StdIO Functions

Source location

  • The main source for string functions is located at: libc/src/stdio with subdirectories for internal implementations.

Implementation Status

Formatted Input/Output Functions

These functions take in format strings and arguments of various types and convert either to or from those arguments. These functions are the current focus (owner: michaelrj).

Function Name

Available

*printf

Mostly

*scanf

FILE Access

These functions are used to interact with the FILE object type, which is an I/O stream, often used to represent a file on the host’s hard drive. Currently the FILE object is only available on linux.

Function Name

Available

fopen

freopen

fclose

fflush

setbuf

setvbuf

ftell

fgetpos

fseek

fsetpos

rewind

tmpfile

clearerr

feof

ferror

flockfile

funlockfile

Operations on system files

These functions operate on files on the host’s system, without using the FILE object type. They only take the name of the file being operated on.

Function_Name

Available

remove

rename

tmpnam

Unformatted FILE Input/Output Functions

The gets function was removed in C11 for having no bounds checking and therefor being impossible to use safely.

Function Name

Available

(f)getc

fgets

getchar

fread

(f)putc

(f)puts

putchar

fwrite

ungetc