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Fix users of prefix_path() to free() only when necessary

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Unfortunately, prefix_path() sometimes returns a newly xmalloc()ed buffer,
and in other cases it returns a substring!

For example, when calling

	git update-index ./hello.txt

prefix_path() returns "hello.txt", but does not allocate a new buffer. The
original code only checked if the result of prefix_path() was different from
what was passed in, and thusly trigger a segmentation fault.

Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Johannes Schindelin 2006-05-07 00:02:53 +02:00 committed by Junio C Hamano
parent 22293b9c41
commit 0cc9e70c4c
2 changed files with 6 additions and 6 deletions
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4
checkout-index.c
View File

@ -277,7 +277,7 @@ int main(int argc, char **argv)
die("git-checkout-index: don't mix '--stdin' and explicit filenames");
p = prefix_path(prefix, prefix_length, arg);
checkout_file(p);
if (p != arg)
if (p < arg || p > arg + strlen(arg))
free((char*)p);
}
@ -299,7 +299,7 @@ int main(int argc, char **argv)
path_name = buf.buf;
p = prefix_path(prefix, prefix_length, path_name);
checkout_file(p);
if (p != path_name)
if (p < path_name || p > path_name + strlen(path_name))
free((char *)p);
if (path_name != buf.buf)
free(path_name);

8
update-index.c
View File

@ -382,7 +382,7 @@ static void update_one(const char *path, const char *prefix, int prefix_length)
die("Unable to process file %s", path);
report("add '%s'", path);
free_return:
if (p != path)
if (p < path || p > path + strlen(path))
free((char*)p);
}
@ -596,7 +596,7 @@ static int do_unresolve(int ac, const char **av,
const char *arg = av[i];
const char *p = prefix_path(prefix, prefix_length, arg);
err |= unresolve_one(p);
if (p != arg)
if (p < arg || p > arg + strlen(arg))
free((char*)p);
}
return err;
@ -610,7 +610,7 @@ static int do_reupdate(int ac, const char **av,
*/
int pos;
int has_head = 1;
char **pathspec = get_pathspec(prefix, av + 1);
const char **pathspec = get_pathspec(prefix, av + 1);
if (read_ref(git_path("HEAD"), head_sha1))
/* If there is no HEAD, that means it is an initial
@ -802,7 +802,7 @@ int main(int argc, const char **argv)
update_one(p, NULL, 0);
if (set_executable_bit)
chmod_path(set_executable_bit, p);
if (p != path_name)
if (p < path_name || p > path_name + strlen(path_name))
free((char*) p);
if (path_name != buf.buf)
free(path_name);