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 #define IOV_MAX 16 /* minimum required */
51 #include <sys/syscall.h>
52 #define getrusage(a,b) syscall(SYS_GETRUSAGE, a, b)
56 * This is part of the STATS replies. There is no offical numeric for this
57 * since this isnt an official command, in much the same way as HASH isnt.
58 * It is also possible that some systems wont support this call or have
59 * different field names for "struct rusage".
62 int os_get_rusage(struct Client *cptr, int uptime, EnumFn enumerator)
77 hzz = sysconf(_SC_CLK_TCK);
82 assert(0 != enumerator);
83 if (getrusage(RUSAGE_SELF, &rus) == -1)
86 secs = rus.ru_utime.tv_sec + rus.ru_stime.tv_sec;
90 sprintf(buf, "CPU Secs %ld:%ld User %ld:%ld System %ld:%ld",
92 rus.ru_utime.tv_sec / 60, rus.ru_utime.tv_sec % 60,
93 rus.ru_stime.tv_sec / 60, rus.ru_stime.tv_sec % 60);
94 (*enumerator)(cptr, buf);
96 sprintf(buf, "RSS %ld ShMem %ld Data %ld Stack %ld",
98 rus.ru_ixrss / (uptime * hzz), rus.ru_idrss / (uptime * hzz),
99 rus.ru_isrss / (uptime * hzz));
100 (*enumerator)(cptr, buf);
102 sprintf(buf, "Swaps %ld Reclaims %ld Faults %ld",
103 rus.ru_nswap, rus.ru_minflt, rus.ru_majflt);
104 (*enumerator)(cptr, buf);
106 sprintf(buf, "Block in %ld out %ld", rus.ru_inblock, rus.ru_oublock);
107 (*enumerator)(cptr, buf);
109 sprintf(buf, "Msg Rcv %ld Send %ld", rus.ru_msgrcv, rus.ru_msgsnd);
110 (*enumerator)(cptr, buf);
112 sprintf(buf, "Signals %ld Context Vol. %ld Invol %ld",
113 rus.ru_nsignals, rus.ru_nvcsw, rus.ru_nivcsw);
114 (*enumerator)(cptr, buf);
116 #else /* HAVE_GETRUSAGE */
120 int hzz = 1, ticpermin;
121 int umin, smin, usec, ssec;
123 assert(0 != enumerator);
125 hzz = sysconf(_SC_CLK_TCK);
127 ticpermin = hzz * 60;
129 umin = tmsbuf.tms_utime / ticpermin;
130 usec = (tmsbuf.tms_utime % ticpermin) / (float)hzz;
131 smin = tmsbuf.tms_stime / ticpermin;
132 ssec = (tmsbuf.tms_stime % ticpermin) / (float)hzz;
134 mins = (secs / 60) + umin + smin;
137 if (times(&tmsbuf) == -1)
139 secs = tmsbuf.tms_utime + tmsbuf.tms_stime;
141 sprintf(buf, "CPU Secs %d:%d User %d:%d System %d:%d",
142 mins, secs, umin, usec, smin, ssec);
143 (*enumerator)(cptr, buf);
144 #endif /* HAVE_TIMES */
145 #endif /* HAVE_GETRUSAGE */
149 int os_get_sockerr(int fd)
152 #if defined(SO_ERROR)
153 unsigned int len = sizeof(err);
154 getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &len);
162 * Set the client connection into non-blocking mode. If your
163 * system doesn't support this, you can make this a dummy
164 * function (and get all the old problems that plagued the
165 * blocking version of IRC--not a problem if you are a
166 * lightly loaded node...)
168 int os_set_nonblocking(int fd)
176 * NOTE: consult ALL your relevant manual pages *BEFORE* changing
177 * these ioctl's. There are quite a few variations on them,
178 * as can be seen by the PCS one. They are *NOT* all the same.
179 * Heed this well. - Avalon.
188 /* This portion of code might also apply to NeXT. -LynX */
191 if (ioctl(fd, FIONBIO, &res) == -1)
194 if ((res = fcntl(fd, F_GETFL, 0)) == -1)
196 else if (fcntl(fd, F_SETFL, res | nonb) == -1)
206 int os_set_reuseaddr(int fd)
208 unsigned int opt = 1;
209 return (0 == setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
210 (const char*) &opt, sizeof(opt)));
213 int os_set_sockbufs(int fd, unsigned int size)
215 unsigned int opt = size;
216 return (0 == setsockopt(fd, SOL_SOCKET, SO_RCVBUF,
217 (const char*) &opt, sizeof(opt)) &&
218 0 == setsockopt(fd, SOL_SOCKET, SO_SNDBUF,
219 (const char*) &opt, sizeof(opt)));
222 int os_disable_options(int fd)
224 #if defined(IP_OPTIONS) && defined(IPPROTO_IP)
225 return (0 == setsockopt(fd, IPPROTO_IP, IP_OPTIONS, NULL, 0));
232 * Try and find the correct name to use with getrlimit() for setting the max.
233 * number of files allowed to be open by this process.
236 #define RLIMIT_FD_MAX RLIMIT_FDMAX
239 #define RLIMIT_FD_MAX RLIMIT_NOFILE
241 #ifdef RLIMIT_OPEN_MAX
242 #define RLIMIT_FD_MAX RLIMIT_OPEN_MAX
249 int os_set_fdlimit(unsigned int max_descriptors)
251 #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_FD_MAX)
254 if (!getrlimit(RLIMIT_FD_MAX, &limit)) {
255 if (limit.rlim_max < MAXCONNECTIONS)
256 return limit.rlim_max;
257 limit.rlim_cur = limit.rlim_max; /* make soft limit the max */
258 return setrlimit(RLIMIT_FD_MAX, &limit);
260 #endif /* defined(HAVE_SETRLIMIT) && defined(RLIMIT_FD_MAX) */
264 IOResult os_recv_nonb(int fd, char* buf, unsigned int length,
265 unsigned int* count_out)
269 assert(0 != count_out);
273 if (0 < (res = recv(fd, buf, length, 0))) {
274 *count_out = (unsigned) res;
278 if (EWOULDBLOCK == errno || EAGAIN == errno)
284 * 0 == client closed the connection
290 IOResult os_recvfrom_nonb(int fd, char* buf, unsigned int length,
291 unsigned int* length_out, struct sockaddr_in* sin_out)
294 unsigned int len = sizeof(struct sockaddr_in);
296 assert(0 != length_out);
297 assert(0 != sin_out);
300 res = recvfrom(fd, buf, length, 0, (struct sockaddr*) sin_out, &len);
302 if (EWOULDBLOCK == errno || ENOMEM == errno)
310 IOResult os_send_nonb(int fd, const char* buf, unsigned int length,
311 unsigned int* count_out)
315 assert(0 != count_out);
319 if (-1 < (res = send(fd, buf, length, 0))) {
320 *count_out = (unsigned) res;
323 else if (EWOULDBLOCK == errno || EAGAIN == errno ||
324 ENOMEM == errno || ENOBUFS == errno)
329 IOResult os_sendv_nonb(int fd, struct MsgQ* buf, unsigned int* count_in,
330 unsigned int* count_out)
334 struct iovec iov[IOV_MAX];
337 assert(0 != count_in);
338 assert(0 != count_out);
344 count = msgq_mapiov(buf, iov, IOV_MAX, count_in);
346 if (-1 < (res = writev(fd, iov, count))) {
347 *count_out = (unsigned) res;
350 else if (EWOULDBLOCK == errno || EAGAIN == errno ||
351 ENOMEM == errno || ENOBUFS == errno)
357 int os_connect_nonb(int fd, const struct sockaddr_in* sin)
359 if (connect(fd, (struct sockaddr*) sin, sizeof(struct sockaddr_in))) {
360 if (errno != EINPROGRESS)
366 int os_get_sockname(int fd, struct sockaddr_in* sin_out)
368 unsigned int len = sizeof(struct sockaddr_in);
369 assert(0 != sin_out);
370 return (0 == getsockname(fd, (struct sockaddr*) sin_out, &len));
373 int os_get_peername(int fd, struct sockaddr_in* sin_out)
375 unsigned int len = sizeof(struct sockaddr_in);
376 assert(0 != sin_out);
377 return (0 == getpeername(fd, (struct sockaddr*) sin_out, &len));
380 int os_set_listen(int fd, int backlog)
382 return (0 == listen(fd, backlog));