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https://github.com/fish-shell/fish-shell.git
synced 2026-06-21 15:01:16 -03:00
Migrate source files into src/ directory
This change moves source files into a src/ directory, and puts object files into an obj/ directory. The Makefile and xcode project are updated accordingly. Fixes #1866
This commit is contained in:
ridiculousfish
407
src/path.cpp
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407
src/path.cpp
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#include "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <wchar.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <errno.h>
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#include <libgen.h>
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#include "fallback.h"
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#include "util.h"
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#include "common.h"
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#include "env.h"
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#include "wutil.h"
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#include "path.h"
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#include "expand.h"
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/**
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Unexpected error in path_get_path()
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*/
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#define MISSING_COMMAND_ERR_MSG _( L"Error while searching for command '%ls'" )
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static bool path_get_path_core(const wcstring &cmd, wcstring *out_path, const env_var_t &bin_path_var)
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{
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int err = ENOENT;
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debug(3, L"path_get_path( '%ls' )", cmd.c_str());
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/* If the command has a slash, it must be a full path */
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if (cmd.find(L'/') != wcstring::npos)
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{
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if (waccess(cmd, X_OK)==0)
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{
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struct stat buff;
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if (wstat(cmd, &buff))
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{
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return false;
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}
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if (S_ISREG(buff.st_mode))
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{
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if (out_path)
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out_path->assign(cmd);
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return true;
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}
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else
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{
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errno = EACCES;
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return false;
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}
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}
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else
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{
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return false;
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}
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}
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else
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{
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wcstring bin_path;
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if (! bin_path_var.missing())
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{
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bin_path = bin_path_var;
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}
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else
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{
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if (contains(PREFIX L"/bin", L"/bin", L"/usr/bin"))
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{
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bin_path = L"/bin" ARRAY_SEP_STR L"/usr/bin";
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}
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else
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{
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bin_path = L"/bin" ARRAY_SEP_STR L"/usr/bin" ARRAY_SEP_STR PREFIX L"/bin";
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}
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}
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wcstring nxt_path;
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wcstokenizer tokenizer(bin_path, ARRAY_SEP_STR);
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while (tokenizer.next(nxt_path))
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{
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if (nxt_path.empty())
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continue;
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append_path_component(nxt_path, cmd);
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if (waccess(nxt_path, X_OK)==0)
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{
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struct stat buff;
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if (wstat(nxt_path, &buff)==-1)
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{
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if (errno != EACCES)
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{
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wperror(L"stat");
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}
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continue;
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}
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if (S_ISREG(buff.st_mode))
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{
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if (out_path)
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out_path->swap(nxt_path);
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return true;
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}
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err = EACCES;
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}
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else
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{
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switch (errno)
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{
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case ENOENT:
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case ENAMETOOLONG:
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case EACCES:
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case ENOTDIR:
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break;
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default:
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{
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debug(1,
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MISSING_COMMAND_ERR_MSG,
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nxt_path.c_str());
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wperror(L"access");
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}
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}
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}
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}
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}
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errno = err;
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return false;
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}
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bool path_get_path(const wcstring &cmd, wcstring *out_path, const env_vars_snapshot_t &vars)
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{
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return path_get_path_core(cmd, out_path, vars.get(L"PATH"));
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}
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bool path_get_path(const wcstring &cmd, wcstring *out_path)
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{
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return path_get_path_core(cmd, out_path, env_get_string(L"PATH"));
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}
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bool path_get_cdpath(const wcstring &dir, wcstring *out, const wchar_t *wd, const env_vars_snapshot_t &env_vars)
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{
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int err = ENOENT;
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if (dir.empty())
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return false;
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if (wd)
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{
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size_t len = wcslen(wd);
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assert(wd[len - 1] == L'/');
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}
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wcstring_list_t paths;
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if (dir.at(0) == L'/')
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{
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/* Absolute path */
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paths.push_back(dir);
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}
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else if (string_prefixes_string(L"./", dir) ||
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string_prefixes_string(L"../", dir) ||
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dir == L"." || dir == L"..")
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{
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/* Path is relative to the working directory */
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wcstring path;
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if (wd)
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path.append(wd);
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path.append(dir);
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paths.push_back(path);
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}
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else
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{
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// Respect CDPATH
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env_var_t path = env_vars.get(L"CDPATH");
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if (path.missing_or_empty())
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path = L"."; //We'll change this to the wd if we have one
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wcstring nxt_path;
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wcstokenizer tokenizer(path, ARRAY_SEP_STR);
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while (tokenizer.next(nxt_path))
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{
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if (nxt_path == L"." && wd != NULL)
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{
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// nxt_path is just '.', and we have a working directory, so use the wd instead
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// TODO: if nxt_path starts with ./ we need to replace the . with the wd
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nxt_path = wd;
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}
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expand_tilde(nxt_path);
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// debug( 2, L"woot %ls\n", expanded_path.c_str() );
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if (nxt_path.empty())
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continue;
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wcstring whole_path = nxt_path;
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append_path_component(whole_path, dir);
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paths.push_back(whole_path);
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}
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}
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bool success = false;
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for (wcstring_list_t::const_iterator iter = paths.begin(); iter != paths.end(); ++iter)
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{
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struct stat buf;
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const wcstring &dir = *iter;
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if (wstat(dir, &buf) == 0)
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{
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if (S_ISDIR(buf.st_mode))
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{
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success = true;
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if (out)
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out->assign(dir);
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break;
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}
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else
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{
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err = ENOTDIR;
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}
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}
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}
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if (! success)
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errno = err;
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return success;
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}
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bool path_can_be_implicit_cd(const wcstring &path, wcstring *out_path, const wchar_t *wd, const env_vars_snapshot_t &vars)
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{
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wcstring exp_path = path;
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expand_tilde(exp_path);
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bool result = false;
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if (string_prefixes_string(L"/", exp_path) ||
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string_prefixes_string(L"./", exp_path) ||
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string_prefixes_string(L"../", exp_path) ||
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string_suffixes_string(L"/", exp_path) ||
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exp_path == L"..")
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{
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/* These paths can be implicit cd, so see if you cd to the path. Note that a single period cannot (that's used for sourcing files anyways) */
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result = path_get_cdpath(exp_path, out_path, wd, vars);
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}
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return result;
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}
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static wcstring path_create_config()
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{
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bool done = false;
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wcstring res;
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const env_var_t xdg_dir = env_get_string(L"XDG_CONFIG_HOME");
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if (! xdg_dir.missing())
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{
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res = xdg_dir + L"/fish";
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if (!create_directory(res))
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{
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done = true;
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}
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}
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else
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{
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const env_var_t home = env_get_string(L"HOME");
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if (! home.missing())
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{
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res = home + L"/.config/fish";
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if (!create_directory(res))
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{
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done = true;
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}
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}
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}
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if (! done)
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{
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res.clear();
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debug(0, _(L"Unable to create a configuration directory for fish. Your personal settings will not be saved. Please set the $XDG_CONFIG_HOME variable to a directory where the current user has write access."));
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}
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return res;
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}
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/* Cache the config path */
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bool path_get_config(wcstring &path)
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{
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static const wcstring result = path_create_config();
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path = result;
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return ! result.empty();
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}
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__attribute__((unused))
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static void replace_all(wcstring &str, const wchar_t *needle, const wchar_t *replacement)
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{
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size_t needle_len = wcslen(needle);
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size_t offset = 0;
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while ((offset = str.find(needle, offset)) != wcstring::npos)
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{
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str.replace(offset, needle_len, replacement);
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offset += needle_len;
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}
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}
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void path_make_canonical(wcstring &path)
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{
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// Ignore trailing slashes, unless it's the first character
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size_t len = path.size();
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while (len > 1 && path.at(len - 1) == L'/')
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len--;
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// Turn runs of slashes into a single slash
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size_t trailing = 0;
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bool prev_was_slash = false;
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for (size_t leading = 0; leading < len; leading++)
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{
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wchar_t c = path.at(leading);
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bool is_slash = (c == '/');
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if (! prev_was_slash || ! is_slash)
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{
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// This is either the first slash in a run, or not a slash at all
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path.at(trailing++) = c;
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}
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prev_was_slash = is_slash;
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}
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assert(trailing <= len);
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if (trailing < len)
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path.resize(trailing);
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}
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bool paths_are_equivalent(const wcstring &p1, const wcstring &p2)
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{
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if (p1 == p2)
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return true;
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size_t len1 = p1.size(), len2 = p2.size();
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// Ignore trailing slashes after the first character
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while (len1 > 1 && p1.at(len1 - 1) == L'/') len1--;
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while (len2 > 1 && p2.at(len2 - 1) == L'/') len2--;
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// Start walking
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size_t idx1 = 0, idx2 = 0;
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while (idx1 < len1 && idx2 < len2)
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{
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wchar_t c1 = p1.at(idx1), c2 = p2.at(idx2);
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// If the characters are different, the strings are not equivalent
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if (c1 != c2)
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break;
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idx1++;
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idx2++;
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// If the character was a slash, walk forwards until we hit the end of the string, or a non-slash
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// Note the first condition is invariant within the loop
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while (c1 == L'/' && idx1 < len1 && p1.at(idx1) == L'/') idx1++;
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while (c2 == L'/' && idx2 < len2 && p2.at(idx2) == L'/') idx2++;
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}
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// We matched if we consumed all of the characters in both strings
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return idx1 == len1 && idx2 == len2;
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}
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bool path_is_valid(const wcstring &path, const wcstring &working_directory)
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{
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bool path_is_valid;
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/* Some special paths are always valid */
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if (path.empty())
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{
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path_is_valid = false;
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}
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else if (path == L"." || path == L"./")
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{
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path_is_valid = true;
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}
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else if (path == L".." || path == L"../")
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{
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path_is_valid = (! working_directory.empty() && working_directory != L"/");
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}
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else if (path.at(0) != '/')
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{
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/* Prepend the working directory. Note that we know path is not empty here. */
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wcstring tmp = working_directory;
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tmp.append(path);
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path_is_valid = (0 == waccess(tmp, F_OK));
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}
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else
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{
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/* Simple check */
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path_is_valid = (0 == waccess(path, F_OK));
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}
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return path_is_valid;
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}
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bool paths_are_same_file(const wcstring &path1, const wcstring &path2)
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{
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if (paths_are_equivalent(path1, path2))
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return true;
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struct stat s1, s2;
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if (wstat(path1, &s1) == 0 && wstat(path2, &s2) == 0)
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{
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return s1.st_ino == s2.st_ino && s1.st_dev == s2.st_dev;
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}
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else
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{
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return false;
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}
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}
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