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.
22 #define _XOPEN_SOURCE /* make limits.h #define IOV_MAX */
24 #include "ircd_osdep.h"
32 #include <netinet/in.h>
35 #include <sys/ioctl.h>
36 #include <sys/types.h>
37 #include <sys/resource.h>
38 #include <sys/socket.h>
47 #include <sys/syscall.h>
48 #define getrusage(a,b) syscall(SYS_GETRUSAGE, a, b)
52 * This is part of the STATS replies. There is no offical numeric for this
53 * since this isnt an official command, in much the same way as HASH isnt.
54 * It is also possible that some systems wont support this call or have
55 * different field names for "struct rusage".
58 int os_get_rusage(struct Client *cptr, int uptime, EnumFn enumerator)
73 hzz = sysconf(_SC_CLK_TCK);
78 assert(0 != enumerator);
79 if (getrusage(RUSAGE_SELF, &rus) == -1)
82 secs = rus.ru_utime.tv_sec + rus.ru_stime.tv_sec;
86 sprintf(buf, "CPU Secs %ld:%ld User %ld:%ld System %ld:%ld",
88 rus.ru_utime.tv_sec / 60, rus.ru_utime.tv_sec % 60,
89 rus.ru_stime.tv_sec / 60, rus.ru_stime.tv_sec % 60);
90 (*enumerator)(cptr, buf);
92 sprintf(buf, "RSS %ld ShMem %ld Data %ld Stack %ld",
94 rus.ru_ixrss / (uptime * hzz), rus.ru_idrss / (uptime * hzz),
95 rus.ru_isrss / (uptime * hzz));
96 (*enumerator)(cptr, buf);
98 sprintf(buf, "Swaps %ld Reclaims %ld Faults %ld",
99 rus.ru_nswap, rus.ru_minflt, rus.ru_majflt);
100 (*enumerator)(cptr, buf);
102 sprintf(buf, "Block in %ld out %ld", rus.ru_inblock, rus.ru_oublock);
103 (*enumerator)(cptr, buf);
105 sprintf(buf, "Msg Rcv %ld Send %ld", rus.ru_msgrcv, rus.ru_msgsnd);
106 (*enumerator)(cptr, buf);
108 sprintf(buf, "Signals %ld Context Vol. %ld Invol %ld",
109 rus.ru_nsignals, rus.ru_nvcsw, rus.ru_nivcsw);
110 (*enumerator)(cptr, buf);
112 #else /* HAVE_GETRUSAGE */
116 int hzz = 1, ticpermin;
117 int umin, smin, usec, ssec;
119 assert(0 != enumerator);
121 hzz = sysconf(_SC_CLK_TCK);
123 ticpermin = hzz * 60;
125 umin = tmsbuf.tms_utime / ticpermin;
126 usec = (tmsbuf.tms_utime % ticpermin) / (float)hzz;
127 smin = tmsbuf.tms_stime / ticpermin;
128 ssec = (tmsbuf.tms_stime % ticpermin) / (float)hzz;
130 mins = (secs / 60) + umin + smin;
133 if (times(&tmsbuf) == -1)
135 secs = tmsbuf.tms_utime + tmsbuf.tms_stime;
137 sprintf(buf, "CPU Secs %d:%d User %d:%d System %d:%d",
138 mins, secs, umin, usec, smin, ssec);
139 (*enumerator)(cptr, buf);
140 #endif /* HAVE_TIMES */
141 #endif /* HAVE_GETRUSAGE */
145 int os_get_sockerr(int fd)
148 #if defined(SO_ERROR)
149 unsigned int len = sizeof(err);
150 getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &len);
158 * Set the client connection into non-blocking mode. If your
159 * system doesn't support this, you can make this a dummy
160 * function (and get all the old problems that plagued the
161 * blocking version of IRC--not a problem if you are a
162 * lightly loaded node...)
164 int os_set_nonblocking(int fd)
172 * NOTE: consult ALL your relevant manual pages *BEFORE* changing
173 * these ioctl's. There are quite a few variations on them,
174 * as can be seen by the PCS one. They are *NOT* all the same.
175 * Heed this well. - Avalon.
184 /* This portion of code might also apply to NeXT. -LynX */
187 if (ioctl(fd, FIONBIO, &res) == -1)
190 if ((res = fcntl(fd, F_GETFL, 0)) == -1)
192 else if (fcntl(fd, F_SETFL, res | nonb) == -1)
202 int os_set_reuseaddr(int fd)
204 unsigned int opt = 1;
205 return (0 == setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
206 (const char*) &opt, sizeof(opt)));
209 int os_set_sockbufs(int fd, unsigned int size)
211 unsigned int opt = size;
212 return (0 == setsockopt(fd, SOL_SOCKET, SO_RCVBUF,
213 (const char*) &opt, sizeof(opt)) &&
214 0 == setsockopt(fd, SOL_SOCKET, SO_SNDBUF,
215 (const char*) &opt, sizeof(opt)));
218 int os_disable_options(int fd)
220 #if defined(IP_OPTIONS) && defined(IPPROTO_IP)
221 return (0 == setsockopt(fd, IPPROTO_IP, IP_OPTIONS, NULL, 0));
228 * Try and find the correct name to use with getrlimit() for setting the max.
229 * number of files allowed to be open by this process.
232 #define RLIMIT_FD_MAX RLIMIT_FDMAX
235 #define RLIMIT_FD_MAX RLIMIT_NOFILE
237 #ifdef RLIMIT_OPEN_MAX
238 #define RLIMIT_FD_MAX RLIMIT_OPEN_MAX
245 int os_set_fdlimit(unsigned int max_descriptors)
247 #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_FD_MAX)
250 if (!getrlimit(RLIMIT_FD_MAX, &limit)) {
251 if (limit.rlim_max < MAXCONNECTIONS)
252 return limit.rlim_max;
253 limit.rlim_cur = limit.rlim_max; /* make soft limit the max */
254 return setrlimit(RLIMIT_FD_MAX, &limit);
256 #endif /* defined(HAVE_SETRLIMIT) && defined(RLIMIT_FD_MAX) */
260 IOResult os_recv_nonb(int fd, char* buf, unsigned int length,
261 unsigned int* count_out)
265 assert(0 != count_out);
269 if (0 < (res = recv(fd, buf, length, 0))) {
270 *count_out = (unsigned) res;
274 if (EWOULDBLOCK == errno || EAGAIN == errno)
280 * 0 == client closed the connection
286 IOResult os_recvfrom_nonb(int fd, char* buf, unsigned int length,
287 unsigned int* length_out, struct sockaddr_in* sin_out)
290 unsigned int len = sizeof(struct sockaddr_in);
292 assert(0 != length_out);
293 assert(0 != sin_out);
296 res = recvfrom(fd, buf, length, 0, (struct sockaddr*) sin_out, &len);
298 if (EWOULDBLOCK == errno || ENOMEM == errno)
306 IOResult os_send_nonb(int fd, const char* buf, unsigned int length,
307 unsigned int* count_out)
311 assert(0 != count_out);
315 if (-1 < (res = send(fd, buf, length, 0))) {
316 *count_out = (unsigned) res;
319 else if (EWOULDBLOCK == errno || EAGAIN == errno ||
320 ENOMEM == errno || ENOBUFS == errno)
325 IOResult os_sendv_nonb(int fd, struct MsgQ* buf, unsigned int* count_in,
326 unsigned int* count_out)
330 struct iovec iov[IOV_MAX];
333 assert(0 != count_in);
334 assert(0 != count_out);
340 count = msgq_mapiov(buf, iov, IOV_MAX, count_in);
342 if (-1 < (res = writev(fd, iov, count))) {
343 *count_out = (unsigned) res;
346 else if (EWOULDBLOCK == errno || EAGAIN == errno ||
347 ENOMEM == errno || ENOBUFS == errno)
353 int os_connect_nonb(int fd, const struct sockaddr_in* sin)
355 if (connect(fd, (struct sockaddr*) sin, sizeof(struct sockaddr_in))) {
356 if (errno != EINPROGRESS)
362 int os_get_sockname(int fd, struct sockaddr_in* sin_out)
364 unsigned int len = sizeof(struct sockaddr_in);
365 assert(0 != sin_out);
366 return (0 == getsockname(fd, (struct sockaddr*) sin_out, &len));
369 int os_get_peername(int fd, struct sockaddr_in* sin_out)
371 unsigned int len = sizeof(struct sockaddr_in);
372 assert(0 != sin_out);
373 return (0 == getpeername(fd, (struct sockaddr*) sin_out, &len));
376 int os_set_listen(int fd, int backlog)
378 return (0 == listen(fd, backlog));