dwl/util.c

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/* See LICENSE.dwm file for copyright and license details. */
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
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#include <fcntl.h>
#include "util.h"
void
die(const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
if (fmt[0] && fmt[strlen(fmt)-1] == ':') {
fputc(' ', stderr);
perror(NULL);
} else {
fputc('\n', stderr);
}
exit(1);
}
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void *
ecalloc(size_t nmemb, size_t size)
{
void *p;
if (!(p = calloc(nmemb, size)))
die("calloc:");
return p;
}
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int
fd_set_nonblock(int fd) {
int flags = fcntl(fd, F_GETFL);
if (flags < 0) {
perror("fcntl(F_GETFL):");
return -1;
}
if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) < 0) {
perror("fcntl(F_SETFL):");
return -1;
}
return 0;
}