128 lines
3.2 KiB
C
128 lines
3.2 KiB
C
/* makepath.c - glue PATH and DIR together into a full pathname. */
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/* Copyright (C) 1987, 1989, 1991 Free Software Foundation, Inc.
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This file is part of GNU Bash, the Bourne Again SHell.
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Bash is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Bash is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Bash. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#if defined (HAVE_UNISTD_H)
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# ifdef _MINIX
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# include <sys/types.h>
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# endif
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# include <unistd.h>
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#endif
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#include <bashansi.h>
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#include "shell.h"
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#include <tilde/tilde.h>
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#ifndef NULL
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# define NULL 0
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#endif
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/* MAKE SURE THESE AGREE WITH ../../externs.h. */
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#ifndef MP_DOTILDE
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# define MP_DOTILDE 0x01
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# define MP_DOCWD 0x02
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# define MP_RMDOT 0x04
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# define MP_IGNDOT 0x08
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#endif
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extern char *get_working_directory __P((char *));
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static char *nullpath = "";
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/* Take PATH, an element from, e.g., $CDPATH, and DIR, a directory name,
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and paste them together into PATH/DIR. Tilde expansion is performed on
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PATH if (flags & MP_DOTILDE) is non-zero. If PATH is NULL or the empty
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string, it is converted to the current directory. A full pathname is
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used if (flags & MP_DOCWD) is non-zero, otherwise `./' is used. If
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(flags & MP_RMDOT) is non-zero, any `./' is removed from the beginning
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of DIR. If (flags & MP_IGNDOT) is non-zero, a PATH that is "." or "./"
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is ignored. */
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#define MAKEDOT() \
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do { \
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xpath = (char *)xmalloc (2); \
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xpath[0] = '.'; \
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xpath[1] = '\0'; \
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pathlen = 1; \
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} while (0)
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char *
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sh_makepath (path, dir, flags)
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const char *path, *dir;
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int flags;
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{
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int dirlen, pathlen;
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char *ret, *xpath, *xdir, *r, *s;
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if (path == 0 || *path == '\0')
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{
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if (flags & MP_DOCWD)
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{
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xpath = get_working_directory ("sh_makepath");
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if (xpath == 0)
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{
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ret = get_string_value ("PWD");
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if (ret)
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xpath = savestring (ret);
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}
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if (xpath == 0)
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MAKEDOT();
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else
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pathlen = strlen (xpath);
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}
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else
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MAKEDOT();
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}
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else if ((flags & MP_IGNDOT) && path[0] == '.' && (path[1] == '\0' ||
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(path[1] == '/' && path[2] == '\0')))
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{
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xpath = nullpath;
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pathlen = 0;
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}
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else
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{
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xpath = ((flags & MP_DOTILDE) && *path == '~') ? bash_tilde_expand (path, 0) : (char *)path;
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pathlen = strlen (xpath);
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}
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xdir = (char *)dir;
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dirlen = strlen (xdir);
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if ((flags & MP_RMDOT) && dir[0] == '.' && dir[1] == '/')
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{
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xdir += 2;
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dirlen -= 2;
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}
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r = ret = (char *)xmalloc (2 + dirlen + pathlen);
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s = xpath;
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while (*s)
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*r++ = *s++;
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if (s > xpath && s[-1] != '/')
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*r++ = '/';
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s = xdir;
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while (*r++ = *s++)
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;
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if (xpath != path && xpath != nullpath)
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free (xpath);
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return (ret);
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}
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