FSEEK.3
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操作系统开发
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- FSEEK(3) Minix Programmer's Manual FSEEK(3)
- NAME
- fseek, ftell, rewind - reposition a stream
- SYNOPSIS
- #include <stdio.h>
- int fseek(FILE *stream, long offset, int ptrname)
- long ftell(FILE *stream)
- void rewind(FILE *stream)
- DESCRIPTION
- Fseek sets the position of the next input or output operation on the
- stream. The new position is at the signed distance offset bytes from the
- beginning, the current position, or the end of the file, according as
- ptrname has the value 0, 1, or 2.
- Fseek undoes any effects of ungetc(3).
- Ftell returns the current value of the offset relative to the beginning
- of the file associated with the named stream. It is measured in bytes on
- UNIX; on some other systems it is a magic cookie, and the only foolproof
- way to obtain an offset for fseek.
- Rewind(stream) is equivalent to fseek(stream, 0L, 0).
- SEE ALSO
- lseek(2), fopen(3).
- DIAGNOSTICS
- Fseek returns -1 for improper seeks, otherwise zero.
- February 24, 1986 1