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/types.h>
28
29#include <ctype.h>
30#include <err.h>
31#include <limits.h>
32#include <stdio.h>
33#include <stdlib.h>
34#include <string.h>
35#include <stringlist.h>
36#include <unistd.h>
37
38#define C_OPTION 0x1
39
40static StringList *includes;
41
42static void
43usage(void)
44{
45
46	fprintf(stderr, "usage: soelim [-Crtv] [-I dir] [files]\n");
47
48	exit(EXIT_FAILURE);
49}
50
51static FILE *
52soelim_fopen(const char *name)
53{
54	FILE *f;
55	char path[PATH_MAX];
56	size_t i;
57
58	if (strcmp(name, "-") == 0)
59		return (stdin);
60
61	if ((f = fopen(name, "r")) != NULL)
62		return (f);
63
64	if (*name == '/') {
65		warn("can't open '%s'", name);
66		return (NULL);
67	}
68
69	for (i = 0; i < includes->sl_cur; i++) {
70		snprintf(path, sizeof(path), "%s/%s", includes->sl_str[i],
71		    name);
72		if ((f = fopen(path, "r")) != NULL)
73			return (f);
74	}
75
76	warn("can't open '%s'", name);
77
78	return (f);
79}
80
81static int
82soelim_file(FILE *f, int flag)
83{
84	char *line = NULL;
85	char *walk, *cp;
86	size_t linecap = 0;
87	ssize_t linelen;
88
89	if (f == NULL)
90		return (1);
91
92	while ((linelen = getline(&line, &linecap, f)) > 0) {
93		if (strncmp(line, ".so", 3) != 0) {
94			printf("%s", line);
95			continue;
96		}
97
98		walk = line + 3;
99		if (!isspace(*walk) && ((flag & C_OPTION) == 0)) {
100			printf("%s", line);
101			continue;
102		}
103
104		while (isspace(*walk))
105			walk++;
106
107		cp = walk;
108		while (*cp != '\0' && !isspace(*cp))
109			cp++;
110		*cp = 0;
111		if (cp < line + linelen)
112			cp++;
113
114		if (*walk == '\0') {
115			printf("%s", line);
116			continue;
117		}
118		if (soelim_file(soelim_fopen(walk), flag) == 1) {
119			free(line);
120			return (1);
121		}
122		if (*cp != '\0')
123			printf("%s", cp);
124	}
125
126	free(line);
127	fclose(f);
128
129	return (0);
130}
131
132int
133main(int argc, char **argv)
134{
135	int ch, i;
136	int ret = 0;
137	int flags = 0;
138
139	includes = sl_init();
140	if (includes == NULL)
141		err(EXIT_FAILURE, "sl_init()");
142
143	while ((ch = getopt(argc, argv, "CrtvI:")) != -1) {
144		switch (ch) {
145		case 'C':
146			flags |= C_OPTION;
147			break;
148		case 'r':
149		case 'v':
150		case 't':
151			/* stub compatibility with groff's soelim */
152			break;
153		case 'I':
154			sl_add(includes, optarg);
155			break;
156		default:
157			sl_free(includes, 0);
158			usage();
159		}
160	}
161
162	argc -= optind;
163	argv += optind;
164
165	if (argc == 0)
166		ret = soelim_file(stdin, flags);
167
168	for (i = 0; i < argc; i++)
169		ret = soelim_file(soelim_fopen(argv[i]), flags);
170
171	sl_free(includes, 0);
172
173	return (ret);
174}
175