Return to xcons.c CVS log

Up to [CSRG BSD Unix] / 43BSDTahoe / new / X / xcons

Annotation of 43BSDTahoe/new/X/xcons/xcons.c, revision 1.1.1.1

1.1       root        1: #include <X/mit-copyright.h>
                      2: /* Copyright 1986, Massachusetts Institute of Technology */
                      3: 
                      4: #ifndef lint
                      5: static char *rcsid_xcons_c = "$Header: xcons.c,v 10.1 86/02/02 13:10:50 jg Rel $";
                      6: #endif lint
                      7: 
                      8: #include <stdio.h>
                      9: #include <fcntl.h>
                     10: #include <sys/ioctl.h>
                     11: #include <sys/errno.h>
                     12: 
                     13: extern int errno;
                     14: 
                     15: main(argc, argv)
                     16:     int argc;
                     17:     char **argv;
                     18: {
                     19:        char fromdev[30], todev[30];
                     20:        int from, to, n;
                     21:        char buf[2048];
                     22: 
                     23:        if (argc != 3)
                     24:                exit(1);
                     25:        strcpy(fromdev, "/dev/");
                     26:        strcat(fromdev, argv[2]);
                     27:        strcpy(todev, "/dev/");
                     28:        strcat(todev, argv[1]);
                     29:        if (argc != 3 || (from = open(fromdev, O_RDONLY, 0)) < 0)
                     30:                exit(1);
                     31:        while (1) {
                     32:                if ((n = read(from, buf, sizeof(buf))) <= 0)
                     33:                        exit(1);
                     34:                if (fcntl(from, F_SETFL, FNDELAY) < 0)
                     35:                        exit(1);
                     36:                /* we only open the tty when we need to, because it won't
                     37:                 * be preserved across logins */
                     38:                if ((to = open(todev, O_WRONLY, 0)) < 0)
                     39:                        exit(1);
                     40:                while (n > 0) {
                     41:                        write(to, buf, n);
                     42:                        n = read(from, buf, n);
                     43:                }
                     44:                close(to);
                     45:                if (errno != EWOULDBLOCK || fcntl(from, F_SETFL, 0) < 0)
                     46:                        exit(1);
                     47:        }
                     48: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.