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-rw-r--r--bin/dash/src/bltin/test.c700
1 files changed, 0 insertions, 700 deletions
diff --git a/bin/dash/src/bltin/test.c b/bin/dash/src/bltin/test.c
deleted file mode 100644
index c7fc479d..00000000
--- a/bin/dash/src/bltin/test.c
+++ /dev/null
@@ -1,700 +0,0 @@
-/*
- * test(1); version 7-like  --  author Erik Baalbergen
- * modified by Eric Gisin to be used as built-in.
- * modified by Arnold Robbins to add SVR3 compatibility
- * (-x -c -b -p -u -g -k) plus Korn's -L -nt -ot -ef and new -S (socket).
- * modified by J.T. Conklin for NetBSD.
- *
- * This program is in the Public Domain.
- */
-
-#include <sys/stat.h>
-#include <sys/types.h>
-
-#include <fcntl.h>
-#include <inttypes.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <stdarg.h>
-#include "bltin.h"
-
-/* test(1) accepts the following grammar:
-	oexpr	::= aexpr | aexpr "-o" oexpr ;
-	aexpr	::= nexpr | nexpr "-a" aexpr ;
-	nexpr	::= primary | "!" primary
-	primary	::= unary-operator operand
-		| operand binary-operator operand
-		| operand
-		| "(" oexpr ")"
-		;
-	unary-operator ::= "-r"|"-w"|"-x"|"-f"|"-d"|"-c"|"-b"|"-p"|
-		"-u"|"-g"|"-k"|"-s"|"-t"|"-z"|"-n"|"-o"|"-O"|"-G"|"-L"|"-S";
-
-	binary-operator ::= "="|"!="|"-eq"|"-ne"|"-ge"|"-gt"|"-le"|"-lt"|
-			"-nt"|"-ot"|"-ef";
-	operand ::= <any legal UNIX file name>
-*/
-
-enum token {
-	EOI,
-	FILRD,
-	FILWR,
-	FILEX,
-	FILEXIST,
-	FILREG,
-	FILDIR,
-	FILCDEV,
-	FILBDEV,
-	FILFIFO,
-	FILSOCK,
-	FILSYM,
-	FILGZ,
-	FILTT,
-	FILSUID,
-	FILSGID,
-	FILSTCK,
-	FILNT,
-	FILOT,
-	FILEQ,
-	FILUID,
-	FILGID,
-	STREZ,
-	STRNZ,
-	STREQ,
-	STRNE,
-	STRLT,
-	STRGT,
-	INTEQ,
-	INTNE,
-	INTGE,
-	INTGT,
-	INTLE,
-	INTLT,
-	UNOT,
-	BAND,
-	BOR,
-	LPAREN,
-	RPAREN,
-	OPERAND
-};
-
-enum token_types {
-	UNOP,
-	BINOP,
-	BUNOP,
-	BBINOP,
-	PAREN
-};
-
-static struct t_op {
-	const char *op_text;
-	short op_num, op_type;
-} const ops [] = {
-	{"-r",	FILRD,	UNOP},
-	{"-w",	FILWR,	UNOP},
-	{"-x",	FILEX,	UNOP},
-	{"-e",	FILEXIST,UNOP},
-	{"-f",	FILREG,	UNOP},
-	{"-d",	FILDIR,	UNOP},
-	{"-c",	FILCDEV,UNOP},
-	{"-b",	FILBDEV,UNOP},
-	{"-p",	FILFIFO,UNOP},
-	{"-u",	FILSUID,UNOP},
-	{"-g",	FILSGID,UNOP},
-	{"-k",	FILSTCK,UNOP},
-	{"-s",	FILGZ,	UNOP},
-	{"-t",	FILTT,	UNOP},
-	{"-z",	STREZ,	UNOP},
-	{"-n",	STRNZ,	UNOP},
-	{"-h",	FILSYM,	UNOP},		/* for backwards compat */
-	{"-O",	FILUID,	UNOP},
-	{"-G",	FILGID,	UNOP},
-	{"-L",	FILSYM,	UNOP},
-	{"-S",	FILSOCK,UNOP},
-	{"=",	STREQ,	BINOP},
-	{"!=",	STRNE,	BINOP},
-	{"<",	STRLT,	BINOP},
-	{">",	STRGT,	BINOP},
-	{"-eq",	INTEQ,	BINOP},
-	{"-ne",	INTNE,	BINOP},
-	{"-ge",	INTGE,	BINOP},
-	{"-gt",	INTGT,	BINOP},
-	{"-le",	INTLE,	BINOP},
-	{"-lt",	INTLT,	BINOP},
-	{"-nt",	FILNT,	BINOP},
-	{"-ot",	FILOT,	BINOP},
-	{"-ef",	FILEQ,	BINOP},
-	{"!",	UNOT,	BUNOP},
-	{"-a",	BAND,	BBINOP},
-	{"-o",	BOR,	BBINOP},
-	{"(",	LPAREN,	PAREN},
-	{")",	RPAREN,	PAREN},
-	{0,	0,	0}
-};
-
-static char **t_wp;
-static struct t_op const *t_wp_op;
-
-static void syntax(const char *, const char *);
-static int oexpr(enum token);
-static int aexpr(enum token);
-static int nexpr(enum token);
-static int primary(enum token);
-static int binop(void);
-static int filstat(char *, enum token);
-static enum token t_lex(char **);
-static int isoperand(char **);
-static int newerf(const char *, const char *);
-static int olderf(const char *, const char *);
-static int equalf(const char *, const char *);
-#ifdef HAVE_FACCESSAT
-static int test_file_access(const char *, int);
-#else
-static int test_access(const struct stat64 *, int);
-#endif
-
-#ifdef HAVE_FACCESSAT
-# ifdef HAVE_TRADITIONAL_FACCESSAT
-static inline int faccessat_confused_about_superuser(void) { return 1; }
-# else
-static inline int faccessat_confused_about_superuser(void) { return 0; }
-# endif
-#endif
-
-static inline intmax_t getn(const char *s)
-{
-	return atomax10(s);
-}
-
-static const struct t_op *getop(const char *s)
-{
-	const struct t_op *op;
-
-	for (op = ops; op->op_text; op++) {
-		if (strcmp(s, op->op_text) == 0)
-			return op;
-	}
-
-	return NULL;
-}
-
-int
-testcmd(int argc, char **argv)
-{
-	const struct t_op *op;
-	enum token n;
-	int res = 1;
-
-	if (*argv[0] == '[') {
-		if (*argv[--argc] != ']')
-			error("missing ]");
-		argv[argc] = NULL;
-	}
-
-	t_wp_op = NULL;
-
-recheck:
-	argv++;
-	argc--;
-
-	if (argc < 1)
-		return res;
-
-	/*
-	 * POSIX prescriptions: he who wrote this deserves the Nobel
-	 * peace prize.
-	 */
-	switch (argc) {
-	case 3:
-		op = getop(argv[1]);
-		if (op && op->op_type == BINOP) {
-			n = OPERAND;
-			goto eval;
-		}
-		/* fall through */
-
-	case 4:
-		if (!strcmp(argv[0], "(") && !strcmp(argv[argc - 1], ")")) {
-			argv[--argc] = NULL;
-			argv++;
-			argc--;
-		} else if (!strcmp(argv[0], "!")) {
-			res = 0;
-			goto recheck;
-		}
-	}
-
-	n = t_lex(argv);
-
-eval:
-	t_wp = argv;
-	res ^= oexpr(n);
-	argv = t_wp;
-
-	if (argv[0] != NULL && argv[1] != NULL)
-		syntax(argv[0], "unexpected operator");
-
-	return res;
-}
-
-static void
-syntax(const char *op, const char *msg)
-{
-	if (op && *op)
-		error("%s: %s", op, msg);
-	else
-		error("%s", msg);
-}
-
-static int
-oexpr(enum token n)
-{
-	int res = 0;
-
-	for (;;) {
-		res |= aexpr(n);
-		n = t_lex(t_wp + 1);
-		if (n != BOR)
-			break;
-		n = t_lex(t_wp += 2);
-	}
-	return res;
-}
-
-static int
-aexpr(enum token n)
-{
-	int res = 1;
-
-	for (;;) {
-		if (!nexpr(n))
-			res = 0;
-		n = t_lex(t_wp + 1);
-		if (n != BAND)
-			break;
-		n = t_lex(t_wp += 2);
-	}
-	return res;
-}
-
-static int
-nexpr(enum token n)
-{
-	if (n != UNOT)
-		return primary(n);
-
-	n = t_lex(t_wp + 1);
-	if (n != EOI)
-		t_wp++;
-	return !nexpr(n);
-}
-
-static int
-primary(enum token n)
-{
-	enum token nn;
-	int res;
-
-	if (n == EOI)
-		return 0;		/* missing expression */
-	if (n == LPAREN) {
-		if ((nn = t_lex(++t_wp)) == RPAREN)
-			return 0;	/* missing expression */
-		res = oexpr(nn);
-		if (t_lex(++t_wp) != RPAREN)
-			syntax(NULL, "closing paren expected");
-		return res;
-	}
-	if (t_wp_op && t_wp_op->op_type == UNOP) {
-		/* unary expression */
-		if (*++t_wp == NULL)
-			syntax(t_wp_op->op_text, "argument expected");
-		switch (n) {
-		case STREZ:
-			return strlen(*t_wp) == 0;
-		case STRNZ:
-			return strlen(*t_wp) != 0;
-		case FILTT:
-			return isatty(getn(*t_wp));
-#ifdef HAVE_FACCESSAT
-		case FILRD:
-			return test_file_access(*t_wp, R_OK);
-		case FILWR:
-			return test_file_access(*t_wp, W_OK);
-		case FILEX:
-			return test_file_access(*t_wp, X_OK);
-#endif
-		default:
-			return filstat(*t_wp, n);
-		}
-	}
-
-	if (t_lex(t_wp + 1), t_wp_op && t_wp_op->op_type == BINOP) {
-		return binop();
-	}
-
-	return strlen(*t_wp) > 0;
-}
-
-static int
-binop(void)
-{
-	const char *opnd1, *opnd2;
-	struct t_op const *op;
-
-	opnd1 = *t_wp;
-	(void) t_lex(++t_wp);
-	op = t_wp_op;
-
-	if ((opnd2 = *++t_wp) == (char *)0)
-		syntax(op->op_text, "argument expected");
-
-	switch (op->op_num) {
-	default:
-#ifdef DEBUG
-		abort();
-		/* NOTREACHED */
-#endif
-	case STREQ:
-		return strcmp(opnd1, opnd2) == 0;
-	case STRNE:
-		return strcmp(opnd1, opnd2) != 0;
-	case STRLT:
-		return strcmp(opnd1, opnd2) < 0;
-	case STRGT:
-		return strcmp(opnd1, opnd2) > 0;
-	case INTEQ:
-		return getn(opnd1) == getn(opnd2);
-	case INTNE:
-		return getn(opnd1) != getn(opnd2);
-	case INTGE:
-		return getn(opnd1) >= getn(opnd2);
-	case INTGT:
-		return getn(opnd1) > getn(opnd2);
-	case INTLE:
-		return getn(opnd1) <= getn(opnd2);
-	case INTLT:
-		return getn(opnd1) < getn(opnd2);
-	case FILNT:
-		return newerf (opnd1, opnd2);
-	case FILOT:
-		return olderf (opnd1, opnd2);
-	case FILEQ:
-		return equalf (opnd1, opnd2);
-	}
-}
-
-static int
-filstat(char *nm, enum token mode)
-{
-	struct stat64 s;
-
-	if (mode == FILSYM ? lstat64(nm, &s) : stat64(nm, &s))
-		return 0;
-
-	switch (mode) {
-#ifndef HAVE_FACCESSAT
-	case FILRD:
-		return test_access(&s, R_OK);
-	case FILWR:
-		return test_access(&s, W_OK);
-	case FILEX:
-		return test_access(&s, X_OK);
-#endif
-	case FILEXIST:
-		return 1;
-	case FILREG:
-		return S_ISREG(s.st_mode);
-	case FILDIR:
-		return S_ISDIR(s.st_mode);
-	case FILCDEV:
-		return S_ISCHR(s.st_mode);
-	case FILBDEV:
-		return S_ISBLK(s.st_mode);
-	case FILFIFO:
-		return S_ISFIFO(s.st_mode);
-	case FILSOCK:
-		return S_ISSOCK(s.st_mode);
-	case FILSYM:
-		return S_ISLNK(s.st_mode);
-	case FILSUID:
-		return (s.st_mode & S_ISUID) != 0;
-	case FILSGID:
-		return (s.st_mode & S_ISGID) != 0;
-	case FILSTCK:
-		return (s.st_mode & S_ISVTX) != 0;
-	case FILGZ:
-		return !!s.st_size;
-	case FILUID:
-		return s.st_uid == geteuid();
-	case FILGID:
-		return s.st_gid == getegid();
-	default:
-		return 1;
-	}
-}
-
-static enum token t_lex(char **tp)
-{
-	struct t_op const *op;
-	char *s = *tp;
-
-	if (s == 0) {
-		t_wp_op = (struct t_op *)0;
-		return EOI;
-	}
-
-	op = getop(s);
-	if (op && !(op->op_type == UNOP && isoperand(tp)) &&
-	    !(op->op_num == LPAREN && !tp[1])) {
-		t_wp_op = op;
-		return op->op_num;
-	}
-
-	t_wp_op = (struct t_op *)0;
-	return OPERAND;
-}
-
-static int isoperand(char **tp)
-{
-	struct t_op const *op;
-	char *s;
-
-	if (!(s = tp[1]))
-		return 1;
-	if (!tp[2])
-		return 0;
-
-	op = getop(s);
-	return op && op->op_type == BINOP;
-}
-
-static int
-newerf (const char *f1, const char *f2)
-{
-	struct stat64 b1, b2;
-
-#ifdef HAVE_ST_MTIM
-	return (stat64(f1, &b1) == 0 &&
-		stat64(f2, &b2) == 0 &&
-		( b1.st_mtim.tv_sec > b2.st_mtim.tv_sec ||
-		 (b1.st_mtim.tv_sec == b2.st_mtim.tv_sec && (b1.st_mtim.tv_nsec > b2.st_mtim.tv_nsec )))
-	);
-#else
-	return (stat64(f1, &b1) == 0 &&
-		stat64(f2, &b2) == 0 &&
-		b1.st_mtime > b2.st_mtime);
-#endif
-}
-
-static int
-olderf (const char *f1, const char *f2)
-{
-	struct stat64 b1, b2;
-
-#ifdef HAVE_ST_MTIM
-	return (stat64(f1, &b1) == 0 &&
-		stat64(f2, &b2) == 0 &&
-		(b1.st_mtim.tv_sec < b2.st_mtim.tv_sec ||
-		 (b1.st_mtim.tv_sec == b2.st_mtim.tv_sec && (b1.st_mtim.tv_nsec < b2.st_mtim.tv_nsec )))
-	);
-#else
-	return (stat64(f1, &b1) == 0 &&
-		stat64(f2, &b2) == 0 &&
-		b1.st_mtime < b2.st_mtime);
-#endif
-}
-
-static int
-equalf (const char *f1, const char *f2)
-{
-	struct stat64 b1, b2;
-
-	return (stat64(f1, &b1) == 0 &&
-		stat64(f2, &b2) == 0 &&
-		b1.st_dev == b2.st_dev &&
-		b1.st_ino == b2.st_ino);
-}
-
-#ifdef HAVE_FACCESSAT
-static int has_exec_bit_set(const char *path)
-{
-	struct stat64 st;
-
-	if (stat64(path, &st))
-		return 0;
-	return st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH);
-}
-
-static int test_file_access(const char *path, int mode)
-{
-	if (faccessat_confused_about_superuser() &&
-	    mode == X_OK && geteuid() == 0 && !has_exec_bit_set(path))
-		return 0;
-	return !faccessat(AT_FDCWD, path, mode, AT_EACCESS);
-}
-#else	/* HAVE_FACCESSAT */
-/*
- * The manual, and IEEE POSIX 1003.2, suggests this should check the mode bits,
- * not use access():
- *
- *	True shall indicate only that the write flag is on.  The file is not
- *	writable on a read-only file system even if this test indicates true.
- *
- * Unfortunately IEEE POSIX 1003.1-2001, as quoted in SuSv3, says only:
- *
- *	True shall indicate that permission to read from file will be granted,
- *	as defined in "File Read, Write, and Creation".
- *
- * and that section says:
- *
- *	When a file is to be read or written, the file shall be opened with an
- *	access mode corresponding to the operation to be performed.  If file
- *	access permissions deny access, the requested operation shall fail.
- *
- * and of course access permissions are described as one might expect:
- *
- *     * If a process has the appropriate privilege:
- *
- *        * If read, write, or directory search permission is requested,
- *          access shall be granted.
- *
- *        * If execute permission is requested, access shall be granted if
- *          execute permission is granted to at least one user by the file
- *          permission bits or by an alternate access control mechanism;
- *          otherwise, access shall be denied.
- *
- *   * Otherwise:
- *
- *        * The file permission bits of a file contain read, write, and
- *          execute/search permissions for the file owner class, file group
- *          class, and file other class.
- *
- *        * Access shall be granted if an alternate access control mechanism
- *          is not enabled and the requested access permission bit is set for
- *          the class (file owner class, file group class, or file other class)
- *          to which the process belongs, or if an alternate access control
- *          mechanism is enabled and it allows the requested access; otherwise,
- *          access shall be denied.
- *
- * and when I first read this I thought:  surely we can't go about using
- * open(O_WRONLY) to try this test!  However the POSIX 1003.1-2001 Rationale
- * section for test does in fact say:
- *
- *	On historical BSD systems, test -w directory always returned false
- *	because test tried to open the directory for writing, which always
- *	fails.
- *
- * and indeed this is in fact true for Seventh Edition UNIX, UNIX 32V, and UNIX
- * System III, and thus presumably also for BSD up to and including 4.3.
- *
- * Secondly I remembered why using open() and/or access() are bogus.  They
- * don't work right for detecting read and write permissions bits when called
- * by root.
- *
- * Interestingly the 'test' in 4.4BSD was closer to correct (as per
- * 1003.2-1992) and it was implemented efficiently with stat() instead of
- * open().
- *
- * This was apparently broken in NetBSD around about 1994/06/30 when the old
- * 4.4BSD implementation was replaced with a (arguably much better coded)
- * implementation derived from pdksh.
- *
- * Note that modern pdksh is yet different again, but still not correct, at
- * least not w.r.t. 1003.2-1992.
- *
- * As I think more about it and read more of the related IEEE docs I don't like
- * that wording about 'test -r' and 'test -w' in 1003.1-2001 at all.  I very
- * much prefer the original wording in 1003.2-1992.  It is much more useful,
- * and so that's what I've implemented.
- *
- * (Note that a strictly conforming implementation of 1003.1-2001 is in fact
- * totally useless for the case in question since its 'test -w' and 'test -r'
- * can never fail for root for any existing files, i.e. files for which 'test
- * -e' succeeds.)
- *
- * The rationale for 1003.1-2001 suggests that the wording was "clarified" in
- * 1003.1-2001 to align with the 1003.2b draft.  1003.2b Draft 12 (July 1999),
- * which is the latest copy I have, does carry the same suggested wording as is
- * in 1003.1-2001, with its rationale saying:
- *
- * 	This change is a clarification and is the result of interpretation
- * 	request PASC 1003.2-92 #23 submitted for IEEE Std 1003.2-1992.
- *
- * That interpretation can be found here:
- *
- *   http://www.pasc.org/interps/unofficial/db/p1003.2/pasc-1003.2-23.html
- *
- * Not terribly helpful, unfortunately.  I wonder who that fence sitter was.
- *
- * Worse, IMVNSHO, I think the authors of 1003.2b-D12 have mis-interpreted the
- * PASC interpretation and appear to be gone against at least one widely used
- * implementation (namely 4.4BSD).  The problem is that for file access by root
- * this means that if test '-r' and '-w' are to behave as if open() were called
- * then there's no way for a shell script running as root to check if a file
- * has certain access bits set other than by the grotty means of interpreting
- * the output of 'ls -l'.  This was widely considered to be a bug in V7's
- * "test" and is, I believe, one of the reasons why direct use of access() was
- * avoided in some more recent implementations!
- *
- * I have always interpreted '-r' to match '-w' and '-x' as per the original
- * wording in 1003.2-1992, not the other way around.  I think 1003.2b goes much
- * too far the wrong way without any valid rationale and that it's best if we
- * stick with 1003.2-1992 and test the flags, and not mimic the behaviour of
- * open() since we already know very well how it will work -- existance of the
- * file is all that matters to open() for root.
- *
- * Unfortunately the SVID is no help at all (which is, I guess, partly why
- * we're in this mess in the first place :-).
- *
- * The SysV implementation (at least in the 'test' builtin in /bin/sh) does use
- * access(name, 2) even though it also goes to much greater lengths for '-x'
- * matching the 1003.2-1992 definition (which is no doubt where that definition
- * came from).
- *
- * The ksh93 implementation uses access() for '-r' and '-w' if
- * (euid==uid&&egid==gid), but uses st_mode for '-x' iff running as root.
- * i.e. it does strictly conform to 1003.1-2001 (and presumably 1003.2b).
- */
-static int test_access(const struct stat64 *sp, int stmode)
-{
-	gid_t *groups;
-	register int n;
-	uid_t euid;
-	int maxgroups;
-
-	/*
-	 * I suppose we could use access() if not running as root and if we are
-	 * running with ((euid == uid) && (egid == gid)), but we've already
-	 * done the stat() so we might as well just test the permissions
-	 * directly instead of asking the kernel to do it....
-	 */
-	euid = geteuid();
-	if (euid == 0) {
-		if (stmode != X_OK)
-			return 1;
-
-		/* any bit is good enough */
-		stmode = (stmode << 6) | (stmode << 3) | stmode;
-	} else if (sp->st_uid == euid)
-		stmode <<= 6;
-	else if (sp->st_gid == getegid())
-		stmode <<= 3;
-	else {
-		/* XXX stolen almost verbatim from ksh93.... */
-		/* on some systems you can be in several groups */
-		maxgroups = getgroups(0, NULL);
-		groups = stalloc(maxgroups * sizeof(*groups));
-		n = getgroups(maxgroups, groups);
-		while (--n >= 0) {
-			if (groups[n] == sp->st_gid) {
-				stmode <<= 3;
-				break;
-			}
-		}
-	}
-
-	return sp->st_mode & stmode;
-}
-#endif	/* HAVE_FACCESSAT */
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-04-26 23:35:54 +0000