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soelim.c revision 1.2 
      1 /*
      2  * Copyright (c) 1980 The Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 char copyright[] =
     36 "@(#) Copyright (c) 1980 The Regents of the University of California.\n\
     37  All rights reserved.\n";
     38 #endif /* not lint */
     39 
     40 #ifndef lint
     41 /*static char sccsid[] = "from: @(#)soelim.c	5.3 (Berkeley) 6/1/90";*/
     42 static char rcsid[] = "$Id: soelim.c,v 1.2 1993/08/01 18:08:23 mycroft Exp $";
     43 #endif /* not lint */
     44 
     45 #include <stdio.h>
     46 /*
     47  * soelim - a filter to process n/troff input eliminating .so's
     48  *
     49  * Author: Bill Joy UCB July 8, 1977
     50  *
     51  * This program eliminates .so's from a n/troff input stream.
     52  * It can be used to prepare safe input for submission to the
     53  * phototypesetter since the software supporting the operator
     54  * doesn't let him do chdir.
     55  *
     56  * This is a kludge and the operator should be given the
     57  * ability to do chdir.
     58  *
     59  * This program is more generally useful, it turns out, because
     60  * the program tbl doesn't understand ".so" directives.
     61  */
     62 #define	STDIN_NAME	"-"
     63 
     64 main(argc, argv)
     65 	int argc;
     66 	char *argv[];
     67 {
     68 
     69 	argc--;
     70 	argv++;
     71 	if (argc == 0) {
     72 		(void)process(STDIN_NAME);
     73 		exit(0);
     74 	}
     75 	do {
     76 		(void)process(argv[0]);
     77 		argv++;
     78 		argc--;
     79 	} while (argc > 0);
     80 	exit(0);
     81 }
     82 
     83 int process(file)
     84 	char *file;
     85 {
     86 	register char *cp;
     87 	register int c;
     88 	char fname[BUFSIZ];
     89 	FILE *soee;
     90 	int isfile;
     91 
     92 	if (!strcmp(file, STDIN_NAME)) {
     93 		soee = stdin;
     94 	} else {
     95 		soee = fopen(file, "r");
     96 		if (soee == NULL) {
     97 			perror(file);
     98 			return(-1);
     99 		}
    100 	}
    101 	for (;;) {
    102 		c = getc(soee);
    103 		if (c == EOF)
    104 			break;
    105 		if (c != '.')
    106 			goto simple;
    107 		c = getc(soee);
    108 		if (c != 's') {
    109 			putchar('.');
    110 			goto simple;
    111 		}
    112 		c = getc(soee);
    113 		if (c != 'o') {
    114 			printf(".s");
    115 			goto simple;
    116 		}
    117 		do
    118 			c = getc(soee);
    119 		while (c == ' ' || c == '\t');
    120 		cp = fname;
    121 		isfile = 0;
    122 		for (;;) {
    123 			switch (c) {
    124 
    125 			case ' ':
    126 			case '\t':
    127 			case '\n':
    128 			case EOF:
    129 				goto donename;
    130 
    131 			default:
    132 				*cp++ = c;
    133 				c = getc(soee);
    134 				isfile++;
    135 				continue;
    136 			}
    137 		}
    138 donename:
    139 		if (cp == fname) {
    140 			printf(".so");
    141 			goto simple;
    142 		}
    143 		*cp = 0;
    144 		if (process(fname) < 0)
    145 			if (isfile)
    146 				printf(".so %s\n", fname);
    147 		continue;
    148 simple:
    149 		if (c == EOF)
    150 			break;
    151 		putchar(c);
    152 		if (c != '\n') {
    153 			c = getc(soee);
    154 			goto simple;
    155 		}
    156 	}
    157 	if (soee != stdin) {
    158 		fclose(soee);
    159 	}
    160 	return(0);
    161 }
    162