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usyslog/mksock.c
David Oberhollenzer fb498dba96 Remove any pre-existing socket before binding
Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>
2018-11-05 21:40:50 +01:00

50 lines
836 B
C

/* SPDX-License-Identifier: ISC */
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/un.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <stdio.h>
#include <errno.h>
#include "syslogd.h"
int mksock(const char *path)
{
struct sockaddr_un un;
const char *errmsg;
int fd;
fd = socket(AF_UNIX, SOCK_DGRAM | SOCK_CLOEXEC, 0);
if (fd < 0) {
perror("socket");
return -1;
}
memset(&un, 0, sizeof(un));
un.sun_family = AF_UNIX;
strcpy(un.sun_path, path);
unlink(un.sun_path);
if (bind(fd, (struct sockaddr *)&un, sizeof(un))) {
errmsg ="bind";
goto fail_errno;
}
if (chmod(path, 0777)) {
errmsg = "chmod";
goto fail_errno;
}
return fd;
fail_errno:
fprintf(stderr, "%s: %s: %s\n", path, errmsg, strerror(errno));
close(fd);
unlink(path);
return -1;
}