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#define _WITH_GETLINE
36#include <stdio.h>
37#include <stdlib.h>
38#include <string.h>
39#include <stringlist.h>
40#include <unistd.h>
41
42#define C_OPTION 0x1
43
44static StringList *includes;
45
46static void
47usage(void)
48{
49
50	fprintf(stderr, "usage: soelim [-Crtv] [-I dir] [files]\n");
51
52	exit(EXIT_FAILURE);
53}
54
55static FILE *
56soelim_fopen(const char *name)
57{
58	FILE *f;
59	char path[PATH_MAX];
60	size_t i;
61
62	if (strcmp(name, "-") == 0)
63		return (stdin);
64
65	if ((f = fopen(name, "r")) != NULL)
66		return (f);
67
68	if (*name == '/') {
69		warn("can't open '%s'", name);
70		return (NULL);
71	}
72
73	for (i = 0; i < includes->sl_cur; i++) {
74		snprintf(path, sizeof(path), "%s/%s", includes->sl_str[i],
75		    name);
76		if ((f = fopen(path, "r")) != NULL)
77			return (f);
78	}
79
80	warn("can't open '%s'", name);
81
82	return (f);
83}
84
85static int
86soelim_file(FILE *f, int flag)
87{
88	char *line = NULL;
89	char *walk, *cp;
90	size_t linecap = 0;
91	ssize_t linelen;
92
93	if (f == NULL)
94		return (1);
95
96	while ((linelen = getline(&line, &linecap, f)) > 0) {
97		if (strncmp(line, ".so", 3) != 0) {
98			printf("%s", line);
99			continue;
100		}
101
102		walk = line + 3;
103		if (!isspace(*walk) && ((flag & C_OPTION) == 0)) {
104			printf("%s", line);
105			continue;
106		}
107
108		while (isspace(*walk))
109			walk++;
110
111		cp = walk;
112		while (*cp != '\0' && !isspace(*cp))
113			cp++;
114		*cp = 0;
115		if (cp < line + linelen)
116			cp++;
117
118		if (*walk == '\0') {
119			printf("%s", line);
120			continue;
121		}
122		if (soelim_file(soelim_fopen(walk), flag) == 1) {
123			free(line);
124			return (1);
125		}
126		if (*cp != '\0')
127			printf("%s", cp);
128	}
129
130	free(line);
131	fclose(f);
132
133	return (0);
134}
135
136int
137main(int argc, char **argv)
138{
139	int ch, i;
140	int ret = 0;
141	int flags = 0;
142
143	includes = sl_init();
144	if (includes == NULL)
145		err(EXIT_FAILURE, "sl_init()");
146
147	while ((ch = getopt(argc, argv, "CrtvI:")) != -1) {
148		switch (ch) {
149		case 'C':
150			flags |= C_OPTION;
151			break;
152		case 'r':
153		case 'v':
154		case 't':
155			/* stub compatibility with groff's soelim */
156			break;
157		case 'I':
158			sl_add(includes, optarg);
159			break;
160		default:
161			sl_free(includes, 0);
162			usage();
163		}
164	}
165
166	argc -= optind;
167	argv += optind;
168
169	if (argc == 0)
170		ret = soelim_file(stdin, flags);
171
172	for (i = 0; i < argc; i++)
173		ret = soelim_file(soelim_fopen(argv[i]), flags);
174
175	sl_free(includes, 0);
176
177	return (ret);
178}
179