* in busybox.
* modified by Bernhard Reutner-Fischer to be useable (i.e. a bit less bloaty).
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*
* Original copyright notice states:
* "This program is in the Public Domain."
*/
+//config:config TEST
+//config: bool "test (3.6 kb)"
+//config: default y
+//config: help
+//config: test is used to check file types and compare values,
+//config: returning an appropriate exit code. The bash shell
+//config: has test built in, ash can build it in optionally.
+//config:
+//config:config TEST1
+//config: bool "test as ["
+//config: default y
+//config: help
+//config: Provide test command in the "[ EXPR ]" form
+//config:
+//config:config TEST2
+//config: bool "test as [["
+//config: default y
+//config: help
+//config: Provide test command in the "[[ EXPR ]]" form
+//config:
+//config:config FEATURE_TEST_64
+//config: bool "Extend test to 64 bit"
+//config: default y
+//config: depends on TEST || TEST1 || TEST2 || ASH_TEST || HUSH_TEST
+//config: help
+//config: Enable 64-bit support in test.
+
+//applet:IF_TEST(APPLET_NOFORK(test, test, BB_DIR_USR_BIN, BB_SUID_DROP, test))
+//applet:IF_TEST1(APPLET_NOFORK([, test, BB_DIR_USR_BIN, BB_SUID_DROP, test))
+//applet:IF_TEST2(APPLET_NOFORK([[, test, BB_DIR_USR_BIN, BB_SUID_DROP, test))
+
+//kbuild:lib-$(CONFIG_TEST) += test.o test_ptr_hack.o
+//kbuild:lib-$(CONFIG_TEST1) += test.o test_ptr_hack.o
+//kbuild:lib-$(CONFIG_TEST2) += test.o test_ptr_hack.o
+
+//kbuild:lib-$(CONFIG_ASH_TEST) += test.o test_ptr_hack.o
+//kbuild:lib-$(CONFIG_HUSH_TEST) += test.o test_ptr_hack.o
+
+/* "test --help" is special-cased to ignore --help */
+//usage:#define test_trivial_usage NOUSAGE_STR
+//usage:#define test_full_usage ""
+//usage:
+//usage:#define test_example_usage
+//usage: "$ test 1 -eq 2\n"
+//usage: "$ echo $?\n"
+//usage: "1\n"
+//usage: "$ test 1 -eq 1\n"
+//usage: "$ echo $?\n"
+//usage: "0\n"
+//usage: "$ [ -d /etc ]\n"
+//usage: "$ echo $?\n"
+//usage: "0\n"
+//usage: "$ [ -d /junk ]\n"
+//usage: "$ echo $?\n"
+//usage: "1\n"
#include "libbb.h"
-#include <setjmp.h>
/* This is a NOFORK applet. Be very careful! */
/* test_main() is called from shells, and we need to be extra careful here.
- * This is true regardless of PREFER_APPLETS and STANDALONE_SHELL
+ * This is true regardless of PREFER_APPLETS and SH_STANDALONE
* state. */
-
/* test(1) accepts the following grammar:
- oexpr ::= aexpr | aexpr "-o" oexpr ;
- aexpr ::= nexpr | nexpr "-a" aexpr ;
- nexpr ::= primary | "!" primary
+ oexpr ::= aexpr | aexpr "-o" oexpr ;
+ aexpr ::= nexpr | nexpr "-a" aexpr ;
+ nexpr ::= primary | "!" primary
primary ::= unary-operator operand
| operand binary-operator operand
| operand
operand ::= <any legal UNIX file name>
*/
+/* TODO: handle [[ expr ]] bashism bash-compatibly.
+ * [[ ]] is meant to be a "better [ ]", with less weird syntax
+ * and without the risk of variables and quoted strings misinterpreted
+ * as operators.
+ * This will require support from shells - we need to know quote status
+ * of each parameter (see below).
+ *
+ * Word splitting and pathname expansion should NOT be performed:
+ * # a="a b"; [[ $a = "a b" ]] && echo YES
+ * YES
+ * # [[ /bin/m* ]] && echo YES
+ * YES
+ *
+ * =~ should do regexp match
+ * = and == should do pattern match against right side:
+ * # [[ *a* == bab ]] && echo YES
+ * # [[ bab == *a* ]] && echo YES
+ * YES
+ * != does the negated == (i.e., also with pattern matching).
+ * Pattern matching is quotation-sensitive:
+ * # [[ bab == "b"a* ]] && echo YES
+ * YES
+ * # [[ bab == b"a*" ]] && echo YES
+ *
+ * Conditional operators such as -f must be unquoted literals to be recognized:
+ * # [[ -e /bin ]] && echo YES
+ * YES
+ * # [[ '-e' /bin ]] && echo YES
+ * bash: conditional binary operator expected...
+ * # A='-e'; [[ $A /bin ]] && echo YES
+ * bash: conditional binary operator expected...
+ *
+ * || and && should work as -o and -a work in [ ]
+ * -a and -o aren't recognized (&& and || are to be used instead)
+ * ( and ) do not need to be quoted unlike in [ ]:
+ * # [[ ( abc ) && '' ]] && echo YES
+ * # [[ ( abc ) || '' ]] && echo YES
+ * YES
+ * # [[ ( abc ) -o '' ]] && echo YES
+ * bash: syntax error in conditional expression...
+ *
+ * Apart from the above, [[ expr ]] should work as [ expr ]
+ */
+
#define TEST_DEBUG 0
enum token {
#define unnest_msg_and_return(expr, ...) return expr
#endif
-enum token_types {
+enum {
UNOP,
BINOP,
BUNOP,
};
struct operator_t {
- char op_text[4];
unsigned char op_num, op_type;
};
-static const struct operator_t 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 },
- { "==" , 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 },
+static const struct operator_t ops_table[] = {
+ { /* "-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 },
+ /* "==" is bashism, http://pubs.opengroup.org/onlinepubs/9699919799/utilities/test.html
+ * lists only "=" as comparison operator.
+ */
+ { /* "==" */ 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 },
};
+/* Please keep these two tables in sync */
+static const char ops_texts[] ALIGN1 =
+ "-r" "\0"
+ "-w" "\0"
+ "-x" "\0"
+ "-e" "\0"
+ "-f" "\0"
+ "-d" "\0"
+ "-c" "\0"
+ "-b" "\0"
+ "-p" "\0"
+ "-u" "\0"
+ "-g" "\0"
+ "-k" "\0"
+ "-s" "\0"
+ "-t" "\0"
+ "-z" "\0"
+ "-n" "\0"
+ "-h" "\0"
+
+ "-O" "\0"
+ "-G" "\0"
+ "-L" "\0"
+ "-S" "\0"
+ "=" "\0"
+ /* "==" is bashism */
+ "==" "\0"
+ "!=" "\0"
+ "<" "\0"
+ ">" "\0"
+ "-eq" "\0"
+ "-ne" "\0"
+ "-ge" "\0"
+ "-gt" "\0"
+ "-le" "\0"
+ "-lt" "\0"
+ "-nt" "\0"
+ "-ot" "\0"
+ "-ef" "\0"
+ "!" "\0"
+ "-a" "\0"
+ "-o" "\0"
+ "(" "\0"
+ ")" "\0"
+;
#if ENABLE_FEATURE_TEST_64
barrier(); \
} while (0)
#define DEINIT_S() do { \
+ free(group_array); \
free(test_ptr_to_statics); \
} while (0)
if (errno != 0)
syntax(s, "out of range");
- if (*(skip_whitespace(p)))
+ if (p == s || *(skip_whitespace(p)) != '\0')
syntax(s, "bad number");
return r;
*/
-static enum token check_operator(char *s)
+static enum token check_operator(const char *s)
{
static const struct operator_t no_op = {
.op_num = -1,
.op_type = -1
};
- const struct operator_t *op;
+ int n;
last_operator = &no_op;
- if (s == NULL) {
+ if (s == NULL)
return EOI;
- }
-
- op = ops;
- do {
- if (strcmp(s, op->op_text) == 0) {
- last_operator = op;
- return op->op_num;
- }
- op++;
- } while (op < ops + ARRAY_SIZE(ops));
-
- return OPERAND;
+ n = index_in_strings(ops_texts, s);
+ if (n < 0)
+ return OPERAND;
+ last_operator = &ops_table[n];
+ return ops_table[n].op_num;
}
opnd2 = *++args;
if (opnd2 == NULL)
- syntax(op->op_text, "argument expected");
+ syntax(args[-1], "argument expected");
if (is_int_op(op->op_num)) {
val1 = getn(opnd1);
/*return 1; - NOTREACHED */
}
-
static void initialize_group_array(void)
{
- int n;
-
- /* getgroups may be expensive, try to use it only once */
- ngroups = 32;
- do {
- /* FIXME: ash tries so hard to not die on OOM,
- * and we spoil it with just one xrealloc here */
- /* We realloc, because test_main can be entered repeatedly by shell.
- * Testcase (ash): 'while true; do test -x some_file; done'
- * and watch top. (some_file must have owner != you) */
- n = ngroups;
- group_array = xrealloc(group_array, n * sizeof(gid_t));
- ngroups = getgroups(n, group_array);
- } while (ngroups > n);
+ group_array = bb_getgroups(&ngroups, NULL);
}
-
/* Return non-zero if GID is one that we have in our groups list. */
//XXX: FIXME: duplicate of existing libbb function?
// see toplevel TODO file:
/* Do the same thing access(2) does, but use the effective uid and gid,
and don't make the mistake of telling root that any file is
executable. */
-static int test_eaccess(char *path, int mode)
+static int test_eaccess(struct stat *st, int mode)
{
- struct stat st;
unsigned int euid = geteuid();
- if (stat(path, &st) < 0)
- return -1;
-
if (euid == 0) {
/* Root can read or write any file. */
if (mode != X_OK)
return 0;
/* Root can execute any file that has any one of the execute
- bits set. */
- if (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))
+ * bits set. */
+ if (st->st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))
return 0;
}
- if (st.st_uid == euid) /* owner */
+ if (st->st_uid == euid) /* owner */
mode <<= 6;
- else if (is_a_group_member(st.st_gid))
+ else if (is_a_group_member(st->st_gid))
mode <<= 3;
- if (st.st_mode & mode)
+ if (st->st_mode & mode)
return 0;
return -1;
i = W_OK;
if (mode == FILEX)
i = X_OK;
- return test_eaccess(nm, i) == 0;
+ return test_eaccess(&s, i) == 0;
}
if (is_file_type(mode)) {
if (mode == FILREG)
nest_msg(">nexpr(%s)\n", TOKSTR[n]);
if (n == UNOT) {
- res = !nexpr(check_operator(*++args));
+ n = check_operator(*++args);
+ if (n == EOI) {
+ /* special case: [ ! ], [ a -a ! ] are valid */
+ /* IOW, "! ARG" may miss ARG */
+ args--;
+ unnest_msg("<nexpr:1 (!EOI), args:%s(%p)\n", args[0], &args[0]);
+ return 1;
+ }
+ res = !nexpr(n);
unnest_msg("<nexpr:%lld\n", res);
return res;
}
nest_msg(">aexpr(%s)\n", TOKSTR[n]);
res = nexpr(n);
- dbg_msg("aexpr: nexpr:%lld, next args:%s\n", res, args[1]);
+ dbg_msg("aexpr: nexpr:%lld, next args:%s(%p)\n", res, args[1], &args[1]);
if (check_operator(*++args) == BAND) {
- dbg_msg("aexpr: arg is AND, next args:%s\n", args[1]);
+ dbg_msg("aexpr: arg is AND, next args:%s(%p)\n", args[1], &args[1]);
res = aexpr(check_operator(*++args)) && res;
unnest_msg("<aexpr:%lld\n", res);
return res;
}
args--;
- unnest_msg("<aexpr:%lld, args:%s\n", res, args[0]);
+ unnest_msg("<aexpr:%lld, args:%s(%p)\n", res, args[0], &args[0]);
return res;
}
nest_msg(">oexpr(%s)\n", TOKSTR[n]);
res = aexpr(n);
- dbg_msg("oexpr: aexpr:%lld, next args:%s\n", res, args[1]);
+ dbg_msg("oexpr: aexpr:%lld, next args:%s(%p)\n", res, args[1], &args[1]);
if (check_operator(*++args) == BOR) {
- dbg_msg("oexpr: next arg is OR, next args:%s\n", args[1]);
+ dbg_msg("oexpr: next arg is OR, next args:%s(%p)\n", args[1], &args[1]);
res = oexpr(check_operator(*++args)) || res;
unnest_msg("<oexpr:%lld\n", res);
return res;
}
args--;
- unnest_msg("<oexpr:%lld, args:%s\n", res, args[0]);
+ unnest_msg("<oexpr:%lld, args:%s(%p)\n", res, args[0], &args[0]);
return res;
}
{
int res;
const char *arg0;
-// bool negate = 0;
arg0 = bb_basename(argv[0]);
- if (arg0[0] == '[') {
+ if ((ENABLE_TEST1 || ENABLE_TEST2 || ENABLE_ASH_TEST || ENABLE_HUSH_TEST)
+ && (arg0[0] == '[')
+ ) {
--argc;
if (!arg0[1]) { /* "[" ? */
if (NOT_LONE_CHAR(argv[argc], ']')) {
}
argv[argc] = NULL;
}
+ /* argc is unused after this point */
/* We must do DEINIT_S() prior to returning */
INIT_S();
*/
/*ngroups = 0; - done by INIT_S() */
- //argc--;
argv++;
+ args = argv;
- /* Implement special cases from POSIX.2, section 4.62.4 */
- if (!argv[0]) { /* "test" */
- res = 1;
- goto ret;
- }
-#if 0
-// Now it's fixed in the parser and should not be needed
- if (LONE_CHAR(argv[0], '!') && argv[1]) {
- negate = 1;
- //argc--;
- argv++;
- }
- if (!argv[1]) { /* "test [!] arg" */
- res = (*argv[0] == '\0');
- goto ret;
- }
- if (argv[2] && !argv[3]) {
- check_operator(argv[1]);
- if (last_operator->op_type == BINOP) {
- /* "test [!] arg1 <binary_op> arg2" */
- args = &argv[0];
- res = (binop() == 0);
- goto ret;
+ /* Implement special cases from POSIX.2, section 4.62.4.
+ * Testcase: "test '(' = '('"
+ * The general parser would misinterpret '(' as group start.
+ */
+ if (1) {
+ int negate = 0;
+ again:
+ if (!argv[0]) {
+ /* "test" */
+ res = 1;
+ goto ret_special;
+ }
+ if (!argv[1]) {
+ /* "test [!] arg" */
+ res = (argv[0][0] == '\0');
+ goto ret_special;
+ }
+ if (argv[2]) {
+ if (!argv[3]) {
+ /*
+ * http://pubs.opengroup.org/onlinepubs/009695399/utilities/test.html
+ * """ 3 arguments:
+ * If $2 is a binary primary, perform the binary test of $1 and $3.
+ * """
+ */
+ check_operator(argv[1]);
+ if (last_operator->op_type == BINOP) {
+ /* "test [!] arg1 <binary_op> arg2" */
+ args = argv;
+ res = (binop() == 0);
+ ret_special:
+ /* If there was leading "!" op... */
+ res ^= negate;
+ goto ret;
+ }
+ /* """If $1 is '(' and $3 is ')', perform the unary test of $2."""
+ * Looks like this works without additional coding.
+ */
+ goto check_negate;
+ }
+ /* argv[3] exists (at least 4 args), is it exactly 4 args? */
+ if (!argv[4]) {
+ /*
+ * """ 4 arguments:
+ * If $1 is '!', negate the three-argument test of $2, $3, and $4.
+ * If $1 is '(' and $4 is ')', perform the two-argument test of $2 and $3.
+ * """
+ * Example why code below is necessary: test '(' ! -e ')'
+ */
+ if (LONE_CHAR(argv[0], '(')
+ && LONE_CHAR(argv[3], ')')
+ ) {
+ /* "test [!] ( x y )" */
+ argv[3] = NULL;
+ argv++;
+ }
+ }
+ }
+ check_negate:
+ if (LONE_CHAR(argv[0], '!')) {
+ argv++;
+ negate ^= 1;
+ goto again;
}
}
- /* Some complex expression. Undo '!' removal */
- if (negate) {
- negate = 0;
- //argc++;
- argv--;
- }
-#endif
- args = &argv[0];
res = !oexpr(check_operator(*args));
if (*args != NULL && *++args != NULL) {
- /* TODO: example when this happens? */
+ /* Examples:
+ * test 3 -lt 5 6
+ * test -t 1 2
+ */
bb_error_msg("%s: unknown operand", *args);
res = 2;
}
ret:
DEINIT_S();
-// return negate ? !res : res;
return res;
}
projects / oweals / busybox.git / blobdiff