* Original copyright notice states:
* "This program is in the Public Domain."
*/
-
#include "libbb.h"
#include <setjmp.h>
* 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 ;
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 {
/* ============ 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;
}
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;
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)
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));
p = command;
} else {
do {
- p = padvance(&path, command);
+ p = path_advance(&path, command);
stunalloc(p);
} while (--j >= 0);
}
#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); }
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')
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)) {
/*
*/
return fullname;
}
- stunalloc(fullname);
+ if (fullname != name)
+ stunalloc(fullname);
}
/* not found in the 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" */
#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
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