mirror of
https://github.com/sheumann/hush.git
synced 2024-08-18 21:29:23 +00:00
890 lines
20 KiB
C
890 lines
20 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* test implementation for busybox
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*
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* Copyright (c) by a whole pile of folks:
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*
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* test(1); version 7-like -- author Erik Baalbergen
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* modified by Eric Gisin to be used as built-in.
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* modified by Arnold Robbins to add SVR3 compatibility
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* (-x -c -b -p -u -g -k) plus Korn's -L -nt -ot -ef and new -S (socket).
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* modified by J.T. Conklin for NetBSD.
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* modified by Herbert Xu to be used as built-in in ash.
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* modified by Erik Andersen <andersen@codepoet.org> to be used
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* in busybox.
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* modified by Bernhard Reutner-Fischer to be useable (i.e. a bit less bloaty).
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*
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* Original copyright notice states:
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* "This program is in the Public Domain."
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*/
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//kbuild:lib-$(CONFIG_TEST) += test.o test_ptr_hack.o
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//kbuild:lib-$(CONFIG_ASH) += test.o test_ptr_hack.o
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//kbuild:lib-$(CONFIG_HUSH) += test.o test_ptr_hack.o
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//config:config TEST
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//config: bool "test"
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//config: default y
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//config: help
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//config: test is used to check file types and compare values,
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//config: returning an appropriate exit code. The bash shell
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//config: has test built in, ash can build it in optionally.
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//config:
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//config:config FEATURE_TEST_64
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//config: bool "Extend test to 64 bit"
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//config: default y
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//config: depends on TEST || ASH_BUILTIN_TEST || HUSH
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//config: help
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//config: Enable 64-bit support in test.
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#include "libbb.h"
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#include <setjmp.h>
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/* This is a NOFORK applet. Be very careful! */
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/* test_main() is called from shells, and we need to be extra careful here.
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* This is true regardless of PREFER_APPLETS and STANDALONE_SHELL
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* state. */
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/* test(1) accepts the following grammar:
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oexpr ::= aexpr | aexpr "-o" oexpr ;
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aexpr ::= nexpr | nexpr "-a" aexpr ;
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nexpr ::= primary | "!" primary
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primary ::= unary-operator operand
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| operand binary-operator operand
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| operand
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| "(" oexpr ")"
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;
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unary-operator ::= "-r"|"-w"|"-x"|"-f"|"-d"|"-c"|"-b"|"-p"|
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"-u"|"-g"|"-k"|"-s"|"-t"|"-z"|"-n"|"-o"|"-O"|"-G"|"-L"|"-S";
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binary-operator ::= "="|"=="|"!="|"-eq"|"-ne"|"-ge"|"-gt"|"-le"|"-lt"|
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"-nt"|"-ot"|"-ef";
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operand ::= <any legal UNIX file name>
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*/
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/* TODO: handle [[ expr ]] bashism bash-compatibly.
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* [[ ]] is meant to be a "better [ ]", with less weird syntax
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* and without the risk of variables and quoted strings misinterpreted
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* as operators.
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* This will require support from shells - we need to know quote status
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* of each parameter (see below).
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*
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* Word splitting and pathname expansion should NOT be performed:
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* # a="a b"; [[ $a = "a b" ]] && echo YES
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* YES
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* # [[ /bin/m* ]] && echo YES
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* YES
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*
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* =~ should do regexp match
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* = and == should do pattern match against right side:
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* # [[ *a* == bab ]] && echo YES
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* # [[ bab == *a* ]] && echo YES
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* YES
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* != does the negated == (i.e., also with pattern matching).
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* Pattern matching is quotation-sensitive:
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* # [[ bab == "b"a* ]] && echo YES
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* YES
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* # [[ bab == b"a*" ]] && echo YES
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*
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* Conditional operators such as -f must be unquoted literals to be recognized:
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* # [[ -e /bin ]] && echo YES
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* YES
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* # [[ '-e' /bin ]] && echo YES
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* bash: conditional binary operator expected...
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* # A='-e'; [[ $A /bin ]] && echo YES
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* bash: conditional binary operator expected...
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*
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* || and && should work as -o and -a work in [ ]
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* -a and -o aren't recognized (&& and || are to be used instead)
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* ( and ) do not need to be quoted unlike in [ ]:
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* # [[ ( abc ) && '' ]] && echo YES
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* # [[ ( abc ) || '' ]] && echo YES
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* YES
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* # [[ ( abc ) -o '' ]] && echo YES
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* bash: syntax error in conditional expression...
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*
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* Apart from the above, [[ expr ]] should work as [ expr ]
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*/
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#define TEST_DEBUG 0
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enum token {
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EOI,
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FILRD, /* file access */
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FILWR,
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FILEX,
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FILEXIST,
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FILREG, /* file type */
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FILDIR,
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FILCDEV,
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FILBDEV,
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FILFIFO,
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FILSOCK,
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FILSYM,
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FILGZ,
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FILTT,
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FILSUID, /* file bit */
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FILSGID,
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FILSTCK,
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FILNT, /* file ops */
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FILOT,
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FILEQ,
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FILUID,
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FILGID,
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STREZ, /* str ops */
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STRNZ,
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STREQ,
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STRNE,
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STRLT,
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STRGT,
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INTEQ, /* int ops */
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INTNE,
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INTGE,
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INTGT,
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INTLE,
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INTLT,
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UNOT,
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BAND,
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BOR,
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LPAREN,
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RPAREN,
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OPERAND
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};
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#define is_int_op(a) (((unsigned char)((a) - INTEQ)) <= 5)
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#define is_str_op(a) (((unsigned char)((a) - STREZ)) <= 5)
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#define is_file_op(a) (((unsigned char)((a) - FILNT)) <= 2)
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#define is_file_access(a) (((unsigned char)((a) - FILRD)) <= 2)
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#define is_file_type(a) (((unsigned char)((a) - FILREG)) <= 5)
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#define is_file_bit(a) (((unsigned char)((a) - FILSUID)) <= 2)
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#if TEST_DEBUG
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int depth;
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#define nest_msg(...) do { \
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depth++; \
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fprintf(stderr, "%*s", depth*2, ""); \
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fprintf(stderr, __VA_ARGS__); \
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} while (0)
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#define unnest_msg(...) do { \
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fprintf(stderr, "%*s", depth*2, ""); \
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fprintf(stderr, __VA_ARGS__); \
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depth--; \
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} while (0)
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#define dbg_msg(...) do { \
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fprintf(stderr, "%*s", depth*2, ""); \
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fprintf(stderr, __VA_ARGS__); \
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} while (0)
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#define unnest_msg_and_return(expr, ...) do { \
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number_t __res = (expr); \
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fprintf(stderr, "%*s", depth*2, ""); \
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fprintf(stderr, __VA_ARGS__, res); \
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depth--; \
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return __res; \
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} while (0)
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static const char *const TOKSTR[] = {
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"EOI",
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"FILRD",
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"FILWR",
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"FILEX",
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"FILEXIST",
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"FILREG",
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"FILDIR",
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"FILCDEV",
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"FILBDEV",
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"FILFIFO",
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"FILSOCK",
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"FILSYM",
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"FILGZ",
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"FILTT",
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"FILSUID",
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"FILSGID",
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"FILSTCK",
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"FILNT",
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"FILOT",
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"FILEQ",
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"FILUID",
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"FILGID",
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"STREZ",
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"STRNZ",
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"STREQ",
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"STRNE",
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"STRLT",
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"STRGT",
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"INTEQ",
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"INTNE",
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"INTGE",
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"INTGT",
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"INTLE",
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"INTLT",
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"UNOT",
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"BAND",
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"BOR",
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"LPAREN",
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"RPAREN",
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"OPERAND"
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};
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#else
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#define nest_msg(...) ((void)0)
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#define unnest_msg(...) ((void)0)
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#define dbg_msg(...) ((void)0)
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#define unnest_msg_and_return(expr, ...) return expr
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#endif
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enum {
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UNOP,
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BINOP,
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BUNOP,
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BBINOP,
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PAREN
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};
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struct operator_t {
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unsigned char op_num, op_type;
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};
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static const struct operator_t ops_table[] = {
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{ /* "-r" */ FILRD , UNOP },
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{ /* "-w" */ FILWR , UNOP },
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{ /* "-x" */ FILEX , UNOP },
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{ /* "-e" */ FILEXIST, UNOP },
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{ /* "-f" */ FILREG , UNOP },
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{ /* "-d" */ FILDIR , UNOP },
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{ /* "-c" */ FILCDEV , UNOP },
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{ /* "-b" */ FILBDEV , UNOP },
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{ /* "-p" */ FILFIFO , UNOP },
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{ /* "-u" */ FILSUID , UNOP },
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{ /* "-g" */ FILSGID , UNOP },
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{ /* "-k" */ FILSTCK , UNOP },
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{ /* "-s" */ FILGZ , UNOP },
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{ /* "-t" */ FILTT , UNOP },
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{ /* "-z" */ STREZ , UNOP },
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{ /* "-n" */ STRNZ , UNOP },
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{ /* "-h" */ FILSYM , UNOP }, /* for backwards compat */
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{ /* "-O" */ FILUID , UNOP },
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{ /* "-G" */ FILGID , UNOP },
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{ /* "-L" */ FILSYM , UNOP },
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{ /* "-S" */ FILSOCK , UNOP },
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{ /* "=" */ STREQ , BINOP },
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{ /* "==" */ STREQ , BINOP },
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{ /* "!=" */ STRNE , BINOP },
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{ /* "<" */ STRLT , BINOP },
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{ /* ">" */ STRGT , BINOP },
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{ /* "-eq"*/ INTEQ , BINOP },
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{ /* "-ne"*/ INTNE , BINOP },
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{ /* "-ge"*/ INTGE , BINOP },
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{ /* "-gt"*/ INTGT , BINOP },
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{ /* "-le"*/ INTLE , BINOP },
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{ /* "-lt"*/ INTLT , BINOP },
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{ /* "-nt"*/ FILNT , BINOP },
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{ /* "-ot"*/ FILOT , BINOP },
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{ /* "-ef"*/ FILEQ , BINOP },
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{ /* "!" */ UNOT , BUNOP },
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{ /* "-a" */ BAND , BBINOP },
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{ /* "-o" */ BOR , BBINOP },
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{ /* "(" */ LPAREN , PAREN },
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{ /* ")" */ RPAREN , PAREN },
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};
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/* Please keep these two tables in sync */
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static const char ops_texts[] ALIGN1 =
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"-r" "\0"
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"-w" "\0"
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"-x" "\0"
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"-e" "\0"
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"-f" "\0"
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"-d" "\0"
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"-c" "\0"
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"-b" "\0"
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"-p" "\0"
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"-u" "\0"
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"-g" "\0"
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"-k" "\0"
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"-s" "\0"
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"-t" "\0"
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"-z" "\0"
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"-n" "\0"
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"-h" "\0"
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"-O" "\0"
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"-G" "\0"
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"-L" "\0"
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"-S" "\0"
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"=" "\0"
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"==" "\0"
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"!=" "\0"
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"<" "\0"
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">" "\0"
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"-eq" "\0"
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"-ne" "\0"
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"-ge" "\0"
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"-gt" "\0"
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"-le" "\0"
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"-lt" "\0"
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"-nt" "\0"
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"-ot" "\0"
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"-ef" "\0"
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"!" "\0"
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"-a" "\0"
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"-o" "\0"
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"(" "\0"
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")" "\0"
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;
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#if ENABLE_FEATURE_TEST_64
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typedef int64_t number_t;
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#else
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typedef int number_t;
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#endif
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/* We try to minimize both static and stack usage. */
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struct test_statics {
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char **args;
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/* set only by check_operator(), either to bogus struct
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* or points to matching operator_t struct. Never NULL. */
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const struct operator_t *last_operator;
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gid_t *group_array;
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int ngroups;
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jmp_buf leaving;
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};
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/* See test_ptr_hack.c */
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extern struct test_statics *const test_ptr_to_statics;
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#define S (*test_ptr_to_statics)
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#define args (S.args )
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#define last_operator (S.last_operator)
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#define group_array (S.group_array )
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#define ngroups (S.ngroups )
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#define leaving (S.leaving )
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#define INIT_S() do { \
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(*(struct test_statics**)&test_ptr_to_statics) = xzalloc(sizeof(S)); \
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barrier(); \
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} while (0)
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#define DEINIT_S() do { \
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free(test_ptr_to_statics); \
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} while (0)
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static number_t primary(enum token n);
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static void syntax(const char *op, const char *msg) NORETURN;
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static void syntax(const char *op, const char *msg)
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{
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if (op && *op) {
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bb_error_msg("%s: %s", op, msg);
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} else {
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bb_error_msg("%s: %s"+4, msg);
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}
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longjmp(leaving, 2);
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}
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/* atoi with error detection */
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//XXX: FIXME: duplicate of existing libbb function?
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static number_t getn(const char *s)
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{
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char *p;
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#if ENABLE_FEATURE_TEST_64
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long long r;
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#else
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long r;
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#endif
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errno = 0;
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#if ENABLE_FEATURE_TEST_64
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r = strtoll(s, &p, 10);
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#else
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r = strtol(s, &p, 10);
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#endif
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if (errno != 0)
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syntax(s, "out of range");
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if (p == s || *(skip_whitespace(p)) != '\0')
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syntax(s, "bad number");
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return r;
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}
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/* UNUSED
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static int newerf(const char *f1, const char *f2)
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{
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struct stat b1, b2;
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return (stat(f1, &b1) == 0 &&
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stat(f2, &b2) == 0 && b1.st_mtime > b2.st_mtime);
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}
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static int olderf(const char *f1, const char *f2)
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{
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struct stat b1, b2;
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return (stat(f1, &b1) == 0 &&
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stat(f2, &b2) == 0 && b1.st_mtime < b2.st_mtime);
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}
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static int equalf(const char *f1, const char *f2)
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{
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struct stat b1, b2;
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return (stat(f1, &b1) == 0 &&
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stat(f2, &b2) == 0 &&
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b1.st_dev == b2.st_dev && b1.st_ino == b2.st_ino);
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}
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*/
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static enum token check_operator(const char *s)
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{
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static const struct operator_t no_op = {
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.op_num = -1,
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.op_type = -1
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};
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int n;
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last_operator = &no_op;
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if (s == NULL)
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return EOI;
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n = index_in_strings(ops_texts, s);
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if (n < 0)
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return OPERAND;
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last_operator = &ops_table[n];
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return ops_table[n].op_num;
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}
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static int binop(void)
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{
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const char *opnd1, *opnd2;
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const struct operator_t *op;
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number_t val1, val2;
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opnd1 = *args;
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check_operator(*++args);
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op = last_operator;
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opnd2 = *++args;
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if (opnd2 == NULL)
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syntax(args[-1], "argument expected");
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if (is_int_op(op->op_num)) {
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val1 = getn(opnd1);
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val2 = getn(opnd2);
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if (op->op_num == INTEQ)
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return val1 == val2;
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if (op->op_num == INTNE)
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return val1 != val2;
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if (op->op_num == INTGE)
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return val1 >= val2;
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if (op->op_num == INTGT)
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return val1 > val2;
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if (op->op_num == INTLE)
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return val1 <= val2;
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/*if (op->op_num == INTLT)*/
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return val1 < val2;
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}
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if (is_str_op(op->op_num)) {
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val1 = strcmp(opnd1, opnd2);
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if (op->op_num == STREQ)
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return val1 == 0;
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if (op->op_num == STRNE)
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return val1 != 0;
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if (op->op_num == STRLT)
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return val1 < 0;
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/*if (op->op_num == STRGT)*/
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return val1 > 0;
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}
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/* We are sure that these three are by now the only binops we didn't check
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* yet, so we do not check if the class is correct:
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*/
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/* if (is_file_op(op->op_num)) */
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{
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struct stat b1, b2;
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if (stat(opnd1, &b1) || stat(opnd2, &b2))
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return 0; /* false, since at least one stat failed */
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if (op->op_num == FILNT)
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return b1.st_mtime > b2.st_mtime;
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if (op->op_num == FILOT)
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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
|
|
executable. */
|
|
static int test_eaccess(char *path, 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))
|
|
return 0;
|
|
}
|
|
|
|
if (st.st_uid == euid) /* owner */
|
|
mode <<= 6;
|
|
else if (is_a_group_member(st.st_gid))
|
|
mode <<= 3;
|
|
|
|
if (st.st_mode & mode)
|
|
return 0;
|
|
|
|
return -1;
|
|
}
|
|
|
|
|
|
static int filstat(char *nm, enum token mode)
|
|
{
|
|
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 */
|
|
}
|
|
|
|
|
|
static number_t nexpr(enum token n)
|
|
{
|
|
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 */
|
|
unnest_msg("<nexpr:1 (!EOI)\n");
|
|
return 1;
|
|
}
|
|
res = !nexpr(n);
|
|
unnest_msg("<nexpr:%lld\n", res);
|
|
return res;
|
|
}
|
|
res = primary(n);
|
|
unnest_msg("<nexpr:%lld\n", res);
|
|
return res;
|
|
}
|
|
|
|
|
|
static number_t aexpr(enum token n)
|
|
{
|
|
number_t res;
|
|
|
|
nest_msg(">aexpr(%s)\n", TOKSTR[n]);
|
|
res = nexpr(n);
|
|
dbg_msg("aexpr: nexpr:%lld, next args:%s\n", res, args[1]);
|
|
if (check_operator(*++args) == BAND) {
|
|
dbg_msg("aexpr: arg is AND, next args:%s\n", 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]);
|
|
return res;
|
|
}
|
|
|
|
|
|
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\n", res, args[1]);
|
|
if (check_operator(*++args) == BOR) {
|
|
dbg_msg("oexpr: next arg is OR, next args:%s\n", 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]);
|
|
return res;
|
|
}
|
|
|
|
|
|
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)
|
|
{
|
|
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) {
|
|
/* TODO: example when this happens? */
|
|
bb_error_msg("%s: unknown operand", *args);
|
|
res = 2;
|
|
}
|
|
ret:
|
|
DEINIT_S();
|
|
// return negate ? !res : res;
|
|
return res;
|
|
}
|