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/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1982-2012 AT&T Intellectual Property *
* and is licensed under the *
* Eclipse Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.eclipse.org/org/documents/epl-v10.html *
* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* David Korn <dgk@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
/*
* cd [-LP] [dirname]
* cd [-LP] [old] [new]
* pwd [-LP]
*
* David Korn
* AT&T Labs
* research!dgk
*
*/
#include "defs.h"
#include <stak.h>
#include <error.h>
#include "variables.h"
#include "path.h"
#include "name.h"
#include "builtins.h"
#include <ls.h>
/*
* Invalidate path name bindings to relative paths
*/
static void rehash(register Namval_t *np,void *data)
{
Pathcomp_t *pp = (Pathcomp_t*)np->nvalue.cp;
NOT_USED(data);
if(pp && *pp->name!='/')
_nv_unset(np,0);
}
int b_cd(int argc, char *argv[],Shbltin_t *context)
{
register char *dir;
Pathcomp_t *cdpath = 0;
register const char *dp;
register Shell_t *shp = context->shp;
int saverrno=0;
int rval,flag=0;
char *oldpwd;
Namval_t *opwdnod, *pwdnod;
if(sh_isoption(SH_RESTRICTED))
errormsg(SH_DICT,ERROR_exit(1),e_restricted+4);
while((rval = optget(argv,sh_optcd))) switch(rval)
{
case 'L':
flag = 0;
break;
case 'P':
flag = 1;
break;
case ':':
errormsg(SH_DICT,2, "%s", opt_info.arg);
break;
case '?':
errormsg(SH_DICT,ERROR_usage(2), "%s", opt_info.arg);
break;
}
argv += opt_info.index;
argc -= opt_info.index;
dir = argv[0];
if(error_info.errors>0 || argc >2)
errormsg(SH_DICT,ERROR_usage(2),"%s",optusage((char*)0));
oldpwd = (char*)shp->pwd;
opwdnod = (shp->subshell?sh_assignok(OLDPWDNOD,1):OLDPWDNOD);
pwdnod = (shp->subshell?sh_assignok(PWDNOD,1):PWDNOD);
if(argc==2)
dir = sh_substitute(oldpwd,dir,argv[1]);
else if(!dir)
dir = nv_getval(HOME);
else if(*dir == '-' && dir[1]==0)
dir = nv_getval(opwdnod);
if(!dir || *dir==0)
errormsg(SH_DICT,ERROR_exit(1),argc==2?e_subst+4:e_direct);
#if _WINIX
if(*dir != '/' && (dir[1]!=':'))
#else
if(*dir != '/')
#endif /* _WINIX */
{
if(!(cdpath = (Pathcomp_t*)shp->cdpathlist) && (dp=sh_scoped(shp,CDPNOD)->nvalue.cp))
{
if(cdpath=path_addpath(shp,(Pathcomp_t*)0,dp,PATH_CDPATH))
{
shp->cdpathlist = (void*)cdpath;
cdpath->shp = shp;
}
}
if(!oldpwd)
oldpwd = path_pwd(shp,1);
}
if(*dir=='.')
{
/* test for pathname . ./ .. or ../ */
if(*(dp=dir+1) == '.')
dp++;
if(*dp==0 || *dp=='/')
cdpath = 0;
}
rval = -1;
do
{
dp = cdpath?cdpath->name:"";
cdpath = path_nextcomp(shp,cdpath,dir,0);
#if _WINIX
if(*stakptr(PATH_OFFSET+1)==':' && isalpha(*stakptr(PATH_OFFSET)))
{
*stakptr(PATH_OFFSET+1) = *stakptr(PATH_OFFSET);
*stakptr(PATH_OFFSET)='/';
}
#endif /* _WINIX */
if(*stakptr(PATH_OFFSET)!='/')
{
char *last=(char*)stakfreeze(1);
stakseek(PATH_OFFSET);
stakputs(oldpwd);
/* don't add '/' of oldpwd is / itself */
if(*oldpwd!='/' || oldpwd[1])
stakputc('/');
stakputs(last+PATH_OFFSET);
stakputc(0);
}
if(!flag)
{
register char *cp;
stakseek(PATH_MAX+PATH_OFFSET);
#if SHOPT_FS_3D
if(!(cp = pathcanon(stakptr(PATH_OFFSET),PATH_DOTDOT)))
continue;
/* eliminate trailing '/' */
while(*--cp == '/' && cp>stakptr(PATH_OFFSET))
*cp = 0;
#else
if(*(cp=stakptr(PATH_OFFSET))=='/')
if(!pathcanon(cp,PATH_DOTDOT))
continue;
#endif /* SHOPT_FS_3D */
}
if((rval=chdir(path_relative(shp,stakptr(PATH_OFFSET)))) >= 0)
goto success;
if(errno!=ENOENT && saverrno==0)
saverrno=errno;
}
while(cdpath);
if(rval<0 && *dir=='/' && *(path_relative(shp,stakptr(PATH_OFFSET)))!='/')
rval = chdir(dir);
/* use absolute chdir() if relative chdir() fails */
if(rval<0)
{
if(saverrno)
errno = saverrno;
errormsg(SH_DICT,ERROR_system(1),"%s:",dir);
}
success:
if(dir == nv_getval(opwdnod) || argc==2)
dp = dir; /* print out directory for cd - */
if(flag)
{
dir = stakptr(PATH_OFFSET);
if (!(dir=pathcanon(dir,PATH_PHYSICAL)))
{
dir = stakptr(PATH_OFFSET);
errormsg(SH_DICT,ERROR_system(1),"%s:",dir);
}
stakseek(dir-stakptr(0));
}
dir = (char*)stakfreeze(1)+PATH_OFFSET;
if(*dp && (*dp!='.'||dp[1]) && strchr(dir,'/'))
sfputr(sfstdout,dir,'\n');
if(*dir != '/')
return(0);
nv_putval(opwdnod,oldpwd,NV_RDONLY);
if(oldpwd)
free(oldpwd);
flag = strlen(dir);
/* delete trailing '/' */
while(--flag>0 && dir[flag]=='/')
dir[flag] = 0;
nv_putval(pwdnod,dir,NV_RDONLY);
nv_onattr(pwdnod,NV_NOFREE|NV_EXPORT);
shp->pwd = pwdnod->nvalue.cp;
nv_scan(shp->track_tree,rehash,(void*)0,NV_TAGGED,NV_TAGGED);
path_newdir(shp,shp->pathlist);
path_newdir(shp,shp->cdpathlist);
return(0);
}
int b_pwd(int argc, char *argv[],Shbltin_t *context)
{
register int n, flag = 0;
register char *cp;
register Shell_t *shp = context->shp;
NOT_USED(argc);
while((n = optget(argv,sh_optpwd))) switch(n)
{
case 'L':
flag = 0;
break;
case 'P':
flag = 1;
break;
case ':':
errormsg(SH_DICT,2, "%s", opt_info.arg);
break;
case '?':
errormsg(SH_DICT,ERROR_usage(2), "%s", opt_info.arg);
break;
}
if(error_info.errors)
errormsg(SH_DICT,ERROR_usage(2),"%s",optusage((char*)0));
if(*(cp = path_pwd(shp,0)) != '/')
errormsg(SH_DICT,ERROR_system(1), e_pwd);
if(flag)
{
#if SHOPT_FS_3D
if(shp->gd->lim.fs3d && (flag = mount(e_dot,NIL(char*),FS3D_GET|FS3D_VIEW,0))>=0)
{
cp = (char*)stakseek(++flag+PATH_MAX);
mount(e_dot,cp,FS3D_GET|FS3D_VIEW|FS3D_SIZE(flag),0);
}
else
#endif /* SHOPT_FS_3D */
cp = strcpy(stakseek(strlen(cp)+PATH_MAX),cp);
pathcanon(cp,PATH_PHYSICAL);
}
sfputr(sfstdout,cp,'\n');
return(0);
}
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