Commit | Line | Data |
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460b9539 | 1 | /* |
2 | * This file is part of DisOrder. | |
5aff007d | 3 | * Copyright (C) 2004, 2005, 2007, 2008 Richard Kettlewell |
460b9539 | 4 | * |
e7eb3a27 | 5 | * This program is free software: you can redistribute it and/or modify |
460b9539 | 6 | * it under the terms of the GNU General Public License as published by |
e7eb3a27 | 7 | * the Free Software Foundation, either version 3 of the License, or |
460b9539 | 8 | * (at your option) any later version. |
e7eb3a27 RK |
9 | * |
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. | |
14 | * | |
460b9539 | 15 | * You should have received a copy of the GNU General Public License |
e7eb3a27 | 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
460b9539 | 17 | */ |
132a5a4a RK |
18 | /** @file lib/syscalls.c |
19 | * @brief Error-checking library call wrappers | |
20 | */ | |
05b75f8d | 21 | #include "common.h" |
460b9539 | 22 | |
23 | #include <unistd.h> | |
24 | #include <errno.h> | |
25 | #include <fcntl.h> | |
26 | #include <sys/types.h> | |
27 | #include <sys/socket.h> | |
28 | #include <sys/time.h> | |
29 | #include <signal.h> | |
460b9539 | 30 | |
31 | #include "syscalls.h" | |
32 | #include "log.h" | |
33 | #include "printf.h" | |
34 | ||
35 | int mustnotbeminus1(const char *what, int ret) { | |
36 | if(ret == -1) | |
37 | fatal(errno, "error calling %s", what); | |
38 | return ret; | |
39 | } | |
40 | ||
41 | pid_t xfork(void) { | |
42 | pid_t pid; | |
43 | ||
44 | if((pid = fork()) < 0) fatal(errno, "error calling fork"); | |
45 | return pid; | |
46 | } | |
47 | ||
8bb67afe RK |
48 | void xclose_guts(const char *path, int line, int fd) { |
49 | if(close(fd) < 0) | |
50 | fatal(errno, "%s:%d: close %d", path, line, fd); | |
460b9539 | 51 | } |
52 | ||
53 | void xdup2(int fd1, int fd2) { | |
54 | mustnotbeminus1("dup2", dup2(fd1, fd2)); | |
55 | } | |
56 | ||
57 | void xpipe(int *fdp) { | |
58 | mustnotbeminus1("pipe", pipe(fdp)); | |
59 | } | |
60 | ||
61 | void nonblock(int fd) { | |
62 | mustnotbeminus1("fcntl F_SETFL", | |
63 | fcntl(fd, F_SETFL, | |
64 | mustnotbeminus1("fcntl F_GETFL", | |
65 | fcntl(fd, F_GETFL)) | O_NONBLOCK)); | |
66 | } | |
67 | ||
937be4c0 RK |
68 | void blocking(int fd) { |
69 | mustnotbeminus1("fcntl F_SETFL", | |
70 | fcntl(fd, F_SETFL, | |
71 | mustnotbeminus1("fcntl F_GETFL", | |
72 | fcntl(fd, F_GETFL)) & ~O_NONBLOCK)); | |
73 | } | |
74 | ||
460b9539 | 75 | void cloexec(int fd) { |
76 | mustnotbeminus1("fcntl F_SETFD", | |
77 | fcntl(fd, F_SETFD, | |
78 | mustnotbeminus1("fcntl F_GETFD", | |
79 | fcntl(fd, F_GETFD)) | FD_CLOEXEC)); | |
80 | } | |
81 | ||
82 | void xlisten(int fd, int q) { | |
83 | mustnotbeminus1("listen", listen(fd, q)); | |
84 | } | |
85 | ||
86 | void xshutdown(int fd, int how) { | |
87 | mustnotbeminus1("shutdown", shutdown(fd, how)); | |
88 | } | |
89 | ||
90 | void xsetsockopt(int fd, int l, int o, const void *v, socklen_t vl) { | |
91 | mustnotbeminus1("setsockopt", setsockopt(fd, l, o, v, vl)); | |
92 | } | |
93 | ||
94 | int xsocket(int d, int t, int p) { | |
95 | return mustnotbeminus1("socket", socket(d, t, p)); | |
96 | } | |
97 | ||
98 | void xconnect(int fd, const struct sockaddr *sa, socklen_t sl) { | |
99 | mustnotbeminus1("connect", connect(fd, sa, sl)); | |
100 | } | |
101 | ||
102 | void xsigprocmask(int how, const sigset_t *set, sigset_t *oldset) { | |
103 | mustnotbeminus1("sigprocmask", sigprocmask(how, set, oldset)); | |
104 | } | |
105 | ||
106 | void xsigaction(int sig, const struct sigaction *sa, struct sigaction *oldsa) { | |
107 | mustnotbeminus1("sigaction", sigaction(sig, sa, oldsa)); | |
108 | } | |
109 | ||
110 | int xprintf(const char *fmt, ...) { | |
111 | va_list ap; | |
112 | int n; | |
113 | ||
114 | va_start(ap, fmt); | |
115 | n = mustnotbeminus1("byte_vfprintf", byte_vfprintf(stdout, fmt, ap)); | |
116 | va_end(ap); | |
117 | return n; | |
118 | } | |
119 | ||
120 | void xfclose(FILE *fp) { | |
121 | mustnotbeminus1("fclose", fclose(fp)); | |
122 | } | |
123 | ||
124 | int xstrtol(long *n, const char *s, char **ep, int base) { | |
125 | errno = 0; | |
126 | *n = strtol(s, ep, base); | |
127 | return errno; | |
128 | } | |
129 | ||
130 | int xstrtoll(long_long *n, const char *s, char **ep, int base) { | |
131 | errno = 0; | |
132 | *n = strtoll(s, ep, base); | |
133 | return errno; | |
134 | } | |
135 | ||
136 | int xnice(int inc) { | |
137 | int ret; | |
138 | ||
139 | /* some versions of nice() return the new nice value which in principle could | |
140 | * be -1 */ | |
141 | errno = 0; | |
142 | ret = nice(inc); | |
143 | if(errno) fatal(errno, "error calling nice"); | |
144 | return ret; | |
145 | } | |
146 | ||
147 | void xgettimeofday(struct timeval *tv, struct timezone *tz) { | |
148 | mustnotbeminus1("gettimeofday", gettimeofday(tv, tz)); | |
149 | } | |
150 | ||
4265e5d3 RK |
151 | time_t xtime(time_t *whenp) { |
152 | struct timeval tv; | |
153 | ||
154 | xgettimeofday(&tv, NULL); | |
155 | if(whenp) | |
156 | *whenp = tv.tv_sec; | |
157 | return tv.tv_sec; | |
158 | } | |
159 | ||
460b9539 | 160 | /* |
161 | Local Variables: | |
162 | c-basic-offset:2 | |
163 | comment-column:40 | |
164 | End: | |
165 | */ |