tcompat.c - dedup - deduplicating backup program
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       ---
       tcompat.c (334B)
       ---
            1 #ifdef __linux__
            2 #define _GNU_SOURCE
            3 #include <fcntl.h>
            4 
            5 int
            6 punchhole(int fd, off_t offset, off_t len)
            7 {
            8         int mode;
            9 
           10         mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE;
           11         return fallocate(fd, mode, offset, len);
           12 }
           13 #else
           14 #include <sys/types.h>
           15 #include <unistd.h>
           16 
           17 int
           18 punchhole(int fd, off_t offset, off_t len)
           19 {
           20         return -1;
           21 }
           22 #endif