| 1 | /* |
| 2 | * This file is part of DisOrder. |
| 3 | * Copyright (C) 2004, 2005, 2007-9, 2013 Richard Kettlewell |
| 4 | * |
| 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 3 of the License, or |
| 8 | * (at your option) any later version. |
| 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 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 17 | */ |
| 18 | /** @file lib/syscalls.c |
| 19 | * @brief Error-checking library call wrappers |
| 20 | */ |
| 21 | #include "common.h" |
| 22 | |
| 23 | #if HAVE_UNISTD_H |
| 24 | # include <unistd.h> |
| 25 | #endif |
| 26 | #include <errno.h> |
| 27 | #include <fcntl.h> |
| 28 | #include <sys/types.h> |
| 29 | #if HAVE_SYS_SOCKET_H |
| 30 | # include <sys/socket.h> |
| 31 | #endif |
| 32 | #if HAVE_SYS_TIME_H |
| 33 | # include <sys/time.h> |
| 34 | #endif |
| 35 | #include <signal.h> |
| 36 | #include <time.h> |
| 37 | |
| 38 | #include "syscalls.h" |
| 39 | #include "log.h" |
| 40 | #include "printf.h" |
| 41 | |
| 42 | int mustnotbeminus1(const char *what, int ret) { |
| 43 | if(ret == -1) |
| 44 | disorder_fatal(errno, "error calling %s", what); |
| 45 | return ret; |
| 46 | } |
| 47 | |
| 48 | pid_t xfork(void) { |
| 49 | pid_t pid; |
| 50 | |
| 51 | if((pid = fork()) < 0) |
| 52 | disorder_fatal(errno, "error calling fork"); |
| 53 | return pid; |
| 54 | } |
| 55 | |
| 56 | void xclose_guts(const char *path, int line, int fd) { |
| 57 | if(close(fd) < 0) |
| 58 | disorder_fatal(errno, "%s:%d: close %d", path, line, fd); |
| 59 | } |
| 60 | |
| 61 | void xdup2(int fd1, int fd2) { |
| 62 | mustnotbeminus1("dup2", dup2(fd1, fd2)); |
| 63 | } |
| 64 | |
| 65 | void xpipe(int *fdp) { |
| 66 | mustnotbeminus1("pipe", pipe(fdp)); |
| 67 | } |
| 68 | |
| 69 | void nonblock(int fd) { |
| 70 | mustnotbeminus1("fcntl F_SETFL", |
| 71 | fcntl(fd, F_SETFL, |
| 72 | mustnotbeminus1("fcntl F_GETFL", |
| 73 | fcntl(fd, F_GETFL)) | O_NONBLOCK)); |
| 74 | } |
| 75 | |
| 76 | void blocking(int fd) { |
| 77 | mustnotbeminus1("fcntl F_SETFL", |
| 78 | fcntl(fd, F_SETFL, |
| 79 | mustnotbeminus1("fcntl F_GETFL", |
| 80 | fcntl(fd, F_GETFL)) & ~O_NONBLOCK)); |
| 81 | } |
| 82 | |
| 83 | void cloexec(int fd) { |
| 84 | mustnotbeminus1("fcntl F_SETFD", |
| 85 | fcntl(fd, F_SETFD, |
| 86 | mustnotbeminus1("fcntl F_GETFD", |
| 87 | fcntl(fd, F_GETFD)) | FD_CLOEXEC)); |
| 88 | } |
| 89 | |
| 90 | void xlisten(int fd, int q) { |
| 91 | mustnotbeminus1("listen", listen(fd, q)); |
| 92 | } |
| 93 | |
| 94 | void xshutdown(int fd, int how) { |
| 95 | mustnotbeminus1("shutdown", shutdown(fd, how)); |
| 96 | } |
| 97 | |
| 98 | void xsetsockopt(int fd, int l, int o, const void *v, socklen_t vl) { |
| 99 | mustnotbeminus1("setsockopt", setsockopt(fd, l, o, v, vl)); |
| 100 | } |
| 101 | |
| 102 | int xsocket(int d, int t, int p) { |
| 103 | return mustnotbeminus1("socket", socket(d, t, p)); |
| 104 | } |
| 105 | |
| 106 | void xconnect(int fd, const struct sockaddr *sa, socklen_t sl) { |
| 107 | mustnotbeminus1("connect", connect(fd, sa, sl)); |
| 108 | } |
| 109 | |
| 110 | void xsigprocmask(int how, const sigset_t *set, sigset_t *oldset) { |
| 111 | mustnotbeminus1("sigprocmask", sigprocmask(how, set, oldset)); |
| 112 | } |
| 113 | |
| 114 | void xsigaction(int sig, const struct sigaction *sa, struct sigaction *oldsa) { |
| 115 | mustnotbeminus1("sigaction", sigaction(sig, sa, oldsa)); |
| 116 | } |
| 117 | |
| 118 | int xprintf(const char *fmt, ...) { |
| 119 | va_list ap; |
| 120 | int n; |
| 121 | |
| 122 | va_start(ap, fmt); |
| 123 | n = mustnotbeminus1("byte_vfprintf", byte_vfprintf(stdout, fmt, ap)); |
| 124 | va_end(ap); |
| 125 | return n; |
| 126 | } |
| 127 | |
| 128 | void xfclose(FILE *fp) { |
| 129 | mustnotbeminus1("fclose", fclose(fp)); |
| 130 | } |
| 131 | |
| 132 | int xstrtol(long *n, const char *s, char **ep, int base) { |
| 133 | errno = 0; |
| 134 | *n = strtol(s, ep, base); |
| 135 | return errno; |
| 136 | } |
| 137 | |
| 138 | int xstrtoll(long_long *n, const char *s, char **ep, int base) { |
| 139 | errno = 0; |
| 140 | *n = strtoll(s, ep, base); |
| 141 | return errno; |
| 142 | } |
| 143 | |
| 144 | int xnice(int inc) { |
| 145 | int ret; |
| 146 | |
| 147 | /* some versions of nice() return the new nice value which in principle could |
| 148 | * be -1 */ |
| 149 | errno = 0; |
| 150 | ret = nice(inc); |
| 151 | if(errno) |
| 152 | disorder_fatal(errno, "error calling nice"); |
| 153 | return ret; |
| 154 | } |
| 155 | |
| 156 | void xgettimeofday(struct timeval *tv, struct timezone *tz) { |
| 157 | mustnotbeminus1("gettimeofday", gettimeofday(tv, tz)); |
| 158 | } |
| 159 | |
| 160 | time_t xtime(time_t *whenp) { |
| 161 | struct timeval tv; |
| 162 | |
| 163 | xgettimeofday(&tv, NULL); |
| 164 | if(whenp) |
| 165 | *whenp = tv.tv_sec; |
| 166 | return tv.tv_sec; |
| 167 | } |
| 168 | |
| 169 | void xnanosleep(const struct timespec *req, struct timespec *rem) { |
| 170 | mustnotbeminus1("nanosleep", nanosleep(req, rem)); |
| 171 | } |
| 172 | |
| 173 | /* |
| 174 | Local Variables: |
| 175 | c-basic-offset:2 |
| 176 | comment-column:40 |
| 177 | End: |
| 178 | */ |