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 /* make limits.h #define IOV_MAX */
26 #include "ircd_osdep.h"
30 #include <sys/types.h>
32 #include <sys/resource.h>
36 #include <netinet/in.h>
39 #include <sys/ioctl.h>
40 #include <sys/socket.h>
45 #define IOV_MAX 16 /* minimum required */
49 #include <sys/syscall.h>
50 #define getrusage(a,b) syscall(SYS_GETRUSAGE, a, b)
54 * This is part of the STATS replies. There is no offical numeric for this
55 * since this isnt an official command, in much the same way as HASH isnt.
56 * It is also possible that some systems wont support this call or have
57 * different field names for "struct rusage".
60 int os_get_rusage(struct Client *cptr, int uptime, EnumFn enumerator)
75 hzz = sysconf(_SC_CLK_TCK);
80 assert(0 != enumerator);
81 if (getrusage(RUSAGE_SELF, &rus) == -1)
84 secs = rus.ru_utime.tv_sec + rus.ru_stime.tv_sec;
88 sprintf(buf, "CPU Secs %ld:%ld User %ld:%ld System %ld:%ld",
90 rus.ru_utime.tv_sec / 60, rus.ru_utime.tv_sec % 60,
91 rus.ru_stime.tv_sec / 60, rus.ru_stime.tv_sec % 60);
92 (*enumerator)(cptr, buf);
94 sprintf(buf, "RSS %ld ShMem %ld Data %ld Stack %ld",
96 rus.ru_ixrss / (uptime * hzz), rus.ru_idrss / (uptime * hzz),
97 rus.ru_isrss / (uptime * hzz));
98 (*enumerator)(cptr, buf);
100 sprintf(buf, "Swaps %ld Reclaims %ld Faults %ld",
101 rus.ru_nswap, rus.ru_minflt, rus.ru_majflt);
102 (*enumerator)(cptr, buf);
104 sprintf(buf, "Block in %ld out %ld", rus.ru_inblock, rus.ru_oublock);
105 (*enumerator)(cptr, buf);
107 sprintf(buf, "Msg Rcv %ld Send %ld", rus.ru_msgrcv, rus.ru_msgsnd);
108 (*enumerator)(cptr, buf);
110 sprintf(buf, "Signals %ld Context Vol. %ld Invol %ld",
111 rus.ru_nsignals, rus.ru_nvcsw, rus.ru_nivcsw);
112 (*enumerator)(cptr, buf);
114 #else /* HAVE_GETRUSAGE */
118 int hzz = 1, ticpermin;
119 int umin, smin, usec, ssec;
121 assert(0 != enumerator);
123 hzz = sysconf(_SC_CLK_TCK);
125 ticpermin = hzz * 60;
127 umin = tmsbuf.tms_utime / ticpermin;
128 usec = (tmsbuf.tms_utime % ticpermin) / (float)hzz;
129 smin = tmsbuf.tms_stime / ticpermin;
130 ssec = (tmsbuf.tms_stime % ticpermin) / (float)hzz;
132 mins = (secs / 60) + umin + smin;
135 if (times(&tmsbuf) == -1)
137 secs = tmsbuf.tms_utime + tmsbuf.tms_stime;
139 sprintf(buf, "CPU Secs %d:%d User %d:%d System %d:%d",
140 mins, secs, umin, usec, smin, ssec);
141 (*enumerator)(cptr, buf);
142 #endif /* HAVE_TIMES */
143 #endif /* HAVE_GETRUSAGE */
147 int os_get_sockerr(int fd)
150 #if defined(SO_ERROR)
151 unsigned int len = sizeof(err);
152 getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &len);
160 * Set the client connection into non-blocking mode. If your
161 * system doesn't support this, you can make this a dummy
162 * function (and get all the old problems that plagued the
163 * blocking version of IRC--not a problem if you are a
164 * lightly loaded node...)
166 int os_set_nonblocking(int fd)
174 * NOTE: consult ALL your relevant manual pages *BEFORE* changing
175 * these ioctl's. There are quite a few variations on them,
176 * as can be seen by the PCS one. They are *NOT* all the same.
177 * Heed this well. - Avalon.
186 /* This portion of code might also apply to NeXT. -LynX */
189 if (ioctl(fd, FIONBIO, &res) == -1)
192 if ((res = fcntl(fd, F_GETFL, 0)) == -1)
194 else if (fcntl(fd, F_SETFL, res | nonb) == -1)
204 int os_set_reuseaddr(int fd)
206 unsigned int opt = 1;
207 return (0 == setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
208 (const char*) &opt, sizeof(opt)));
211 int os_set_sockbufs(int fd, unsigned int size)
213 unsigned int opt = size;
214 return (0 == setsockopt(fd, SOL_SOCKET, SO_RCVBUF,
215 (const char*) &opt, sizeof(opt)) &&
216 0 == setsockopt(fd, SOL_SOCKET, SO_SNDBUF,
217 (const char*) &opt, sizeof(opt)));
220 int os_set_tos(int fd,int tos)
222 unsigned int opt = tos;
223 return (0 == setsockopt(fd, IPPROTO_IP, IP_TOS, &opt, sizeof(opt)));
226 int os_disable_options(int fd)
228 #if defined(IP_OPTIONS) && defined(IPPROTO_IP)
229 return (0 == setsockopt(fd, IPPROTO_IP, IP_OPTIONS, NULL, 0));
236 * Try and find the correct name to use with getrlimit() for setting the max.
237 * number of files allowed to be open by this process.
240 #define RLIMIT_FD_MAX RLIMIT_FDMAX
243 #define RLIMIT_FD_MAX RLIMIT_NOFILE
245 #ifdef RLIMIT_OPEN_MAX
246 #define RLIMIT_FD_MAX RLIMIT_OPEN_MAX
253 int os_set_fdlimit(unsigned int max_descriptors)
255 #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_FD_MAX)
258 if (!getrlimit(RLIMIT_FD_MAX, &limit)) {
259 if (limit.rlim_max < MAXCONNECTIONS)
260 return limit.rlim_max;
261 limit.rlim_cur = limit.rlim_max; /* make soft limit the max */
262 return setrlimit(RLIMIT_FD_MAX, &limit);
264 #endif /* defined(HAVE_SETRLIMIT) && defined(RLIMIT_FD_MAX) */
268 IOResult os_recv_nonb(int fd, char* buf, unsigned int length,
269 unsigned int* count_out)
273 assert(0 != count_out);
277 if (0 < (res = recv(fd, buf, length, 0))) {
278 *count_out = (unsigned) res;
282 if (EWOULDBLOCK == errno || EAGAIN == errno)
288 * 0 == client closed the connection
294 IOResult os_recvfrom_nonb(int fd, char* buf, unsigned int length,
295 unsigned int* length_out, struct sockaddr_in* sin_out)
298 unsigned int len = sizeof(struct sockaddr_in);
300 assert(0 != length_out);
301 assert(0 != sin_out);
305 res = recvfrom(fd, buf, length, 0, (struct sockaddr*) sin_out, &len);
307 if (EWOULDBLOCK == errno || ENOMEM == errno)
315 IOResult os_send_nonb(int fd, const char* buf, unsigned int length,
316 unsigned int* count_out)
320 assert(0 != count_out);
324 if (-1 < (res = send(fd, buf, length, 0))) {
325 *count_out = (unsigned) res;
328 else if (EWOULDBLOCK == errno || EAGAIN == errno ||
329 ENOMEM == errno || ENOBUFS == errno)
334 IOResult os_sendv_nonb(int fd, struct MsgQ* buf, unsigned int* count_in,
335 unsigned int* count_out)
339 struct iovec iov[IOV_MAX];
342 assert(0 != count_in);
343 assert(0 != count_out);
349 count = msgq_mapiov(buf, iov, IOV_MAX, count_in);
351 if (-1 < (res = writev(fd, iov, count))) {
352 *count_out = (unsigned) res;
355 else if (EWOULDBLOCK == errno || EAGAIN == errno ||
356 ENOMEM == errno || ENOBUFS == errno)
362 int os_connect_nonb(int fd, const struct sockaddr_in* sin)
364 if (connect(fd, (struct sockaddr*) sin, sizeof(struct sockaddr_in))) {
365 if (errno != EINPROGRESS)
371 int os_get_sockname(int fd, struct sockaddr_in* sin_out)
373 unsigned int len = sizeof(struct sockaddr_in);
374 assert(0 != sin_out);
375 return (0 == getsockname(fd, (struct sockaddr*) sin_out, &len));
378 int os_get_peername(int fd, struct sockaddr_in* sin_out)
380 unsigned int len = sizeof(struct sockaddr_in);
381 assert(0 != sin_out);
382 return (0 == getpeername(fd, (struct sockaddr*) sin_out, &len));
385 int os_set_listen(int fd, int backlog)
387 return (0 == listen(fd, backlog));