NAME

rewind — reset the file position indicator in a stream

SYNOPSIS

#include <stdio.h>

void rewind(FILE *stream);


DESCRIPTION

^[CX] The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1-2024 defers to the ISO C standard.

The call:

rewind(stream)

shall be equivalent to:

(void) fseek(stream, 0L, SEEK_SET)

except that rewind() shall also ensure the error indicator is clear when the function returns.

^[CX] Since rewind() does not return a value, an application wishing to detect errors should clear errno, then call rewind(), and if errno is non-zero, assume an error has occurred.

RETURN VALUE

The rewind() function shall not return a value.

ERRORS

^[CX] Refer to fseek with the exception of [EINVAL] which does not apply.

EXAMPLES

None.

APPLICATION USAGE

None.

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

2.5 Standard I/O Streams, fseek

XBD <stdio.h>

CHANGE HISTORY

First released in Issue 1. Derived from Issue 1 of the SVID.

Issue 6

Extensions beyond the ISO C standard are marked.

Issue 7

POSIX.1-2008, Technical Corrigendum 1, XSH/TC1-2008/0513 [14] is applied.

Issue 8

Austin Group Defect 1414 is applied, clarifying that rewind() ensures the error indicator is clear when the function returns.