2 * IRC - Internet Relay Chat, ircd/os_linux.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"
34 #include <netinet/in.h>
36 #include <sys/ioctl.h>
37 #include <sys/resource.h>
38 #include <sys/socket.h>
39 #include <sys/types.h>
40 #include <sys/times.h>
42 #include <sys/param.h>
48 * This is part of the STATS replies. There is no offical numeric for this
49 * since this isnt an official command, in much the same way as HASH isnt.
50 * It is also possible that some systems wont support this call or have
51 * different field names for "struct rusage".
54 int os_get_rusage(struct Client *cptr, int uptime, EnumFn enumerator)
65 int ticpermin = HZ * 60;
66 unsigned int tick_count = uptime * HZ;
71 assert(0 != enumerator);
72 if (getrusage(RUSAGE_SELF, &rus) == -1)
75 secs = rus.ru_utime.tv_sec + rus.ru_stime.tv_sec;
79 sprintf(buf, "CPU Secs %ld:%ld User %ld:%ld System %ld:%ld",
81 rus.ru_utime.tv_sec / 60, rus.ru_utime.tv_sec % 60,
82 rus.ru_stime.tv_sec / 60, rus.ru_stime.tv_sec % 60);
83 (*enumerator)(cptr, buf);
85 sprintf(buf, "RSS %ld ShMem %ld Data %ld Stack %ld",
87 rus.ru_ixrss / tick_count, rus.ru_idrss / tick_count,
88 rus.ru_isrss / tick_count);
89 (*enumerator)(cptr, buf);
91 sprintf(buf, "Swaps %ld Reclaims %ld Faults %ld",
92 rus.ru_nswap, rus.ru_minflt, rus.ru_majflt);
93 (*enumerator)(cptr, buf);
95 sprintf(buf, "Block in %ld out %ld", rus.ru_inblock, rus.ru_oublock);
96 (*enumerator)(cptr, buf);
98 sprintf(buf, "Msg Rcv %ld Send %ld", rus.ru_msgrcv, rus.ru_msgsnd);
99 (*enumerator)(cptr, buf);
101 sprintf(buf, "Signals %ld Context Vol. %ld Invol %ld",
102 rus.ru_nsignals, rus.ru_nvcsw, rus.ru_nivcsw);
103 (*enumerator)(cptr, buf);
105 if (times(&tmsbuf) == -1)
108 umin = tmsbuf.tms_utime / ticpermin;
109 usec = (tmsbuf.tms_utime % ticpermin) / (float)HZ;
110 smin = tmsbuf.tms_stime / ticpermin;
111 ssec = (tmsbuf.tms_stime % ticpermin) / (float)HZ;
113 mins = (secs / 60) + umin + smin;
116 sprintf(buf, "CPU Secs %ld:%ld User %d:%d System %d:%d",
117 mins, secs, umin, usec, smin, ssec);
118 (*enumerator)(cptr, buf);
122 int os_get_sockerr(int fd)
125 unsigned int len = sizeof(err);
126 getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &len);
133 * Set the client connection into non-blocking mode. If your
134 * system doesn't support this, you can make this a dummy
135 * function (and get all the old problems that plagued the
136 * blocking version of IRC--not a problem if you are a
137 * lightly loaded node...)
139 int os_set_nonblocking(int fd)
142 return (0 == ioctl(fd, FIONBIO, &res));
149 int os_set_reuseaddr(int fd)
151 unsigned int opt = 1;
152 return (0 == setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)));
155 int os_set_sockbufs(int fd, unsigned int size)
157 unsigned int opt = size;
158 return (0 == setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &opt, sizeof(opt)) &&
159 0 == setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &opt, sizeof(opt)));
162 int os_set_tos(int fd,int tos)
164 unsigned int opt = tos;
165 return (0 == setsockopt(fd, SOL_IP, IP_TOS, &opt, sizeof(opt)));
168 int os_disable_options(int fd)
170 return (0 == setsockopt(fd, IPPROTO_IP, IP_OPTIONS, NULL, 0));
173 int os_set_fdlimit(unsigned int max_descriptors)
177 if (!getrlimit(RLIMIT_NOFILE, &limit)) {
178 if (limit.rlim_max < max_descriptors)
179 return limit.rlim_max;
180 limit.rlim_cur = limit.rlim_max; /* make soft limit the max */
181 return setrlimit(RLIMIT_NOFILE, &limit);
187 * os_recv_nonb - non blocking read of a connection
189 * 1 if data was read or socket is blocked (recoverable error)
190 * count_out > 0 if data was read
192 * 0 if socket closed from other end
193 * -1 if an unrecoverable error occurred
195 IOResult os_recv_nonb(int fd, char* buf, unsigned int length,
196 unsigned int* count_out)
200 assert(0 != count_out);
204 if (0 < (res = recv(fd, buf, length, 0))) {
205 *count_out = (unsigned) res;
209 if (EWOULDBLOCK == errno || EAGAIN == errno)
215 * 0 == client closed the connection
221 IOResult os_recvfrom_nonb(int fd, char* buf, unsigned int length,
222 unsigned int* length_out, struct sockaddr_in* sin_out)
225 unsigned int len = sizeof(struct sockaddr_in);
227 assert(0 != length_out);
228 assert(0 != sin_out);
231 res = recvfrom(fd, buf, length, 0, (struct sockaddr*) sin_out, &len);
233 if (EWOULDBLOCK == errno || ENOMEM == errno)
242 * os_send_nonb - non blocking read of a connection
244 * 1 if data was written
245 * count_out contains amount written
247 * 0 if write call blocked, recoverable error
248 * -1 if an unrecoverable error occurred
250 IOResult os_send_nonb(int fd, const char* buf, unsigned int length,
251 unsigned int* count_out)
255 assert(0 != count_out);
259 if (-1 < (res = send(fd, buf, length, 0))) {
260 *count_out = (unsigned) res;
263 else if (EAGAIN == errno || ENOMEM == errno || ENOBUFS == errno)
270 * os_sendv_nonb - non blocking writev to a connection
272 * 1 if data was written
273 * count_out contains amount written
275 * 0 if write call blocked, recoverable error
276 * -1 if an unrecoverable error occurred
278 IOResult os_sendv_nonb(int fd, struct MsgQ* buf, unsigned int* count_in,
279 unsigned int* count_out)
283 struct iovec iov[IOV_MAX];
286 assert(0 != count_in);
287 assert(0 != count_out);
293 count = msgq_mapiov(buf, iov, IOV_MAX, count_in);
295 if (-1 < (res = writev(fd, iov, count))) {
296 *count_out = (unsigned) res;
299 else if (EAGAIN == errno || ENOMEM == errno || ENOBUFS == errno)
306 IOResult os_connect_nonb(int fd, const struct sockaddr_in* sin)
308 if (connect(fd, (const struct sockaddr*) sin, sizeof(struct sockaddr_in)))
309 return (errno == EINPROGRESS) ? IO_BLOCKED : IO_FAILURE;
313 int os_get_sockname(int fd, struct sockaddr_in* sin_out)
315 unsigned int len = sizeof(struct sockaddr_in);
316 assert(0 != sin_out);
317 return (0 == getsockname(fd, (struct sockaddr*) sin_out, &len));
320 int os_get_peername(int fd, struct sockaddr_in* sin_out)
322 unsigned int len = sizeof(struct sockaddr_in);
323 assert(0 != sin_out);
324 return (0 == getpeername(fd, (struct sockaddr*) sin_out, &len));
327 int os_set_listen(int fd, int backlog)
330 * for linux 2.2 backlog is the number of connections ready to be accepted
331 * not the max syn requests, there is a kernel tweak there to set the max
332 * syn request queue length
334 return (0 == listen(fd, backlog));