Macintosh-SW/mpw-shell
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look for ~/mpw, /usr/share/mpw, /usr/local/mpw

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This commit is contained in:
Kelvin Sherlock 2016-10-08 09:55:31 -04:00
parent ed96470e18
commit 474b10ccaa
1 changed files with 36 additions and 18 deletions
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54
mpw-shell.cpp
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@ -41,32 +41,50 @@ namespace fs = filesystem;
bool utf8 = false;
fs::path home() {
const char *cp = getenv("HOME");
if (cp && cp) {
auto pw = getpwuid(getuid());
if (pw) return fs::path(pw->pw_dir);
}
return fs::path();
}
fs::path root() {
static fs::path root;
bool init = false;
if (root.empty()) {
const char *cp = getenv("HOME");
if (!cp || !*cp) {
auto pw = getpwuid(getuid());
if (!pw) {
fprintf(stderr,"### Unable to determine home directory\n.");
exit(EX_NOUSER);
static std::array<filesystem::path, 2> locations = { {
"/usr/share/mpw/",
"/usr/local/share/mpw/"
} };
if (!init) {
init = true;
std::error_code ec;
fs::path p;
p = home();
if (!p.empty()) {
p /= "mpw/";
if (fs::is_directory(p, ec)) {
root = std::move(p);
return root;
}
cp = pw->pw_dir;
}
root = cp;
root /= "mpw/";
fs::error_code ec;
fs::file_status st = status(root, ec);
if (!fs::exists(st)) {
fprintf(stderr, "### Warning: %s does not exist.\n", root.c_str());
}
else if (!fs::is_directory(st)) {
fprintf(stderr, "### Warning: %s is not a directory.\n", root.c_str());
for (fs::path p : locations) {
p /= "mpw/";
if (fs::is_directory(p, ec)) {
root = std::move(p);
return root;
}
}
fprintf(stderr, "### Warning: Unable to find mpw directory.\n");
}
return root;
}