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Simplify some duplicated path checks

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This has one functional difference, in that we now report non-EACCESS
errors even for relative paths. I consider that to be a plus.

Some other sites might benefit from this, let's look into that later.
This commit is contained in:
Fabian Homborg 2020-12-15 18:15:59 +01:00
parent 0f6669f43c
commit 31166f4731
1 changed files with 15 additions and 13 deletions
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28
src/path.cpp
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@ -122,6 +122,17 @@ bool path_get_path(const wcstring &cmd, wcstring *out_path, const environment_t
return path_get_path_core(cmd, out_path, vars.get(L"PATH"));
}
bool path_is_executable(const std::string &path) {
if (access(path.c_str(), X_OK)) return false;
struct stat buff;
if (stat(path.c_str(), &buff) == -1) {
if (errno != EACCES) wperror(L" stat");
return false;
}
if (!S_ISREG(buff.st_mode)) return false;
return true;
}
wcstring_list_t path_get_paths(const wcstring &cmd, const environment_t &vars) {
FLOGF(path, L"path_get_paths('%ls')", cmd.c_str());
wcstring_list_t paths;
@ -129,11 +140,8 @@ wcstring_list_t path_get_paths(const wcstring &cmd, const environment_t &vars) {
// If the command has a slash, it must be an absolute or relative path and thus we don't bother
// looking for matching commands in the PATH var.
if (cmd.find(L'/') != wcstring::npos) {
struct stat buff;
if (wstat(cmd, &buff)) return paths;
if (!S_ISREG(buff.st_mode)) return paths;
if (waccess(cmd, X_OK)) return paths;
paths.push_back(cmd);
std::string narrow = wcs2string(cmd);
if (path_is_executable(narrow)) paths.push_back(cmd);
return paths;
}
@ -144,14 +152,8 @@ wcstring_list_t path_get_paths(const wcstring &cmd, const environment_t &vars) {
for (auto path : pathsv) {
if (path.empty()) continue;
append_path_component(path, cmd);
if (waccess(path, X_OK) == 0) {
struct stat buff;
if (wstat(path, &buff) == -1) {
if (errno != EACCES) wperror(L"stat");
continue;
}
if (S_ISREG(buff.st_mode)) paths.push_back(path);
}
std::string narrow = wcs2string(path);
if (path_is_executable(narrow)) paths.push_back(path);
}
return paths;