diff options
Diffstat (limited to 'shell/hush.c')
| -rw-r--r-- | shell/hush.c | 43 |
1 files changed, 24 insertions, 19 deletions
diff --git a/shell/hush.c b/shell/hush.c index f0d3726..eeec13b 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -3765,14 +3765,10 @@ static int process_command_subs(o_string *dest, FILE *p; struct in_str pipe_str; - initialize_context(&inner); - /* Recursion to generate command */ retcode = parse_stream(&result, &inner, input, subst_end); if (retcode != 0) return retcode; /* syntax error or EOF */ - done_word(&result, &inner); - done_pipe(&inner, PIPE_SEQ); o_free(&result); p = generate_stream_from_list(inner.list_head); @@ -3812,10 +3808,10 @@ static int parse_group(o_string *dest, struct parse_context *ctx, struct in_str *input, int ch) { /* dest contains characters seen prior to ( or {. - * Typically it's empty, but for functions defs, + * Typically it's empty, but for function defs, * it contains function name (without '()'). */ int rcode; - const char *endch = NULL; + const char *endch; struct parse_context sub; struct command *command = ctx->command; @@ -3837,7 +3833,6 @@ 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; } - initialize_context(&sub); endch = "}"; if (ch == '(') { endch = ")"; @@ -3845,8 +3840,6 @@ static int parse_group(o_string *dest, struct parse_context *ctx, } rcode = parse_stream(dest, &sub, input, endch); if (rcode == 0) { - done_word(dest, &sub); /* finish off the final word in the subcontext */ - done_pipe(&sub, PIPE_SEQ); /* and the final command there, too */ command->group = sub.list_head; } debug_printf_parse("parse_group return %d\n", rcode); @@ -4211,11 +4204,14 @@ static int parse_stream_dquoted(o_string *dest, struct in_str *input, int dquote goto again; } -/* Scan input, call done_word() whenever full IFS delimited word was seen. +/* Initalize ctx (i.e. caller does not need to do that). + * Scan input, call done_word() whenever full IFS delimited word was seen. * Call done_pipe if '\n' was seen (and end_trigger != NULL). * Return code is 0 if end_trigger char is met, * -1 on EOF (but if end_trigger == NULL then return 0), - * 1 for syntax error */ + * 1 for syntax error + * 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) { @@ -4230,6 +4226,7 @@ static int parse_stream(o_string *dest, struct parse_context *ctx, * 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); + initialize_context(ctx); is_in_dquote = dest->o_escape; while (1) { @@ -4269,7 +4266,7 @@ static int parse_stream(o_string *dest, struct parse_context *ctx, return 1; } if (ch == EOF) - break; + goto ret_EOF; /* If we aren't performing a substitution, treat * a newline as a command separator. * [why don't we handle it exactly like ';'? --vda] */ @@ -4297,11 +4294,14 @@ static int parse_stream(o_string *dest, struct parse_context *ctx, done_pipe(ctx, PIPE_SEQ); dest->o_assignment = MAYBE_ASSIGNMENT; } + /* What do we check here? */ 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"); - return 0; + /* this makes us return 0, not -1 */ + end_trigger = NULL; + goto ret; } } } @@ -4522,9 +4522,16 @@ static int parse_stream(o_string *dest, struct parse_context *ctx, bb_error_msg_and_die("BUG: unexpected %c\n", ch); } } /* while (1) */ + + /* Non-error returns */ + ret_EOF: debug_printf_parse("parse_stream return %d\n", -(end_trigger != NULL)); - if (end_trigger) - return -1; + ret: + done_word(dest, ctx); + done_pipe(ctx, PIPE_SEQ); + if (end_trigger) { + return -1; /* EOF found while expecting end_trigger */ + } return 0; } @@ -4564,7 +4571,6 @@ static int parse_and_run_stream(struct in_str *inp, int parse_flag) int rcode; do { - initialize_context(&ctx); update_charmap(); #if ENABLE_HUSH_INTERACTIVE inp->promptmode = 0; /* PS1 */ @@ -4574,16 +4580,15 @@ static int parse_and_run_stream(struct in_str *inp, int parse_flag) * TEST should be printed */ temp.o_assignment = MAYBE_ASSIGNMENT; rcode = parse_stream(&temp, &ctx, inp, ";\n"); + debug_printf_parse("rcode %d ctx.old_flag %x\n", rcode, ctx.old_flag); #if HAS_KEYWORDS if (rcode != 1 && ctx.old_flag != 0) { syntax(NULL); } #endif if (rcode != 1 IF_HAS_KEYWORDS(&& ctx.old_flag == 0)) { - done_word(&temp, &ctx); - done_pipe(&ctx, PIPE_SEQ); debug_print_tree(ctx.list_head, 0); - debug_printf_exec("parse_stream_outer: run_and_free_list\n"); + debug_printf_exec("parse_and_run_stream: run_and_free_list\n"); run_and_free_list(ctx.list_head); } else { /* We arrive here also if rcode == 1 (error in parse_stream) */ |