mirror of
https://github.com/fish-shell/fish-shell
synced 2024-12-27 05:13:10 +00:00
522 lines
8.6 KiB
C++
522 lines
8.6 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 "halloc.h"
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#include "halloc_util.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.c_str(), X_OK )==0 )
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{
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struct stat buff;
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if( wstat( new_cmd.c_str(), &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( void *context, const wchar_t *cmd )
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{
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wchar_t *path;
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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 halloc_wcsdup( context, 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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path = env_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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/*
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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 *)halloc( context, sizeof(wchar_t)*(wcslen(cmd)+wcslen(path)+2) );
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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 );
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wchar_t *nxt_path = path;
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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( 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( 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_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 = vars.get(L"CDPATH");
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if( !path || !wcslen(path) )
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{
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path = L".";
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}
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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.c_str(), &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.c_str(), &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_get_cdpath( void *context, const wchar_t *dir )
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{
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wchar_t *res = 0;
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int err = ENOENT;
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if( !dir )
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return 0;
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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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res = halloc_wcsdup( context, dir );
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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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wchar_t *path;
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wchar_t *path_cpy;
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wchar_t *nxt_path;
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wchar_t *state;
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wchar_t *whole_path;
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path = env_get(L"CDPATH");
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if( !path || !wcslen(path) )
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{
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path = L".";
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}
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nxt_path = path;
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path_cpy = wcsdup( path );
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if( !path_cpy )
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{
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DIE_MEM();
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}
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for( 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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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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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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res = whole_path;
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halloc_register( context, whole_path );
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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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free( whole_path );
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}
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free( path_cpy );
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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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wchar_t *path_get_config( void *context)
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{
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wchar_t *xdg_dir, *home;
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int done = 0;
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wchar_t *res = 0;
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xdg_dir = env_get( L"XDG_CONFIG_HOME" );
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if( xdg_dir )
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{
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res = wcsdupcat( 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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else
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{
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free( res );
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}
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}
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else
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{
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home = env_get( L"HOME" );
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if( home )
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{
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res = wcsdupcat( 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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else
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{
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free( res );
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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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halloc_register_function( context, &free, res );
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return res;
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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 0;
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}
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}
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wchar_t *path_make_canonical( void *context, const wchar_t *path )
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{
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wchar_t *res = halloc_wcsdup( context, path );
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wchar_t *in, *out;
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in = out = res;
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while( *in )
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{
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if( *in == L'/' )
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{
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while( *(in+1) == L'/' )
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{
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in++;
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}
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}
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*out = *in;
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out++;
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in++;
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}
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while( 1 )
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{
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if( out == res )
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break;
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if( *(out-1) != L'/' )
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break;
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out--;
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}
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*out = 0;
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return res;
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}
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