cgitsb/scan-tree.c
Stefan Gehn f15c5833d2 Fix crash when projectsfile cannot be opened
This patch makes cgit properly abort in case the projectsfile cannot
be opened. Without the added return cgit continues using the projects
pointer which is NULL and thus causes a segfault.
2011-03-26 11:44:16 +01:00

243 regels
5.4 KiB
C

/* scan-tree.c
*
* Copyright (C) 2008-2009 Lars Hjemli
* Copyright (C) 2010 Jason A. Donenfeld <Jason@zx2c4.com>
*
* Licensed under GNU General Public License v2
* (see COPYING for full license text)
*/
#include "cgit.h"
#include "configfile.h"
#include "html.h"
#define MAX_PATH 4096
/* return 1 if path contains a objects/ directory and a HEAD file */
static int is_git_dir(const char *path)
{
struct stat st;
static char buf[MAX_PATH];
if (snprintf(buf, MAX_PATH, "%s/objects", path) >= MAX_PATH) {
fprintf(stderr, "Insanely long path: %s\n", path);
return 0;
}
if (stat(buf, &st)) {
if (errno != ENOENT)
fprintf(stderr, "Error checking path %s: %s (%d)\n",
path, strerror(errno), errno);
return 0;
}
if (!S_ISDIR(st.st_mode))
return 0;
sprintf(buf, "%s/HEAD", path);
if (stat(buf, &st)) {
if (errno != ENOENT)
fprintf(stderr, "Error checking path %s: %s (%d)\n",
path, strerror(errno), errno);
return 0;
}
if (!S_ISREG(st.st_mode))
return 0;
return 1;
}
struct cgit_repo *repo;
repo_config_fn config_fn;
char *owner;
static void repo_config(const char *name, const char *value)
{
config_fn(repo, name, value);
}
static int git_owner_config(const char *key, const char *value, void *cb)
{
if (!strcmp(key, "gitweb.owner"))
owner = xstrdup(value);
return 0;
}
static char *xstrrchr(char *s, char *from, int c)
{
while (from >= s && *from != c)
from--;
return from < s ? NULL : from;
}
static void add_repo(const char *base, const char *path, repo_config_fn fn)
{
struct stat st;
struct passwd *pwd;
char *rel, *p, *slash;
int n;
size_t size;
if (stat(path, &st)) {
fprintf(stderr, "Error accessing %s: %s (%d)\n",
path, strerror(errno), errno);
return;
}
if (ctx.cfg.strict_export && stat(fmt("%s/%s", path, ctx.cfg.strict_export), &st))
return;
if (!stat(fmt("%s/noweb", path), &st))
return;
owner = NULL;
if (ctx.cfg.enable_gitweb_owner)
git_config_from_file(git_owner_config, fmt("%s/config", path), NULL);
if (base == path)
rel = xstrdup(fmt("%s", path));
else
rel = xstrdup(fmt("%s", path + strlen(base) + 1));
if (!strcmp(rel + strlen(rel) - 5, "/.git"))
rel[strlen(rel) - 5] = '\0';
repo = cgit_add_repo(rel);
if (ctx.cfg.remove_suffix)
if ((p = strrchr(repo->url, '.')) && !strcmp(p, ".git"))
*p = '\0';
repo->name = repo->url;
repo->path = xstrdup(path);
while (!owner) {
if ((pwd = getpwuid(st.st_uid)) == NULL) {
fprintf(stderr, "Error reading owner-info for %s: %s (%d)\n",
path, strerror(errno), errno);
break;
}
if (pwd->pw_gecos)
if ((p = strchr(pwd->pw_gecos, ',')))
*p = '\0';
owner = xstrdup(pwd->pw_gecos ? pwd->pw_gecos : pwd->pw_name);
}
repo->owner = owner;
p = fmt("%s/description", path);
if (!stat(p, &st))
readfile(p, &repo->desc, &size);
if (!repo->readme) {
p = fmt("%s/README.html", path);
if (!stat(p, &st))
repo->readme = "README.html";
}
if (ctx.cfg.section_from_path) {
n = ctx.cfg.section_from_path;
if (n > 0) {
slash = rel;
while (slash && n && (slash = strchr(slash, '/')))
n--;
} else {
slash = rel + strlen(rel);
while (slash && n && (slash = xstrrchr(rel, slash, '/')))
n++;
}
if (slash && !n) {
*slash = '\0';
repo->section = xstrdup(rel);
*slash = '/';
if (!prefixcmp(repo->name, repo->section)) {
repo->name += strlen(repo->section);
if (*repo->name == '/')
repo->name++;
}
}
}
p = fmt("%s/cgitrc", path);
if (!stat(p, &st)) {
config_fn = fn;
parse_configfile(xstrdup(p), &repo_config);
}
}
static void scan_path(const char *base, const char *path, repo_config_fn fn)
{
DIR *dir = opendir(path);
struct dirent *ent;
char *buf;
struct stat st;
if (!dir) {
fprintf(stderr, "Error opening directory %s: %s (%d)\n",
path, strerror(errno), errno);
return;
}
if (is_git_dir(path)) {
add_repo(base, path, fn);
goto end;
}
if (is_git_dir(fmt("%s/.git", path))) {
add_repo(base, fmt("%s/.git", path), fn);
goto end;
}
while((ent = readdir(dir)) != NULL) {
if (ent->d_name[0] == '.') {
if (ent->d_name[1] == '\0')
continue;
if (ent->d_name[1] == '.' && ent->d_name[2] == '\0')
continue;
if (!ctx.cfg.scan_hidden_path)
continue;
}
buf = malloc(strlen(path) + strlen(ent->d_name) + 2);
if (!buf) {
fprintf(stderr, "Alloc error on %s: %s (%d)\n",
path, strerror(errno), errno);
exit(1);
}
sprintf(buf, "%s/%s", path, ent->d_name);
if (stat(buf, &st)) {
fprintf(stderr, "Error checking path %s: %s (%d)\n",
buf, strerror(errno), errno);
free(buf);
continue;
}
if (S_ISDIR(st.st_mode))
scan_path(base, buf, fn);
free(buf);
}
end:
closedir(dir);
}
#define lastc(s) s[strlen(s) - 1]
void scan_projects(const char *path, const char *projectsfile, repo_config_fn fn)
{
char line[MAX_PATH * 2], *z;
FILE *projects;
int err;
projects = fopen(projectsfile, "r");
if (!projects) {
fprintf(stderr, "Error opening projectsfile %s: %s (%d)\n",
projectsfile, strerror(errno), errno);
return;
}
while (fgets(line, sizeof(line), projects) != NULL) {
for (z = &lastc(line);
strlen(line) && strchr("\n\r", *z);
z = &lastc(line))
*z = '\0';
if (strlen(line))
scan_path(path, fmt("%s/%s", path, line), fn);
}
if ((err = ferror(projects))) {
fprintf(stderr, "Error reading from projectsfile %s: %s (%d)\n",
projectsfile, strerror(err), err);
}
fclose(projects);
}
void scan_tree(const char *path, repo_config_fn fn)
{
scan_path(path, path, fn);
}