doit.c

/*
** doit.c for zssh
**
** Made by Matthieu Lucotte
** Login   <gounter@users.sourceforge.net>
**
** Started on  Thu Jun 29 19:09:23 2000 Matthieu Lucotte
** Last update Tue Oct  2 22:00:18 2001 Matthieu Lucotte
*/

#include "zssh.h"

/* copy input to the pty, test for escape key and
 * switch to local shell mode if it found
 */
void doinput(void)
{
	ssize_t cc;
	unsigned char ibuf[BUFSIZ];

	signal(SIGINT, sigint_handler);
	siginterrupt(SIGINT, 1);
	signal(SIGWINCH, sigwinch_handler);
	while (1) {
		read_input(&cc, ibuf); /* read from stdin */
		if (cc <= 0)
			continue;

		if (escape_input(&cc, ibuf)) /* check for ^@ */
			rz_mode();
		else
			write(gl_master, ibuf, cc); /* write to pty master */
	}
	error("Should not be reached", ""); /* not reached */
}

/* copy output from the pty, suspended in rz_mode() */
void dooutput(void)
{
	ssize_t cc;
	char obuf[BUFSIZ];

#ifdef DEBUG
	printf("child_output: %i\n", (int)getpid());
#endif
	signal(SIGTSTP, SIG_IGN);
	signal(SIGINT, SIG_IGN);
	close(0);
	close(gl_slave);
	if (gl_copty) {
		close(gl_hook_master);
		close(gl_hook_slave);
	}
	while (1) {
		cc = read(gl_master, obuf, sizeof(obuf)); /* read from pty master */
		if (cc <= 0)
			continue;

		write(1, obuf, cc); /* write to stdout */
	}
	error("Should not be reached", ""); /* not reached */
}

/* Launch the remote shell.
 * shav defaults to [ "ssh" "-e" "none"  ] (zssh)
 */
void doshell(int ac, char **av, char **shav)
{
	char  **argv;
	int i, j;

#ifdef DEBUG
	printf("child_shell: %i\n", (int)getpid());
#endif
	initslave();
	printf("\n");
	for (i = 0; shav[i]; i++)
		;
	i += ac + 1;
	argv = smalloc(i * sizeof(char *));
	for (i = 0; shav[i]; i++)
		argv[i] = shav[i];
	for (j = 1; j < ac; j++)
		argv[i++] = av[j];
	argv[i] = 0;
#ifdef DEBUG
	printf("launching shell: ");
	for (i = 0; argv[i]; i++)
		printf("[%s] ", argv[i]);
	printf("\n");
#endif
	execvp(shav[0], argv);
	error("execvp %s\n", shav[0]);
	fail();
}