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10 nishi 1 
/* $Id: repo.c 12 2024-08-21 05:05:19Z 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 
 
169 
bool rv_get_list(const char* repouser, const char* path, void (*handler)(const char* pathname), int* isdir) {
170 
	char* svnpath = rv_strcat3(SVN_ROOT, "/", repouser);
171 
	int pipes[2];
172 
	*isdir = 0;
173 
	pipe(pipes);
174 
	pid_t pid = fork();
175 
	if(pid == 0) {
176 
		close(pipes[0]);
177 
		dup2(pipes[1], STDOUT_FILENO);
178 
		char* cmd[] = {"svnlook", "-N", "tree", svnpath, (char*)path, NULL};
179 
		execvp("svnlook", cmd);
180 
		_exit(0);
181 
	} else {
182 
		close(pipes[1]);
183 
		char cbuf[2];
184 
		cbuf[1] = 0;
185 
		char* d = malloc(1);
186 
		d[0] = 0;
187 
		while(1) {
188 
			int n = read(pipes[0], cbuf, 1);
189 
			if(n == 0) break;
190 
			char* tmp = d;
191 
			d = rv_strcat(tmp, cbuf);
192 
			free(tmp);
193 
		}
194 
		int status;
195 
		waitpid(pid, &status, 0);
196 
		if(WEXITSTATUS(status) != 0) {
197 
			free(d);
198 
			free(svnpath);
199 
			return false;
200 
		}
201 
		int count = 0;
202 
		int incr = 0;
203 
		int i;
204 
		int phase = 0;
205 
	repeat:
206 
		for(i = 0;; i++) {
207 
			if(d[i] == '\r') {
208 
				d[i] = 0;
209 
			} else if(d[i] == '\n' || d[i] == 0) {
210 
				char oldc = d[i];
211 
				d[i] = 0;
212 
				count++;
12 nishi 213 
				if(count > 1 && d[incr] != 0 && strlen(d + incr + 1) > 0) {
11 nishi 214 
					char* pathname = d + incr + 1;
215 
					if(phase == 0 && pathname[strlen(pathname) - 1] == '/') {
216 
						handler(d + incr + 1);
217 
					} else if(phase == 1 && pathname[strlen(pathname) - 1] != '/') {
218 
						handler(d + incr + 1);
219 
					}
220 
				} else {
221 
					char* pathname = d + incr;
222 
					if(pathname[strlen(pathname) - 1] == '/') *isdir = 1;
223 
				}
224 
				d[i] = oldc;
225 
				incr = i + 1;
226 
				if(oldc == 0) break;
227 
			}
228 
		}
229 
		phase++;
12 nishi 230 
		incr = 0;
231 
		count = 0;
11 nishi 232 
		if(phase == 1) goto repeat;
233 
		free(d);
234 
	}
235 
	free(svnpath);
236 
	return true;
237 
}
238 
 
239 
char* rv_read_file(const char* repouser, char* path) {
12 nishi 240 
	if(rv_get_filesize(repouser, path) > 1024 * 128) return NULL;
11 nishi 241 
	char* svnpath = rv_strcat3(SVN_ROOT, "/", repouser);
242 
	int pipes[2];
243 
	pipe(pipes);
244 
	pid_t pid = fork();
245 
	if(pid == 0) {
246 
		close(pipes[0]);
247 
		dup2(pipes[1], STDOUT_FILENO);
248 
		char* cmd[] = {"svnlook", "cat", svnpath, (char*)path, NULL};
249 
		execvp("svnlook", cmd);
250 
		_exit(0);
251 
	} else {
252 
		close(pipes[1]);
12 nishi 253 
		char cbuf[1024];
254 
		char* d = malloc(1024 * 128);
255 
		int incr = 0;
256 
		bool bin = false;
11 nishi 257 
		while(1) {
12 nishi 258 
			int n = read(pipes[0], cbuf, 1024);
259 
			if(cbuf[0] == 0) {
260 
				bin = true;
261 
				kill(pid, SIGKILL);
262 
				break;
263 
			}
11 nishi 264 
			if(n == 0) break;
12 nishi 265 
			memcpy(d + incr, cbuf, n);
266 
			d[incr + n] = 0;
267 
			incr += n;
11 nishi 268 
		}
269 
		int status;
270 
		waitpid(pid, &status, 0);
271 
		if(WEXITSTATUS(status) != 0) {
272 
			free(d);
273 
			free(svnpath);
274 
			return NULL;
275 
		}
12 nishi 276 
		if(bin) {
277 
			free(d);
278 
			return NULL;
279 
		}
11 nishi 280 
		return d;
281 
	}
282 
}