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enter_repo: do not modify input

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entr_repo(..., 0) currently modifies the input to strip away
trailing slashes. This means that we some times need to copy the
input to keep the original.

Change it to unconditionally copy it into the used_path buffer so
we can safely use the input without having to copy it. Also store
a working copy in validated_path up-front before we start
resolving anything.

Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>
Signed-off-by: Phil Hord <hordp@cisco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Erik Faye-Lund
2011-10-04 16:02:00 -04:00
committed by Junio C Hamano
parent 703f05ad58
commit 1c64b48e67
3 changed files with 15 additions and 19 deletions
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28
path.c
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@ -283,7 +283,7 @@ return_null:
* links. User relative paths are also returned as they are given,
* except DWIM suffixing.
*/
char *enter_repo(char *path, int strict)
const char *enter_repo(const char *path, int strict)
{
static char used_path[PATH_MAX];
static char validated_path[PATH_MAX];
@ -297,14 +297,16 @@ char *enter_repo(char *path, int strict)
};
int len = strlen(path);
int i;
while ((1 < len) && (path[len-1] == '/')) {
path[len-1] = 0;
while ((1 < len) && (path[len-1] == '/'))
len--;
}
if (PATH_MAX <= len)
return NULL;
if (path[0] == '~') {
char *newpath = expand_user_path(path);
strncpy(used_path, path, len); used_path[len] = 0 ;
strcpy(validated_path, used_path);
if (used_path[0] == '~') {
char *newpath = expand_user_path(used_path);
if (!newpath || (PATH_MAX - 10 < strlen(newpath))) {
free(newpath);
return NULL;
@ -316,24 +318,18 @@ char *enter_repo(char *path, int strict)
* anyway.
*/
strcpy(used_path, newpath); free(newpath);
strcpy(validated_path, path);
path = used_path;
}
else if (PATH_MAX - 10 < len)
return NULL;
else {
path = strcpy(used_path, path);
strcpy(validated_path, path);
}
len = strlen(path);
len = strlen(used_path);
for (i = 0; suffix[i]; i++) {
strcpy(path + len, suffix[i]);
if (!access(path, F_OK)) {
strcpy(used_path + len, suffix[i]);
if (!access(used_path, F_OK)) {
strcat(validated_path, suffix[i]);
break;
}
}
if (!suffix[i] || chdir(path))
if (!suffix[i] || chdir(used_path))
return NULL;
path = validated_path;
}