1/*-
2 * Copyright (c) 2014 Baptiste Daroussin <bapt@FreeBSD.org>
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 *    in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include <sys/types.h>
31
32#include <ctype.h>
33#include <err.h>
34#include <limits.h>
35#include <stdio.h>
36#include <stdlib.h>
37#include <string.h>
38#include <stringlist.h>
39#include <unistd.h>
40
41#define C_OPTION 0x1
42
43static StringList *includes;
44
45static void
46usage(void)
47{
48
49	fprintf(stderr, "usage: soelim [-Crtv] [-I dir] [files]\n");
50
51	exit(EXIT_FAILURE);
52}
53
54static FILE *
55soelim_fopen(const char *name)
56{
57	FILE *f;
58	char path[PATH_MAX];
59	size_t i;
60
61	if (strcmp(name, "-") == 0)
62		return (stdin);
63
64	if ((f = fopen(name, "r")) != NULL)
65		return (f);
66
67	if (*name == '/') {
68		warn("can't open '%s'", name);
69		return (NULL);
70	}
71
72	for (i = 0; i < includes->sl_cur; i++) {
73		snprintf(path, sizeof(path), "%s/%s", includes->sl_str[i],
74		    name);
75		if ((f = fopen(path, "r")) != NULL)
76			return (f);
77	}
78
79	warn("can't open '%s'", name);
80
81	return (f);
82}
83
84static int
85soelim_file(FILE *f, int flag)
86{
87	char *line = NULL;
88	char *walk, *cp;
89	size_t linecap = 0;
90	ssize_t linelen;
91
92	if (f == NULL)
93		return (1);
94
95	while ((linelen = getline(&line, &linecap, f)) > 0) {
96		if (strncmp(line, ".so", 3) != 0) {
97			printf("%s", line);
98			continue;
99		}
100
101		walk = line + 3;
102		if (!isspace(*walk) && ((flag & C_OPTION) == 0)) {
103			printf("%s", line);
104			continue;
105		}
106
107		while (isspace(*walk))
108			walk++;
109
110		cp = walk;
111		while (*cp != '\0' && !isspace(*cp))
112			cp++;
113		*cp = 0;
114		if (cp < line + linelen)
115			cp++;
116
117		if (*walk == '\0') {
118			printf("%s", line);
119			continue;
120		}
121		if (soelim_file(soelim_fopen(walk), flag) == 1) {
122			free(line);
123			return (1);
124		}
125		if (*cp != '\0')
126			printf("%s", cp);
127	}
128
129	free(line);
130	fclose(f);
131
132	return (0);
133}
134
135int
136main(int argc, char **argv)
137{
138	int ch, i;
139	int ret = 0;
140	int flags = 0;
141
142	includes = sl_init();
143	if (includes == NULL)
144		err(EXIT_FAILURE, "sl_init()");
145
146	while ((ch = getopt(argc, argv, "CrtvI:")) != -1) {
147		switch (ch) {
148		case 'C':
149			flags |= C_OPTION;
150			break;
151		case 'r':
152		case 'v':
153		case 't':
154			/* stub compatibility with groff's soelim */
155			break;
156		case 'I':
157			sl_add(includes, optarg);
158			break;
159		default:
160			sl_free(includes, 0);
161			usage();
162		}
163	}
164
165	argc -= optind;
166	argv += optind;
167
168	if (argc == 0)
169		ret = soelim_file(stdin, flags);
170
171	for (i = 0; i < argc; i++)
172		ret = soelim_file(soelim_fopen(argv[i]), flags);
173
174	sl_free(includes, 0);
175
176	return (ret);
177}
178