* modified by Herbert Xu to be used as built-in in ash.
* modified by Erik Andersen <andersen@codepoet.org> to be used
* 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."
*/
-#include "busybox.h"
-#include <unistd.h>
-#include <ctype.h>
-#include <errno.h>
-#include <string.h>
+//kbuild:lib-$(CONFIG_TEST) += test.o test_ptr_hack.o
+//kbuild:lib-$(CONFIG_ASH) += test.o test_ptr_hack.o
+//kbuild:lib-$(CONFIG_HUSH) += test.o test_ptr_hack.o
+
+//config:config TEST
+//config: bool "test"
+//config: default y
+//config: help
+//config: test is used to check file types and compare values,
+//config: returning an appropriate exit code. The bash shell
+//config: has test built in, ash can build it in optionally.
+//config:
+//config:config FEATURE_TEST_64
+//config: bool "Extend test to 64 bit"
+//config: default y
+//config: depends on TEST || ASH_BUILTIN_TEST || HUSH
+//config: help
+//config: Enable 64-bit support in test.
+
+/* "test --help" does not print help (POSIX compat), only "[ --help" does.
+ * We display "<applet> EXPRESSION ]" here (not "<applet> EXPRESSION")
+ * Unfortunately, it screws up generated BusyBox.html. TODO. */
+//usage:#define test_trivial_usage
+//usage: "EXPRESSION ]"
+//usage:#define test_full_usage "\n\n"
+//usage: "Check file types, compare values etc. Return a 0/1 exit code\n"
+//usage: "depending on logical value of EXPRESSION"
+//usage:
+//usage:#define test_example_usage
+//usage: "$ 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 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 {
EOI,
- FILRD,
+
+ FILRD, /* file access */
FILWR,
FILEX,
+
FILEXIST,
- FILREG,
+
+ FILREG, /* file type */
FILDIR,
FILCDEV,
FILBDEV,
FILFIFO,
FILSOCK,
+
FILSYM,
FILGZ,
FILTT,
- FILSUID,
+
+ FILSUID, /* file bit */
FILSGID,
FILSTCK,
- FILNT,
+
+ FILNT, /* file ops */
FILOT,
FILEQ,
+
FILUID,
FILGID,
- STREZ,
+
+ STREZ, /* str ops */
STRNZ,
STREQ,
STRNE,
STRLT,
STRGT,
- INTEQ,
+
+ INTEQ, /* int ops */
INTNE,
INTGE,
INTGT,
INTLE,
INTLT,
+
UNOT,
BAND,
BOR,
RPAREN,
OPERAND
};
+#define is_int_op(a) (((unsigned char)((a) - INTEQ)) <= 5)
+#define is_str_op(a) (((unsigned char)((a) - STREZ)) <= 5)
+#define is_file_op(a) (((unsigned char)((a) - FILNT)) <= 2)
+#define is_file_access(a) (((unsigned char)((a) - FILRD)) <= 2)
+#define is_file_type(a) (((unsigned char)((a) - FILREG)) <= 5)
+#define is_file_bit(a) (((unsigned char)((a) - FILSUID)) <= 2)
+
+#if TEST_DEBUG
+int depth;
+#define nest_msg(...) do { \
+ depth++; \
+ fprintf(stderr, "%*s", depth*2, ""); \
+ fprintf(stderr, __VA_ARGS__); \
+} while (0)
+#define unnest_msg(...) do { \
+ fprintf(stderr, "%*s", depth*2, ""); \
+ fprintf(stderr, __VA_ARGS__); \
+ depth--; \
+} while (0)
+#define dbg_msg(...) do { \
+ fprintf(stderr, "%*s", depth*2, ""); \
+ fprintf(stderr, __VA_ARGS__); \
+} while (0)
+#define unnest_msg_and_return(expr, ...) do { \
+ number_t __res = (expr); \
+ fprintf(stderr, "%*s", depth*2, ""); \
+ fprintf(stderr, __VA_ARGS__, res); \
+ depth--; \
+ return __res; \
+} while (0)
+static const char *const TOKSTR[] = {
+ "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"
+};
+#else
+#define nest_msg(...) ((void)0)
+#define unnest_msg(...) ((void)0)
+#define dbg_msg(...) ((void)0)
+#define unnest_msg_and_return(expr, ...) return expr
+#endif
-enum token_types {
+enum {
UNOP,
BINOP,
BUNOP,
PAREN
};
-static const struct t_op {
- const char *op_text;
- short op_num, op_type;
-} 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}, {
- 0, 0, 0}
+struct operator_t {
+ unsigned char op_num, op_type;
};
-#ifdef CONFIG_FEATURE_TEST_64
-typedef int64_t arith_t;
+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 },
+ { /* "==" */ 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"
+ "==" "\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
+typedef int64_t number_t;
#else
-typedef int arith_t;
+typedef int number_t;
#endif
-static char **t_wp;
-static struct t_op const *t_wp_op;
-static gid_t *group_array;
-static int ngroups;
-
-static enum token t_lex(char *s);
-static arith_t oexpr(enum token n);
-static arith_t aexpr(enum token n);
-static arith_t nexpr(enum token n);
-static int binop(void);
-static arith_t primary(enum token n);
-static int filstat(char *nm, enum token mode);
-static arith_t getn(const char *s);
-static int newerf(const char *f1, const char *f2);
-static int olderf(const char *f1, const char *f2);
-static int equalf(const char *f1, const char *f2);
-static int test_eaccess(char *path, int mode);
-static int is_a_group_member(gid_t gid);
-static void initialize_group_array(void);
-
-static jmp_buf leaving;
-
-int bb_test(int argc, char **argv)
-{
- int res;
-
- if (strcmp(argv[0], "[") == 0) {
- if (strcmp(argv[--argc], "]")) {
- bb_error_msg("missing ]");
- return 2;
- }
- argv[argc] = NULL;
- } else if (strcmp(argv[0], "[[") == 0) {
- if (strcmp(argv[--argc], "]]")) {
- bb_error_msg("missing ]]");
- return 2;
- }
- argv[argc] = NULL;
- }
- res = setjmp(leaving);
- if (res)
- return res;
+/* We try to minimize both static and stack usage. */
+struct test_statics {
+ char **args;
+ /* set only by check_operator(), either to bogus struct
+ * or points to matching operator_t struct. Never NULL. */
+ const struct operator_t *last_operator;
+ gid_t *group_array;
+ int ngroups;
+ jmp_buf leaving;
+};
- /* resetting ngroups is probably unnecessary. it will
- * force a new call to getgroups(), which prevents using
- * group data fetched during a previous call. but the
- * only way the group data could be stale is if there's
- * been an intervening call to setgroups(), and this
- * isn't likely in the case of a shell. paranoia
- * prevails...
- */
- ngroups = 0;
+/* See test_ptr_hack.c */
+extern struct test_statics *const test_ptr_to_statics;
- /* Implement special cases from POSIX.2, section 4.62.4 */
- switch (argc) {
- case 1:
- return 1;
- case 2:
- return *argv[1] == '\0';
- case 3:
- if (argv[1][0] == '!' && argv[1][1] == '\0') {
- return *argv[2] != '\0';
- }
- break;
- case 4:
- if (argv[1][0] != '!' || argv[1][1] != '\0') {
- if (t_lex(argv[2]), t_wp_op && t_wp_op->op_type == BINOP) {
- t_wp = &argv[1];
- return binop() == 0;
- }
- }
- break;
- case 5:
- if (argv[1][0] == '!' && argv[1][1] == '\0') {
- if (t_lex(argv[3]), t_wp_op && t_wp_op->op_type == BINOP) {
- t_wp = &argv[2];
- return binop() != 0;
- }
- }
- break;
- }
+#define S (*test_ptr_to_statics)
+#define args (S.args )
+#define last_operator (S.last_operator)
+#define group_array (S.group_array )
+#define ngroups (S.ngroups )
+#define leaving (S.leaving )
- t_wp = &argv[1];
- res = !oexpr(t_lex(*t_wp));
+#define INIT_S() do { \
+ (*(struct test_statics**)&test_ptr_to_statics) = xzalloc(sizeof(S)); \
+ barrier(); \
+} while (0)
+#define DEINIT_S() do { \
+ free(test_ptr_to_statics); \
+} while (0)
- if (*t_wp != NULL && *++t_wp != NULL) {
- bb_error_msg("%s: unknown operand", *t_wp);
- return 2;
- }
- return res;
-}
+static number_t primary(enum token n);
+static void syntax(const char *op, const char *msg) NORETURN;
static void syntax(const char *op, const char *msg)
{
if (op && *op) {
bb_error_msg("%s: %s", op, msg);
} else {
- bb_error_msg("%s", msg);
+ bb_error_msg("%s: %s"+4, msg);
}
longjmp(leaving, 2);
}
-static arith_t oexpr(enum token n)
-{
- arith_t res;
-
- res = aexpr(n);
- if (t_lex(*++t_wp) == BOR) {
- return oexpr(t_lex(*++t_wp)) || res;
- }
- t_wp--;
- return res;
-}
-
-static arith_t aexpr(enum token n)
-{
- arith_t res;
-
- res = nexpr(n);
- if (t_lex(*++t_wp) == BAND)
- return aexpr(t_lex(*++t_wp)) && res;
- t_wp--;
- return res;
-}
-
-static arith_t nexpr(enum token n)
-{
- if (n == UNOT)
- return !nexpr(t_lex(*++t_wp));
- return primary(n);
-}
-
-static arith_t primary(enum token n)
-{
- arith_t res;
-
- if (n == EOI) {
- syntax(NULL, "argument expected");
- }
- if (n == LPAREN) {
- res = oexpr(t_lex(*++t_wp));
- 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));
- 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) {
- 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);
- }
- /* NOTREACHED */
- return 1;
-}
-
-static int filstat(char *nm, enum token mode)
-{
- struct stat s;
- unsigned int i;
-
- if (mode == FILSYM) {
-#ifdef S_IFLNK
- if (lstat(nm, &s) == 0) {
- i = S_IFLNK;
- goto filetype;
- }
-#endif
- return 0;
- }
-
- if (stat(nm, &s) != 0)
- return 0;
-
- switch (mode) {
- case FILRD:
- return test_eaccess(nm, R_OK) == 0;
- case FILWR:
- return test_eaccess(nm, W_OK) == 0;
- case FILEX:
- return test_eaccess(nm, X_OK) == 0;
- case FILEXIST:
- return 1;
- case FILREG:
- i = S_IFREG;
- goto filetype;
- case FILDIR:
- i = S_IFDIR;
- goto filetype;
- case FILCDEV:
- i = S_IFCHR;
- goto filetype;
- case FILBDEV:
- i = S_IFBLK;
- goto filetype;
- case FILFIFO:
-#ifdef S_IFIFO
- i = S_IFIFO;
- goto filetype;
-#else
- return 0;
-#endif
- case FILSOCK:
-#ifdef S_IFSOCK
- i = S_IFSOCK;
- goto filetype;
-#else
- return 0;
-#endif
- case FILSUID:
- i = S_ISUID;
- goto filebit;
- case FILSGID:
- i = S_ISGID;
- goto filebit;
- case FILSTCK:
- i = S_ISVTX;
- goto filebit;
- case FILGZ:
- return s.st_size > 0L;
- case FILUID:
- return s.st_uid == geteuid();
- case FILGID:
- return s.st_gid == getegid();
- default:
- return 1;
- }
-
- filetype:
- return ((s.st_mode & S_IFMT) == i);
-
- filebit:
- return ((s.st_mode & i) != 0);
-}
-
-static enum token t_lex(char *s)
-{
- struct t_op const *op = ops;
-
- if (s == 0) {
- t_wp_op = (struct t_op *) 0;
- return EOI;
- }
- while (op->op_text) {
- if (strcmp(s, op->op_text) == 0) {
- t_wp_op = op;
- return op->op_num;
- }
- op++;
- }
- t_wp_op = (struct t_op *) 0;
- return OPERAND;
-}
-
/* atoi with error detection */
-static arith_t getn(const char *s)
+//XXX: FIXME: duplicate of existing libbb function?
+static number_t getn(const char *s)
{
char *p;
-#ifdef CONFIG_FEATURE_TEST_64
+#if ENABLE_FEATURE_TEST_64
long long r;
#else
long r;
#endif
errno = 0;
-#ifdef CONFIG_FEATURE_TEST_64
+#if ENABLE_FEATURE_TEST_64
r = strtoll(s, &p, 10);
#else
r = strtol(s, &p, 10);
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;
}
+/* UNUSED
static int newerf(const char *f1, const char *f2)
{
struct stat b1, b2;
stat(f2, &b2) == 0 &&
b1.st_dev == b2.st_dev && b1.st_ino == b2.st_ino);
}
+*/
+
+
+static enum token check_operator(const char *s)
+{
+ static const struct operator_t no_op = {
+ .op_num = -1,
+ .op_type = -1
+ };
+ int n;
+
+ last_operator = &no_op;
+ if (s == NULL)
+ return EOI;
+ n = index_in_strings(ops_texts, s);
+ if (n < 0)
+ return OPERAND;
+ last_operator = &ops_table[n];
+ return ops_table[n].op_num;
+}
+
+
+static int binop(void)
+{
+ const char *opnd1, *opnd2;
+ const struct operator_t *op;
+ number_t val1, val2;
+
+ opnd1 = *args;
+ check_operator(*++args);
+ op = last_operator;
+
+ opnd2 = *++args;
+ if (opnd2 == NULL)
+ syntax(args[-1], "argument expected");
+
+ if (is_int_op(op->op_num)) {
+ val1 = getn(opnd1);
+ val2 = getn(opnd2);
+ if (op->op_num == INTEQ)
+ return val1 == val2;
+ if (op->op_num == INTNE)
+ return val1 != val2;
+ if (op->op_num == INTGE)
+ return val1 >= val2;
+ if (op->op_num == INTGT)
+ return val1 > val2;
+ if (op->op_num == INTLE)
+ return val1 <= val2;
+ /*if (op->op_num == INTLT)*/
+ return val1 < val2;
+ }
+ if (is_str_op(op->op_num)) {
+ val1 = strcmp(opnd1, opnd2);
+ if (op->op_num == STREQ)
+ return val1 == 0;
+ if (op->op_num == STRNE)
+ return val1 != 0;
+ if (op->op_num == STRLT)
+ return val1 < 0;
+ /*if (op->op_num == STRGT)*/
+ return val1 > 0;
+ }
+ /* We are sure that these three are by now the only binops we didn't check
+ * yet, so we do not check if the class is correct:
+ */
+/* if (is_file_op(op->op_num)) */
+ {
+ struct stat b1, b2;
+
+ if (stat(opnd1, &b1) || stat(opnd2, &b2))
+ return 0; /* false, since at least one stat failed */
+ if (op->op_num == FILNT)
+ return b1.st_mtime > b2.st_mtime;
+ if (op->op_num == FILOT)
+ return b1.st_mtime < b2.st_mtime;
+ /*if (op->op_num == FILEQ)*/
+ return b1.st_dev == b2.st_dev && b1.st_ino == b2.st_ino;
+ }
+ /*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);
+}
+
+
+/* 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:
+// possible code duplication ingroup() and is_a_group_member()
+static int is_a_group_member(gid_t gid)
+{
+ int i;
+
+ /* Short-circuit if possible, maybe saving a call to getgroups(). */
+ if (gid == getgid() || gid == getegid())
+ return 1;
+
+ if (ngroups == 0)
+ initialize_group_array();
+
+ /* Search through the list looking for GID. */
+ for (i = 0; i < ngroups; i++)
+ if (gid == group_array[i])
+ return 1;
+
+ return 0;
+}
+
/* 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
unsigned int euid = geteuid();
if (stat(path, &st) < 0)
- return (-1);
+ return -1;
if (euid == 0) {
/* Root can read or write any file. */
if (mode != X_OK)
- return (0);
+ return 0;
/* Root can execute any file that has any one of the execute
- bits set. */
+ * bits set. */
if (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))
- return (0);
+ return 0;
}
if (st.st_uid == euid) /* owner */
mode <<= 3;
if (st.st_mode & mode)
- return (0);
+ return 0;
- return (-1);
+ return -1;
}
-static void initialize_group_array(void)
+
+static int filstat(char *nm, enum token mode)
{
- ngroups = getgroups(0, NULL);
- if (ngroups > 0) {
- group_array = xmalloc(ngroups * sizeof(gid_t));
- getgroups(ngroups, group_array);
+ struct stat s;
+ unsigned i = i; /* gcc 3.x thinks it can be used uninitialized */
+
+ if (mode == FILSYM) {
+#ifdef S_IFLNK
+ if (lstat(nm, &s) == 0) {
+ i = S_IFLNK;
+ goto filetype;
+ }
+#endif
+ return 0;
}
+
+ if (stat(nm, &s) != 0)
+ return 0;
+ if (mode == FILEXIST)
+ return 1;
+ if (is_file_access(mode)) {
+ if (mode == FILRD)
+ i = R_OK;
+ if (mode == FILWR)
+ i = W_OK;
+ if (mode == FILEX)
+ i = X_OK;
+ return test_eaccess(nm, i) == 0;
+ }
+ if (is_file_type(mode)) {
+ if (mode == FILREG)
+ i = S_IFREG;
+ if (mode == FILDIR)
+ i = S_IFDIR;
+ if (mode == FILCDEV)
+ i = S_IFCHR;
+ if (mode == FILBDEV)
+ i = S_IFBLK;
+ if (mode == FILFIFO) {
+#ifdef S_IFIFO
+ i = S_IFIFO;
+#else
+ return 0;
+#endif
+ }
+ if (mode == FILSOCK) {
+#ifdef S_IFSOCK
+ i = S_IFSOCK;
+#else
+ return 0;
+#endif
+ }
+ filetype:
+ return ((s.st_mode & S_IFMT) == i);
+ }
+ if (is_file_bit(mode)) {
+ if (mode == FILSUID)
+ i = S_ISUID;
+ if (mode == FILSGID)
+ i = S_ISGID;
+ if (mode == FILSTCK)
+ i = S_ISVTX;
+ return ((s.st_mode & i) != 0);
+ }
+ if (mode == FILGZ)
+ return s.st_size > 0L;
+ if (mode == FILUID)
+ return s.st_uid == geteuid();
+ if (mode == FILGID)
+ return s.st_gid == getegid();
+ return 1; /* NOTREACHED */
}
-/* Return non-zero if GID is one that we have in our groups list. */
-static int is_a_group_member(gid_t gid)
+
+static number_t nexpr(enum token n)
{
- int i;
+ number_t res;
+
+ nest_msg(">nexpr(%s)\n", TOKSTR[n]);
+ if (n == UNOT) {
+ 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;
+ }
+ res = primary(n);
+ unnest_msg("<nexpr:%lld\n", res);
+ return res;
+}
- /* Short-circuit if possible, maybe saving a call to getgroups(). */
- if (gid == getgid() || gid == getegid())
- return (1);
- if (ngroups == 0)
- initialize_group_array();
+static number_t aexpr(enum token n)
+{
+ number_t res;
- /* Search through the list looking for GID. */
- for (i = 0; i < ngroups; i++)
- if (gid == group_array[i])
- return (1);
+ nest_msg(">aexpr(%s)\n", TOKSTR[n]);
+ res = nexpr(n);
+ 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(%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(%p)\n", res, args[0], &args[0]);
+ return res;
+}
- return (0);
+
+static number_t oexpr(enum token n)
+{
+ number_t res;
+
+ nest_msg(">oexpr(%s)\n", TOKSTR[n]);
+ res = aexpr(n);
+ 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(%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(%p)\n", res, args[0], &args[0]);
+ return res;
}
-/* applet entry point */
+static number_t primary(enum token n)
+{
+#if TEST_DEBUG
+ number_t res = res; /* for compiler */
+#else
+ number_t res;
+#endif
+ const struct operator_t *args0_op;
+
+ nest_msg(">primary(%s)\n", TOKSTR[n]);
+ if (n == EOI) {
+ syntax(NULL, "argument expected");
+ }
+ if (n == LPAREN) {
+ res = oexpr(check_operator(*++args));
+ if (check_operator(*++args) != RPAREN)
+ syntax(NULL, "closing paren expected");
+ unnest_msg("<primary:%lld\n", res);
+ return res;
+ }
+
+ /* coreutils 6.9 checks "is args[1] binop and args[2] exist?" first,
+ * do the same */
+ args0_op = last_operator;
+ /* last_operator = operator at args[1] */
+ if (check_operator(args[1]) != EOI) { /* if args[1] != NULL */
+ if (args[2]) {
+ // coreutils also does this:
+ // if (args[3] && args[0]="-l" && args[2] is BINOP)
+ // return binop(1 /* prepended by -l */);
+ if (last_operator->op_type == BINOP)
+ unnest_msg_and_return(binop(), "<primary: binop:%lld\n");
+ }
+ }
+ /* check "is args[0] unop?" second */
+ if (args0_op->op_type == UNOP) {
+ /* unary expression */
+ if (args[1] == NULL)
+// syntax(args0_op->op_text, "argument expected");
+ goto check_emptiness;
+ args++;
+ if (n == STREZ)
+ unnest_msg_and_return(args[0][0] == '\0', "<primary:%lld\n");
+ if (n == STRNZ)
+ unnest_msg_and_return(args[0][0] != '\0', "<primary:%lld\n");
+ if (n == FILTT)
+ unnest_msg_and_return(isatty(getn(*args)), "<primary: isatty(%s)%lld\n", *args);
+ unnest_msg_and_return(filstat(*args, n), "<primary: filstat(%s):%lld\n", *args);
+ }
+
+ /*check_operator(args[1]); - already done */
+ if (last_operator->op_type == BINOP) {
+ /* args[2] is known to be NULL, isn't it bound to fail? */
+ unnest_msg_and_return(binop(), "<primary:%lld\n");
+ }
+ check_emptiness:
+ unnest_msg_and_return(args[0][0] != '\0', "<primary:%lld\n");
+}
+
int test_main(int argc, char **argv)
{
- exit(bb_test(argc, argv));
-}
+ int res;
+ const char *arg0;
+// bool negate = 0;
+
+ arg0 = bb_basename(argv[0]);
+ if (arg0[0] == '[') {
+ --argc;
+ if (!arg0[1]) { /* "[" ? */
+ if (NOT_LONE_CHAR(argv[argc], ']')) {
+ bb_error_msg("missing ]");
+ return 2;
+ }
+ } else { /* assuming "[[" */
+ if (strcmp(argv[argc], "]]") != 0) {
+ bb_error_msg("missing ]]");
+ return 2;
+ }
+ }
+ argv[argc] = NULL;
+ }
+
+ /* We must do DEINIT_S() prior to returning */
+ INIT_S();
+
+ res = setjmp(leaving);
+ if (res)
+ goto ret;
+
+ /* resetting ngroups is probably unnecessary. it will
+ * force a new call to getgroups(), which prevents using
+ * group data fetched during a previous call. but the
+ * only way the group data could be stale is if there's
+ * been an intervening call to setgroups(), and this
+ * isn't likely in the case of a shell. paranoia
+ * prevails...
+ */
+ /*ngroups = 0; - done by INIT_S() */
+
+ //argc--;
+ 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;
+ res = (binop() == 0);
+ goto ret;
+ }
+ }
+ /* Some complex expression. Undo '!' removal */
+ if (negate) {
+ negate = 0;
+ //argc++;
+ argv--;
+ }
+#endif
+ args = argv;
+ res = !oexpr(check_operator(*args));
+
+ if (*args != NULL && *++args != NULL) {
+ /* 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 / platform / upstream / busybox.git / blobdiff