Provided by: libgfarm-dev_2.4.1-1.1ubuntu1_amd64
gfs_pio_truncate - truncate a file to a specified length
#include <gfarm/gfarm.h> char *gfs_pio_truncate (GFS_File gf, file_offset_t length);
The gfs_pio_truncate() function truncates the regular file gf to the length bytes. If the file was previously shorter than the length, it is extended, and the extended part is filled by zero bytes. The file pointer is not changed. You must specify GFS_FILE_MODE_WRITE in opening the file, because it must be open for writing.
NULL The function terminated successfully. GFARM_ERR_NO_MEMORY Insufficient memory was available. Others An error except the above occurred. The reason is shown by its pointed strings.