---
name: "io_readfile"
section: "3"
platform: "linux"
package: "libowfat-dev"
version: "0.32-5"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/io_readfile"
---

# io\_readfile(3)

open a file for reading

## NAME

io\_readfile - open a file for reading

## SYNTAX

**#include \<libowfat/io.h\>**

int **io\_readfile**(int64\* d,const char\* s);

## DESCRIPTION

io\_readfile sets d to the number of a new descriptor reading from the disk file named *s*, and returns 1.

If something goes wrong, io\_readfile sets *errno* to indicate the error, and returns 0; it does not create a new descriptor, and it does not touch d.

## SEE ALSO

[io\_createfile(3)](/io_createfile/3.md), [io\_appendfile(3)](/io_appendfile/3.md), [io\_readwritefile(3)](/io_readwritefile/3.md)