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Questions - fseek

Clarification in using fsetpos() in text file

I'm trying to implement an evaluation of the arithmetic expression algorithm for my exam in C. I have a text file with the expression e.g "12 - 2 + cos(8)" in "r" mode. In "wh...
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kostuyk21

c

fseek

fgetpos

Votes: 0

Answers: 0

C POSIX function lseek returns -1 but errno is not set

I have encountered a situation where after calling lseek, I would get -1 as a return value but errno would remain unset. From what I understand by reading the documentation for lseek, -1 return value ...
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Long Claw

c

file

posix

fseek

lseek

Votes: 0

Answers: 0

Why does fseek have "long int offset" instead of "long long int offset"?

C2x, 7.21.9.2 The fseek function: Synopsis #include <stdio.h> int fseek(FILE *stream, long int offset, int whence); Why does fseek have long int offset instead of long long int offset? It see...
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pmor

c

language-lawyer

long-integer

fseek

c-standard-library

Votes: 0

Answers: 1

Latest Answer

The C Standard was formalized in 1990 when most hard drives were smaller than 2 GB. The prototype for fseek() was already in broad use with a long type offset and 32 bits seemed large enough for all ...
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chqrlie

Detect when `fseek()` goes beyond end of file

In <stdio.h>, the function fseek() seems allowed to skip way beyond the end of its file handler, without producing any error code. While I can understand the behavior when the FILE* handler is s...
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Cyan

c

stdio

fseek

Votes: 0

Answers: 1

Latest Answer

... I don't understand the point of such a feature when it's "r" read-only. I don't think that this is an intended feature but I think that it was simply easier to implement this behavior ...
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Martin Rosenau

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