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2 nishi 1 
/* $Id: cgi.c 7 2024-09-11 15:46:04Z nishi $ */
2 
 
3 
#include "../config.h"
4 
 
5 
#include "kn_cgi.h"
6 
 
6 nishi 7 
#include <dirent.h>
2 nishi 8 
#include <stdlib.h>
9 
#include <string.h>
10 
#include <stdbool.h>
6 nishi 11 
#include <sys/stat.h>
2 nishi 12 
#include <stdio.h>
13 
 
14 
#include "kn_version.h"
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#include "kn_util.h"
4 nishi 16 
#include "kn_man.h"
2 nishi 17 
 
18 
struct q_entry {
19 
	char* key;
20 
	char* value;
21 
};
22 
 
23 
bool no = false;
24 
bool showmain = false;
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struct q_entry** entries = NULL;
4 nishi 26 
char* path;
2 nishi 27 
 
4 nishi 28 
char* kn_get_query(const char* key) {
2 nishi 29 
	if(entries == NULL) return NULL;
30 
	int i;
4 nishi 31 
	for(i = 0; entries[i] != NULL; i++) {
32 
		if(strcmp(entries[i]->key, key) == 0) return entries[i]->value;
2 nishi 33 
	}
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	return NULL;
35 
}
36 
 
4 nishi 37 
char* kn_null(const char* a) { return a == NULL ? "" : (char*)a; }
2 nishi 38 
 
6 nishi 39 
void manpage_scan(const char* root) {
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	struct dirent** nl;
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	int n = scandir(root, &nl, NULL, alphasort);
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	if(n < 0) return;
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	int i;
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	for(i = 0; i < n; i++) {
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		if(strcmp(nl[i]->d_name, ".") != 0 && strcmp(nl[i]->d_name, "..") != 0) {
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			char* path = kn_strcat3(root, "/", nl[i]->d_name);
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			struct stat s;
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			if(stat(path, &s) == 0) {
49 
				if(S_ISDIR(s.st_mode)) {
50 
					manpage_scan(path);
51 
				} else {
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					char* name = kn_strdup(nl[i]->d_name);
7 nishi 53 
					char* desc = kn_strdup("&lt;No description detected&gt;");
6 nishi 54 
 
55 
					int incr = 0;
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					FILE* f = fopen(path, "r");
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					char* b = malloc(s.st_size + 1);
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					b[s.st_size] = 0;
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					fread(b, s.st_size, 1, f);
60 
					fclose(f);
61 
 
62 
					int j;
7 nishi 63 
					for(j = 0;; j++) {
64 
						if(b[j] == '\n' || b[j] == 0) {
6 nishi 65 
							char* line = malloc(j - incr + 1);
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							line[j - incr] = 0;
67 
							memcpy(line, b + incr, j - incr);
68 
 
69 
							int k;
7 nishi 70 
							for(k = 0; line[k] != 0 && k < 4; k++) {
71 
								if(line[k] == ' ') {
6 nishi 72 
									line[k] = 0;
7 nishi 73 
									if(strcasecmp(line, ".Nd") == 0) {
6 nishi 74 
										free(desc);
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										desc = kn_strdup(line + k + 1);
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										int l;
7 nishi 77 
										for(l = 0; desc[l] != 0; l++) {
78 
											if(desc[l] == '\\') {
6 nishi 79 
												l++;
7 nishi 80 
												if(desc[l] == '"') {
6 nishi 81 
													l--;
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													desc[l] = 0;
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													break;
84 
												}
85 
											}
86 
										}
87 
									}
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									break;
89 
								}
90 
							}
91 
 
92 
							free(line);
93 
							incr = j + 1;
94 
							if(b[j] == 0) break;
95 
						}
96 
					}
97 
 
98 
					free(b);
99 
 
7 nishi 100 
					if(strlen(desc) > 70) {
6 nishi 101 
						desc[70] = 0;
102 
						desc[69] = '.';
103 
						desc[68] = '.';
104 
						desc[67] = '.';
105 
					}
106 
 
107 
					printf("<tr>\n");
108 
					printf("	<td><a href=\"?page=%s\">%s</a></td>\n", name, name);
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					printf("	<td><code>%s</code></td>\n", desc);
110 
					printf("</tr>\n");
111 
 
112 
					free(name);
113 
					free(desc);
114 
				}
115 
			}
116 
			free(path);
117 
		}
118 
		free(nl[i]);
119 
	}
120 
	free(nl);
121 
}
122 
 
123 
void list_manpages(void) {
124 
#ifdef MANPAGE_DIRS
125 
	int i;
126 
	const char* dirs[] = MANPAGE_DIRS;
7 nishi 127 
	for(i = 0; i < sizeof(dirs) / sizeof(*dirs); i++) {
6 nishi 128 
		manpage_scan(dirs[i]);
129 
	}
130 
#else
131 
	manpage_scan(MANPAGE_DIR);
132 
#endif
133 
}
134 
 
4 nishi 135 
void kn_parse_query(void) {
2 nishi 136 
	char* query = getenv("QUERY_STRING");
4 nishi 137 
	if(query != NULL) {
2 nishi 138 
		entries = malloc(sizeof(*entries));
139 
		entries[0] = NULL;
140 
		int i;
141 
		int incr = 0;
4 nishi 142 
		for(i = 0;; i++) {
143 
			if(query[i] == 0 || query[i] == '&') {
2 nishi 144 
				char* a = malloc(i - incr + 1);
4 nishi 145 
				memcpy(a, query + incr, i - incr);
2 nishi 146 
				a[i - incr] = 0;
147 
 
148 
				char* key = a;
149 
				char* value = "";
150 
 
151 
				int j;
4 nishi 152 
				for(j = 0; key[j] != 0; j++) {
153 
					if(key[j] == '=') {
2 nishi 154 
						key[j] = 0;
155 
						value = key + j + 1;
156 
						break;
157 
					}
158 
				}
159 
 
160 
				struct q_entry* e = malloc(sizeof(*e));
161 
				e->key = kn_strdup(key);
162 
				e->value = kn_strdup(value);
163 
 
164 
				struct q_entry** old = entries;
4 nishi 165 
				for(j = 0; old[j] != NULL; j++)
166 
					;
2 nishi 167 
				entries = malloc(sizeof(*entries) * (j + 2));
168 
				for(j = 0; old[j] != NULL; j++) entries[j] = old[j];
169 
				entries[j] = e;
170 
				entries[j + 1] = NULL;
171 
				free(old);
172 
 
173 
				free(a);
174 
 
175 
				incr = i + 1;
176 
				if(query[i] == 0) break;
177 
			}
178 
		}
179 
	}
4 nishi 180 
	if(kn_get_query("page") == NULL) {
2 nishi 181 
		printf("Status: 200 OK\n\n");
182 
		showmain = true;
4 nishi 183 
	} else {
6 nishi 184 
		bool cond = false;
185 
#ifdef MANPAGE_DIRS
186 
		int i;
187 
		const char* dirs[] = MANPAGE_DIRS;
7 nishi 188 
		for(i = 0; i < sizeof(dirs) / sizeof(*dirs); i++) {
6 nishi 189 
			cond = (path = kn_find(dirs[i], kn_get_query("page"))) != NULL;
190 
			if(cond) break;
191 
		}
192 
#else
193 
		cond = (path = kn_find(MANPAGE_DIR, kn_get_query("page"))) != NULL;
194 
#endif
195 
		if(cond) {
4 nishi 196 
			printf("Status: 200 OK\n\n");
197 
		} else {
198 
			printf("Status: 404 Not Found\n\n");
199 
			no = true;
200 
		}
2 nishi 201 
	}
202 
}
203 
 
4 nishi 204 
void kn_cgi(void) {
2 nishi 205 
	printf("<html>\n");
206 
	printf("	<head>\n");
207 
	printf("		<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\">\n");
208 
	printf("		<title>Keine - ");
4 nishi 209 
	if(no) {
2 nishi 210 
		printf("Not found");
4 nishi 211 
	} else if(showmain) {
2 nishi 212 
		printf("Main");
4 nishi 213 
	} else {
214 
		printf("%s", kn_get_query("page"));
2 nishi 215 
	}
216 
	printf("</title>\n");
217 
	printf("		<style>\n");
218 
	printf("html {\n");
219 
	printf("	background-color: #222222;\n");
220 
	printf("	color: #ffffff;\n");
221 
	printf("}\n");
222 
	printf("body {\n");
223 
	printf("	width: 900px;\n");
224 
	printf("	margin: 0 auto;\n");
225 
	printf("}\n");
226 
	printf("a:link {\n");
227 
	printf("	color: #88f;\n");
228 
	printf("}\n");
229 
	printf("a:visited {\n");
230 
	printf("	color: #44b;\n");
231 
	printf("}\n");
232 
	printf("		</style>\n");
233 
	printf("	</head>\n");
234 
	printf("	<body>\n");
235 
	printf("		<div style=\"text-align: center;\">\n");
236 
	printf("			<form action=\"%s%s\">\n", getenv("SCRIPT_NAME"), kn_null(getenv("PATH_INFO")));
237 
	printf("				<a href=\"%s%s\">Main</a> | ", getenv("SCRIPT_NAME"), kn_null(getenv("PATH_INFO")));
6 nishi 238 
	printf("				Name: <input name=\"page\"%s%s%s>\n", kn_get_query("page") == NULL ? "" : " value=\"", kn_get_query("page") == NULL ? "" : kn_get_query("page"), kn_get_query("page") == NULL ? "" : "\"");
2 nishi 239 
	printf("				<input type=\"submit\">\n");
240 
	printf("			</form>\n");
241 
	printf("		</div>\n");
242 
	printf("		<hr>\n");
4 nishi 243 
	if(no) {
2 nishi 244 
		printf("		Not found.\n");
4 nishi 245 
	} else if(showmain) {
6 nishi 246 
#ifdef MAIN_HTML
4 nishi 247 
		printf("%s", MAIN_HTML);
6 nishi 248 
#else
249 
		printf("<h1>Index</h1>\n");
250 
		printf("<table border=\"0\" style=\"width: 900px;\">\n");
251 
		printf("	<tr>\n");
252 
		printf("		<th style=\"width: 50px;\">Name</th>\n");
253 
		printf("		<th>Description</th>\n");
254 
		printf("	</tr>\n");
255 
		list_manpages();
256 
		printf("</table>\n");
257 
#endif
4 nishi 258 
	} else {
259 
		printf("<pre>");
260 
		char* c = kn_manpage_process(path);
261 
		if(c != NULL) {
262 
			printf("%s", c);
263 
			free(c);
264 
		}
265 
		printf("</pre>\n");
2 nishi 266 
	}
267 
	printf("		<hr>\n");
5 nishi 268 
#ifdef FOOTER_HTML
269 
	printf("%s\n", FOOTER_HTML);
270 
	printf("		<hr>\n");
271 
#endif
4 nishi 272 
	printf("		<i>Generated by <a href=\"http://nishi.boats/keine\">Keine</a> %s</i>\n", kn_get_version());
2 nishi 273 
	printf("	</body>\n");
274 
	printf("</html>\n");
4 nishi 275 
	if(path != NULL) free(path);
2 nishi 276 
}