Input and Output (`stdio.h')

This chapter comprises functions to manage files or other input/output streams. Among these functions are subroutines to generate or scan strings according to specifications from a format string.

The underlying facilities for input and output depend on the host system, but these functions provide a uniform interface.

The corresponding declarations are in `stdio.h'.

The reentrant versions of these functions use macros

_stdin_r(reent)
_stdout_r(reent)
_stderr_r(reent)

instead of the globals stdin, stdout, and stderr. The argument <[reent]> is a pointer to a reentrancy structure.

• clearerr: Clear file or stream error indicator
• fclose: Close a file
• feof: Test for end of file
• ferror: Test whether read/write error has occurred
• fflush: Flush buffered file output
• fgetc: Get a character from a file or stream
• fgetpos: Record position in a stream or file
• fgets: Get character string from a file or stream
• fiprintf: Write formatted output to file (integer only)
• fopen: Open a file
• fdopen: Turn an open file into a stream
• fputc: Write a character on a stream or file
• fputs: Write a character string in a file or stream
• fread: Read array elements from a file
• freopen: Open a file using an existing file descriptor
• fseek: Set file position
• fsetpos: Restore position of a stream or file
• ftell: Return position in a stream or file
• fwrite: Write array elements from memory to a file or stream
• getc: Get a character from a file or stream (macro)
• getchar: Get a character from standard input (macro)
• gets: Get character string from standard input (obsolete)
• iprintf: Write formatted output (integer only)
• mktemp: Generate unused file name
• perror: Print an error message on standard error
• putc: Write a character on a stream or file (macro)
• putchar: Write a character on standard output (macro)
• puts: Write a character string on standard output
• remove: Delete a file's name
• rename: Rename a file
• rewind: Reinitialize a file or stream
• setbuf: Specify full buffering for a file or stream
• setvbuf: Specify buffering for a file or stream
• siprintf: Write formatted output (integer only)
• printf: Write formatted output
• scanf: Scan and format input
• tmpfile: Create a temporary file
• tmpnam: Generate name for a temporary file
• vprintf: Format variable argument list