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ash: fix . builtin

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Also, move [[ ]] comment to test.c and expand it

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2009-06-14 19:42:12 +02:00
parent 2441060beb
commit 82a6fb3ea6
6 changed files with 66 additions and 46 deletions
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46
coreutils/test.c
View File

@ -19,7 +19,6 @@
* Original copyright notice states:
* "This program is in the Public Domain."
*/
#include "libbb.h"
#include <setjmp.h>
@ -29,7 +28,6 @@
* This is true regardless of PREFER_APPLETS and STANDALONE_SHELL
* state. */
/* test(1) accepts the following grammar:
oexpr ::= aexpr | aexpr "-o" oexpr ;
aexpr ::= nexpr | nexpr "-a" aexpr ;
@ -47,6 +45,50 @@
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 {

42
shell/ash.c
View File

@ -2224,17 +2224,17 @@ listvars(int on, int off, char ***end)
/* ============ Path search helper
*
* The variable path (passed by reference) should be set to the start
* of the path before the first call; padvance will update
* this value as it proceeds. Successive calls to padvance will return
* of the path before the first call; path_advance will update
* this value as it proceeds. Successive calls to path_advance will return
* the possible path expansions in sequence. If an option (indicated by
* a percent sign) appears in the path entry then the global variable
* pathopt will be set to point to it; otherwise pathopt will be set to
* NULL.
*/
static const char *pathopt; /* set by padvance */
static const char *pathopt; /* set by path_advance */
static char *
padvance(const char **path, const char *name)
path_advance(const char **path, const char *name)
{
const char *p;
char *q;
@ -2538,7 +2538,7 @@ cdcmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
}
do {
c = *path;
p = padvance(&path, dest);
p = path_advance(&path, dest);
if (stat(p, &statb) >= 0 && S_ISDIR(statb.st_mode)) {
if (c && c != ':')
flags |= CD_PRINT;
@ -7159,7 +7159,7 @@ shellexec(char **argv, const char *path, int idx)
e = errno;
} else {
e = ENOENT;
while ((cmdname = padvance(&path, argv[0])) != NULL) {
while ((cmdname = path_advance(&path, argv[0])) != NULL) {
if (--idx < 0 && pathopt == NULL) {
tryexec(IF_FEATURE_SH_STANDALONE(-1,) cmdname, argv, envp);
if (errno != ENOENT && errno != ENOTDIR)
@ -7198,7 +7198,7 @@ printentry(struct tblentry *cmdp)
idx = cmdp->param.index;
path = pathval();
do {
name = padvance(&path, cmdp->cmdname);
name = path_advance(&path, cmdp->cmdname);
stunalloc(name);
} while (--idx >= 0);
out1fmt("%s%s\n", name, (cmdp->rehash ? "*" : nullstr));
@ -7570,7 +7570,7 @@ describe_command(char *command, int describe_command_verbose)
p = command;
} else {
do {
p = padvance(&path, command);
p = path_advance(&path, command);
stunalloc(p);
} while (--j >= 0);
}
@ -8727,23 +8727,6 @@ static int ulimitcmd(int, char **) FAST_FUNC;
#define BUILTIN_REG_ASSG "6"
#define BUILTIN_SPEC_REG_ASSG "7"
/* We do not handle [[ expr ]] bashism bash-compatibly,
* we make it a synonym of [ expr ].
* Basically, word splitting and pathname expansion should NOT be performed
* Examples:
* no word splitting: a="a b"; [[ $a = "a b" ]]; echo $? should print "0"
* no pathname expansion: [[ /bin/m* = "/bin/m*" ]]; echo $? should print "0"
* Additional operators:
* || and && should work as -o and -a
* =~ regexp match
* == should do _pattern match_ against right side. bash does this:
* # [[ *a* == bab ]] && echo YES
* # [[ bab == *a* ]] && echo YES
* YES
* != does the negated == (i.e., also with pattern matching)
* Apart from the above, [[ expr ]] should work as [ expr ]
*/
/* Stubs for calling non-FAST_FUNC's */
#if ENABLE_ASH_BUILTIN_ECHO
static int FAST_FUNC echocmd(int argc, char **argv) { return echo_main(argc, argv); }
@ -9718,7 +9701,7 @@ chkmail(void)
setstackmark(&smark);
mpath = mpathset() ? mpathval() : mailval();
for (mtp = mailtime; mtp < mailtime + MAXMBOXES; mtp++) {
p = padvance(&mpath, nullstr);
p = path_advance(&mpath, nullstr);
if (p == NULL)
break;
if (*p == '\0')
@ -11912,7 +11895,7 @@ find_dot_file(char *name)
goto try_cur_dir;
}
while ((fullname = padvance(&path, name)) != NULL) {
while ((fullname = path_advance(&path, name)) != NULL) {
try_cur_dir:
if ((stat(fullname, &statb) == 0) && S_ISREG(statb.st_mode)) {
/*
@ -11921,7 +11904,8 @@ find_dot_file(char *name)
*/
return fullname;
}
stunalloc(fullname);
if (fullname != name)
stunalloc(fullname);
}
/* not found in the PATH */
@ -12095,7 +12079,7 @@ find_command(char *name, struct cmdentry *entry, int act, const char *path)
e = ENOENT;
idx = -1;
loop:
while ((fullname = padvance(&path, name)) != NULL) {
while ((fullname = path_advance(&path, name)) != NULL) {
stunalloc(fullname);
/* NB: code below will still use fullname
* despite it being "unallocated" */

2
shell/ash_test/ash-misc/source1.right Normal file
View File

@ -0,0 +1,2 @@
Sourced ok
Done

5
shell/ash_test/ash-misc/source1.tests Executable file
View File

@ -0,0 +1,5 @@
echo "echo Sourced ok" >../sourced.sh
PATH="..:$PATH"
. sourced.sh
rm ../sourced.sh
echo Done

2
shell/ash_test/run-all
View File

@ -19,7 +19,7 @@ export THIS_SH
do_test()
{
test -d "$1" || return 0
echo do_test "$1"
# echo do_test "$1"
# $1 but with / replaced by # so that it can be used as filename part
noslash=`echo "$1" | sed 's:/:#:g'`
(

15
shell/hush.c
View File

@ -311,22 +311,9 @@ struct command {
#if ENABLE_HUSH_BASH_COMPAT
# define CMD_SINGLEWORD_NOGLOB 2
#endif
// Basically, word splitting and pathname expansion should NOT be performed
// Examples:
// no word splitting: a="a b"; [[ $a = "a b" ]]; echo $? should print "0"
// no pathname expansion: [[ /bin/m* = "/bin/m*" ]]; echo $? should print "0"
// Additional operators:
// || and && should work as -o and -a
// =~ regexp match
// == should do _pattern match_ against right side. bash does this:
// # [[ *a* == bab ]] && echo YES
// # [[ bab == *a* ]] && echo YES
// YES
// != does the negated == (i.e., also with pattern matching)
// Apart from the above, [[ expr ]] should work as [ expr ]
/* used for "export noglob=* glob* a=`echo a b`" */
/*#define CMD_SINGLEWORD_NOGLOB_COND 3 */
//#define CMD_SINGLEWORD_NOGLOB_COND 3
// It is hard to implement correctly, it adds significant amounts of tricky code,
// and all this is only useful for really obscure export statements
// almost nobody would use anyway. #ifdef CMD_SINGLEWORD_NOGLOB_COND