22 lines
777 B
C
22 lines
777 B
C
#include <stdio.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <unistd.h>
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int lock_reg(int, int, off_t, int, off_t, int);
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#define read_lock(fd, offset, whence, len) \
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lock_reg(fd, F_RDLCK, offset, whence, len, F_SETLK)
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#define write_lock(fd, offset, whence, len) \
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lock_reg(fd, F_WRLCK, offset, whence, len, F_SETLK)
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#define un_lock(fd, offset, whence, len) \
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lock_reg(fd, F_UNLCK, offset, whence, len, F_SETLK)
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#define readb_lock(fd, offset, whence, len) \
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lock_reg(fd, F_RDLCK, offset, whence, len, F_SETLKW)
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#define writeb_lock(fd, offset, whence, len) \
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lock_reg(fd, F_WRLCK, offset, whence, len, F_SETLKW)
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#define unb_lock(fd, offset, whence, len) \
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lock_reg(fd, F_UNLCK, offset, whence, len, F_SETLKW)
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