mongoc_gridfs_file_seek man page

mongoc_gridfs_file_seek() — Adjust the file position pointer in the given file by delta, starting from the position whence. The whence argument is interpreted as in fseek(2):

Synopsis

int
mongoc_gridfs_file_seek (mongoc_gridfs_file_t *file,
                         int64_t               delta,
                         int                   whence);

Parameters

file
A mongoc_gridfs_file_t
delta
The amount to move the file position. May be positive or negative.
whence
One of SEEK_SET, SEEK_CUR or SEEK_END.

Description

Adjust the file position pointer in the given file by delta , starting from the position whence whence argument is interpreted as in fseek(2) :

SEEK_SET
Set the position relative to the start of the file.
SEEK_CUR
Move delta relative to the current file position.
SEEK_END
Move delta relative to the end of the file.

On success, the file's underlying position pointer is set appropriately. On failure, the file position is NOT changed and errno is set to indicate the error.

Errors

EINVAL
whence is not one of SEEK_SET, SEEK_CUR or SEEK_END.
EINVAL
The resulting file position would be negative.

Returns

Returns 0 if successful; otherwise ‐1 and errno is set.

Colophon

This page is part of MongoDB C Driver. Please report any bugs at https://jira.mongodb.org/browse/CDRIVER.

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