fseek

Set the file pointer to a location.

📝 Syntax

• fseek(fid, offset, origin)

• status = fseek(fid, offset, origin)

📥 Input argument

• fid - an integer value: file descriptor

• offset - an integer value: number of bytes to move from origin.

• origin - an integer value or a string: location in the file.

📤 Output argument

• status - an integer value: 0 or -1 if there is an error.

📄 Description

fseek moves the file pointer to the location offset within the file fid.

origin can take as value:

'bof' or -1 : beginning of file.

'cof' or 0 : current position in file.

'eof' or 1 : end of file.

offset may be one of the predefined variables SEEK_CUR (current position, or 0), SEEK_SET (beginning, or -1), or SEEK_END (end of file, or 1).

💡 Example

fileID = fopen([tempdir(), 'fseek.txt'],'wt');
fprintf(fileID, 'son is beautiful.');
fseek(fileID, SEEK_CUR, 'bof');
fprintf(fileID, 'sun');
fclose(fileID);
R = fileread([tempdir(), 'fseek.txt'])

🔗 See also

frewind.

🕔 History

Version	📄 Description
1.0.0	initial version