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10 nishi 1 
/* $Id: repo.c 14 2024-08-21 14:24:05Z 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);
107 
	fprintf(f, "* = r\n");
108 
	fprintf(f, "%s = r\n", user);
109 
	fprintf(f, "#%%END\n");
110 
 
111 
	lockf(fileno(f), F_ULOCK, 0);
112 
	free(user);
113 
}
114 
 
115 
char* rv_get_readme(const char* repouser) {
116 
	char* tmp = rv_strcat3(SVN_ROOT, "/", repouser);
117 
	char* path = rv_strcat(tmp, "/README.txt");
118 
	free(tmp);
119 
	struct stat s;
120 
	if(stat(path, &s) == 0) {
121 
		FILE* f = fopen(path, "r");
122 
		char* buf = malloc(s.st_size + 1);
123 
		fread(buf, 1, s.st_size, f);
124 
		fclose(f);
125 
		buf[s.st_size] = 0;
126 
		return buf;
127 
	}
128 
	return NULL;
129 
}
130 
 
131 
long long rv_get_filesize(const char* repouser, const char* path) {
132 
	char* svnpath = rv_strcat3(SVN_ROOT, "/", repouser);
133 
	int pipes[2];
134 
	pipe(pipes);
135 
	pid_t pid = fork();
136 
	if(pid == 0) {
137 
		close(pipes[0]);
138 
		dup2(pipes[1], STDOUT_FILENO);
139 
		char* cmd[] = {"svnlook", "filesize", svnpath, (char*)path, NULL};
140 
		execvp("svnlook", cmd);
141 
		_exit(0);
142 
	} else {
143 
		close(pipes[1]);
144 
		char cbuf[2];
145 
		cbuf[1] = 0;
146 
		char* d = malloc(1);
147 
		d[0] = 0;
148 
		while(1) {
149 
			int n = read(pipes[0], cbuf, 1);
150 
			if(n == 0) break;
151 
			char* tmp = d;
152 
			d = rv_strcat(tmp, cbuf);
153 
			free(tmp);
154 
		}
155 
		int status;
156 
		waitpid(pid, &status, 0);
157 
		if(WEXITSTATUS(status) != 0) {
158 
			free(d);
159 
			free(svnpath);
160 
			return -1;
161 
		}
162 
		long long sz = atoll(d);
163 
		free(svnpath);
164 
		free(d);
165 
		return sz;
166 
	}
167 
}
168 
 
14 nishi 169 
void rv_remove_repo(const char* repouser) {
170 
	printf("");
171 
	char* svnpath = rv_strcat3(SVN_ROOT, "/", repouser);
172 
	pid_t pid = fork();
173 
	if(pid == 0) {
174 
		char* cmd[] = {"rm", "-rf", svnpath, NULL};
175 
		execvp("rm", cmd);
176 
		_exit(0);
177 
	} else {
178 
		waitpid(pid, 0, 0);
179 
	}
180 
	free(svnpath);
181 
 
182 
	FILE* f = fopen(APACHE_AUTHZ, "r+");
183 
	lockf(fileno(f), F_LOCK, 0);
184 
 
185 
	fseek(f, 0, SEEK_SET);
186 
	struct stat s;
187 
	stat(APACHE_AUTHZ, &s);
188 
	char* buffer = malloc(s.st_size + 1);
189 
	fread(buffer, 1, s.st_size, f);
190 
	buffer[s.st_size] = 0;
191 
 
192 
	f = freopen(APACHE_AUTHZ, "w+", f);
193 
	lockf(fileno(f), F_LOCK, 0);
194 
	int incr = 0;
195 
	int i;
196 
	char* start = rv_strcat("#%START ", repouser);
197 
	bool discard = false;
198 
	for(i = 0;; i++) {
199 
		if(buffer[i] == '\n' || buffer[i] == 0) {
200 
			char oldc = buffer[i];
201 
			buffer[i] = 0;
202 
 
203 
			char* line = buffer + incr;
204 
			if(strcmp(line, start) == 0) {
205 
				discard = true;
206 
			} else if(discard && strcmp(line, "#%END") == 0) {
207 
				discard = false;
208 
			} else if(!discard) {
209 
				fprintf(f, "%s\n", line);
210 
			}
211 
 
212 
			incr = i + 1;
213 
			if(oldc == 0) break;
214 
		}
215 
	}
216 
 
217 
	lockf(fileno(f), F_ULOCK, 0);
218 
	fclose(f);
219 
}
220 
 
11 nishi 221 
bool rv_get_list(const char* repouser, const char* path, void (*handler)(const char* pathname), int* isdir) {
222 
	char* svnpath = rv_strcat3(SVN_ROOT, "/", repouser);
223 
	int pipes[2];
224 
	*isdir = 0;
225 
	pipe(pipes);
226 
	pid_t pid = fork();
227 
	if(pid == 0) {
228 
		close(pipes[0]);
229 
		dup2(pipes[1], STDOUT_FILENO);
230 
		char* cmd[] = {"svnlook", "-N", "tree", svnpath, (char*)path, NULL};
231 
		execvp("svnlook", cmd);
232 
		_exit(0);
233 
	} else {
234 
		close(pipes[1]);
235 
		char cbuf[2];
236 
		cbuf[1] = 0;
237 
		char* d = malloc(1);
238 
		d[0] = 0;
239 
		while(1) {
240 
			int n = read(pipes[0], cbuf, 1);
241 
			if(n == 0) break;
242 
			char* tmp = d;
243 
			d = rv_strcat(tmp, cbuf);
244 
			free(tmp);
245 
		}
246 
		int status;
247 
		waitpid(pid, &status, 0);
248 
		if(WEXITSTATUS(status) != 0) {
249 
			free(d);
250 
			free(svnpath);
251 
			return false;
252 
		}
253 
		int count = 0;
254 
		int incr = 0;
255 
		int i;
256 
		int phase = 0;
257 
	repeat:
258 
		for(i = 0;; i++) {
259 
			if(d[i] == '\r') {
260 
				d[i] = 0;
261 
			} else if(d[i] == '\n' || d[i] == 0) {
262 
				char oldc = d[i];
263 
				d[i] = 0;
264 
				count++;
12 nishi 265 
				if(count > 1 && d[incr] != 0 && strlen(d + incr + 1) > 0) {
11 nishi 266 
					char* pathname = d + incr + 1;
267 
					if(phase == 0 && pathname[strlen(pathname) - 1] == '/') {
268 
						handler(d + incr + 1);
269 
					} else if(phase == 1 && pathname[strlen(pathname) - 1] != '/') {
270 
						handler(d + incr + 1);
271 
					}
272 
				} else {
273 
					char* pathname = d + incr;
274 
					if(pathname[strlen(pathname) - 1] == '/') *isdir = 1;
275 
				}
276 
				d[i] = oldc;
277 
				incr = i + 1;
278 
				if(oldc == 0) break;
279 
			}
280 
		}
281 
		phase++;
12 nishi 282 
		incr = 0;
283 
		count = 0;
11 nishi 284 
		if(phase == 1) goto repeat;
285 
		free(d);
286 
	}
287 
	free(svnpath);
288 
	return true;
289 
}
290 
 
291 
char* rv_read_file(const char* repouser, char* path) {
12 nishi 292 
	if(rv_get_filesize(repouser, path) > 1024 * 128) return NULL;
11 nishi 293 
	char* svnpath = rv_strcat3(SVN_ROOT, "/", repouser);
294 
	int pipes[2];
295 
	pipe(pipes);
296 
	pid_t pid = fork();
297 
	if(pid == 0) {
298 
		close(pipes[0]);
299 
		dup2(pipes[1], STDOUT_FILENO);
300 
		char* cmd[] = {"svnlook", "cat", svnpath, (char*)path, NULL};
301 
		execvp("svnlook", cmd);
302 
		_exit(0);
303 
	} else {
304 
		close(pipes[1]);
12 nishi 305 
		char cbuf[1024];
306 
		char* d = malloc(1024 * 128);
307 
		int incr = 0;
308 
		bool bin = false;
11 nishi 309 
		while(1) {
12 nishi 310 
			int n = read(pipes[0], cbuf, 1024);
311 
			if(cbuf[0] == 0) {
312 
				bin = true;
313 
				kill(pid, SIGKILL);
314 
				break;
315 
			}
11 nishi 316 
			if(n == 0) break;
12 nishi 317 
			memcpy(d + incr, cbuf, n);
318 
			d[incr + n] = 0;
319 
			incr += n;
11 nishi 320 
		}
321 
		int status;
322 
		waitpid(pid, &status, 0);
323 
		if(WEXITSTATUS(status) != 0) {
324 
			free(d);
325 
			free(svnpath);
326 
			return NULL;
327 
		}
12 nishi 328 
		if(bin) {
329 
			free(d);
330 
			return NULL;
331 
		}
11 nishi 332 
		return d;
333 
	}
334 
}