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#include "sh.h"
#include "ksh_stat.h"
#include "src/compat.h"
/*
* Contains a routine to search a : separated list of
* paths (a la CDPATH) and make appropiate file names.
* Also contains a routine to simplify .'s and ..'s out of
* a path name.
*
* Larry Bouzane (larry@cs.mun.ca)
*/
/*
* $Log: path.c,v $
* Revision 1.2 1994/05/19 18:32:40 michael
* Merge complete, stdio replaced, various fixes. (pre autoconf)
*
* Revision 1.1 1994/04/06 13:14:03 michael
* Initial revision
*
* Revision 4.2 1990/12/06 18:05:24 larry
* Updated test code to reflect parameter change.
* Fixed problem with /a/./.dir being simplified to /a and not /a/.dir due
* to *(cur+2) == *f test instead of the correct cur+2 == f
*
* Revision 4.1 90/10/29 14:42:19 larry
* base MUN version
*
* Revision 3.1.0.4 89/02/16 20:28:36 larry
* Forgot to set *pathlist to NULL when last changed make_path().
*
* Revision 3.1.0.3 89/02/13 20:29:55 larry
* Fixed up cd so that it knew when a node from CDPATH was used and would
* print a message only when really necessary.
*
* Revision 3.1.0.2 89/02/13 17:51:22 larry
* Merged with Eric Gisin's version.
*
* Revision 3.1.0.1 89/02/13 17:50:58 larry
* *** empty log message ***
*
* Revision 3.1 89/02/13 17:49:28 larry
* *** empty log message ***
*
*/
/*
* Makes a filename into result using the following algorithm.
* - make result NULL
* - if file starts with '/', append file to result & set cdpathp to NULL
* - if file starts with ./ or ../ append cwd and file to result
* and set cdpathp to NULL
* - if the first element of cdpathp doesnt start with a '/' xx or '.' xx
* then cwd is appended to result.
* - the first element of cdpathp is appended to result
* - file is appended to result
* - cdpathp is set to the start of the next element in cdpathp (or NULL
* if there are no more elements.
* The return value indicates whether a non-null element from cdpathp
* was appened to result.
*/
int
make_path(cwd, file, cdpathp, xsp, phys_pathp)
const char *cwd;
const char *file;
char **cdpathp; /* & of : separated list */
XString *xsp;
int *phys_pathp;
{
int rval = 0;
int use_cdpath = 1;
char *plist;
int len;
int plen = 0;
char *xp = Xstring(*xsp, xp);
if (!file)
file = null;
if (!ISRELPATH(file)) {
*phys_pathp = 0;
use_cdpath = 0;
} else {
if (file[0] == '.') {
char c = file[1];
if (c == '.')
c = file[2];
if (ISDIRSEP(c) || c == '\0')
use_cdpath = 0;
}
plist = *cdpathp;
if (!plist)
use_cdpath = 0;
else if (use_cdpath) {
char *pend;
for (pend = plist; *pend && *pend != PATHSEP; pend++)
;
plen = pend - plist;
*cdpathp = *pend ? ++pend : (char *) 0;
}
if ((use_cdpath == 0 || !plen || ISRELPATH(plist))
&& (cwd && *cwd))
{
len = strlen(cwd);
XcheckN(*xsp, xp, len);
memcpy(xp, cwd, len);
xp += len;
if (!ISDIRSEP(cwd[len - 1]))
Xput(*xsp, xp, DIRSEP);
}
*phys_pathp = Xlength(*xsp, xp);
if (use_cdpath && plen) {
XcheckN(*xsp, xp, plen);
memcpy(xp, plist, plen);
xp += plen;
if (!ISDIRSEP(plist[plen - 1]))
Xput(*xsp, xp, DIRSEP);
rval = 1;
}
}
len = strlen(file) + 1;
XcheckN(*xsp, xp, len);
memcpy(xp, file, len);
if (!use_cdpath)
*cdpathp = (char *) 0;
return rval;
}
void
set_current_wd(char *path)
{
int len;
char *p = path;
if (!p && !(p = get_current_dir_name()))
p = NULL;
len = strlen(p) + 1;
if (len > current_wd_size)
current_wd = aresize(current_wd, current_wd_size = len, APERM);
memcpy(current_wd, p, len);
if (p != path && p != NULL)
free(p);
}
#ifdef TEST
main(argc, argv)
{
int rv;
char *cp, cdpath[256], pwd[256], file[256], result[256];
printf("enter CDPATH: "); gets(cdpath);
printf("enter PWD: "); gets(pwd);
while (1) {
if (printf("Enter file: "), gets(file) == 0)
return 0;
cp = cdpath;
do {
rv = make_path(pwd, file, &cp, result, sizeof(result));
printf("make_path returns (%d), \"%s\" ", rv, result);
simplify_path(result);
printf("(simpifies to \"%s\")\n", result);
} while (cp);
}
}
#endif /* TEST */
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