BSD 4_3_Net_2 release

[unix-history] / usr / src / usr.bin / soelim / soelim.c

/*
* Copyright (c) 1980 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980 The Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)soelim.c    5.3 (Berkeley) 6/1/90";
#endif /* not lint */

#include <stdio.h>
/*
* soelim - a filter to process n/troff input eliminating .so's
*
* Author: Bill Joy UCB July 8, 1977
*
* This program eliminates .so's from a n/troff input stream.
* It can be used to prepare safe input for submission to the
* phototypesetter since the software supporting the operator
* doesn't let him do chdir.
*
* This is a kludge and the operator should be given the
* ability to do chdir.
*
* This program is more generally useful, it turns out, because
* the program tbl doesn't understand ".so" directives.
*/
#define STDIN_NAME      "-"

main(argc, argv)
       int argc;
       char *argv[];
{

       argc--;
       argv++;
       if (argc == 0) {
               (void)process(STDIN_NAME);
               exit(0);
       }
       do {
               (void)process(argv[0]);
               argv++;
               argc--;
       } while (argc > 0);
       exit(0);
}

int process(file)
       char *file;
{
       register char *cp;
       register int c;
       char fname[BUFSIZ];
       FILE *soee;
       int isfile;

       if (!strcmp(file, STDIN_NAME)) {
               soee = stdin;
       } else {
               soee = fopen(file, "r");
               if (soee == NULL) {
                       perror(file);
                       return(-1);
               }
       }
       for (;;) {
               c = getc(soee);
               if (c == EOF)
                       break;
               if (c != '.')
                       goto simple;
               c = getc(soee);
               if (c != 's') {
                       putchar('.');
                       goto simple;
               }
               c = getc(soee);
               if (c != 'o') {
                       printf(".s");
                       goto simple;
               }
               do
                       c = getc(soee);
               while (c == ' ' || c == '\t');
               cp = fname;
               isfile = 0;
               for (;;) {
                       switch (c) {

                       case ' ':
                       case '\t':
                       case '\n':
                       case EOF:
                               goto donename;

                       default:
                               *cp++ = c;
                               c = getc(soee);
                               isfile++;
                               continue;
                       }
               }
donename:
               if (cp == fname) {
                       printf(".so");
                       goto simple;
               }
               *cp = 0;
               if (process(fname) < 0)
                       if (isfile)
                               printf(".so %s\n", fname);
               continue;
simple:
               if (c == EOF)
                       break;
               putchar(c);
               if (c != '\n') {
                       c = getc(soee);
                       goto simple;
               }
       }
       if (soee != stdin) {
               fclose(soee);
       }
       return(0);
}