mirror of
https://github.com/fish-shell/fish-shell
synced 2024-12-26 04:43:10 +00:00
551 lines
11 KiB
C++
551 lines
11 KiB
C++
#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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bool path_get_path_string(const wcstring &cmd_str, wcstring &output, const env_vars &vars)
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{
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const wchar_t * const cmd = cmd_str.c_str();
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int err = ENOENT;
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debug( 3, L"path_get_path_string( '%ls' )", cmd );
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if(wcschr( cmd, L'/' ) != 0 )
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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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output = cmd_str;
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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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//struct stat buff;
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//wstat( cmd, &buff );
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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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const wchar_t *path = vars.get(L"PATH");
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if( path == 0 )
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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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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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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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wcstokenizer tokenizer(path, ARRAY_SEP_STR);
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wcstring new_cmd;
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while (tokenizer.next(new_cmd))
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{
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size_t path_len = new_cmd.size();
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if (path_len == 0) continue;
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append_path_component(new_cmd, cmd_str);
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if( waccess( new_cmd, X_OK )==0 )
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{
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struct stat buff;
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if( wstat( new_cmd, &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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output = new_cmd;
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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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new_cmd.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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wchar_t *path_get_path( const wchar_t *cmd )
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{
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int err = ENOENT;
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CHECK( cmd, 0 );
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debug( 3, L"path_get_path( '%ls' )", cmd );
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if(wcschr( cmd, L'/' ) != 0 )
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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 0;
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}
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if( S_ISREG(buff.st_mode) )
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return wcsdup( cmd );
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else
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{
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errno = EACCES;
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return 0;
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}
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}
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else
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{
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struct stat buff;
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wstat( cmd, &buff );
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return 0;
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}
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}
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else
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{
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env_var_t path = env_get_string(L"PATH");
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if( path.missing() )
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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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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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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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/*
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Allocate string long enough to hold the whole command
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*/
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wchar_t *new_cmd = (wchar_t *)calloc(wcslen(cmd)+path.size()+2, sizeof(wchar_t) );
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/*
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We tokenize a copy of the path, since strtok modifies
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its arguments
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*/
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wchar_t *path_cpy = wcsdup( path.c_str() );
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wchar_t *state;
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if( (new_cmd==0) || (path_cpy==0) )
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{
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DIE_MEM();
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}
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for( const wchar_t *nxt_path = wcstok( path_cpy, ARRAY_SEP_STR, &state );
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nxt_path != 0;
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nxt_path = wcstok( 0, ARRAY_SEP_STR, &state) )
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{
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int path_len = wcslen( nxt_path );
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wcscpy( new_cmd, nxt_path );
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if( new_cmd[path_len-1] != L'/' )
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{
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new_cmd[path_len++]=L'/';
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}
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wcscpy( &new_cmd[path_len], cmd );
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if( waccess( new_cmd, X_OK )==0 )
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{
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struct stat buff;
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if( wstat( new_cmd, &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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free( path_cpy );
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return new_cmd;
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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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new_cmd );
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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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free( new_cmd );
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free( path_cpy );
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}
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errno = err;
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return 0;
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}
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bool path_get_path_string(const wcstring &cmd, wcstring &output)
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{
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bool success = false;
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wchar_t *tmp = path_get_path(cmd.c_str());
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if (tmp) {
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output = tmp;
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free(tmp);
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success = true;
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}
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return success;
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}
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bool path_get_cdpath_string(const wcstring &dir_str, wcstring &result, const env_vars &vars)
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{
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wchar_t *res = 0;
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int err = ENOENT;
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bool success = false;
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const wchar_t *const dir = dir_str.c_str();
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if( dir[0] == L'/'|| (wcsncmp( dir, L"./", 2 )==0) )
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{
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struct stat buf;
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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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result = dir_str;
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success = true;
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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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else
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{
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const wchar_t *path = L".";
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wcstokenizer tokenizer(path, ARRAY_SEP_STR);
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wcstring next_path;
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while (tokenizer.next(next_path))
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{
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expand_tilde(next_path);
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if (next_path.size() == 0) continue;
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wcstring whole_path = next_path;
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append_path_component(whole_path, dir);
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struct stat buf;
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if( wstat( whole_path, &buf ) == 0 )
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{
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if( S_ISDIR(buf.st_mode) )
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{
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result = whole_path;
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success = true;
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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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else
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{
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if( lwstat( whole_path, &buf ) == 0 )
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{
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err = EROTTEN;
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}
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}
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}
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}
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if( !success )
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{
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errno = err;
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}
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return res;
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}
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wchar_t *path_allocate_cdpath( const wchar_t *dir, const wchar_t *wd )
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{
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wchar_t *res = NULL;
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int err = ENOENT;
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if( !dir )
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return 0;
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if (wd) {
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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[0] == L'/') {
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/* Absolute path */
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paths.push_back(dir);
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} else if (wcsncmp(dir, L"./", 2) == 0 ||
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wcsncmp(dir, L"../", 3) == 0 ||
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wcscmp(dir, L".") == 0 ||
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wcscmp(dir, L"..") == 0) {
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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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} else {
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wchar_t *path_cpy;
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wchar_t *state;
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wchar_t *whole_path;
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env_var_t path = L".";
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path_cpy = wcsdup( path.c_str() );
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for( const wchar_t *nxt_path = wcstok( path_cpy, ARRAY_SEP_STR, &state );
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nxt_path != NULL;
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nxt_path = wcstok( 0, ARRAY_SEP_STR, &state) )
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{
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wchar_t *expanded_path = expand_tilde_compat( wcsdup(nxt_path) );
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// debug( 2, L"woot %ls\n", expanded_path );
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int path_len = wcslen( expanded_path );
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if( path_len == 0 )
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{
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free(expanded_path );
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continue;
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}
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whole_path =
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wcsdupcat( expanded_path,
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( expanded_path[path_len-1] != L'/' )?L"/":L"",
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dir );
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free(expanded_path );
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paths.push_back(whole_path);
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free( whole_path );
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}
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free( path_cpy );
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}
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for (wcstring_list_t::const_iterator iter = paths.begin(); iter != paths.end(); ++iter) {
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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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res = wcsdup(dir.c_str());
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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( !res )
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{
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errno = err;
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}
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return res;
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}
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bool path_can_get_cdpath(const wcstring &in, const wchar_t *wd) {
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wchar_t *tmp = path_allocate_cdpath(in.c_str(), wd);
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bool result = (tmp != NULL);
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free(tmp);
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return result;
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}
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bool path_get_config(wcstring &path)
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{
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int done = 0;
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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 = 1;
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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 = 1;
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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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path = res;
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return true;
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}
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else
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{
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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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return false;
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}
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}
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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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/* Remove double slashes */
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size_t size;
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do {
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size = path.size();
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replace_all(path, L"//", L"/");
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} while (path.size() != size);
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/* Remove trailing slashes */
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while (size--) {
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if (path.at(size) != L'/')
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break;
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}
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/* Now size is either -1 (if the entire string was slashes) or is the index of the last non-slash character. Either way this will set it to the correct size. */
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path.resize(size+1);
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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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path_is_valid = false;
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} else if (path == L"." || path == L"./") {
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path_is_valid = true;
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} else if (path == L".." || path == L"../") {
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path_is_valid = (! working_directory.empty() && working_directory != L"/");
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} else if (path.at(0) != '/') {
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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.c_str(), F_OK));
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} else {
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/* Simple check */
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path_is_valid = (0 == waccess(path.c_str(), 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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if (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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return s1.st_ino == s2.st_ino && s1.st_dev == s2.st_dev;
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} else {
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return false;
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}
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}
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wcstring get_working_directory(void) {
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wcstring wd = L"./";
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wchar_t dir_path[4096];
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const wchar_t *cwd = wgetcwd( dir_path, 4096 );
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if (cwd) {
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wd = cwd;
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/* Make sure the working directory ends with a slash */
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if (! wd.empty() && wd.at(wd.size() - 1) != L'/')
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wd.push_back(L'/');
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}
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return wd;
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}
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