38 lines
688 B
C
38 lines
688 B
C
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <fcntl.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <unistd.h>
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#include "unix_lock.h"
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int UnixSocketLock(const char *format,...)
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{
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int lockfd = socket(AF_UNIX, SOCK_STREAM, 0);
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if(lockfd >= 0)
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{
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va_list ap;
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struct sockaddr_un addr;
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int len;
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addr.sun_family = AF_UNIX;
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va_start(ap, format);
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vsnprintf(addr.sun_path+1, sizeof(addr.sun_path)-1, format, ap);
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va_end(ap);
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addr.sun_path[0] = '@';
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len = SUN_LEN(&addr);
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addr.sun_path[0] = '\0';
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if(bind(lockfd, (struct sockaddr *)&addr, len) == 0)
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fcntl(lockfd, F_SETFD, FD_CLOEXEC);
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else {
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close(lockfd);
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lockfd = -1;
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}
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}
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return lockfd;
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}
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