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.
22 #include "ircd_osdep.h"
28 #include <netinet/in.h>
30 #include <sys/ioctl.h>
31 #include <sys/resource.h>
32 #include <sys/socket.h>
33 #include <sys/types.h>
34 #include <sys/times.h>
35 #include <sys/param.h>
41 * This is part of the STATS replies. There is no offical numeric for this
42 * since this isnt an official command, in much the same way as HASH isnt.
43 * It is also possible that some systems wont support this call or have
44 * different field names for "struct rusage".
47 int os_get_rusage(struct Client *cptr, int uptime, EnumFn enumerator)
58 int ticpermin = HZ * 60;
59 unsigned int tick_count = uptime * HZ;
64 assert(0 != enumerator);
65 if (getrusage(RUSAGE_SELF, &rus) == -1)
68 secs = rus.ru_utime.tv_sec + rus.ru_stime.tv_sec;
72 sprintf(buf, "CPU Secs %ld:%ld User %ld:%ld System %ld:%ld",
74 rus.ru_utime.tv_sec / 60, rus.ru_utime.tv_sec % 60,
75 rus.ru_stime.tv_sec / 60, rus.ru_stime.tv_sec % 60);
76 (*enumerator)(cptr, buf);
78 sprintf(buf, "RSS %ld ShMem %ld Data %ld Stack %ld",
80 rus.ru_ixrss / tick_count, rus.ru_idrss / tick_count,
81 rus.ru_isrss / tick_count);
82 (*enumerator)(cptr, buf);
84 sprintf(buf, "Swaps %ld Reclaims %ld Faults %ld",
85 rus.ru_nswap, rus.ru_minflt, rus.ru_majflt);
86 (*enumerator)(cptr, buf);
88 sprintf(buf, "Block in %ld out %ld", rus.ru_inblock, rus.ru_oublock);
89 (*enumerator)(cptr, buf);
91 sprintf(buf, "Msg Rcv %ld Send %ld", rus.ru_msgrcv, rus.ru_msgsnd);
92 (*enumerator)(cptr, buf);
94 sprintf(buf, "Signals %ld Context Vol. %ld Invol %ld",
95 rus.ru_nsignals, rus.ru_nvcsw, rus.ru_nivcsw);
96 (*enumerator)(cptr, buf);
98 if (times(&tmsbuf) == -1)
101 umin = tmsbuf.tms_utime / ticpermin;
102 usec = (tmsbuf.tms_utime % ticpermin) / (float)HZ;
103 smin = tmsbuf.tms_stime / ticpermin;
104 ssec = (tmsbuf.tms_stime % ticpermin) / (float)HZ;
106 mins = (secs / 60) + umin + smin;
109 sprintf(buf, "CPU Secs %ld:%ld User %d:%d System %d:%d",
110 mins, secs, umin, usec, smin, ssec);
111 (*enumerator)(cptr, buf);
115 int os_get_sockerr(int fd)
118 unsigned int len = sizeof(err);
119 getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &len);
126 * Set the client connection into non-blocking mode. If your
127 * system doesn't support this, you can make this a dummy
128 * function (and get all the old problems that plagued the
129 * blocking version of IRC--not a problem if you are a
130 * lightly loaded node...)
132 int os_set_nonblocking(int fd)
135 return (0 == ioctl(fd, FIONBIO, &res));
142 int os_set_reuseaddr(int fd)
144 unsigned int opt = 1;
145 return (0 == setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)));
148 int os_set_sockbufs(int fd, unsigned int size)
150 unsigned int opt = size;
151 return (0 == setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &opt, sizeof(opt)) &&
152 0 == setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &opt, sizeof(opt)));
155 int os_disable_options(int fd)
157 return (0 == setsockopt(fd, IPPROTO_IP, IP_OPTIONS, NULL, 0));
160 int os_set_fdlimit(unsigned int max_descriptors)
164 if (!getrlimit(RLIMIT_NOFILE, &limit)) {
165 if (limit.rlim_max < max_descriptors)
166 return limit.rlim_max;
167 limit.rlim_cur = limit.rlim_max; /* make soft limit the max */
168 return setrlimit(RLIMIT_NOFILE, &limit);
174 * os_recv_nonb - non blocking read of a connection
176 * 1 if data was read or socket is blocked (recoverable error)
177 * count_out > 0 if data was read
179 * 0 if socket closed from other end
180 * -1 if an unrecoverable error occurred
182 IOResult os_recv_nonb(int fd, char* buf, unsigned int length,
183 unsigned int* count_out)
187 assert(0 != count_out);
191 if (0 < (res = recv(fd, buf, length, 0))) {
192 *count_out = (unsigned) res;
196 if (EWOULDBLOCK == errno || EAGAIN == errno)
202 * 0 == client closed the connection
208 IOResult os_recvfrom_nonb(int fd, char* buf, unsigned int length,
209 unsigned int* length_out, struct sockaddr_in* sin_out)
212 unsigned int len = sizeof(struct sockaddr_in);
214 assert(0 != length_out);
215 assert(0 != sin_out);
218 res = recvfrom(fd, buf, length, 0, (struct sockaddr*) sin_out, &len);
220 if (EWOULDBLOCK == errno || ENOMEM == errno)
229 * os_send_nonb - non blocking read of a connection
231 * 1 if data was written
232 * count_out contains amount written
234 * 0 if write call blocked, recoverable error
235 * -1 if an unrecoverable error occurred
237 IOResult os_send_nonb(int fd, const char* buf, unsigned int length,
238 unsigned int* count_out)
242 assert(0 != count_out);
246 if (-1 < (res = send(fd, buf, length, 0))) {
247 *count_out = (unsigned) res;
250 else if (EAGAIN == errno || ENOMEM == errno || ENOBUFS == errno)
257 int os_connect_nonb(int fd, const struct sockaddr_in* sin)
259 if (connect(fd, (const struct sockaddr*) sin, sizeof(struct sockaddr_in))) {
260 if (errno != EINPROGRESS)
266 int os_get_sockname(int fd, struct sockaddr_in* sin_out)
268 unsigned int len = sizeof(struct sockaddr_in);
269 assert(0 != sin_out);
270 return (0 == getsockname(fd, (struct sockaddr*) sin_out, &len));
273 int os_get_peername(int fd, struct sockaddr_in* sin_out)
275 unsigned int len = sizeof(struct sockaddr_in);
276 assert(0 != sin_out);
277 return (0 == getpeername(fd, (struct sockaddr*) sin_out, &len));
280 int os_set_listen(int fd, int backlog)
283 * for linux 2.2 backlog is the number of connections ready to be accepted
284 * not the max syn requests, there is a kernel tweak there to set the max
285 * syn request queue length
287 return (0 == listen(fd, backlog));