diff options
Diffstat (limited to 'shell/hush.c')
| -rw-r--r-- | shell/hush.c | 287 |
1 files changed, 152 insertions, 135 deletions
diff --git a/shell/hush.c b/shell/hush.c index 6ae42c8b5..0ac42c90b 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -1517,13 +1517,16 @@ static int o_save_ptr_helper(o_string *o, int n) list = (char**)o->data; memmove(list + n + 0x10, list + n, string_len); o->length += 0x10 * sizeof(list[0]); - } else - debug_printf_list("list[%d]=%d string_start=%d\n", n, string_len, string_start); + } else { + debug_printf_list("list[%d]=%d string_start=%d\n", + n, string_len, string_start); + } } else { /* We have empty slot at list[n], reuse without growth */ string_start = ((n+1 + 0xf) & ~0xf) * sizeof(list[0]); /* NB: n+1! */ string_len = o->length - string_start; - debug_printf_list("list[%d]=%d string_start=%d (empty slot)\n", n, string_len, string_start); + debug_printf_list("list[%d]=%d string_start=%d (empty slot)\n", + n, string_len, string_start); o->has_empty_slot = 0; } list[n] = (char*)(ptrdiff_t)string_len; @@ -1917,7 +1920,6 @@ static int expand_vars_to_list(o_string *output, int n, char *arg, char or_mask) } arg[0] = first_ch; - #if ENABLE_HUSH_TICK store_val: #endif @@ -2203,8 +2205,12 @@ typedef struct nommu_save_t { * XXX no exit() here. If you don't exec, use _exit instead. * The at_exit handlers apparently confuse the calling process, * in particular stdin handling. Not sure why? -- because of vfork! (vda) */ -static void pseudo_exec_argv(nommu_save_t *nommu_save, char **argv, int assignment_cnt, char **argv_expanded) NORETURN; -static void pseudo_exec_argv(nommu_save_t *nommu_save, char **argv, int assignment_cnt, char **argv_expanded) +static void pseudo_exec_argv(nommu_save_t *nommu_save, + char **argv, int assignment_cnt, + char **argv_expanded) NORETURN; +static void pseudo_exec_argv(nommu_save_t *nommu_save, + char **argv, int assignment_cnt, + char **argv_expanded) { int rcode; char **new_env; @@ -2279,8 +2285,12 @@ static int run_list(struct pipe *pi); /* Called after [v]fork() in run_pipe() */ -static void pseudo_exec(nommu_save_t *nommu_save, struct command *command, char **argv_expanded) NORETURN; -static void pseudo_exec(nommu_save_t *nommu_save, struct command *command, char **argv_expanded) +static void pseudo_exec(nommu_save_t *nommu_save, + struct command *command, + char **argv_expanded) NORETURN; +static void pseudo_exec(nommu_save_t *nommu_save, + struct command *command, + char **argv_expanded) { if (command->argv) pseudo_exec_argv(nommu_save, command->argv, command->assignment_cnt, argv_expanded); @@ -2655,7 +2665,8 @@ static int run_pipe(struct pipe *pi) setup_redirects(command, squirrel); new_env = expand_assignments(argv, command->assignment_cnt); old_env = putenv_all_and_save_old(new_env); - debug_printf_exec(": builtin '%s' '%s'...\n", x->cmd, argv_expanded[1]); + debug_printf_exec(": builtin '%s' '%s'...\n", + x->cmd, argv_expanded[1]); rcode = x->function(argv_expanded) & 0xff; #if ENABLE_FEATURE_SH_STANDALONE clean_up_and_ret: @@ -2677,7 +2688,8 @@ static int run_pipe(struct pipe *pi) save_nofork_data(&G.nofork_save); new_env = expand_assignments(argv, command->assignment_cnt); old_env = putenv_all_and_save_old(new_env); - debug_printf_exec(": run_nofork_applet '%s' '%s'...\n", argv_expanded[0], argv_expanded[1]); + debug_printf_exec(": run_nofork_applet '%s' '%s'...\n", + argv_expanded[0], argv_expanded[1]); rcode = run_nofork_applet_prime(&G.nofork_save, i, argv_expanded); goto clean_up_and_ret; } @@ -2701,7 +2713,8 @@ static int run_pipe(struct pipe *pi) #endif command = &(pi->cmds[i]); if (command->argv) { - debug_printf_exec(": pipe member '%s' '%s'...\n", command->argv[0], command->argv[1]); + debug_printf_exec(": pipe member '%s' '%s'...\n", + command->argv[0], command->argv[1]); } else debug_printf_exec(": pipe member with no argv\n"); @@ -2841,7 +2854,9 @@ static void debug_print_tree(struct pipe *pi, int lvl) struct command *command = &pi->cmds[prn]; char **argv = command->argv; - fprintf(stderr, "%*s prog %d assignment_cnt:%d", lvl*2, "", prn, command->assignment_cnt); + fprintf(stderr, "%*s prog %d assignment_cnt:%d", + lvl*2, "", prn, + command->assignment_cnt); if (command->group) { fprintf(stderr, " group %s: (argv=%p)\n", GRPTYPE[command->grp_type], @@ -3046,8 +3061,9 @@ static int run_list(struct pipe *pi) pi->cmds[0].argv[0] = xasprintf("%s=%s", for_varname, *for_lcur++); pi->cmds[0].assignment_cnt = 1; } - if (rword == RES_IN) /* "for v IN list;..." - "in" has no cmds anyway */ - continue; + if (rword == RES_IN) { + continue; /* "for v IN list;..." - "in" has no cmds anyway */ + } if (rword == RES_DONE) { continue; /* "done" has no cmds too */ } @@ -3603,7 +3619,8 @@ static int done_word(o_string *word, struct parse_context *ctx) debug_printf_parse(": checking '%s' for reserved-ness\n", word->data); if (reserved_word(word, ctx)) { o_reset(word); - debug_printf_parse("done_word return %d\n", (ctx->ctx_res_w == RES_SNTX)); + debug_printf_parse("done_word return %d\n", + (ctx->ctx_res_w == RES_SNTX)); return (ctx->ctx_res_w == RES_SNTX); } } @@ -3800,7 +3817,8 @@ static int parse_group(o_string *dest, struct parse_context *ctx, || dest->nonnull /* ""(... */ ) { syntax(NULL); - debug_printf_parse("parse_group return 1: syntax error, groups and arglists don't mix\n"); + debug_printf_parse("parse_group return 1: " + "syntax error, groups and arglists don't mix\n"); return 1; } endch = '}'; @@ -3812,7 +3830,8 @@ static int parse_group(o_string *dest, struct parse_context *ctx, /* empty ()/{} or parse error? */ if (!pipe_list || pipe_list == ERR_PTR) { syntax(NULL); - debug_printf_parse("parse_group return 1: parse_stream returned %p\n", pipe_list); + debug_printf_parse("parse_group return 1: " + "parse_stream returned %p\n", pipe_list); return 1; } command->group = pipe_list; @@ -3910,7 +3929,7 @@ static void add_till_closing_paren(o_string *dest, struct in_str *input, bool db break; if (ch == '(') count++; - if (ch == ')') + if (ch == ')') { if (--count < 0) { if (!dbl) break; @@ -3919,6 +3938,7 @@ static void add_till_closing_paren(o_string *dest, struct in_str *input, bool db break; } } + } o_addchr(dest, ch); if (ch == '\'') { add_till_single_quote(dest, input); @@ -3971,136 +3991,130 @@ static int handle_dollar(o_string *dest, struct in_str *input) o_addchr(dest, ch | quote_mask); o_addchr(dest, SPECIAL_VAR_SYMBOL); } else switch (ch) { - case '$': /* pid */ - case '!': /* last bg pid */ - case '?': /* last exit code */ - case '#': /* number of args */ - case '*': /* args */ - case '@': /* args */ - goto make_one_char_var; - case '{': { - bool first_char, all_digits; + case '$': /* pid */ + case '!': /* last bg pid */ + case '?': /* last exit code */ + case '#': /* number of args */ + case '*': /* args */ + case '@': /* args */ + goto make_one_char_var; + case '{': { + bool first_char, all_digits; - o_addchr(dest, SPECIAL_VAR_SYMBOL); - i_getch(input); - /* XXX maybe someone will try to escape the '}' */ - expansion = 0; - first_char = true; - all_digits = false; - while (1) { - ch = i_getch(input); - if (ch == '}') - break; + o_addchr(dest, SPECIAL_VAR_SYMBOL); + i_getch(input); + /* XXX maybe someone will try to escape the '}' */ + expansion = 0; + first_char = true; + all_digits = false; + while (1) { + ch = i_getch(input); + if (ch == '}') + break; - if (first_char) { - if (ch == '#') - /* ${#var}: length of var contents */ - goto char_ok; - else if (isdigit(ch)) { - all_digits = true; - goto char_ok; - } + if (first_char) { + if (ch == '#') + /* ${#var}: length of var contents */ + goto char_ok; + else if (isdigit(ch)) { + all_digits = true; + goto char_ok; } + } - if (expansion < 2 && - ((all_digits && !isdigit(ch)) || - (!all_digits && !isalnum(ch) && ch != '_'))) - { - /* handle parameter expansions - * http://www.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html#tag_02_06_02 - */ - if (first_char) - goto case_default; - switch (ch) { - case ':': /* null modifier */ - if (expansion == 0) { - debug_printf_parse(": null modifier\n"); - ++expansion; - break; - } - goto case_default; - + if (expansion < 2 + && ( (all_digits && !isdigit(ch)) + || (!all_digits && !isalnum(ch) && ch != '_') + ) + ) { + /* handle parameter expansions + * http://www.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html#tag_02_06_02 + */ + if (first_char) + goto case_default; + switch (ch) { + case ':': /* null modifier */ + if (expansion == 0) { + debug_printf_parse(": null modifier\n"); + ++expansion; + break; + } + goto case_default; #if 0 /* not implemented yet :( */ - case '#': /* remove prefix */ - case '%': /* remove suffix */ - if (expansion == 0) { - debug_printf_parse(": remove suffix/prefix\n"); - expansion = 2; - break; - } - goto case_default; -#endif - - case '-': /* default value */ - case '=': /* assign default */ - case '+': /* alternative */ - case '?': /* error indicate */ - debug_printf_parse(": parameter expansion\n"); - expansion = 2; - break; - - default: - case_default: - syntax("unterminated ${name}"); - debug_printf_parse("handle_dollar return 1: unterminated ${name}\n"); - return 1; - } + case '#': /* remove prefix */ + case '%': /* remove suffix */ + if (expansion == 0) { + debug_printf_parse(": remove suffix/prefix\n"); + expansion = 2; + break; + } + goto case_default; +#endif + case '-': /* default value */ + case '=': /* assign default */ + case '+': /* alternative */ + case '?': /* error indicate */ + debug_printf_parse(": parameter expansion\n"); + expansion = 2; + break; + default: + case_default: + syntax("unterminated ${name}"); + debug_printf_parse("handle_dollar return 1: unterminated ${name}\n"); + return 1; } - - char_ok: - debug_printf_parse(": '%c'\n", ch); - o_addchr(dest, ch | quote_mask); - quote_mask = 0; - first_char = false; } + char_ok: + debug_printf_parse(": '%c'\n", ch); + o_addchr(dest, ch | quote_mask); + quote_mask = 0; + first_char = false; + } + o_addchr(dest, SPECIAL_VAR_SYMBOL); + break; + } + case '(': { + i_getch(input); +#if ENABLE_SH_MATH_SUPPORT + if (i_peek(input) == '(') { + i_getch(input); + o_addchr(dest, SPECIAL_VAR_SYMBOL); + o_addchr(dest, /*quote_mask |*/ '+'); + add_till_closing_paren(dest, input, true); o_addchr(dest, SPECIAL_VAR_SYMBOL); break; } - case '(': { - i_getch(input); - -#if ENABLE_SH_MATH_SUPPORT - if (i_peek(input) == '(') { - i_getch(input); - o_addchr(dest, SPECIAL_VAR_SYMBOL); - o_addchr(dest, /*quote_mask |*/ '+'); - add_till_closing_paren(dest, input, true); - o_addchr(dest, SPECIAL_VAR_SYMBOL); - break; - } #endif - #if ENABLE_HUSH_TICK - //int pos = dest->length; - o_addchr(dest, SPECIAL_VAR_SYMBOL); - o_addchr(dest, quote_mask | '`'); - add_till_closing_paren(dest, input, false); - //debug_printf_subst("SUBST RES2 '%s'\n", dest->data + pos); - o_addchr(dest, SPECIAL_VAR_SYMBOL); + //int pos = dest->length; + o_addchr(dest, SPECIAL_VAR_SYMBOL); + o_addchr(dest, quote_mask | '`'); + add_till_closing_paren(dest, input, false); + //debug_printf_subst("SUBST RES2 '%s'\n", dest->data + pos); + o_addchr(dest, SPECIAL_VAR_SYMBOL); #endif - break; + break; + } + case '_': + i_getch(input); + ch = i_peek(input); + if (isalnum(ch)) { /* it's $_name or $_123 */ + ch = '_'; + goto make_var; } - case '_': - i_getch(input); - ch = i_peek(input); - if (isalnum(ch)) { /* it's $_name or $_123 */ - ch = '_'; - goto make_var; - } - /* else: it's $_ */ - case '-': - /* still unhandled, but should be eventually */ - bb_error_msg("unhandled syntax: $%c", ch); - return 1; - break; - default: - o_addQchr(dest, '$'); + /* else: it's $_ */ + /* TODO: */ + /* $_ Shell or shell script name; or last cmd name */ + /* $- Option flags set by set builtin or shell options (-i etc) */ + default: + o_addQchr(dest, '$'); } debug_printf_parse("handle_dollar return 0\n"); return 0; } -static int parse_stream_dquoted(o_string *dest, struct in_str *input, int dquote_end) +static int parse_stream_dquoted(o_string *dest, + struct in_str *input, int dquote_end) { int ch; int next; @@ -4149,7 +4163,8 @@ static int parse_stream_dquoted(o_string *dest, struct in_str *input, int dquote } if (ch == '$') { if (handle_dollar(dest, input) != 0) { - debug_printf_parse("parse_stream_dquoted return 1: handle_dollar returned non-0\n"); + debug_printf_parse("parse_stream_dquoted return 1: " + "handle_dollar returned non-0\n"); return 1; } goto again; @@ -4196,8 +4211,8 @@ static struct pipe *parse_stream(struct in_str *input, int end_trigger) /* Double-quote state is handled in the state variable is_in_dquote. * A single-quote triggers a bypass of the main loop until its mate is - * found. When recursing, quote state is passed in via dest->o_escape. */ - + * found. When recursing, quote state is passed in via dest->o_escape. + */ debug_printf_parse("parse_stream entered, end_trigger='%c'\n", end_trigger ? : 'X'); @@ -4338,7 +4353,8 @@ static struct pipe *parse_stream(struct in_str *input, int end_trigger) break; case '$': if (handle_dollar(&dest, input) != 0) { - debug_printf_parse("parse_stream parse error: handle_dollar returned non-0\n"); + debug_printf_parse("parse_stream parse error: " + "handle_dollar returned non-0\n"); goto parse_error; } break; @@ -4532,8 +4548,9 @@ static struct pipe *parse_stream(struct in_str *input, int end_trigger) /* Clean up allocated tree. * Samples for finding leaks on syntax error recovery path. - * Execute them from interactive shell and watch pmap `pidof hush`. - * while if false; then false; fi do break; done (bash accepts it) + * Run them from interactive shell, watch pmap `pidof hush`. + * while if false; then false; fi do break; done + * (bash accepts it) * while if false; then false; fi; do break; fi */ pctx = &ctx; |