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10 nishi 1 
/* $Id: repo.c 15 2024-08-21 15:36:37Z 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);
100 
	free(path);
101 
	FILE* f = fopen(APACHE_AUTHZ, "r+");
102 
	lockf(fileno(f), F_LOCK, 0);
103 
 
104 
	fseek(f, 0, SEEK_END);
105 
 
106 
	fprintf(f, "#%%START %s\n", repouser);
15 nishi 107 
	fprintf(f, "[%s:/]\n", repouser);
11 nishi 108 
	fprintf(f, "* = r\n");
15 nishi 109 
	fprintf(f, "%s = rw\n", user);
11 nishi 110 
	fprintf(f, "#%%END\n");
111 
 
112 
	lockf(fileno(f), F_ULOCK, 0);
113 
	free(user);
114 
}
115 
 
116 
char* rv_get_readme(const char* repouser) {
117 
	char* tmp = rv_strcat3(SVN_ROOT, "/", repouser);
118 
	char* path = rv_strcat(tmp, "/README.txt");
119 
	free(tmp);
120 
	struct stat s;
121 
	if(stat(path, &s) == 0) {
122 
		FILE* f = fopen(path, "r");
123 
		char* buf = malloc(s.st_size + 1);
124 
		fread(buf, 1, s.st_size, f);
125 
		fclose(f);
126 
		buf[s.st_size] = 0;
127 
		return buf;
128 
	}
129 
	return NULL;
130 
}
131 
 
132 
long long rv_get_filesize(const char* repouser, const char* path) {
133 
	char* svnpath = rv_strcat3(SVN_ROOT, "/", repouser);
134 
	int pipes[2];
135 
	pipe(pipes);
136 
	pid_t pid = fork();
137 
	if(pid == 0) {
138 
		close(pipes[0]);
139 
		dup2(pipes[1], STDOUT_FILENO);
140 
		char* cmd[] = {"svnlook", "filesize", svnpath, (char*)path, NULL};
141 
		execvp("svnlook", cmd);
142 
		_exit(0);
143 
	} else {
144 
		close(pipes[1]);
145 
		char cbuf[2];
146 
		cbuf[1] = 0;
147 
		char* d = malloc(1);
148 
		d[0] = 0;
149 
		while(1) {
150 
			int n = read(pipes[0], cbuf, 1);
151 
			if(n == 0) break;
152 
			char* tmp = d;
153 
			d = rv_strcat(tmp, cbuf);
154 
			free(tmp);
155 
		}
156 
		int status;
157 
		waitpid(pid, &status, 0);
158 
		if(WEXITSTATUS(status) != 0) {
159 
			free(d);
160 
			free(svnpath);
161 
			return -1;
162 
		}
163 
		long long sz = atoll(d);
164 
		free(svnpath);
165 
		free(d);
166 
		return sz;
167 
	}
168 
}
169 
 
14 nishi 170 
void rv_remove_repo(const char* repouser) {
171 
	printf("");
172 
	char* svnpath = rv_strcat3(SVN_ROOT, "/", repouser);
173 
	pid_t pid = fork();
174 
	if(pid == 0) {
175 
		char* cmd[] = {"rm", "-rf", svnpath, NULL};
176 
		execvp("rm", cmd);
177 
		_exit(0);
178 
	} else {
179 
		waitpid(pid, 0, 0);
180 
	}
181 
	free(svnpath);
182 
 
183 
	FILE* f = fopen(APACHE_AUTHZ, "r+");
184 
	lockf(fileno(f), F_LOCK, 0);
185 
 
186 
	fseek(f, 0, SEEK_SET);
187 
	struct stat s;
188 
	stat(APACHE_AUTHZ, &s);
189 
	char* buffer = malloc(s.st_size + 1);
190 
	fread(buffer, 1, s.st_size, f);
191 
	buffer[s.st_size] = 0;
192 
 
193 
	f = freopen(APACHE_AUTHZ, "w+", f);
194 
	lockf(fileno(f), F_LOCK, 0);
195 
	int incr = 0;
196 
	int i;
197 
	char* start = rv_strcat("#%START ", repouser);
198 
	bool discard = false;
199 
	for(i = 0;; i++) {
200 
		if(buffer[i] == '\n' || buffer[i] == 0) {
201 
			char oldc = buffer[i];
202 
			buffer[i] = 0;
203 
 
204 
			char* line = buffer + incr;
205 
			if(strcmp(line, start) == 0) {
206 
				discard = true;
207 
			} else if(discard && strcmp(line, "#%END") == 0) {
208 
				discard = false;
15 nishi 209 
			} else if(strcmp(line, "") == 0) {
14 nishi 210 
			} else if(!discard) {
211 
				fprintf(f, "%s\n", line);
212 
			}
213 
 
214 
			incr = i + 1;
215 
			if(oldc == 0) break;
216 
		}
217 
	}
218 
 
219 
	lockf(fileno(f), F_ULOCK, 0);
220 
	fclose(f);
221 
}
222 
 
15 nishi 223 
void rv_set_readme(const char* repouser, const char* readme) {
224 
	char* svnpath = rv_strcat3(SVN_ROOT, "/", repouser);
225 
	char* path = rv_strcat(svnpath, "/README.txt");
226 
	FILE* f = fopen(path, "w");
227 
	if(f != NULL) {
228 
		fwrite(readme, 1, strlen(readme), f);
229 
		fclose(f);
230 
	}
231 
	free(path);
232 
	free(svnpath);
233 
}
234 
 
11 nishi 235 
bool rv_get_list(const char* repouser, const char* path, void (*handler)(const char* pathname), int* isdir) {
236 
	char* svnpath = rv_strcat3(SVN_ROOT, "/", repouser);
237 
	int pipes[2];
238 
	*isdir = 0;
239 
	pipe(pipes);
240 
	pid_t pid = fork();
241 
	if(pid == 0) {
242 
		close(pipes[0]);
243 
		dup2(pipes[1], STDOUT_FILENO);
244 
		char* cmd[] = {"svnlook", "-N", "tree", svnpath, (char*)path, NULL};
245 
		execvp("svnlook", cmd);
246 
		_exit(0);
247 
	} else {
248 
		close(pipes[1]);
249 
		char cbuf[2];
250 
		cbuf[1] = 0;
251 
		char* d = malloc(1);
252 
		d[0] = 0;
253 
		while(1) {
254 
			int n = read(pipes[0], cbuf, 1);
255 
			if(n == 0) break;
256 
			char* tmp = d;
257 
			d = rv_strcat(tmp, cbuf);
258 
			free(tmp);
259 
		}
260 
		int status;
261 
		waitpid(pid, &status, 0);
262 
		if(WEXITSTATUS(status) != 0) {
263 
			free(d);
264 
			free(svnpath);
265 
			return false;
266 
		}
267 
		int count = 0;
268 
		int incr = 0;
269 
		int i;
270 
		int phase = 0;
271 
	repeat:
272 
		for(i = 0;; i++) {
273 
			if(d[i] == '\r') {
274 
				d[i] = 0;
275 
			} else if(d[i] == '\n' || d[i] == 0) {
276 
				char oldc = d[i];
277 
				d[i] = 0;
278 
				count++;
12 nishi 279 
				if(count > 1 && d[incr] != 0 && strlen(d + incr + 1) > 0) {
11 nishi 280 
					char* pathname = d + incr + 1;
281 
					if(phase == 0 && pathname[strlen(pathname) - 1] == '/') {
282 
						handler(d + incr + 1);
283 
					} else if(phase == 1 && pathname[strlen(pathname) - 1] != '/') {
284 
						handler(d + incr + 1);
285 
					}
286 
				} else {
287 
					char* pathname = d + incr;
288 
					if(pathname[strlen(pathname) - 1] == '/') *isdir = 1;
289 
				}
290 
				d[i] = oldc;
291 
				incr = i + 1;
292 
				if(oldc == 0) break;
293 
			}
294 
		}
295 
		phase++;
12 nishi 296 
		incr = 0;
297 
		count = 0;
11 nishi 298 
		if(phase == 1) goto repeat;
299 
		free(d);
300 
	}
301 
	free(svnpath);
302 
	return true;
303 
}
304 
 
305 
char* rv_read_file(const char* repouser, char* path) {
12 nishi 306 
	if(rv_get_filesize(repouser, path) > 1024 * 128) return NULL;
11 nishi 307 
	char* svnpath = rv_strcat3(SVN_ROOT, "/", repouser);
308 
	int pipes[2];
309 
	pipe(pipes);
310 
	pid_t pid = fork();
311 
	if(pid == 0) {
312 
		close(pipes[0]);
313 
		dup2(pipes[1], STDOUT_FILENO);
314 
		char* cmd[] = {"svnlook", "cat", svnpath, (char*)path, NULL};
315 
		execvp("svnlook", cmd);
316 
		_exit(0);
317 
	} else {
318 
		close(pipes[1]);
12 nishi 319 
		char cbuf[1024];
320 
		char* d = malloc(1024 * 128);
321 
		int incr = 0;
322 
		bool bin = false;
11 nishi 323 
		while(1) {
12 nishi 324 
			int n = read(pipes[0], cbuf, 1024);
325 
			if(cbuf[0] == 0) {
326 
				bin = true;
327 
				kill(pid, SIGKILL);
328 
				break;
329 
			}
11 nishi 330 
			if(n == 0) break;
12 nishi 331 
			memcpy(d + incr, cbuf, n);
332 
			d[incr + n] = 0;
333 
			incr += n;
11 nishi 334 
		}
335 
		int status;
336 
		waitpid(pid, &status, 0);
337 
		if(WEXITSTATUS(status) != 0) {
338 
			free(d);
339 
			free(svnpath);
340 
			return NULL;
341 
		}
12 nishi 342 
		if(bin) {
343 
			free(d);
344 
			return NULL;
345 
		}
11 nishi 346 
		return d;
347 
	}
348 
}