128 lines
2.3 KiB
C
128 lines
2.3 KiB
C
/* $Id$ */
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/* Copyright (c) 2007 Pierre Pronchery <khorben@defora.org> */
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/* This file is part of DeforaOS Unix utils */
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/* utils is not free software; you can redistribute it and/or modify it under
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* the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 3.0
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* Unported as published by the Creative Commons organization.
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*
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* utils is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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* A PARTICULAR PURPOSE. See the Creative Commons Attribution-NonCommercial-
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* ShareAlike 3.0 Unported license for more details.
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*
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* You should have received a copy of the Creative Commons Attribution-
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* NonCommercial-ShareAlike 3.0 along with utils; if not, browse to
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* http://creativecommons.org/licenses/by-nc-sa/3.0/ */
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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/* types */
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typedef enum _pwd_flag
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{
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PWD_P = 1,
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PWD_LP = 2
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} pwd_flag;
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/* pwd */
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static int _pwd_error(char const * message, int ret);
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static int _pwd(pwd_flag pf)
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{
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char * pwd;
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#ifdef MAXPATHLEN
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char buf[MAXPATHLEN];
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#else
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char buf[1024];
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#endif
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char * p;
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pwd = getenv("PWD");
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if(pf == PWD_LP && pwd != NULL && *pwd == '/')
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{
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for(p = pwd; *p != '\0'; p++)
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{
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if(*p != '/')
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continue;
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if(*++p != '.')
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continue;
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if(*++p == '\0' || *p == '/')
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{
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p--;
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break;
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}
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if(*p != '.')
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continue;
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if(*++p == '\0' || *p == '/')
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{
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p--;
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break;
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}
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}
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if(*p == '\0')
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{
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printf("%s\n", pwd);
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return 0;
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}
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}
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if(pwd != NULL)
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{
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/* FIXME check for symlinks */
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}
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else
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{
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if(getcwd(buf, sizeof(buf) - 1) == NULL)
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return _pwd_error("getcwd", 1);
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buf[sizeof(buf) - 1] = '\0';
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pwd = buf;
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}
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printf("%s\n", pwd);
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return 0;
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}
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static int _pwd_error(char const * message, int ret)
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{
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fputs("pwd: ", stderr);
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perror(message);
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return ret;
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}
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/* usage */
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static int _usage(void)
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{
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fputs("Usage: pwd [-L|-P]\n\
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-L avoid \".\" or \"..\" filenames\n\
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-P avoid symbolic links\n", stderr);
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return 1;
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}
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/* main */
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int main(int argc, char * argv[])
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{
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pwd_flag pf = PWD_LP;
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int o;
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while((o = getopt(argc, argv, "LP")) != -1)
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switch(o)
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{
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case 'L':
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pf = PWD_LP;
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break;
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case 'P':
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pf = PWD_P;
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break;
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default:
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return _usage();
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}
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if(optind != argc)
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return _usage();
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return _pwd(pf) == 0 ? 0 : 2;
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}
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