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grep: accept relative paths outside current working directory 

"git grep" would barf at relative paths pointing outside the current
working directory (or subdirectories thereof). Use quote_path_relative(),
which can handle such cases just fine.

[jc: added tests.]

Signed-off-by: Clemens Buchacher <drizzd@aon.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Clemens Buchacher 2009-09-05 14:31:17 +02:00 committed by Junio C Hamano
parent 929e37d3df
commit 493b7a08d8
3 changed files with 29 additions and 27 deletions
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38
builtin-grep.c
View File

@ -11,6 +11,7 @@
#include "tree-walk.h"
#include "builtin.h"
#include "grep.h"
#include "quote.h"
#ifndef NO_EXTERNAL_GREP
#ifdef __unix__
@ -114,8 +115,8 @@ static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1, const char
unsigned long size;
char *data;
enum object_type type;
char *to_free = NULL;
int hit;
struct strbuf pathbuf = STRBUF_INIT;
data = read_sha1_file(sha1, &type, &size);
if (!data) {
@ -123,26 +124,13 @@ static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1, const char
return 0;
}
if (opt->relative && opt->prefix_length) {
static char name_buf[PATH_MAX];
char *cp;
int name_len = strlen(name) - opt->prefix_length + 1;
if (!tree_name_len)
name += opt->prefix_length;
else {
if (ARRAY_SIZE(name_buf) <= name_len)
cp = to_free = xmalloc(name_len);
else
cp = name_buf;
memcpy(cp, name, tree_name_len);
strcpy(cp + tree_name_len,
name + tree_name_len + opt->prefix_length);
name = cp;
}
quote_path_relative(name + tree_name_len, -1, &pathbuf, opt->prefix);
strbuf_insert(&pathbuf, 0, name, tree_name_len);
name = pathbuf.buf;
}
hit = grep_buffer(opt, name, data, size);
strbuf_release(&pathbuf);
free(data);
free(to_free);
return hit;
}
@ -152,6 +140,7 @@ static int grep_file(struct grep_opt *opt, const char *filename)
int i;
char *data;
size_t sz;
struct strbuf buf = STRBUF_INIT;
if (lstat(filename, &st) < 0) {
err_ret:
@ -176,8 +165,9 @@ static int grep_file(struct grep_opt *opt, const char *filename)
}
close(i);
if (opt->relative && opt->prefix_length)
filename += opt->prefix_length;
filename = quote_path_relative(filename, -1, &buf, opt->prefix);
i = grep_buffer(opt, filename, data, sz);
strbuf_release(&buf);
free(data);
return i;
}
@ -582,6 +572,7 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
int i;
memset(&opt, 0, sizeof(opt));
opt.prefix = prefix;
opt.prefix_length = (prefix && *prefix) ? strlen(prefix) : 0;
opt.relative = 1;
opt.pathname = 1;
@ -857,15 +848,8 @@ int cmd_grep(int argc, const char **argv, const char *prefix)
verify_filename(prefix, argv[j]);
}
if (i < argc) {
if (i < argc)
paths = get_pathspec(prefix, argv + i);
if (opt.prefix_length && opt.relative) {
/* Make sure we do not get outside of paths */
for (i = 0; paths[i]; i++)
if (strncmp(prefix, paths[i], opt.prefix_length))
die("git grep: cannot generate relative filenames containing '..'");
}
}
else if (prefix) {
paths = xcalloc(2, sizeof(const char *));
paths[0] = prefix;

1
grep.h
View File

@ -59,6 +59,7 @@ struct grep_opt {
struct grep_pat *pattern_list;
struct grep_pat **pattern_tail;
struct grep_expr *pattern_expression;
const char *prefix;
int prefix_length;
regex_t regexp;
unsigned linenum:1;

17
t/t7002-grep.sh
View File

@ -212,4 +212,21 @@ test_expect_success 'grep with CE_VALID file' '
git checkout t/t
'
test_expect_success 'grep from a subdirectory to search wider area (1)' '
mkdir -p s &&
(
cd s && git grep "x x x" ..
)
'
test_expect_success 'grep from a subdirectory to search wider area (2)' '
mkdir -p s &&
(
cd s || exit 1
( git grep xxyyzz .. >out ; echo $? >status )
! test -s out &&
test 1 = $(cat status)
)
'
test_done