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authorDenis Vlasenko <vda.linux@googlemail.com>2009-04-04 23:15:14 +0000
committerDenis Vlasenko <vda.linux@googlemail.com>2009-04-04 23:15:14 +0000
commit609f2ab4345e173ea944db774131e3615b3176a8 (patch)
treef7a99412acecb9868966335fdb222bba8474c2fd /shell
parent9aa7d6fdc5554480b9cb4fc740ce3f1d2b734555 (diff)
downloadbusybox-609f2ab4345e173ea944db774131e3615b3176a8.tar.gz
hush: enable NOMMU re-execution logic. Some testsuite entries
fail on NOMMU. Before it was much worse. No regressions on MMU, size: function old new delta handle_dollar 626 632 +6 run_list 2018 2022 +4 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/0 up/down: 10/0) Total: 10 bytes
Diffstat (limited to 'shell')
-rw-r--r--shell/hush.c113
1 files changed, 91 insertions, 22 deletions
diff --git a/shell/hush.c b/shell/hush.c
index ac3480578..0313cfd78 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -2329,6 +2329,16 @@ static void pseudo_exec_argv(nommu_save_t *nommu_save,
_exit(EXIT_FAILURE);
}
+static void re_execute_shell(const char *s) NORETURN;
+static void re_execute_shell(const char *s)
+{
+//TODO: pass non-exported variables, traps, and functions
+ debug_printf_exec("re_execute_shell pid:%d cmd:'%s'", getpid(), s);
+ execl(bb_busybox_exec_path, "hush", "-c", s, NULL);
+//TODO: fallback for init=/bin/hush?
+ _exit(127);
+}
+
static int run_list(struct pipe *pi);
/* Called after [v]fork() in run_pipe()
@@ -2360,8 +2370,7 @@ static void pseudo_exec(nommu_save_t *nommu_save,
* since this process is about to exit */
_exit(rcode);
#else
- bb_error_msg_and_die("NOMMU TODO: re-exec '%s'",
- command->group_as_string);
+ re_execute_shell(command->group_as_string);
#endif
}
@@ -3831,9 +3840,7 @@ static FILE *generate_stream_from_string(const char *s)
* huge=`cat TESTFILE` # was blocking here forever
* echo OK
*/
-//TODO: pass non-exported variables, traps, and functions
- execl(bb_busybox_exec_path, "hush", "-c", s, NULL);
- _exit(127);
+ re_execute_shell(s);
#endif
}
@@ -4071,7 +4078,13 @@ static void add_till_closing_paren(o_string *dest, struct in_str *input, bool db
#endif /* ENABLE_HUSH_TICK || ENABLE_SH_MATH_SUPPORT */
/* Return code: 0 for OK, 1 for syntax error */
-static int handle_dollar(o_string *dest, struct in_str *input)
+#if BB_MMU
+#define handle_dollar(ctx, dest, input) \
+ handle_dollar(dest, input)
+#endif
+static int handle_dollar(struct parse_context *ctx,
+ o_string *dest,
+ struct in_str *input)
{
int expansion;
int ch = i_peek(input); /* first character after the $ */
@@ -4079,7 +4092,10 @@ static int handle_dollar(o_string *dest, struct in_str *input)
debug_printf_parse("handle_dollar entered: ch='%c'\n", ch);
if (isalpha(ch)) {
- i_getch(input);
+ ch = i_getch(input);
+#if !BB_MMU
+ o_addchr(&ctx->as_string, ch);
+#endif
make_var:
o_addchr(dest, SPECIAL_VAR_SYMBOL);
while (1) {
@@ -4089,12 +4105,18 @@ static int handle_dollar(o_string *dest, struct in_str *input)
ch = i_peek(input);
if (!isalnum(ch) && ch != '_')
break;
- i_getch(input);
+ ch = i_getch(input);
+#if !BB_MMU
+ o_addchr(&ctx->as_string, ch);
+#endif
}
o_addchr(dest, SPECIAL_VAR_SYMBOL);
} else if (isdigit(ch)) {
make_one_char_var:
- i_getch(input);
+ ch = i_getch(input);
+#if !BB_MMU
+ o_addchr(&ctx->as_string, ch);
+#endif
o_addchr(dest, SPECIAL_VAR_SYMBOL);
debug_printf_parse(": '%c'\n", ch);
o_addchr(dest, ch | quote_mask);
@@ -4111,13 +4133,19 @@ static int handle_dollar(o_string *dest, struct in_str *input)
bool first_char, all_digits;
o_addchr(dest, SPECIAL_VAR_SYMBOL);
- i_getch(input);
+ ch = i_getch(input);
+#if !BB_MMU
+ o_addchr(&ctx->as_string, ch);
+#endif
/* XXX maybe someone will try to escape the '}' */
expansion = 0;
first_char = true;
all_digits = false;
while (1) {
ch = i_getch(input);
+#if !BB_MMU
+ o_addchr(&ctx->as_string, ch);
+#endif
if (ch == '}')
break;
@@ -4183,10 +4211,16 @@ static int handle_dollar(o_string *dest, struct in_str *input)
break;
}
case '(': {
- i_getch(input);
+ ch = i_getch(input);
+#if !BB_MMU
+ o_addchr(&ctx->as_string, ch);
+#endif
#if ENABLE_SH_MATH_SUPPORT
if (i_peek(input) == '(') {
- i_getch(input);
+ ch = i_getch(input);
+#if !BB_MMU
+ o_addchr(&ctx->as_string, ch);
+#endif
o_addchr(dest, SPECIAL_VAR_SYMBOL);
o_addchr(dest, /*quote_mask |*/ '+');
add_till_closing_paren(dest, input, true);
@@ -4205,7 +4239,10 @@ static int handle_dollar(o_string *dest, struct in_str *input)
break;
}
case '_':
- i_getch(input);
+ ch = i_getch(input);
+#if !BB_MMU
+ o_addchr(&ctx->as_string, ch);
+#endif
ch = i_peek(input);
if (isalnum(ch)) { /* it's $_name or $_123 */
ch = '_';
@@ -4281,7 +4318,7 @@ static int parse_stream_dquoted(struct parse_context *ctx,
goto again;
}
if (ch == '$') {
- if (handle_dollar(dest, input) != 0) {
+ if (handle_dollar(ctx, dest, input) != 0) {
debug_printf_parse("parse_stream_dquoted return 1: "
"handle_dollar returned non-0\n");
return 1;
@@ -4477,7 +4514,12 @@ static struct pipe *parse_stream(char **pstring,
if (ch == EOF || ch == '\n')
break;
i_getch(input);
+ /* note: we do not add it to &ctx.as_string */
}
+#if !BB_MMU
+//TODO: go back one char?
+ o_addchr(&ctx.as_string, '\n');
+#endif
} else {
o_addQchr(&dest, ch);
}
@@ -4488,10 +4530,15 @@ static struct pipe *parse_stream(char **pstring,
goto parse_error;
}
o_addchr(&dest, '\\');
- o_addchr(&dest, i_getch(input));
+ ch = i_getch(input);
+ o_addchr(&dest, ch);
+#if !BB_MMU
+ o_addchr(&ctx.as_string, ch);
+#endif
break;
case '$':
- if (handle_dollar(&dest, input) != 0) {
+//NOMMU TODO!
+ if (handle_dollar(&ctx, &dest, input) != 0) {
debug_printf_parse("parse_stream parse error: "
"handle_dollar returned non-0\n");
goto parse_error;
@@ -4505,6 +4552,9 @@ static struct pipe *parse_stream(char **pstring,
syntax("unterminated '");
goto parse_error;
}
+#if !BB_MMU
+ o_addchr(&ctx.as_string, ch);
+#endif
if (ch == '\'')
break;
if (dest.o_assignment == NOT_ASSIGNMENT)
@@ -4538,7 +4588,10 @@ static struct pipe *parse_stream(char **pstring,
redir_style = REDIRECT_OVERWRITE;
if (next == '>') {
redir_style = REDIRECT_APPEND;
- i_getch(input);
+ ch = i_getch(input);
+#if !BB_MMU
+ o_addchr(&ctx.as_string, ch);
+#endif
}
#if 0
else if (next == '(') {
@@ -4556,10 +4609,16 @@ static struct pipe *parse_stream(char **pstring,
redir_style = REDIRECT_INPUT;
if (next == '<') {
redir_style = REDIRECT_HEREIS;
- i_getch(input);
+ ch = i_getch(input);
+#if !BB_MMU
+ o_addchr(&ctx.as_string, ch);
+#endif
} else if (next == '>') {
redir_style = REDIRECT_IO;
- i_getch(input);
+ ch = i_getch(input);
+#if !BB_MMU
+ o_addchr(&ctx.as_string, ch);
+#endif
}
#if 0
else if (next == '(') {
@@ -4584,7 +4643,10 @@ static struct pipe *parse_stream(char **pstring,
ch = i_peek(input);
if (ch != ';')
break;
- i_getch(input);
+ ch = i_getch(input);
+#if !BB_MMU
+ o_addchr(&ctx.as_string, ch);
+#endif
if (ctx.ctx_res_w == RES_CASEI) {
ctx.ctx_dsemicolon = 1;
ctx.ctx_res_w = RES_MATCH;
@@ -4602,7 +4664,10 @@ static struct pipe *parse_stream(char **pstring,
goto parse_error;
}
if (next == '&') {
- i_getch(input);
+ ch = i_getch(input);
+#if !BB_MMU
+ o_addchr(&ctx.as_string, ch);
+#endif
done_pipe(&ctx, PIPE_AND);
} else {
done_pipe(&ctx, PIPE_BG);
@@ -4617,7 +4682,10 @@ static struct pipe *parse_stream(char **pstring,
break; /* we are in case's "word | word)" */
#endif
if (next == '|') { /* || */
- i_getch(input);
+ ch = i_getch(input);
+#if !BB_MMU
+ o_addchr(&ctx.as_string, ch);
+#endif
done_pipe(&ctx, PIPE_OR);
} else {
/* we could pick up a file descriptor choice here
@@ -4647,6 +4715,7 @@ static struct pipe *parse_stream(char **pstring,
) {
bb_error_msg("seems like a function definition");
i_getch(input);
+//if !BB_MMU o_addchr(&ctx.as_string...
do {
//TODO: do it properly.
ch = i_getch(input);