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/*
* wserv.c - little program to be a pipe between a screen or
* xterm window to the calling ircII process.
*
* Copyright Troy Rollo, 1992.
*
* Finished by Matthew Green, 1993.
*
* Works by opening up the unix domain socket that ircII bind's
* before calling wserv, and which ircII also deleted after the
* connection has been made.
*/
#if 0
static char rcsid[] = "@(#)$Id: wserv.c,v 1.13 1994/07/02 02:32:13 mrg Exp $";
#endif
#include "defs.h"
#ifdef HAVE_SYS_UN_H
# include "irc.h"
# include "term.h"
# include <sys/un.h>
/*
* Holds the parent process id, as taken from the command line arguement.
* We can't use getppid() here, because the parent for screen is the
* underlying screen process, and for xterm's, it the xterm itself.
*/
static pid_t ircIIpid;
static int s;
/* sanity */
typedef struct sockaddr Sockaddr;
typedef struct sockaddr_un USockaddr;
void my_exit(int);
/* declare the signal handler */
# if !defined(_RT) && defined(SIGWINCH)
void got_sigwinch();
# endif /* _RT */
void ignore (int value);
#ifdef __STDC__
void main (int argc, char **argv)
#else
void
main(argc, argv)
int argc;
char **argv;
#endif
{
struct sockaddr_un my_addr, *addr = &my_addr;
int nread;
fd_set reads;
char *path,
*tmp;
char buffer[2];
/* Set up the signal hander to pass SIGWINCH to ircII */
# if !defined(_RT) && defined(SIGWINCH)
(void) MY_SIGNAL(SIGWINCH, got_sigwinch, 0);
# endif /* _RT */
(void) MY_SIGNAL(SIGINT, ignore, 0);
if (argc != 2) /* no socket is passed */
my_exit(1);
/*
* First thing we do here is grab the parent pid from the command
* line arguements, because getppid() returns the wrong pid in
* all cases.. is comes in via the command line arguement in the
* for of irc_xxxxxxxx .. as an 8 digit decimal number.. if we
* can't get the pid from the command line arg, then we set it
* to -1, which is used later to ignore them..
*/
path = (char *) malloc(strlen(argv[1]) + 1);
strcpy(path, argv[1]);
if ((tmp = (char *)index(path, '_')))
ircIIpid = atoi(++tmp);
else
ircIIpid = -1;
/*
* Set up the socket, from the path passed, connect it.. all that
* stuff.. And initalise the term settings for the window.
*/
addr->sun_family = AF_UNIX;
#ifdef SUN_LEN
/* addr->sun_len = strlen(path) + 1; */
#endif
strcpy(addr->sun_path, path);
s = socket(AF_UNIX, SOCK_STREAM, 0);
if (connect(s, (Sockaddr *) addr, sizeof(USockaddr)) < 0)
my_exit(23);
/*
* first line to for a wserv program is the tty. this is so ircii
* can grab the size of the tty, and have it changed.
*/
tmp = ttyname(0);
write(s, tmp, strlen(tmp));
write(s, "\n", 1);
term_init();
/*
* The select call.. reads from the socket, and from the window..
* and pipes the output from out to the other.. nice and simple
*/
while (1)
{
FD_ZERO(&reads);
FD_SET(0, &reads);
FD_SET(s, &reads);
select(s + 1, &reads, NULL, NULL, NULL);
if (FD_ISSET(0, &reads))
{
if (0 != (nread = read(0, buffer, sizeof(buffer))))
write(s, buffer, nread);
else
my_exit(3);
}
if (FD_ISSET(s, &reads))
{
if (0 != (nread = read(s, buffer, sizeof(buffer))))
write(1, buffer, nread);
else
my_exit(4);
}
}
my_exit(8);
}
/* got_sigwinch: we got a SIGWINCH, so we send it back to ircII */
# if !defined(_RT) && defined(SIGWINCH)
void
got_sigwinch _((void))
{
# ifdef SYSVSIGNALS
(void) MY_SIGNAL(SIGWINCH, got_sigwinch, 0);
# endif
if (-1 != ircIIpid)
kill(ircIIpid, SIGWINCH);
}
# endif /* _RT */
#else
void
main _((void))
{
my_exit(5);
}
#endif /* HAVE_SYS_UH_H */
void my_exit(int value)
{
printf("exiting with %d!\n", value);
printf("errno is %d (%s)\n", errno, sys_errlist[errno]);
exit(value);
}
void ignore (int value)
{
/* send a ^C */
char foo = 3;
write(s, &foo, 1);
}
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