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Shell: fix crash when using cd - and OLDPWD is null

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Tim Morgan 2019-09-13 07:42:47 -05:00 • committed by Andreas Kling
parent 3d4935a223
commit af6948afe0
1 changed files with 2 additions and 0 deletions
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2
Shell/main.cpp
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@ -85,6 +85,8 @@ static int sh_cd(int argc, char** argv)
} else { } else {
if (strcmp(argv[1], "-") == 0) { if (strcmp(argv[1], "-") == 0) {
char* oldpwd = getenv("OLDPWD"); char* oldpwd = getenv("OLDPWD");
if (oldpwd == nullptr)
return 1;
size_t len = strlen(oldpwd); size_t len = strlen(oldpwd);
ASSERT(len + 1 <= PATH_MAX); ASSERT(len + 1 <= PATH_MAX);
memcpy(pathbuf, oldpwd, len + 1); memcpy(pathbuf, oldpwd, len + 1);