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 #include "ircd_osdep.h"
26 #include <sys/types.h>
28 #include <sys/resource.h>
31 #include <netinet/in.h>
34 #include <sys/ioctl.h>
35 #include <sys/socket.h>
39 #include <sys/syscall.h>
40 #define getrusage(a,b) syscall(SYS_GETRUSAGE, a, b)
44 * This is part of the STATS replies. There is no offical numeric for this
45 * since this isnt an official command, in much the same way as HASH isnt.
46 * It is also possible that some systems wont support this call or have
47 * different field names for "struct rusage".
50 int os_get_rusage(struct Client *cptr, int uptime, EnumFn enumerator)
65 hzz = sysconf(_SC_CLK_TCK);
70 assert(0 != enumerator);
71 if (getrusage(RUSAGE_SELF, &rus) == -1)
74 secs = rus.ru_utime.tv_sec + rus.ru_stime.tv_sec;
78 sprintf(buf, "CPU Secs %ld:%ld User %ld:%ld System %ld:%ld",
80 rus.ru_utime.tv_sec / 60, rus.ru_utime.tv_sec % 60,
81 rus.ru_stime.tv_sec / 60, rus.ru_stime.tv_sec % 60);
82 (*enumerator)(cptr, buf);
84 sprintf(buf, "RSS %ld ShMem %ld Data %ld Stack %ld",
86 rus.ru_ixrss / (uptime * hzz), rus.ru_idrss / (uptime * hzz),
87 rus.ru_isrss / (uptime * hzz));
88 (*enumerator)(cptr, buf);
90 sprintf(buf, "Swaps %ld Reclaims %ld Faults %ld",
91 rus.ru_nswap, rus.ru_minflt, rus.ru_majflt);
92 (*enumerator)(cptr, buf);
94 sprintf(buf, "Block in %ld out %ld", rus.ru_inblock, rus.ru_oublock);
95 (*enumerator)(cptr, buf);
97 sprintf(buf, "Msg Rcv %ld Send %ld", rus.ru_msgrcv, rus.ru_msgsnd);
98 (*enumerator)(cptr, buf);
100 sprintf(buf, "Signals %ld Context Vol. %ld Invol %ld",
101 rus.ru_nsignals, rus.ru_nvcsw, rus.ru_nivcsw);
102 (*enumerator)(cptr, buf);
104 #else /* HAVE_GETRUSAGE */
108 int hzz = 1, ticpermin;
109 int umin, smin, usec, ssec;
111 assert(0 != enumerator);
113 hzz = sysconf(_SC_CLK_TCK);
115 ticpermin = hzz * 60;
117 umin = tmsbuf.tms_utime / ticpermin;
118 usec = (tmsbuf.tms_utime % ticpermin) / (float)hzz;
119 smin = tmsbuf.tms_stime / ticpermin;
120 ssec = (tmsbuf.tms_stime % ticpermin) / (float)hzz;
122 mins = (secs / 60) + umin + smin;
125 if (times(&tmsbuf) == -1)
127 secs = tmsbuf.tms_utime + tmsbuf.tms_stime;
129 sprintf(buf, "CPU Secs %d:%d User %d:%d System %d:%d",
130 mins, secs, umin, usec, smin, ssec);
131 (*enumerator)(cptr, buf);
132 #endif /* HAVE_TIMES */
133 #endif /* HAVE_GETRUSAGE */
137 int os_get_sockerr(int fd)
140 #if defined(SO_ERROR)
141 unsigned int len = sizeof(err);
142 getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &len);
150 * Set the client connection into non-blocking mode. If your
151 * system doesn't support this, you can make this a dummy
152 * function (and get all the old problems that plagued the
153 * blocking version of IRC--not a problem if you are a
154 * lightly loaded node...)
156 int os_set_nonblocking(int fd)
164 * NOTE: consult ALL your relevant manual pages *BEFORE* changing
165 * these ioctl's. There are quite a few variations on them,
166 * as can be seen by the PCS one. They are *NOT* all the same.
167 * Heed this well. - Avalon.
176 /* This portion of code might also apply to NeXT. -LynX */
179 if (ioctl(fd, FIONBIO, &res) == -1)
182 if ((res = fcntl(fd, F_GETFL, 0)) == -1)
184 else if (fcntl(fd, F_SETFL, res | nonb) == -1)
194 int os_set_reuseaddr(int fd)
196 unsigned int opt = 1;
197 return (0 == setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
198 (const char*) &opt, sizeof(opt)));
201 int os_set_sockbufs(int fd, unsigned int size)
203 unsigned int opt = size;
204 return (0 == setsockopt(fd, SOL_SOCKET, SO_RCVBUF,
205 (const char*) &opt, sizeof(opt)) &&
206 0 == setsockopt(fd, SOL_SOCKET, SO_SNDBUF,
207 (const char*) &opt, sizeof(opt)));
210 int os_disable_options(int fd)
212 #if defined(IP_OPTIONS) && defined(IPPROTO_IP)
213 return (0 == setsockopt(fd, IPPROTO_IP, IP_OPTIONS, NULL, 0));
220 * Try and find the correct name to use with getrlimit() for setting the max.
221 * number of files allowed to be open by this process.
224 #define RLIMIT_FD_MAX RLIMIT_FDMAX
227 #define RLIMIT_FD_MAX RLIMIT_NOFILE
229 #ifdef RLIMIT_OPEN_MAX
230 #define RLIMIT_FD_MAX RLIMIT_OPEN_MAX
237 int os_set_fdlimit(unsigned int max_descriptors)
239 #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_FD_MAX)
242 if (!getrlimit(RLIMIT_FD_MAX, &limit)) {
243 if (limit.rlim_max < MAXCONNECTIONS)
244 return limit.rlim_max;
245 limit.rlim_cur = limit.rlim_max; /* make soft limit the max */
246 return setrlimit(RLIMIT_FD_MAX, &limit);
248 #endif /* defined(HAVE_SETRLIMIT) && defined(RLIMIT_FD_MAX) */
252 IOResult os_recv_nonb(int fd, char* buf, unsigned int length,
253 unsigned int* count_out)
257 assert(0 != count_out);
261 if (0 < (res = recv(fd, buf, length, 0))) {
262 *count_out = (unsigned) res;
266 if (EWOULDBLOCK == errno || EAGAIN == errno)
272 * 0 == client closed the connection
278 IOResult os_recvfrom_nonb(int fd, char* buf, unsigned int length,
279 unsigned int* length_out, struct sockaddr_in* sin_out)
282 unsigned int len = sizeof(struct sockaddr_in);
284 assert(0 != length_out);
285 assert(0 != sin_out);
289 res = recvfrom(fd, buf, length, 0, (struct sockaddr*) sin_out, &len);
291 if (EWOULDBLOCK == errno || ENOMEM == errno)
299 IOResult os_send_nonb(int fd, const char* buf, unsigned int length,
300 unsigned int* count_out)
304 assert(0 != count_out);
308 if (-1 < (res = send(fd, buf, length, 0))) {
309 *count_out = (unsigned) res;
312 else if (EWOULDBLOCK == errno || EAGAIN == errno ||
313 ENOMEM == errno || ENOBUFS == errno)
318 int os_connect_nonb(int fd, const struct sockaddr_in* sin)
320 if (connect(fd, (struct sockaddr*) sin, sizeof(struct sockaddr_in))) {
321 if (errno != EINPROGRESS)
327 int os_get_sockname(int fd, struct sockaddr_in* sin_out)
329 unsigned int len = sizeof(struct sockaddr_in);
330 assert(0 != sin_out);
331 return (0 == getsockname(fd, (struct sockaddr*) sin_out, &len));
334 int os_get_peername(int fd, struct sockaddr_in* sin_out)
336 unsigned int len = sizeof(struct sockaddr_in);
337 assert(0 != sin_out);
338 return (0 == getpeername(fd, (struct sockaddr*) sin_out, &len));
341 int os_set_listen(int fd, int backlog)
343 return (0 == listen(fd, backlog));