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"
28 #include <netinet/in.h>
31 #include <sys/ioctl.h>
32 #include <sys/types.h>
33 #include <sys/resource.h>
34 #include <sys/socket.h>
42 #include <sys/syscall.h>
43 #define getrusage(a,b) syscall(SYS_GETRUSAGE, a, b)
47 * This is part of the STATS replies. There is no offical numeric for this
48 * since this isnt an official command, in much the same way as HASH isnt.
49 * It is also possible that some systems wont support this call or have
50 * different field names for "struct rusage".
53 int os_get_rusage(struct Client *cptr, int uptime, EnumFn enumerator)
68 hzz = sysconf(_SC_CLK_TCK);
73 assert(0 != enumerator);
74 if (getrusage(RUSAGE_SELF, &rus) == -1)
77 secs = rus.ru_utime.tv_sec + rus.ru_stime.tv_sec;
81 sprintf(buf, "CPU Secs %ld:%ld User %ld:%ld System %ld:%ld",
83 rus.ru_utime.tv_sec / 60, rus.ru_utime.tv_sec % 60,
84 rus.ru_stime.tv_sec / 60, rus.ru_stime.tv_sec % 60);
85 (*enumerator)(cptr, buf);
87 sprintf(buf, "RSS %ld ShMem %ld Data %ld Stack %ld",
89 rus.ru_ixrss / (uptime * hzz), rus.ru_idrss / (uptime * hzz),
90 rus.ru_isrss / (uptime * hzz));
91 (*enumerator)(cptr, buf);
93 sprintf(buf, "Swaps %ld Reclaims %ld Faults %ld",
94 rus.ru_nswap, rus.ru_minflt, rus.ru_majflt);
95 (*enumerator)(cptr, buf);
97 sprintf(buf, "Block in %ld out %ld", rus.ru_inblock, rus.ru_oublock);
98 (*enumerator)(cptr, buf);
100 sprintf(buf, "Msg Rcv %ld Send %ld", rus.ru_msgrcv, rus.ru_msgsnd);
101 (*enumerator)(cptr, buf);
103 sprintf(buf, "Signals %ld Context Vol. %ld Invol %ld",
104 rus.ru_nsignals, rus.ru_nvcsw, rus.ru_nivcsw);
105 (*enumerator)(cptr, buf);
107 #else /* HAVE_GETRUSAGE */
111 int hzz = 1, ticpermin;
112 int umin, smin, usec, ssec;
114 assert(0 != enumerator);
116 hzz = sysconf(_SC_CLK_TCK);
118 ticpermin = hzz * 60;
120 umin = tmsbuf.tms_utime / ticpermin;
121 usec = (tmsbuf.tms_utime % ticpermin) / (float)hzz;
122 smin = tmsbuf.tms_stime / ticpermin;
123 ssec = (tmsbuf.tms_stime % ticpermin) / (float)hzz;
125 mins = (secs / 60) + umin + smin;
128 if (times(&tmsbuf) == -1)
130 secs = tmsbuf.tms_utime + tmsbuf.tms_stime;
132 sprintf(buf, "CPU Secs %d:%d User %d:%d System %d:%d",
133 mins, secs, umin, usec, smin, ssec);
134 (*enumerator)(cptr, buf);
135 #endif /* HAVE_TIMES */
136 #endif /* HAVE_GETRUSAGE */
140 int os_get_sockerr(int fd)
143 #if defined(SO_ERROR)
144 unsigned int len = sizeof(err);
145 getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &len);
153 * Set the client connection into non-blocking mode. If your
154 * system doesn't support this, you can make this a dummy
155 * function (and get all the old problems that plagued the
156 * blocking version of IRC--not a problem if you are a
157 * lightly loaded node...)
159 int os_set_nonblocking(int fd)
167 * NOTE: consult ALL your relevant manual pages *BEFORE* changing
168 * these ioctl's. There are quite a few variations on them,
169 * as can be seen by the PCS one. They are *NOT* all the same.
170 * Heed this well. - Avalon.
179 /* This portion of code might also apply to NeXT. -LynX */
182 if (ioctl(fd, FIONBIO, &res) == -1)
185 if ((res = fcntl(fd, F_GETFL, 0)) == -1)
187 else if (fcntl(fd, F_SETFL, res | nonb) == -1)
197 int os_set_reuseaddr(int fd)
199 unsigned int opt = 1;
200 return (0 == setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
201 (const char*) &opt, sizeof(opt)));
204 int os_set_sockbufs(int fd, unsigned int size)
206 unsigned int opt = size;
207 return (0 == setsockopt(fd, SOL_SOCKET, SO_RCVBUF,
208 (const char*) &opt, sizeof(opt)) &&
209 0 == setsockopt(fd, SOL_SOCKET, SO_SNDBUF,
210 (const char*) &opt, sizeof(opt)));
213 int os_disable_options(int fd)
215 #if defined(IP_OPTIONS) && defined(IPPROTO_IP)
216 return (0 == setsockopt(fd, IPPROTO_IP, IP_OPTIONS, NULL, 0));
223 * Try and find the correct name to use with getrlimit() for setting the max.
224 * number of files allowed to be open by this process.
227 #define RLIMIT_FD_MAX RLIMIT_FDMAX
230 #define RLIMIT_FD_MAX RLIMIT_NOFILE
232 #ifdef RLIMIT_OPEN_MAX
233 #define RLIMIT_FD_MAX RLIMIT_OPEN_MAX
240 int os_set_fdlimit(unsigned int max_descriptors)
242 #if defined(HAVE_SETRLIMIT) && defined(RLIMIT_FD_MAX)
245 if (!getrlimit(RLIMIT_FD_MAX, &limit)) {
246 if (limit.rlim_max < MAXCONNECTIONS)
247 return limit.rlim_max;
248 limit.rlim_cur = limit.rlim_max; /* make soft limit the max */
249 return setrlimit(RLIMIT_FD_MAX, &limit);
251 #endif /* defined(HAVE_SETRLIMIT) && defined(RLIMIT_FD_MAX) */
255 IOResult os_recv_nonb(int fd, char* buf, unsigned int length,
256 unsigned int* count_out)
260 assert(0 != count_out);
264 if (0 < (res = recv(fd, buf, length, 0))) {
265 *count_out = (unsigned) res;
269 if (EWOULDBLOCK == errno || EAGAIN == errno)
275 * 0 == client closed the connection
281 IOResult os_recvfrom_nonb(int fd, char* buf, unsigned int length,
282 unsigned int* length_out, struct sockaddr_in* sin_out)
285 unsigned int len = sizeof(struct sockaddr_in);
287 assert(0 != length_out);
288 assert(0 != sin_out);
291 res = recvfrom(fd, buf, length, 0, (struct sockaddr*) sin_out, &len);
293 if (EWOULDBLOCK == errno || ENOMEM == errno)
301 IOResult os_send_nonb(int fd, const char* buf, unsigned int length,
302 unsigned int* count_out)
306 assert(0 != count_out);
310 if (-1 < (res = send(fd, buf, length, 0))) {
311 *count_out = (unsigned) res;
314 else if (EWOULDBLOCK == errno || EAGAIN == errno ||
315 ENOMEM == errno || ENOBUFS == errno)
320 int os_connect_nonb(int fd, const struct sockaddr_in* sin)
322 if (connect(fd, (struct sockaddr*) sin, sizeof(struct sockaddr_in))) {
323 if (errno != EINPROGRESS)
329 int os_get_sockname(int fd, struct sockaddr_in* sin_out)
331 unsigned int len = sizeof(struct sockaddr_in);
332 assert(0 != sin_out);
333 return (0 == getsockname(fd, (struct sockaddr*) sin_out, &len));
336 int os_get_peername(int fd, struct sockaddr_in* sin_out)
338 unsigned int len = sizeof(struct sockaddr_in);
339 assert(0 != sin_out);
340 return (0 == getpeername(fd, (struct sockaddr*) sin_out, &len));
343 int os_set_listen(int fd, int backlog)
345 return (0 == listen(fd, backlog));