# 2.11BSD#431 - /usr/src/usr.bin/mesg.c

##### Functions

    error             X
    main              X
    newmode           X

##### Variables

    sbuf              X
    tty               X

       1: static char *sccsid = "@(#)mesg.c	4.3 (Berkeley) 3/13/86";
       2: /*
       3:  * mesg -- set current tty to accept or
       4:  *	forbid write permission.
       5:  *
       6:  *	mesg [y] [n]
       7:  *		y allow messages
       8:  *		n forbid messages
       9:  */
      10:
      11: #include <stdio.h>
      12: #include <sys/types.h>
      13: #include <sys/stat.h>
      14:
      15: struct stat sbuf;
      16:
      17: char *tty;
      18: char *ttyname();
      19:
      20: main(argc, argv)
      21: char *argv[];
      22: {
      23:     int r=0;
      24:     tty = ttyname(2);
      25:     if (tty == 0)
      26:         exit(13);
      27:     if(stat(tty, &sbuf) < 0) error("cannot stat");
      28:     if(argc < 2) {
      29:         if(sbuf.st_mode & 020)
      30:             fprintf(stderr,"is y\n");
      31:         else {  r=1;
      32:             fprintf(stderr,"is n\n");
      33:         }
      34:     } else  switch(*argv[1]) {
      35:         case 'y':
      36:             newmode(sbuf.st_mode|020); break;
      37:
      38:         case 'n':
      39:             newmode(sbuf.st_mode&~020); r=1; break;
      40:
      41:         default:
      42:             error("usage: mesg [y] [n]");
      43:         }
      44:     exit(r);
      45: }
      46:
      47: error(s)
      48: char *s;
      49: {
      50:     fprintf(stderr,"mesg: %s\n",s);
      51:     exit(-1);
      52: }
      53:
      54: newmode(m)
      55: {
      56:     if(chmod(tty,m)<0)
      57:         error("cannot change mode");
      58: }

#### Defined functions

error defined in line 47; used 3 times

- in line 27, 42, 57

main defined in line 20; never used
newmode defined in line 54; used 2 times

- in line 36-39(2)

#### Defined variables

sbuf defined in line 15; used 4 times

- in line 27-29(2), 36-39(2)

sccsid defined in line 1; never used
tty defined in line 17; used 4 times

- in line 24-27(3), 56

Last modified: 1987-02-17 Generated: 2016-12-26 | Generated by src2html V0.67 page hit count: 1009 |