squish-unix.c File Reference

#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <termios.h>
#include <unistd.h>

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Macros
#define	_GNU_SOURCE   1

Functions
static void	fail_io (const char *msg,...)
	Prints MSG, formatting as with printf(), plus an error message based on errno, and exits. More...
static void	make_noncanon (int fd, int vmin, int vtime)
	If FD is a terminal, configures it for noncanonical input mode with VMIN and VTIME set as indicated. More...
static void	make_nonblocking (int fd, bool nonblocking)
	Make FD non-blocking if NONBLOCKING is true, or blocking if NONBLOCKING is false. More...
static bool	handle_error (ssize_t retval, int *fd, bool fd_is_sock, const char *call)
	Handle a read or write on *FD, which is the socket if FD_IS_SOCK is true, that returned end-of-file or error indication RETVAL. More...
static void	relay (int sock)
	Copies data from stdin to SOCK and from SOCK to stdout until no more data can be read or written. More...
static void	sigchld_handler (int signo __attribute__((unused)))
int	main (int argc __attribute__((unused)), char *argv[])

Macro Definition Documentation

_GNU_SOURCE

#define _GNU_SOURCE   1

Definition at line 1 of file squish-unix.c.

Function Documentation

fail_io()

static void static void fail_io ( const char *  msg,   ...  )

static

Prints MSG, formatting as with printf(), plus an error message based on errno, and exits.

Definition at line 31 of file squish-unix.c.

References exit(), EXIT_FAILURE, msg(), va_end, and va_start.

Referenced by handle_error(), main(), make_nonblocking(), make_noncanon(), and relay().

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handle_error()

static bool handle_error ( ssize_t  retval, int *  fd, bool  fd_is_sock, const char *  call  )

static

Handle a read or write on *FD, which is the socket if FD_IS_SOCK is true, that returned end-of-file or error indication RETVAL.

The system call is named CALL, for use in error messages. Returns true if processing may continue, false if we're all done.

Definition at line 86 of file squish-unix.c.

References fail_io().

Referenced by relay().

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main()

int main	(	int argc	__attribute__(unused),
		char *	argv[]
	)

Definition at line 241 of file squish-unix.c.

References close(), EXIT_FAILURE, fail_io(), make_nonblocking(), memset(), NULL, offsetof, relay(), sigchld_handler(), signal(), strlen(), and strncpy.

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make_nonblocking()

static void make_nonblocking ( int  fd, bool  nonblocking  )

static

Make FD non-blocking if NONBLOCKING is true, or blocking if NONBLOCKING is false.

Definition at line 67 of file squish-unix.c.

References fail_io().

Referenced by main(), and relay().

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make_noncanon()

static void make_noncanon ( int  fd, int  vmin, int  vtime  )

static

If FD is a terminal, configures it for noncanonical input mode with VMIN and VTIME set as indicated.

If FD is not a terminal, has no effect.

Definition at line 49 of file squish-unix.c.

References fail_io().

Referenced by relay().

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relay()

static void relay ( int  sock )

static

Copies data from stdin to SOCK and from SOCK to stdout until no more data can be read or written.

Definition at line 105 of file squish-unix.c.

References buf, exit(), fail_io(), handle_error(), make_nonblocking(), make_noncanon(), memmove(), memset(), NULL, read(), STDIN_FILENO, STDOUT_FILENO, and write().

Referenced by main().

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sigchld_handler()

static void sigchld_handler ( int signo   __attribute__(unused) )

static

Definition at line 235 of file squish-unix.c.

Referenced by main().

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