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authorDenis Vlasenko2009-04-03 03:45:05 +0000
committerDenis Vlasenko2009-04-03 03:45:05 +0000
commit240c255d8b349f06c94cb3afc24c85b6c38b6608 (patch)
tree269ee41ce9cbd353764531d0086cd0925d8fbf9d /shell
parent3718168b87a5bf5009b90b1e1253bec2c7ce9edf (diff)
downloadbusybox-240c255d8b349f06c94cb3afc24c85b6c38b6608.zip
busybox-240c255d8b349f06c94cb3afc24c85b6c38b6608.tar.gz
hush: simplify parse_stream
function old new delta parse_and_run_stream 292 289 -3 parse_stream 1218 1204 -14 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-17) Total: -17 bytes
Diffstat (limited to 'shell')
-rw-r--r--shell/hush.c48
1 files changed, 23 insertions, 25 deletions
diff --git a/shell/hush.c b/shell/hush.c
index e2259ce..aa05e3a 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -3717,7 +3717,7 @@ static int redirect_opt_num(o_string *o)
}
static int parse_stream(o_string *dest, struct parse_context *ctx,
- struct in_str *input0, const char *end_trigger);
+ struct in_str *input0, int end_trigger);
#if ENABLE_HUSH_TICK
static FILE *generate_stream_from_list(struct pipe *head)
@@ -3773,7 +3773,7 @@ static int process_command_subs(o_string *dest,
struct in_str pipe_str;
/* Recursion to generate command */
- retcode = parse_stream(&result, &inner, input, NULL);
+ retcode = parse_stream(&result, &inner, input, '\0');
if (retcode != 0)
return retcode; /* syntax error or EOF */
o_free(&result);
@@ -3818,7 +3818,7 @@ static int parse_group(o_string *dest, struct parse_context *ctx,
* Typically it's empty, but for function defs,
* it contains function name (without '()'). */
int rcode;
- const char *endch;
+ int endch;
struct parse_context sub;
struct command *command = ctx->command;
@@ -3840,9 +3840,9 @@ static int parse_group(o_string *dest, struct parse_context *ctx,
debug_printf_parse("parse_group return 1: syntax error, groups and arglists don't mix\n");
return 1;
}
- endch = "}";
+ endch = '}';
if (ch == '(') {
- endch = ")";
+ endch = ')';
command->grp_type = GRP_SUBSHELL;
}
rcode = parse_stream(dest, &sub, input, endch);
@@ -4220,7 +4220,7 @@ static int parse_stream_dquoted(o_string *dest, struct in_str *input, int dquote
* Net result is a list of pipes in ctx->list_head.
*/
static int parse_stream(o_string *dest, struct parse_context *ctx,
- struct in_str *input, const char *end_trigger)
+ struct in_str *input, int end_trigger)
{
int ch, m;
int redir_fd;
@@ -4232,8 +4232,9 @@ static int parse_stream(o_string *dest, struct parse_context *ctx,
* A single-quote triggers a bypass of the main loop until its mate is
* found. When recursing, quote state is passed in via dest->o_escape. */
- debug_printf_parse("parse_stream entered, end_trigger='%s' "
- "dest->o_assignment:%d\n", end_trigger, dest->o_assignment);
+ debug_printf_parse("parse_stream entered, end_trigger='%c' "
+ "dest->o_assignment:%d\n", end_trigger ? : 'X'
+ , dest->o_assignment);
dest->o_assignment = MAYBE_ASSIGNMENT;
initialize_context(ctx);
@@ -4267,7 +4268,9 @@ static int parse_stream(o_string *dest, struct parse_context *ctx,
}
continue;
}
+
/* m is SPECIAL ($,`), IFS, or ORDINARY_IF_QUOTED (*,#) */
+
if (m == CHAR_IFS) {
if (ch == EOF)
goto ret_EOF;
@@ -4285,29 +4288,25 @@ static int parse_stream(o_string *dest, struct parse_context *ctx,
continue;
}
#endif
- /* Treat newline as a command separator.
- * [why don't we handle it exactly like ';'? --vda] */
+ /* Treat newline as a command separator. */
done_pipe(ctx, PIPE_SEQ);
dest->o_assignment = MAYBE_ASSIGNMENT;
+ ch = ';';
+ /* note: if (m == CHAR_IFS) continue;
+ * will still trigger for us */
}
}
- if (end_trigger && strchr(end_trigger, ch)) {
- /* Special case: (...word) makes last word terminate,
- * as if ';' is seen */
- if (ch == ')') {
- done_word(dest, ctx);
-//err chk?
- done_pipe(ctx, PIPE_SEQ);
- dest->o_assignment = MAYBE_ASSIGNMENT;
- }
- /* What do we check here? */
+ if (end_trigger && end_trigger == ch) {
+//TODO: disallow "{ cmd }" without semicolon
+ done_word(dest, ctx);
+ done_pipe(ctx, PIPE_SEQ);
+ dest->o_assignment = MAYBE_ASSIGNMENT;
+ /* Do we sit outside of any if's, loops or case's? */
if (!HAS_KEYWORDS
IF_HAS_KEYWORDS(|| (ctx->ctx_res_w == RES_NONE && ctx->old_flag == 0))
) {
debug_printf_parse("parse_stream return 0: end_trigger char found\n");
- /* this makes us return 0, not -1 */
- end_trigger = NULL;
- goto ret;
+ return 0;
}
}
if (m == CHAR_IFS)
@@ -4531,7 +4530,6 @@ static int parse_stream(o_string *dest, struct parse_context *ctx,
/* Non-error returns */
ret_EOF:
debug_printf_parse("parse_stream return %d\n", -(end_trigger != NULL));
- ret:
done_word(dest, ctx);
done_pipe(ctx, PIPE_SEQ);
if (end_trigger) {
@@ -4584,7 +4582,7 @@ static int parse_and_run_stream(struct in_str *inp, int parse_flag)
* Example: "sleep 9999; echo TEST" + ctrl-C:
* TEST should be printed */
temp.o_assignment = MAYBE_ASSIGNMENT;
- rcode = parse_stream(&temp, &ctx, inp, ";\n");
+ rcode = parse_stream(&temp, &ctx, inp, ';');
debug_printf_parse("rcode %d ctx.old_flag %x\n", rcode, ctx.old_flag);
#if HAS_KEYWORDS
if (rcode != 1 && ctx.old_flag != 0) {