non blocking read of a connection
360 * 1 if data was written
361 * count_out contains amount written
363 * 0 if write call blocked, recoverable error
364 * -1 if an unrecoverable error occurred
366 IOResult os_send_nonb(int fd, const char* buf, unsigned int length,
367 unsigned int* count_out)
371 assert(0 != count_out);
375 if (-1 < (res = send(fd, buf, length, 0))) {
376 *count_out = (unsigned) res;
379 else if (EWOULDBLOCK == errno || EAGAIN == errno
391 IOResult os_sendv_nonb(int fd, struct MsgQ* buf, unsigned int* count_in,
392 unsigned int* count_out)
396 struct iovec iov[IOV_MAX];
399 assert(0 != count_in);
400 assert(0 != count_out);
406 count = msgq_mapiov(buf, iov, IOV_MAX, count_in);
408 if (-1 < (res = writev(fd, iov, count))) {
409 *count_out = (unsigned) res;
412 else if (EWOULDBLOCK == errno || EAGAIN == errno
425 IOResult os_connect_nonb(int fd, const struct sockaddr_in* sin)
427 if (connect(fd, (struct sockaddr*) sin, sizeof(struct sockaddr_in)))
428 return (errno == EINPROGRESS) ? IO_BLOCKED : IO_FAILURE;
432 int os_get_sockname(int fd, struct sockaddr_in* sin_out)
434 unsigned int len = sizeof(struct sockaddr_in);
435 assert(0 != sin_out);
436 return (0 == getsockname(fd, (struct sockaddr*) sin_out, &len));
439 int os_get_peername(int fd, struct sockaddr_in* sin_out)
441 unsigned int len = sizeof(struct sockaddr_in);
442 assert(0 != sin_out);
443 return (0 == getpeername(fd, (struct sockaddr*) sin_out, &len));
446 int os_set_listen(int fd, int backlog)
448 return (0 == listen(fd, backlog));