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43 lines
665 B
43 lines
665 B
/**
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* Author......: Jens Steube <jens.steube@gmail.com>
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* License.....: MIT
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*/
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#include "common.h"
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#include "logging.h"
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#include "locking.h"
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#if defined (F_SETLKW)
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void lock_file (FILE *fp)
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{
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struct flock lock;
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memset (&lock, 0, sizeof (struct flock));
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lock.l_type = F_WRLCK;
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while (fcntl (fileno (fp), F_SETLKW, &lock))
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{
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if (errno != EINTR)
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{
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log_error ("ERROR: Failed acquiring write lock: %s", strerror (errno));
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exit (-1);
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}
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}
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}
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void unlock_file (FILE *fp)
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{
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struct flock lock;
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memset (&lock, 0, sizeof (struct flock));
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lock.l_type = F_UNLCK;
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fcntl (fileno (fp), F_SETLK, &lock);
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}
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#endif // F_SETLKW
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