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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/rdist/expand.c	Lines:	0	294	0.0 %
Date:	2017-11-13	Branches:	0	234	0.0 %


/*	$OpenBSD: expand.c,v 1.15 2015/01/20 09:00:16 guenther Exp $	*/

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "client.h"

#define	MAXEARGS	2048
#define LC 		'{'
#define RC 		'}'

static char	shchars[] = "${[*?";

int		which;		/* bit mask of types to expand */
int		eargc;		/* expanded arg count */
char	      **eargv;		/* expanded arg vectors */
char	       *path;
char	       *pathp;
char	       *lastpathp;
char	       *tilde;		/* "~user" if not expanding tilde, else "" */
char	       *tpathp;

int		expany;		/* any expansions done? */
char	       *entp;
char	      **sortbase;
char 	       *argvbuf[MAXEARGS];

#define sort()	qsort((char *)sortbase, &eargv[eargc] - sortbase, \
		      sizeof(*sortbase), argcmp), sortbase = &eargv[eargc]

static void Cat(u_char *, u_char *);
static void addpath(int);
static int argcmp(const void *, const void *);

static void
Cat(u_char *s1, u_char *s2)		/* quote in s1 and s2 */
{
	char *cp;
	int len = strlen((char *)s1) + strlen((char *)s2) + 2;

	if ((eargc + 1) >= MAXEARGS) {
		yyerror("Too many names");
		return;
	}

	eargv[++eargc] = NULL;
	eargv[eargc - 1] = cp = xmalloc(len);

	do {
		if (*s1 == QUOTECHAR)
			s1++;
	} while ((*cp++ = *s1++) != '\0');
	cp--;
	do {
		if (*s2 == QUOTECHAR)
			s2++;
	} while ((*cp++ = *s2++) != '\0');
}

static void
addpath(int c)
{
	if (pathp >= lastpathp) {
		yyerror("Pathname too long");
		return;
	} else {
		*pathp++ = c;
		*pathp = CNULL;
	}
}

/*
 * Take a list of names and expand any macros, etc.
 * wh = E_VARS if expanding variables.
 * wh = E_SHELL if expanding shell characters.
 * wh = E_TILDE if expanding `~'.
 * or any of these or'ed together.
 *
 * Major portions of this were snarfed from csh/sh.glob.c.
 */
struct namelist *
expand(struct namelist *list, int wh)		/* quote in list->n_name */
{
	struct namelist *nl, *prev;
	int n;
	char pathbuf[BUFSIZ];

	if (debug)
		debugmsg(DM_CALL, "expand(%p, %d) start, list = %s",
			 list, wh, getnlstr(list));

	if (wh == 0)
		fatalerr("expand() contains invalid 'wh' argument.");

	which = wh;
	path = tpathp = pathp = pathbuf;
	*pathp = CNULL;
	lastpathp = &pathbuf[sizeof pathbuf - 2];
	tilde = "";
	eargc = 0;
	eargv = sortbase = argvbuf;
	*eargv = NULL;

	/*
	 * Walk the name list and expand names into eargv[];
	 */
	for (nl = list; nl != NULL; nl = nl->n_next)
		expstr((u_char *)nl->n_name);
	/*
	 * Take expanded list of names from eargv[] and build a new list.
	 */
	list = prev = NULL;
	for (n = 0; n < eargc; n++) {
		nl = makenl(NULL);
		nl->n_name = eargv[n];
		if (prev == NULL)
			list = prev = nl;
		else {
			prev->n_next = nl;
			prev = nl;
		}
	}

	return(list);
}

/*
 * xstrchr() is a version of strchr() that
 * handles u_char buffers.
 */
u_char *
xstrchr(u_char *str, int ch)
{
	u_char *cp;

	for (cp = str; cp && *cp != CNULL; ++cp)
		if (ch == *cp)
			return(cp);

	return(NULL);
}

void
expstr(u_char *s)
{
	u_char *cp, *cp1;
	struct namelist *tp;
	u_char *tail;
	u_char ebuf[BUFSIZ];
	u_char varbuff[BUFSIZ];
	int savec, oeargc;

	if (s == NULL || *s == CNULL)
		return;

	/*
	 * Remove quoted characters
	 */
	if (IS_ON(which, E_VARS)) {
		if (strlen((char *)s) > sizeof(varbuff)) {
			yyerror("Variable is too large.");
			return;
		}
		for (cp = s, cp1 = varbuff; cp && *cp; ++cp) {
			/*
			 * remove quoted character if the next
			 * character is not $
			 */
			if (*cp == QUOTECHAR && *(cp+1) != '$')
				++cp;
			else
				*cp1++ = *cp;
		}
		*cp1 = CNULL;
		s = varbuff;
	}

	/*
	 * Consider string 's' a variable that should be expanded if
	 * there is a '$' in 's' that is not quoted.
	 */
	if (IS_ON(which, E_VARS) &&
	    ((cp = xstrchr(s, '$')) && !(cp > s && *(cp-1) == QUOTECHAR))) {
		*cp++ = CNULL;
		if (*cp == CNULL) {
			yyerror("no variable name after '$'");
			return;
		}
		if (*cp == LC) {
			cp++;
			for (cp1 = cp; ; cp1 = tail + 1) {
				if ((tail = xstrchr(cp1, RC)) == NULL) {
					yyerror("unmatched '{'");
					return;
				}
				if (tail[-1] != QUOTECHAR) break;
			}
			*tail++ = savec = CNULL;
			if (*cp == CNULL) {
				yyerror("no variable name after '$'");
				return;
			}
		} else {
			tail = cp + 1;
			savec = *tail;
			*tail = CNULL;
		}
		tp = lookup((char *)cp, LOOKUP, NULL);
		if (savec != CNULL)
			*tail = savec;
		if (tp != NULL) {
			for (; tp != NULL; tp = tp->n_next) {
				(void) snprintf((char *)ebuf, sizeof(ebuf),
					        "%s%s%s", s, tp->n_name, tail);
				expstr(ebuf);
			}
			return;
		}
		(void) snprintf((char *)ebuf, sizeof(ebuf), "%s%s", s, tail);
		expstr(ebuf);
		return;
	}
	if ((which & ~E_VARS) == 0 || !strcmp((char *)s, "{") ||
	    !strcmp((char *)s, "{}")) {
		Cat(s, (u_char *)"");
		sort();
		return;
	}
	if (*s == '~') {
		cp = ++s;
		if (*cp == CNULL || *cp == '/') {
			tilde = "~";
			cp1 = (u_char *)homedir;
		} else {
			tilde = (char *)(cp1 = ebuf);
			*cp1++ = '~';
			do
				*cp1++ = *cp++;
			while (*cp && *cp != '/');
			*cp1 = CNULL;
			if (pw == NULL || strcmp(pw->pw_name,
						 (char *)ebuf+1) != 0) {
				if ((pw = getpwnam((char *)ebuf+1)) == NULL) {
					strlcat((char *)ebuf,
					        ": unknown user name",
					        sizeof(ebuf));
					yyerror((char *)ebuf+1);
					return;
				}
			}
			cp1 = (u_char *)pw->pw_dir;
			s = cp;
		}
		for (cp = (u_char *)path; (*cp++ = *cp1++) != '\0'; )
			continue;
		tpathp = pathp = (char *)cp - 1;
	} else {
		tpathp = pathp = path;
		tilde = "";
	}
	*pathp = CNULL;
	if (!(which & E_SHELL)) {
		if (which & E_TILDE)
			Cat((u_char *)path, s);
		else
			Cat((u_char *)tilde, s);
		sort();
		return;
	}
	oeargc = eargc;
	expany = 0;
	expsh(s);
	if (eargc == oeargc)
		Cat(s, (u_char *)"");		/* "nonomatch" is set */
	sort();
}

static int
argcmp(const void *v1, const void *v2)
{
	const char *const *a1 = v1, *const *a2 = v2;

	return (strcmp(*a1, *a2));
}

/*
 * If there are any Shell meta characters in the name,
 * expand into a list, after searching directory
 */
void
expsh(u_char *s)			/* quote in s */
{
	u_char *cp, *oldcp;
	char *spathp;
	struct stat stb;

	spathp = pathp;
	cp = s;
	while (!any(*cp, shchars)) {
		if (*cp == CNULL) {
			if (!expany || stat(path, &stb) >= 0) {
				if (which & E_TILDE)
					Cat((u_char *)path, (u_char *)"");
				else
					Cat((u_char *)tilde, (u_char *)tpathp);
			}
			goto endit;
		}
		if (*cp == QUOTECHAR) cp++;
		addpath(*cp++);
	}
	oldcp = cp;
	while (cp > s && *cp != '/')
		cp--, pathp--;
	if (*cp == '/')
		cp++, pathp++;
	*pathp = CNULL;
	if (*oldcp == '{') {
		(void) execbrc(cp, NULL);
		return;
	}
	matchdir((char *)cp);
endit:
	pathp = spathp;
	*pathp = CNULL;
}

void
matchdir(char *pattern)			/* quote in pattern */
{
	struct stat stb;
	struct dirent *dp;
	DIR *dirp;

	dirp = opendir(path);
	if (dirp == NULL) {
		if (expany)
			return;
		goto patherr2;
	}
	if (fstat(dirfd(dirp), &stb) < 0)
		goto patherr1;
	if (!S_ISDIR(stb.st_mode)) {
		errno = ENOTDIR;
		goto patherr1;
	}
	while ((dp = readdir(dirp)) != NULL)
		if (match(dp->d_name, pattern)) {
			if (which & E_TILDE)
				Cat((u_char *)path, (u_char *)dp->d_name);
			else {
				(void) strlcpy(pathp, dp->d_name,
				    lastpathp - pathp + 2);
				Cat((u_char *)tilde, (u_char *)tpathp);
				*pathp = CNULL;
			}
		}
	closedir(dirp);
	return;

patherr1:
	closedir(dirp);
patherr2:
	(void) strlcat(path, ": ", lastpathp - path + 2);
	(void) strlcat(path, SYSERR, lastpathp - path + 2);
	yyerror(path);
}

int
execbrc(u_char *p, u_char *s)		/* quote in p */
{
	u_char restbuf[BUFSIZ + 2];
	u_char *pe, *pm, *pl;
	int brclev = 0;
	u_char *lm, savec;
	char *spathp;

	for (lm = restbuf; *p != '{'; *lm++ = *p++)
		if (*p == QUOTECHAR) *lm++ = *p++;

	for (pe = ++p; *pe; pe++)
		switch (*pe) {

		case '{':
			brclev++;
			continue;

		case '}':
			if (brclev == 0)
				goto pend;
			brclev--;
			continue;

		case '[':
			for (pe++; *pe && *pe != ']'; pe++)
				if (*p == QUOTECHAR) pe++;
			if (!*pe)
				yyerror("Missing ']'");
			continue;

		case QUOTECHAR:		/* skip this character */
			pe++;
			continue;
		}
pend:
	if (brclev || !*pe) {
		yyerror("Missing '}'");
		return (0);
	}
	for (pl = pm = p; pm <= pe; pm++)
		/* the strip code was a noop */
		switch (*pm) {

		case '{':
			brclev++;
			continue;

		case '}':
			if (brclev) {
				brclev--;
				continue;
			}
			goto doit;

		case ',':
			if (brclev)
				continue;
doit:
			savec = *pm;
			*pm = 0;
			*lm = 0;
			(void) strlcat((char *)restbuf, (char *)pl,
			    sizeof(restbuf));
			(void) strlcat((char *)restbuf, (char *)pe + 1,
			    sizeof(restbuf));
			*pm = savec;
			if (s == 0) {
				spathp = pathp;
				expsh(restbuf);
				pathp = spathp;
				*pathp = 0;
			} else if (amatch((char *)s, restbuf))
				return (1);
			sort();
			pl = pm + 1;
			continue;

		case '[':
			for (pm++; *pm && *pm != ']'; pm++)
				if (*pm == QUOTECHAR) pm++;
			if (!*pm)
				yyerror("Missing ']'");
			continue;

		case QUOTECHAR:			/* skip one character */
			pm++;
			continue;
		}
	return (0);
}

int
match(char *s, char *p)				/* quote in p */
{
	int c;
	char *sentp;
	char sexpany = expany;

	if (*s == '.' && *p != '.')
		return (0);
	sentp = entp;
	entp = s;
	c = amatch(s, p);
	entp = sentp;
	expany = sexpany;
	return (c);
}

int
amatch(char *s, u_char *p)			/* quote in p */
{
	int scc;
	int ok, lc;
	char *spathp;
	struct stat stb;
	int c, cc;

	expany = 1;
	for (;;) {
		scc = *s++;
		switch (c = *p++) {

		case '{':
			return (execbrc((u_char *)p - 1, (u_char *)s - 1));

		case '[':
			ok = 0;
			lc = 077777;
			while ((cc = *p++) != '\0') {
				if (cc == ']') {
					if (ok)
						break;
					return (0);
				}
				if (cc == QUOTECHAR) cc = *p++;
				if (cc == '-') {
					if (lc <= scc && scc <= (int)*p++)
						ok++;
				} else
					if (scc == (lc = cc))
						ok++;
			}
			if (cc == 0) {
				yyerror("Missing ']'");
				return (0);
			}
			continue;

		case '*':
			if (!*p)
				return (1);
			if (*p == '/') {
				p++;
				goto slash;
			}
			for (s--; *s; s++)
				if (amatch(s, p))
					return (1);
			return (0);

		case CNULL:
			return (scc == CNULL);

		default:
			if (c != scc)
				return (0);
			continue;

		case '?':
			if (scc == CNULL)
				return (0);
			continue;

		case '/':
			if (scc)
				return (0);
slash:
			s = entp;
			spathp = pathp;
			while (*s)
				addpath(*s++);
			addpath('/');
			if (stat(path, &stb) == 0 && S_ISDIR(stb.st_mode)) {
				if (*p == CNULL) {
					if (which & E_TILDE) {
						Cat((u_char *)path,
						    (u_char *)"");
					} else {
						Cat((u_char *)tilde,
						    (u_char *)tpathp);
					}
				} else
					expsh(p);
			}
			pathp = spathp;
			*pathp = CNULL;
			return (0);
		}
	}
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: expand.c,v 1.15 2015/01/20 09:00:16 guenther Exp $ */
2
3			/*
4			* Copyright (c) 1983 Regents of the University of California.
5			* All rights reserved.
6			*
7			* Redistribution and use in source and binary forms, with or without
8			* modification, are permitted provided that the following conditions
9			* are met:
10			* 1. Redistributions of source code must retain the above copyright
11			* notice, this list of conditions and the following disclaimer.
12			* 2. Redistributions in binary form must reproduce the above copyright
13			* notice, this list of conditions and the following disclaimer in the
14			* documentation and/or other materials provided with the distribution.
15			* 3. Neither the name of the University nor the names of its contributors
16			* may be used to endorse or promote products derived from this software
17			* without specific prior written permission.
18			*
19			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29			* SUCH DAMAGE.
30			*/
31
32			#include <dirent.h>
33			#include <errno.h>
34			#include <fcntl.h>
35			#include <stdlib.h>
36			#include <string.h>
37			#include <unistd.h>
38
39			#include "client.h"
40
41			#define MAXEARGS 2048
42			#define LC '{'
43			#define RC '}'
44
45			static char shchars[] = "${[*?";
46
47			int which; /* bit mask of types to expand */
48			int eargc; /* expanded arg count */
49			char *eargv; / expanded arg vectors */
50			char *path;
51			char *pathp;
52			char *lastpathp;
53			char tilde; / "~user" if not expanding tilde, else "" */
54			char *tpathp;
55
56			int expany; /* any expansions done? */
57			char *entp;
58			char **sortbase;
59			char *argvbuf[MAXEARGS];
60
61			#define sort() qsort((char *)sortbase, &eargv[eargc] - sortbase, \
62			sizeof(*sortbase), argcmp), sortbase = &eargv[eargc]
63
64			static void Cat(u_char , u_char );
65			static void addpath(int);
66			static int argcmp(const void , const void );
67
68			static void
69			Cat(u_char s1, u_char s2) /* quote in s1 and s2 */
70			{
71			char *cp;
72			int len = strlen((char )s1) + strlen((char )s2) + 2;
73
74			if ((eargc + 1) >= MAXEARGS) {
75			yyerror("Too many names");
76			return;
77			}
78
79			eargv[++eargc] = NULL;
80			eargv[eargc - 1] = cp = xmalloc(len);
81
82			do {
83			if (*s1 == QUOTECHAR)
84			s1++;
85			} while ((cp++ = s1++) != '\0');
86			cp--;
87			do {
88			if (*s2 == QUOTECHAR)
89			s2++;
90			} while ((cp++ = s2++) != '\0');
91			}
92
93			static void
94			addpath(int c)
95			{
96			if (pathp >= lastpathp) {
97			yyerror("Pathname too long");
98			return;
99			} else {
100			*pathp++ = c;
101			*pathp = CNULL;
102			}
103			}
104
105			/*
106			* Take a list of names and expand any macros, etc.
107			* wh = E_VARS if expanding variables.
108			* wh = E_SHELL if expanding shell characters.
109			* wh = E_TILDE if expanding `~'.
110			* or any of these or'ed together.
111			*
112			* Major portions of this were snarfed from csh/sh.glob.c.
113			*/
114			struct namelist *
115			expand(struct namelist list, int wh) / quote in list->n_name */
116			{
117			struct namelist nl, prev;
118			int n;
119			char pathbuf[BUFSIZ];
120
121			if (debug)
122			debugmsg(DM_CALL, "expand(%p, %d) start, list = %s",
123			list, wh, getnlstr(list));
124
125			if (wh == 0)
126			fatalerr("expand() contains invalid 'wh' argument.");
127
128			which = wh;
129			path = tpathp = pathp = pathbuf;
130			*pathp = CNULL;
131			lastpathp = &pathbuf[sizeof pathbuf - 2];
132			tilde = "";
133			eargc = 0;
134			eargv = sortbase = argvbuf;
135			*eargv = NULL;
136
137			/*
138			* Walk the name list and expand names into eargv[];
139			*/
140			for (nl = list; nl != NULL; nl = nl->n_next)
141			expstr((u_char *)nl->n_name);
142			/*
143			* Take expanded list of names from eargv[] and build a new list.
144			*/
145			list = prev = NULL;
146			for (n = 0; n < eargc; n++) {
147			nl = makenl(NULL);
148			nl->n_name = eargv[n];
149			if (prev == NULL)
150			list = prev = nl;
151			else {
152			prev->n_next = nl;
153			prev = nl;
154			}
155			}
156
157			return(list);
158			}
159
160			/*
161			* xstrchr() is a version of strchr() that
162			* handles u_char buffers.
163			*/
164			u_char *
165			xstrchr(u_char *str, int ch)
166			{
167			u_char *cp;
168
169			for (cp = str; cp && *cp != CNULL; ++cp)
170			if (ch == *cp)
171			return(cp);
172
173			return(NULL);
174			}
175
176			void
177			expstr(u_char *s)
178			{
179			u_char cp, cp1;
180			struct namelist *tp;
181			u_char *tail;
182			u_char ebuf[BUFSIZ];
183			u_char varbuff[BUFSIZ];
184			int savec, oeargc;
185
186			if (s == NULL \|\| *s == CNULL)
187			return;
188
189			/*
190			* Remove quoted characters
191			*/
192			if (IS_ON(which, E_VARS)) {
193			if (strlen((char *)s) > sizeof(varbuff)) {
194			yyerror("Variable is too large.");
195			return;
196			}
197			for (cp = s, cp1 = varbuff; cp && *cp; ++cp) {
198			/*
199			* remove quoted character if the next
200			* character is not $
201			*/
202			if (cp == QUOTECHAR && (cp+1) != '$')
203			++cp;
204			else
205			cp1++ = cp;
206			}
207			*cp1 = CNULL;
208			s = varbuff;
209			}
210
211			/*
212			* Consider string 's' a variable that should be expanded if
213			* there is a '$' in 's' that is not quoted.
214			*/
215			if (IS_ON(which, E_VARS) &&
216			((cp = xstrchr(s, '$')) && !(cp > s && *(cp-1) == QUOTECHAR))) {
217			*cp++ = CNULL;
218			if (*cp == CNULL) {
219			yyerror("no variable name after '$'");
220			return;
221			}
222			if (*cp == LC) {
223			cp++;
224			for (cp1 = cp; ; cp1 = tail + 1) {
225			if ((tail = xstrchr(cp1, RC)) == NULL) {
226			yyerror("unmatched '{'");
227			return;
228			}
229			if (tail[-1] != QUOTECHAR) break;
230			}
231			*tail++ = savec = CNULL;
232			if (*cp == CNULL) {
233			yyerror("no variable name after '$'");
234			return;
235			}
236			} else {
237			tail = cp + 1;
238			savec = *tail;
239			*tail = CNULL;
240			}
241			tp = lookup((char *)cp, LOOKUP, NULL);
242			if (savec != CNULL)
243			*tail = savec;
244			if (tp != NULL) {
245			for (; tp != NULL; tp = tp->n_next) {
246			(void) snprintf((char *)ebuf, sizeof(ebuf),
247			"%s%s%s", s, tp->n_name, tail);
248			expstr(ebuf);
249			}
250			return;
251			}
252			(void) snprintf((char *)ebuf, sizeof(ebuf), "%s%s", s, tail);
253			expstr(ebuf);
254			return;
255			}
256			if ((which & ~E_VARS) == 0 \|\| !strcmp((char *)s, "{") \|\|
257			!strcmp((char *)s, "{}")) {
258			Cat(s, (u_char *)"");
259			sort();
260			return;
261			}
262			if (*s == '~') {
263			cp = ++s;
264			if (cp == CNULL \|\| cp == '/') {
265			tilde = "~";
266			cp1 = (u_char *)homedir;
267			} else {
268			tilde = (char *)(cp1 = ebuf);
269			*cp1++ = '~';
270			do
271			cp1++ = cp++;
272			while (cp && cp != '/');
273			*cp1 = CNULL;
274			if (pw == NULL \|\| strcmp(pw->pw_name,
275			(char *)ebuf+1) != 0) {
276			if ((pw = getpwnam((char *)ebuf+1)) == NULL) {
277			strlcat((char *)ebuf,
278			": unknown user name",
279			sizeof(ebuf));
280			yyerror((char *)ebuf+1);
281			return;
282			}
283			}
284			cp1 = (u_char *)pw->pw_dir;
285			s = cp;
286			}
287			for (cp = (u_char )path; (cp++ = *cp1++) != '\0'; )
288			continue;
289			tpathp = pathp = (char *)cp - 1;
290			} else {
291			tpathp = pathp = path;
292			tilde = "";
293			}
294			*pathp = CNULL;
295			if (!(which & E_SHELL)) {
296			if (which & E_TILDE)
297			Cat((u_char *)path, s);
298			else
299			Cat((u_char *)tilde, s);
300			sort();
301			return;
302			}
303			oeargc = eargc;
304			expany = 0;
305			expsh(s);
306			if (eargc == oeargc)
307			Cat(s, (u_char )""); / "nonomatch" is set */
308			sort();
309			}
310
311			static int
312			argcmp(const void v1, const void v2)
313			{
314			const char const a1 = v1, const a2 = v2;
315
316			return (strcmp(a1, a2));
317			}
318
319			/*
320			* If there are any Shell meta characters in the name,
321			* expand into a list, after searching directory
322			*/
323			void
324			expsh(u_char s) / quote in s */
325			{
326			u_char cp, oldcp;
327			char *spathp;
328			struct stat stb;
329
330			spathp = pathp;
331			cp = s;
332			while (!any(*cp, shchars)) {
333			if (*cp == CNULL) {
334			if (!expany \|\| stat(path, &stb) >= 0) {
335			if (which & E_TILDE)
336			Cat((u_char )path, (u_char )"");
337			else
338			Cat((u_char )tilde, (u_char )tpathp);
339			}
340			goto endit;
341			}
342			if (*cp == QUOTECHAR) cp++;
343			addpath(*cp++);
344			}
345			oldcp = cp;
346			while (cp > s && *cp != '/')
347			cp--, pathp--;
348			if (*cp == '/')
349			cp++, pathp++;
350			*pathp = CNULL;
351			if (*oldcp == '{') {
352			(void) execbrc(cp, NULL);
353			return;
354			}
355			matchdir((char *)cp);
356			endit:
357			pathp = spathp;
358			*pathp = CNULL;
359			}
360
361			void
362			matchdir(char pattern) / quote in pattern */
363			{
364			struct stat stb;
365			struct dirent *dp;
366			DIR *dirp;
367
368			dirp = opendir(path);
369			if (dirp == NULL) {
370			if (expany)
371			return;
372			goto patherr2;
373			}
374			if (fstat(dirfd(dirp), &stb) < 0)
375			goto patherr1;
376			if (!S_ISDIR(stb.st_mode)) {
377			errno = ENOTDIR;
378			goto patherr1;
379			}
380			while ((dp = readdir(dirp)) != NULL)
381			if (match(dp->d_name, pattern)) {
382			if (which & E_TILDE)
383			Cat((u_char )path, (u_char )dp->d_name);
384			else {
385			(void) strlcpy(pathp, dp->d_name,
386			lastpathp - pathp + 2);
387			Cat((u_char )tilde, (u_char )tpathp);
388			*pathp = CNULL;
389			}
390			}
391			closedir(dirp);
392			return;
393
394			patherr1:
395			closedir(dirp);
396			patherr2:
397			(void) strlcat(path, ": ", lastpathp - path + 2);
398			(void) strlcat(path, SYSERR, lastpathp - path + 2);
399			yyerror(path);
400			}
401
402			int
403			execbrc(u_char p, u_char s) /* quote in p */
404			{
405			u_char restbuf[BUFSIZ + 2];
406			u_char pe, pm, *pl;
407			int brclev = 0;
408			u_char *lm, savec;
409			char *spathp;
410
411			for (lm = restbuf; p != '{'; lm++ = *p++)
412			if (p == QUOTECHAR) lm++ = *p++;
413
414			for (pe = ++p; *pe; pe++)
415			switch (*pe) {
416
417			case '{':
418			brclev++;
419			continue;
420
421			case '}':
422			if (brclev == 0)
423			goto pend;
424			brclev--;
425			continue;
426
427			case '[':
428			for (pe++; pe && pe != ']'; pe++)
429			if (*p == QUOTECHAR) pe++;
430			if (!*pe)
431			yyerror("Missing ']'");
432			continue;
433
434			case QUOTECHAR: /* skip this character */
435			pe++;
436			continue;
437			}
438			pend:
439			if (brclev \|\| !*pe) {
440			yyerror("Missing '}'");
441			return (0);
442			}
443			for (pl = pm = p; pm <= pe; pm++)
444			/* the strip code was a noop */
445			switch (*pm) {
446
447			case '{':
448			brclev++;
449			continue;
450
451			case '}':
452			if (brclev) {
453			brclev--;
454			continue;
455			}
456			goto doit;
457
458			case ',':
459			if (brclev)
460			continue;
461			doit:
462			savec = *pm;
463			*pm = 0;
464			*lm = 0;
465			(void) strlcat((char )restbuf, (char )pl,
466			sizeof(restbuf));
467			(void) strlcat((char )restbuf, (char )pe + 1,
468			sizeof(restbuf));
469			*pm = savec;
470			if (s == 0) {
471			spathp = pathp;
472			expsh(restbuf);
473			pathp = spathp;
474			*pathp = 0;
475			} else if (amatch((char *)s, restbuf))
476			return (1);
477			sort();
478			pl = pm + 1;
479			continue;
480
481			case '[':
482			for (pm++; pm && pm != ']'; pm++)
483			if (*pm == QUOTECHAR) pm++;
484			if (!*pm)
485			yyerror("Missing ']'");
486			continue;
487
488			case QUOTECHAR: /* skip one character */
489			pm++;
490			continue;
491			}
492			return (0);
493			}
494
495			int
496			match(char s, char p) /* quote in p */
497			{
498			int c;
499			char *sentp;
500			char sexpany = expany;
501
502			if (s == '.' && p != '.')
503			return (0);
504			sentp = entp;
505			entp = s;
506			c = amatch(s, p);
507			entp = sentp;
508			expany = sexpany;
509			return (c);
510			}
511
512			int
513			amatch(char s, u_char p) /* quote in p */
514			{
515			int scc;
516			int ok, lc;
517			char *spathp;
518			struct stat stb;
519			int c, cc;
520
521			expany = 1;
522			for (;;) {
523			scc = *s++;
524			switch (c = *p++) {
525
526			case '{':
527			return (execbrc((u_char )p - 1, (u_char )s - 1));
528
529			case '[':
530			ok = 0;
531			lc = 077777;
532			while ((cc = *p++) != '\0') {
533			if (cc == ']') {
534			if (ok)
535			break;
536			return (0);
537			}
538			if (cc == QUOTECHAR) cc = *p++;
539			if (cc == '-') {
540			if (lc <= scc && scc <= (int)*p++)
541			ok++;
542			} else
543			if (scc == (lc = cc))
544			ok++;
545			}
546			if (cc == 0) {
547			yyerror("Missing ']'");
548			return (0);
549			}
550			continue;
551
552			case '*':
553			if (!*p)
554			return (1);
555			if (*p == '/') {
556			p++;
557			goto slash;
558			}
559			for (s--; *s; s++)
560			if (amatch(s, p))
561			return (1);
562			return (0);
563
564			case CNULL:
565			return (scc == CNULL);
566
567			default:
568			if (c != scc)
569			return (0);
570			continue;
571
572			case '?':
573			if (scc == CNULL)
574			return (0);
575			continue;
576
577			case '/':
578			if (scc)
579			return (0);
580			slash:
581			s = entp;
582			spathp = pathp;
583			while (*s)
584			addpath(*s++);
585			addpath('/');
586			if (stat(path, &stb) == 0 && S_ISDIR(stb.st_mode)) {
587			if (*p == CNULL) {
588			if (which & E_TILDE) {
589			Cat((u_char *)path,
590			(u_char *)"");
591			} else {
592			Cat((u_char *)tilde,
593			(u_char *)tpathp);
594			}
595			} else
596			expsh(p);
597			}
598			pathp = spathp;
599			*pathp = CNULL;
600			return (0);
601			}
602			}
603			}