diff options
Diffstat (limited to 'support/support.h')
| -rw-r--r-- | support/support.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/support/support.h b/support/support.h index b61fe0735c..34ae6e10cd 100644 --- a/support/support.h +++ b/support/support.h @@ -65,6 +65,12 @@ void support_write_file_string (const char *path, const char *contents); the result). */ char *support_quote_blob (const void *blob, size_t length); +/* Returns non-zero if the file descriptor is a regular file on a file + system which supports holes (that is, seeking and writing does not + allocate storage for the range of zeros). FD must refer to a + regular file open for writing, and initially empty. */ +int support_descriptor_supports_holes (int fd); + /* Error-checking wrapper functions which terminate the process on error. */ |