79 lines
1.7 KiB
C
79 lines
1.7 KiB
C
/*
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* TNET A server program for MINIX which implements the TCP/IP
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* suite of networking protocols. It is based on the
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* TCP/IP code written by Phil Karn et al, as found in
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* his NET package for Packet Radio communications.
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*
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* Handle the allocation of a PTY.
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*
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* Author: Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
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*/
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#include <sys/types.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdio.h>
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#include "telnetd.h"
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#define DEV_DIR "/dev"
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/*
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* Allocate a PTY, by trying to open one repeatedly,
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* until all PTY channels are done. If at that point
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* no PTY is found, go into panic mode :-(
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*/
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int get_pty(pty_fdp, tty_namep)
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int *pty_fdp;
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char **tty_namep;
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{
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char buff[128], temp[128];
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register int i, j;
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int pty_fd;
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static char tty_name[128];
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for(i = 'p'; i < 'w'; i++) {
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j = 0;
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do {
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sprintf(buff, "%s/pty%c%c",
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DEV_DIR, i, (j < 10) ? j + '0' : j + 'a' - 10);
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if (opt_d == 1) {
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(void) write(2, "Testing: ", 9);
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(void) write(2, buff, strlen(buff));
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(void) write(2, "...: ", 5);
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}
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pty_fd = open(buff, O_RDWR);
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if (opt_d == 1) {
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if (pty_fd < 0) sprintf(temp, "error %d\r\n", errno);
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else sprintf(temp, "OK\r\n");
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(void) write(2, temp, strlen(temp));
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}
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if (pty_fd >= 0) break;
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j++;
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if (j == 16) break;
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} while(1);
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/* Did we find one? */
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if (j < 16) break;
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}
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if (pty_fd < 0) return(-1);
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if (opt_d == 1) {
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sprintf(temp, "File %s, desc %d\n", buff, pty_fd);
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(void) write(1, temp, strlen(temp));
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}
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sprintf(tty_name, "%s/tty%c%c", DEV_DIR,
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i, (j < 10) ? j + '0' : j + 'a' - 10);
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*pty_fdp = pty_fd;
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*tty_namep = tty_name;
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return(0);
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}
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