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10 nishi 1 
/* $Id: repo.c 16 2024-08-21 15:39:47Z nishi $ */
2 
 
3 
#include "rv_repo.h"
11 nishi 4 
 
5 
#include "../config.h"
6 
 
7 
#include "rv_util.h"
8 
 
9 
#include <stdbool.h>
10 
#include <unistd.h>
11 
#include <stdlib.h>
12 
#include <dirent.h>
13 
#include <stdio.h>
14 
#include <string.h>
15 
#include <fcntl.h>
16 
#include <sys/stat.h>
17 
#include <sys/wait.h>
12 nishi 18 
#include <signal.h>
11 nishi 19 
 
20 
char* rv_construct_repouser(const char* reponame, const char* username) {
21 
	char cbuf[2];
22 
	cbuf[0] = REPO_USER_DELIM;
23 
	cbuf[1] = 0;
24 
	return rv_strcat3(reponame, cbuf, username);
25 
}
26 
 
27 
bool rv_repo_exists(const char* repouser) {
28 
	char* path = rv_strcat3(SVN_ROOT, "/", repouser);
29 
	if(access(path, F_OK) == 0) {
30 
		free(path);
31 
		return true;
32 
	}
33 
	return false;
34 
}
35 
 
36 
void rv_repo_list(const char* username, void (*handler)(const char* name, const char* rev)) {
37 
	struct dirent** nl;
38 
	int n = scandir(SVN_ROOT, &nl, NULL, alphasort);
39 
	if(n < 0) return;
40 
	int i;
41 
	for(i = 0; i < n; i++) {
42 
		if(strcmp(nl[i]->d_name, "..") != 0 && strcmp(nl[i]->d_name, ".") != 0) {
43 
			char* tmp = rv_strcat3(SVN_ROOT, "/", nl[i]->d_name);
44 
			char* path = rv_strcat(tmp, "/db/current");
45 
			free(tmp);
46 
			char* str = rv_strdup(nl[i]->d_name);
47 
			int j;
48 
			for(j = 0; str[j] != 0; j++) {
49 
				if(str[j] == REPO_USER_DELIM) {
50 
					str[j] = 0;
51 
					if(strcmp(str + j + 1, username) == 0) {
52 
						struct stat s;
53 
						char* rev = rv_strdup("???");
54 
						if(stat(path, &s) == 0) {
55 
							free(rev);
56 
							rev = malloc(s.st_size + 1);
57 
							FILE* f = fopen(path, "r");
58 
							fread(rev, 1, s.st_size, f);
59 
							fclose(f);
60 
							rev[s.st_size] = 0;
61 
						}
62 
						handler(str, rev);
63 
						free(rev);
64 
					}
65 
					break;
66 
				}
67 
			}
68 
			free(path);
69 
			free(str);
70 
		}
71 
		free(nl[i]);
72 
	}
73 
	free(nl);
74 
}
75 
 
76 
void null_exec(char** cmd) {
77 
	pid_t pid = fork();
78 
	if(pid == 0) {
79 
		int null = open("/dev/null", O_RDWR);
80 
		dup2(STDOUT_FILENO, null);
81 
		execvp(cmd[0], cmd);
82 
		_exit(0);
83 
	} else {
84 
		waitpid(pid, 0, 0);
85 
	}
86 
}
87 
 
88 
void rv_create_repo(const char* repouser) {
89 
	char* user = rv_strdup(repouser);
90 
	int i;
91 
	for(i = 0; user[i] != 0; i++) {
92 
		if(user[i] == REPO_USER_DELIM) {
93 
			user[i] = 0;
94 
			break;
95 
		}
96 
	}
97 
	char* path = rv_strcat3(SVN_ROOT, "/", repouser);
98 
	char* cmd[] = {"svnadmin", "create", path, NULL};
99 
	null_exec(cmd);
16 nishi 100 
 
101 
	char* readme = rv_strcat(path, "/README.txt");
102 
	FILE* f = fopen(readme, "w");
103 
	fprintf(f, "This is the default README of the RepoView repository.\n");
104 
	fprintf(f, "You can change it from the repository manager.\n");
105 
	fclose(f);
106 
	free(readme);
107 
 
11 nishi 108 
	free(path);
16 nishi 109 
	f = fopen(APACHE_AUTHZ, "r+");
11 nishi 110 
	lockf(fileno(f), F_LOCK, 0);
111 
 
112 
	fseek(f, 0, SEEK_END);
113 
 
114 
	fprintf(f, "#%%START %s\n", repouser);
15 nishi 115 
	fprintf(f, "[%s:/]\n", repouser);
11 nishi 116 
	fprintf(f, "* = r\n");
15 nishi 117 
	fprintf(f, "%s = rw\n", user);
11 nishi 118 
	fprintf(f, "#%%END\n");
119 
 
120 
	lockf(fileno(f), F_ULOCK, 0);
121 
	free(user);
122 
}
123 
 
124 
char* rv_get_readme(const char* repouser) {
125 
	char* tmp = rv_strcat3(SVN_ROOT, "/", repouser);
126 
	char* path = rv_strcat(tmp, "/README.txt");
127 
	free(tmp);
128 
	struct stat s;
129 
	if(stat(path, &s) == 0) {
130 
		FILE* f = fopen(path, "r");
131 
		char* buf = malloc(s.st_size + 1);
132 
		fread(buf, 1, s.st_size, f);
133 
		fclose(f);
134 
		buf[s.st_size] = 0;
135 
		return buf;
136 
	}
137 
	return NULL;
138 
}
139 
 
140 
long long rv_get_filesize(const char* repouser, const char* path) {
141 
	char* svnpath = rv_strcat3(SVN_ROOT, "/", repouser);
142 
	int pipes[2];
143 
	pipe(pipes);
144 
	pid_t pid = fork();
145 
	if(pid == 0) {
146 
		close(pipes[0]);
147 
		dup2(pipes[1], STDOUT_FILENO);
148 
		char* cmd[] = {"svnlook", "filesize", svnpath, (char*)path, NULL};
149 
		execvp("svnlook", cmd);
150 
		_exit(0);
151 
	} else {
152 
		close(pipes[1]);
153 
		char cbuf[2];
154 
		cbuf[1] = 0;
155 
		char* d = malloc(1);
156 
		d[0] = 0;
157 
		while(1) {
158 
			int n = read(pipes[0], cbuf, 1);
159 
			if(n == 0) break;
160 
			char* tmp = d;
161 
			d = rv_strcat(tmp, cbuf);
162 
			free(tmp);
163 
		}
164 
		int status;
165 
		waitpid(pid, &status, 0);
166 
		if(WEXITSTATUS(status) != 0) {
167 
			free(d);
168 
			free(svnpath);
169 
			return -1;
170 
		}
171 
		long long sz = atoll(d);
172 
		free(svnpath);
173 
		free(d);
174 
		return sz;
175 
	}
176 
}
177 
 
14 nishi 178 
void rv_remove_repo(const char* repouser) {
179 
	printf("");
180 
	char* svnpath = rv_strcat3(SVN_ROOT, "/", repouser);
181 
	pid_t pid = fork();
182 
	if(pid == 0) {
183 
		char* cmd[] = {"rm", "-rf", svnpath, NULL};
184 
		execvp("rm", cmd);
185 
		_exit(0);
186 
	} else {
187 
		waitpid(pid, 0, 0);
188 
	}
189 
	free(svnpath);
190 
 
191 
	FILE* f = fopen(APACHE_AUTHZ, "r+");
192 
	lockf(fileno(f), F_LOCK, 0);
193 
 
194 
	fseek(f, 0, SEEK_SET);
195 
	struct stat s;
196 
	stat(APACHE_AUTHZ, &s);
197 
	char* buffer = malloc(s.st_size + 1);
198 
	fread(buffer, 1, s.st_size, f);
199 
	buffer[s.st_size] = 0;
200 
 
201 
	f = freopen(APACHE_AUTHZ, "w+", f);
202 
	lockf(fileno(f), F_LOCK, 0);
203 
	int incr = 0;
204 
	int i;
205 
	char* start = rv_strcat("#%START ", repouser);
206 
	bool discard = false;
207 
	for(i = 0;; i++) {
208 
		if(buffer[i] == '\n' || buffer[i] == 0) {
209 
			char oldc = buffer[i];
210 
			buffer[i] = 0;
211 
 
212 
			char* line = buffer + incr;
213 
			if(strcmp(line, start) == 0) {
214 
				discard = true;
215 
			} else if(discard && strcmp(line, "#%END") == 0) {
216 
				discard = false;
15 nishi 217 
			} else if(strcmp(line, "") == 0) {
14 nishi 218 
			} else if(!discard) {
219 
				fprintf(f, "%s\n", line);
220 
			}
221 
 
222 
			incr = i + 1;
223 
			if(oldc == 0) break;
224 
		}
225 
	}
226 
 
227 
	lockf(fileno(f), F_ULOCK, 0);
228 
	fclose(f);
229 
}
230 
 
15 nishi 231 
void rv_set_readme(const char* repouser, const char* readme) {
232 
	char* svnpath = rv_strcat3(SVN_ROOT, "/", repouser);
233 
	char* path = rv_strcat(svnpath, "/README.txt");
234 
	FILE* f = fopen(path, "w");
235 
	if(f != NULL) {
236 
		fwrite(readme, 1, strlen(readme), f);
237 
		fclose(f);
238 
	}
239 
	free(path);
240 
	free(svnpath);
241 
}
242 
 
11 nishi 243 
bool rv_get_list(const char* repouser, const char* path, void (*handler)(const char* pathname), int* isdir) {
244 
	char* svnpath = rv_strcat3(SVN_ROOT, "/", repouser);
245 
	int pipes[2];
246 
	*isdir = 0;
247 
	pipe(pipes);
248 
	pid_t pid = fork();
249 
	if(pid == 0) {
250 
		close(pipes[0]);
251 
		dup2(pipes[1], STDOUT_FILENO);
252 
		char* cmd[] = {"svnlook", "-N", "tree", svnpath, (char*)path, NULL};
253 
		execvp("svnlook", cmd);
254 
		_exit(0);
255 
	} else {
256 
		close(pipes[1]);
257 
		char cbuf[2];
258 
		cbuf[1] = 0;
259 
		char* d = malloc(1);
260 
		d[0] = 0;
261 
		while(1) {
262 
			int n = read(pipes[0], cbuf, 1);
263 
			if(n == 0) break;
264 
			char* tmp = d;
265 
			d = rv_strcat(tmp, cbuf);
266 
			free(tmp);
267 
		}
268 
		int status;
269 
		waitpid(pid, &status, 0);
270 
		if(WEXITSTATUS(status) != 0) {
271 
			free(d);
272 
			free(svnpath);
273 
			return false;
274 
		}
275 
		int count = 0;
276 
		int incr = 0;
277 
		int i;
278 
		int phase = 0;
279 
	repeat:
280 
		for(i = 0;; i++) {
281 
			if(d[i] == '\r') {
282 
				d[i] = 0;
283 
			} else if(d[i] == '\n' || d[i] == 0) {
284 
				char oldc = d[i];
285 
				d[i] = 0;
286 
				count++;
12 nishi 287 
				if(count > 1 && d[incr] != 0 && strlen(d + incr + 1) > 0) {
11 nishi 288 
					char* pathname = d + incr + 1;
289 
					if(phase == 0 && pathname[strlen(pathname) - 1] == '/') {
290 
						handler(d + incr + 1);
291 
					} else if(phase == 1 && pathname[strlen(pathname) - 1] != '/') {
292 
						handler(d + incr + 1);
293 
					}
294 
				} else {
295 
					char* pathname = d + incr;
296 
					if(pathname[strlen(pathname) - 1] == '/') *isdir = 1;
297 
				}
298 
				d[i] = oldc;
299 
				incr = i + 1;
300 
				if(oldc == 0) break;
301 
			}
302 
		}
303 
		phase++;
12 nishi 304 
		incr = 0;
305 
		count = 0;
11 nishi 306 
		if(phase == 1) goto repeat;
307 
		free(d);
308 
	}
309 
	free(svnpath);
310 
	return true;
311 
}
312 
 
313 
char* rv_read_file(const char* repouser, char* path) {
12 nishi 314 
	if(rv_get_filesize(repouser, path) > 1024 * 128) return NULL;
11 nishi 315 
	char* svnpath = rv_strcat3(SVN_ROOT, "/", repouser);
316 
	int pipes[2];
317 
	pipe(pipes);
318 
	pid_t pid = fork();
319 
	if(pid == 0) {
320 
		close(pipes[0]);
321 
		dup2(pipes[1], STDOUT_FILENO);
322 
		char* cmd[] = {"svnlook", "cat", svnpath, (char*)path, NULL};
323 
		execvp("svnlook", cmd);
324 
		_exit(0);
325 
	} else {
326 
		close(pipes[1]);
12 nishi 327 
		char cbuf[1024];
328 
		char* d = malloc(1024 * 128);
329 
		int incr = 0;
330 
		bool bin = false;
11 nishi 331 
		while(1) {
12 nishi 332 
			int n = read(pipes[0], cbuf, 1024);
333 
			if(cbuf[0] == 0) {
334 
				bin = true;
335 
				kill(pid, SIGKILL);
336 
				break;
337 
			}
11 nishi 338 
			if(n == 0) break;
12 nishi 339 
			memcpy(d + incr, cbuf, n);
340 
			d[incr + n] = 0;
341 
			incr += n;
11 nishi 342 
		}
343 
		int status;
344 
		waitpid(pid, &status, 0);
345 
		if(WEXITSTATUS(status) != 0) {
346 
			free(d);
347 
			free(svnpath);
348 
			return NULL;
349 
		}
12 nishi 350 
		if(bin) {
351 
			free(d);
352 
			return NULL;
353 
		}
11 nishi 354 
		return d;
355 
	}
356 
}