trusty (3) gfs_pio_truncate.3.gz

NAME

       gfs_pio_truncate - truncate a file to a specified length

SYNOPSIS

       #include <gfarm/gfarm.h>

       char *gfs_pio_truncate (GFS_File gf, file_offset_t length);

DESCRIPTION

       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.

RETURN VALUES

       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.

SEE ALSO

       gfs_pio_create(3), gfs_pio_open(3)