GFS_PIO_READ(3)
NAME
gfs_pio_read - binary stream input
SYNOPSIS
#include <gfarm/gfarm.h> gfarm_error_t gfs_pio_read (GFS_File gf, void * buffer, int size, int * np);
DESCRIPTION
gfs_pio_read() attempts to read up to size bytes from the file referenced by gf into the buffer starting at buffer, and returns the number
of bytes read to the address pointed by np. On end of file, the number
of bytes read is zero.
RETURN VALUES
- GFARM_ERR_NO_ERROR
- The function terminated successfully.
- GFARM_ERR_OPERATION_NOT_PERMITTED
- gf does not specify a regular file.
- GFARM_ERR_BAD_FILE_DESCRIPTOR
- The file descripter specified by gf is not a valid or is not open for reading.
- GFARM_ERR_NO_FILE_SYSTEM_NODE
- There is no available file system node.
- GFARM_ERR_NO_MEMORY
- Insufficient memory was available.
- Others An error except the above occurred. The reason is shown by
- gfarm_error_string(3).