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-rw-r--r--init-db.c142
1 files changed, 142 insertions, 0 deletions
diff --git a/init-db.c b/init-db.c
index c78c495..fcb55f6 100644
--- a/init-db.c
+++ b/init-db.c
@@ -15,6 +15,147 @@ static void safe_create_dir(const char *dir)
}
}
+static int copy_file(const char *dst, const char *src, int mode)
+{
+ int fdi, fdo;
+
+ mode = (mode & 0111) ? 0777 : 0666;
+ if ((fdi = open(src, O_RDONLY)) < 0)
+ return fdi;
+ if ((fdo = open(dst, O_WRONLY | O_CREAT | O_EXCL, mode)) < 0) {
+ close(fdi);
+ return fdo;
+ }
+ while (1) {
+ char buf[BUFSIZ];
+ ssize_t leni, leno, ofs;
+ leni = read(fdi, buf, sizeof(buf));
+ if (leni < 0) {
+ error_return:
+ close(fdo);
+ close(fdi);
+ return -1;
+ }
+ if (!leni)
+ break;
+ ofs = 0;
+ do {
+ leno = write(fdo, buf+ofs, leni);
+ if (leno < 0)
+ goto error_return;
+ leni -= leno;
+ ofs += leno;
+ } while (0 < leni);
+ }
+ close(fdo);
+ close(fdi);
+ return 0;
+}
+
+static void copy_templates_1(char *path, int baselen,
+ char *template, int template_baselen,
+ DIR *dir)
+{
+ struct dirent *de;
+
+ /* Note: if ".git/hooks" file exists in the repository being
+ * re-initialized, /etc/core-git/templates/hooks/update would
+ * cause git-init-db to fail here. I think this is sane but
+ * it means that the set of templates we ship by default, along
+ * with the way the namespace under .git/ is organized, should
+ * be really carefully chosen.
+ */
+ safe_create_dir(path);
+ while ((de = readdir(dir)) != NULL) {
+ struct stat st_git, st_template;
+ int namelen;
+ int exists = 0;
+
+ if (de->d_name[0] == '.')
+ continue;
+ namelen = strlen(de->d_name);
+ if ((PATH_MAX <= baselen + namelen) ||
+ (PATH_MAX <= template_baselen + namelen))
+ die("insanely long template name %s", de->d_name);
+ memcpy(path + baselen, de->d_name, namelen+1);
+ memcpy(template + template_baselen, de->d_name, namelen+1);
+ if (lstat(path, &st_git)) {
+ if (errno != ENOENT)
+ die("cannot stat %s", path);
+ }
+ else
+ exists = 1;
+
+ if (lstat(template, &st_template))
+ die("cannot stat template %s", template);
+
+ if (S_ISDIR(st_template.st_mode)) {
+ DIR *subdir = opendir(template);
+ int baselen_sub = baselen + namelen;
+ int template_baselen_sub = template_baselen + namelen;
+ if (!subdir)
+ die("cannot opendir %s", template);
+ path[baselen_sub++] =
+ template[template_baselen_sub++] = '/';
+ path[baselen_sub] =
+ template[template_baselen_sub] = 0;
+ copy_templates_1(path, baselen_sub,
+ template, template_baselen_sub,
+ subdir);
+ closedir(subdir);
+ }
+ else if (exists)
+ continue;
+ else if (S_ISLNK(st_template.st_mode)) {
+ char lnk[256];
+ int len;
+ len = readlink(template, lnk, sizeof(lnk));
+ if (len < 0)
+ die("cannot readlink %s", template);
+ if (sizeof(lnk) <= len)
+ die("insanely long symlink %s", template);
+ lnk[len] = 0;
+ if (symlink(lnk, path))
+ die("cannot symlink %s %s", lnk, path);
+ }
+ else if (S_ISREG(st_template.st_mode)) {
+ if (copy_file(path, template, st_template.st_mode))
+ die("cannot copy %s to %s", template, path);
+ }
+ else
+ error("ignoring template %s", template);
+ }
+}
+
+static void copy_templates(const char *git_dir)
+{
+ char path[PATH_MAX];
+ char template_path[PATH_MAX];
+ char *template_dir;
+ int len, template_len;
+ DIR *dir;
+
+ strcpy(path, git_dir);
+ len = strlen(path);
+ template_dir = gitenv(TEMPLATE_DIR_ENVIRONMENT);
+ if (!template_dir)
+ template_dir = DEFAULT_GIT_TEMPLATE_ENVIRONMENT;
+ strcpy(template_path, template_dir);
+ template_len = strlen(template_path);
+ if (template_path[template_len-1] != '/') {
+ template_path[template_len++] = '/';
+ template_path[template_len] = 0;
+ }
+
+ dir = opendir(template_path);
+ if (!dir)
+ return;
+ copy_templates_1(path, len,
+ template_path, template_len,
+ dir);
+ closedir(dir);
+}
+
static void create_default_files(const char *git_dir)
{
unsigned len = strlen(git_dir);
@@ -48,6 +189,7 @@ static void create_default_files(const char *git_dir)
exit(1);
}
}
+ copy_templates(path);
}
/*