aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/ui-repolist.c
diff options
context:
space:
mode:
Diffstat (limited to 'ui-repolist.c')
-rw-r--r--ui-repolist.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/ui-repolist.c b/ui-repolist.c
index ab050c7..c23232c 100644
--- a/ui-repolist.c
+++ b/ui-repolist.c
@@ -19,7 +19,8 @@ time_t read_agefile(char *path)
if (!(f = fopen(path, "r")))
return -1;
- fgets(buf, sizeof(buf), f);
+ if (fgets(buf, sizeof(buf), f) == NULL)
+ return -1;
fclose(f);
if (parse_date(buf, buf2, sizeof(buf2)))
return strtoul(buf2, NULL, 10);
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-11-06 20:12:58 +0000
5' href='#n95'>95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 
/* ui-snapshot.c: generate snapshot of a commit
 *
 * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
 *
 * Licensed under GNU General Public License v2
 *   (see COPYING for full license text)
 */

#include "cgit.h"
#include "ui-snapshot.h"
#include "html.h"
#include "ui-shared.h"

static int write_archive_type(const char *format, const char *hex, const char *prefix)
{
	struct argv_array argv = ARGV_ARRAY_INIT;
	const char **nargv;
	int result;
	argv_array_push(&argv, "snapshot");
	argv_array_push(&argv, format);
	if (prefix) {
		struct strbuf buf = STRBUF_INIT;
		strbuf_addstr(&buf, prefix);
		strbuf_addch(&buf, '/');
		argv_array_push(&argv, "--prefix");
		argv_array_push(&argv, buf.buf);
		strbuf_release(&buf);
	}
	argv_array_push(&argv, hex);
	/*
	 * Now we need to copy the pointers to arguments into a new
	 * structure because write_archive will rearrange its arguments
	 * which may result in duplicated/missing entries causing leaks
	 * or double-frees in argv_array_clear.
	 */
	nargv = xmalloc(sizeof(char *) * (argv.argc + 1));
	/* argv_array guarantees a trailing NULL entry. */
	memcpy(nargv, argv.argv, sizeof(char *) * (argv.argc + 1));

	result = write_archive(argv.argc, nargv, NULL, 1, NULL, 0);
	argv_array_clear(&argv);
	free(nargv);
	return result;
}

static int write_tar_archive(const char *hex, const char *prefix)
{
	return write_archive_type("--format=tar", hex, prefix);
}

static int write_zip_archive(const char *hex, const char *prefix)
{
	return write_archive_type("--format=zip", hex, prefix);
}

static int write_compressed_tar_archive(const char *hex,
					const char *prefix,
					char *filter_argv[])
{
	int rv;
	struct cgit_filter f;

	f.cmd = filter_argv[0];
	f.argv = filter_argv;
	cgit_open_filter(&f);
	rv = write_tar_archive(hex, prefix);
	cgit_close_filter(&f);
	return rv;
}

static int write_tar_gzip_archive(const char *hex, const char *prefix)
{
	char *argv[] = { "gzip", "-n", NULL };
	return write_compressed_tar_archive(hex, prefix, argv);
}

static int write_tar_bzip2_archive(const char *hex, const char *prefix)
{
	char *argv[] = { "bzip2", NULL };
	return write_compressed_tar_archive(hex, prefix, argv);
}

static int write_tar_xz_archive(const char *hex, const char *prefix)
{
	char *argv[] = { "xz", NULL };
	return write_compressed_tar_archive(hex, prefix, argv);
}

const struct cgit_snapshot_format cgit_snapshot_formats[] = {
	{ ".zip", "application/x-zip", write_zip_archive, 0x01 },
	{ ".tar.gz", "application/x-gzip", write_tar_gzip_archive, 0x02 },
	{ ".tar.bz2", "application/x-bzip2", write_tar_bzip2_archive, 0x04 },
	{ ".tar", "application/x-tar", write_tar_archive, 0x08 },
	{ ".tar.xz", "application/x-xz", write_tar_xz_archive, 0x10 },
	{ NULL }
};

static const struct cgit_snapshot_format *get_format(const char *filename)
{
	const struct cgit_snapshot_format *fmt;

	for (fmt = cgit_snapshot_formats; fmt->suffix; fmt++) {
		if (!suffixcmp(filename, fmt->suffix))
			return fmt;
	}
	return NULL;
}

static int make_snapshot(const struct cgit_snapshot_format *format,
			 const char *hex, const char *prefix,
			 const char *filename)
{
	unsigned char sha1[20];

	if (get_sha1(hex, sha1)) {
		cgit_print_error("Bad object id: %s", hex);
		return 1;
	}
	if (!lookup_commit_reference(sha1)) {
		cgit_print_error("Not a commit reference: %s", hex);
		return 1;
	}
	ctx.page.mimetype = xstrdup(format->mimetype);
	ctx.page.filename = xstrdup(filename);
	cgit_print_http_headers(&ctx);
	format->write_func(hex, prefix);
	return 0;
}

/* Try to guess the requested revision from the requested snapshot name.
 * First the format extension is stripped, e.g. "cgit-0.7.2.tar.gz" become
 * "cgit-0.7.2". If this is a valid commit object name we've got a winner.
 * Otherwise, if the snapshot name has a prefix matching the result from
 * repo_basename(), we strip the basename and any following '-' and '_'
 * characters ("cgit-0.7.2" -> "0.7.2") and check the resulting name once
 * more. If this still isn't a valid commit object name, we check if pre-
 * pending a 'v' or a 'V' to the remaining snapshot name ("0.7.2" ->
 * "v0.7.2") gives us something valid.
 */
static const char *get_ref_from_filename(const char *url, const char *filename,
					 const struct cgit_snapshot_format *format)
{
	const char *reponame;
	unsigned char sha1[20];
	struct strbuf snapshot = STRBUF_INIT;
	int result = 1;

	strbuf_addstr(&snapshot, filename);
	strbuf_setlen(&snapshot, snapshot.len - strlen(format->suffix));

	if (get_sha1(snapshot.buf, sha1) == 0)
		goto out;

	reponame = cgit_repobasename(url);
	if (prefixcmp(snapshot.buf, reponame) == 0) {
		const char *new_start = snapshot.buf;
		new_start += strlen(reponame);
		while (new_start && (*new_start == '-' || *new_start == '_'))
			new_start++;
		strbuf_splice(&snapshot, 0, new_start - snapshot.buf, "", 0);
	}

	if (get_sha1(snapshot.buf, sha1) == 0)
		goto out;

	strbuf_insert(&snapshot, 0, "v", 1);
	if (get_sha1(snapshot.buf, sha1) == 0)
		goto out;

	strbuf_splice(&snapshot, 0, 1, "V", 1);
	if (get_sha1(snapshot.buf, sha1) == 0)
		goto out;

	result = 0;
	strbuf_release(&snapshot);

out:
	return result ? strbuf_detach(&snapshot, NULL) : NULL;
}

__attribute__((format (printf, 1, 2)))
static void show_error(char *fmt, ...)
{
	va_list ap;

	ctx.page.mimetype = "text/html";
	cgit_print_http_headers(&ctx);
	cgit_print_docstart(&ctx);
	cgit_print_pageheader(&ctx);
	va_start(ap, fmt);
	cgit_vprint_error(fmt, ap);
	va_end(ap);
	cgit_print_docend();
}

void cgit_print_snapshot(const char *head, const char *hex,
			 const char *filename, int snapshots, int dwim)
{
	const struct cgit_snapshot_format* f;
	char *prefix = NULL;

	if (!filename) {
		show_error("No snapshot name specified");
		return;
	}

	f = get_format(filename);
	if (!f) {
		show_error("Unsupported snapshot format: %s", filename);
		return;
	}

	if (!hex && dwim) {
		hex = get_ref_from_filename(ctx.repo->url, filename, f);
		if (hex == NULL) {
			html_status(404, "Not found", 0);
			return;
		}
		prefix = xstrdup(filename);
		prefix[strlen(filename) - strlen(f->suffix)] = '\0';
	}

	if (!hex)
		hex = head;

	if (!prefix)
		prefix = xstrdup(cgit_repobasename(ctx.repo->url));

	make_snapshot(f, hex, prefix, filename);
	free(prefix);
}
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-11-06 20:13:03 +0000