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hush: shrink and make more versatile error-reporting machinery
function old new delta syntax_error_unterm_ch - 31 +31 syntax_error_unterm_str - 14 +14 parse_stream 2356 2361 +5 syntax_error_at 12 14 +2 syntax_error 25 27 +2 syntax_error_unterminated 28 - -28 expand_variables 2063 2031 -32 ------------------------------------------------------------------------------ (add/remove: 2/1 grow/shrink: 3/1 up/down: 54/-60) Total: -6 bytes text data bss dec hex filename 67278 197 3184 70659 11403 busybox_old 67228 197 3184 70609 113d1 busybox_unstripped
This commit is contained in:
Denis Vlasenko
parent
05d3b7cc0d
commit
d68ae08cde
75
shell/hush.c
75
shell/hush.c
@ -663,23 +663,25 @@ static void xxfree(void *ptr)
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* HUSH_DEBUG >= 2 prints line number in this file where it was detected.
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*/
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#if HUSH_DEBUG < 2
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# define die_if_script(lineno, fmt, msg) die_if_script(fmt, msg)
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# define die_if_script(lineno, fmt...) die_if_script(fmt)
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# define syntax_error(lineno, msg) syntax_error(msg)
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# define syntax_error_at(lineno, msg) syntax_error_at(msg)
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# define syntax_error_unterminated(lineno, ch) syntax_error_unterminated(ch)
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# define syntax_error_unterm_ch(lineno, ch) syntax_error_unterm_ch(ch)
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# define syntax_error_unterm_str(lineno, s) syntax_error_unterm_str(s)
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#endif
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static void die_if_script(unsigned lineno, const char *fmt, const char *msg)
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static void die_if_script(unsigned lineno, const char *fmt, ...)
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{
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void FAST_FUNC (*fp)(const char *s, ...) = bb_error_msg_and_die;
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#if ENABLE_HUSH_INTERACTIVE
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if (G_interactive_fd)
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fp = bb_error_msg;
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#endif
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va_list p;
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#if HUSH_DEBUG >= 2
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bb_error_msg("hush.c:%u", lineno);
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#endif
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fp(fmt, msg);
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va_start(p, fmt);
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bb_verror_msg(fmt, p, NULL);
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va_end(p);
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if (!G_interactive_fd)
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xfunc_die();
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}
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static void syntax_error(unsigned lineno, const char *msg)
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@ -695,7 +697,7 @@ static void syntax_error_at(unsigned lineno, const char *msg)
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die_if_script(lineno, "syntax error at '%s'", msg);
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}
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static void syntax_error_unterminated(unsigned lineno, char ch)
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static void syntax_error_unterm_ch(unsigned lineno, char ch)
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{
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char msg[2];
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msg[0] = ch;
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@ -703,16 +705,23 @@ static void syntax_error_unterminated(unsigned lineno, char ch)
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die_if_script(lineno, "syntax error: unterminated %s", msg);
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}
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static void syntax_error_unterm_str(unsigned lineno, const char *s)
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{
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die_if_script(lineno, "syntax error: unterminated %s", s);
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}
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#if HUSH_DEBUG < 2
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# undef die_if_script
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# undef syntax_error
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# undef syntax_error_at
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# undef syntax_error_unterminated
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# undef syntax_error_unterm_ch
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# undef syntax_error_unterm_str
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#else
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# define die_if_script(fmt, msg) die_if_script(__LINE__, fmt, msg)
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# define die_if_script(fmt...) die_if_script(__LINE__, fmt)
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# define syntax_error(msg) syntax_error(__LINE__, msg)
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# define syntax_error_at(msg) syntax_error_at(__LINE__, msg)
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# define syntax_error_unterminated(ch) syntax_error_unterminated(__LINE__, ch)
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# define syntax_error_unterm_ch(ch) syntax_error_unterm_ch(__LINE__, ch)
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# define syntax_error_unterm_str(s) syntax_error_unterm_str(__LINE__, s)
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#endif
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@ -1957,7 +1966,7 @@ static int expand_vars_to_list(o_string *output, int n, char *arg, char or_mask)
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msg = "expression recursion loop detected";
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break;
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}
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die_if_script(msg, NULL);
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die_if_script(msg);
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}
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debug_printf_subst("ARITH RES '"arith_t_fmt"'\n", res);
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sprintf(arith_buf, arith_t_fmt, res);
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@ -2036,20 +2045,18 @@ static int expand_vars_to_list(o_string *output, int n, char *arg, char or_mask)
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debug_printf_expand("expand: op:%c (null:%s) test:%i\n", exp_op,
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exp_null ? "true" : "false", exp_test);
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if (exp_test) {
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if (exp_op == '?')
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//TODO: what does interactive bash
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if (exp_op == '?') {
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//TODO: how interactive bash aborts expansion mid-command?
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/* ${var?[error_msg_if_unset]} */
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/* ${var:?[error_msg_if_unset_or_null]} */
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/* mimic bash message */
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if (*exp_word) {
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char *msg = xasprintf("%s: %s", var, exp_word);
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die_if_script("%s", msg);
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free(msg);
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die_if_script("%s: %s",
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var,
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exp_word[0] ? exp_word : "parameter null or not set"
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);
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} else {
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die_if_script("%s: parameter null or not set", var);
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}
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else
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val = exp_word;
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}
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if (exp_op == '=') {
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/* ${var=[word]} or ${var:=[word]} */
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@ -4487,7 +4494,7 @@ static int add_till_single_quote(o_string *dest, struct in_str *input)
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while (1) {
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int ch = i_getch(input);
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if (ch == EOF) {
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syntax_error_unterminated('\'');
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syntax_error_unterm_ch('\'');
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return 1;
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}
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if (ch == '\'')
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@ -4501,7 +4508,7 @@ static int add_till_double_quote(o_string *dest, struct in_str *input)
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while (1) {
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int ch = i_getch(input);
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if (ch == EOF) {
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syntax_error_unterminated('"');
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syntax_error_unterm_ch('"');
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return 1;
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}
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if (ch == '"')
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@ -4539,7 +4546,7 @@ static int add_till_backquote(o_string *dest, struct in_str *input)
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while (1) {
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int ch = i_getch(input);
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if (ch == EOF) {
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syntax_error_unterminated('`');
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syntax_error_unterm_ch('`');
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return 1;
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}
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if (ch == '`')
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@ -4548,7 +4555,7 @@ static int add_till_backquote(o_string *dest, struct in_str *input)
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/* \x. Copy both chars unless it is \` */
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int ch2 = i_getch(input);
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if (ch2 == EOF) {
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syntax_error_unterminated('`');
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syntax_error_unterm_ch('`');
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return 1;
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}
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if (ch2 != '`' && ch2 != '$' && ch2 != '\\')
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@ -4576,7 +4583,7 @@ static int add_till_closing_paren(o_string *dest, struct in_str *input, bool dbl
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while (1) {
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int ch = i_getch(input);
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if (ch == EOF) {
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syntax_error_unterminated(')');
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syntax_error_unterm_ch(')');
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return 1;
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}
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if (ch == '(')
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@ -4608,7 +4615,7 @@ static int add_till_closing_paren(o_string *dest, struct in_str *input, bool dbl
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/* \x. Copy verbatim. Important for \(, \) */
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ch = i_getch(input);
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if (ch == EOF) {
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syntax_error_unterminated(')');
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syntax_error_unterm_ch(')');
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return 1;
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}
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o_addchr(dest, ch);
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@ -4726,7 +4733,7 @@ static int handle_dollar(o_string *as_string,
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break;
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default:
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case_default:
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syntax_error("unterminated ${name}");
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syntax_error_unterm_str("${name}");
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debug_printf_parse("handle_dollar return 1: unterminated ${name}\n");
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return 1;
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}
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@ -4831,7 +4838,7 @@ static int parse_stream_dquoted(o_string *as_string,
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}
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/* note: can't move it above ch == dquote_end check! */
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if (ch == EOF) {
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syntax_error_unterminated('"');
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syntax_error_unterm_ch('"');
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debug_printf_parse("parse_stream_dquoted return 1: unterminated \"\n");
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return 1;
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}
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@ -4954,7 +4961,7 @@ static struct pipe *parse_stream(char **pstring,
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struct pipe *pi;
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if (heredoc_cnt) {
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syntax_error("unterminated here document");
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syntax_error_unterm_str("here document");
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goto parse_error;
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}
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if (done_word(&dest, &ctx)) {
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@ -5043,7 +5050,7 @@ static struct pipe *parse_stream(char **pstring,
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* We require heredoc to be in enclosing {}/(),
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* if any.
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*/
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syntax_error("unterminated here document");
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syntax_error_unterm_str("here document");
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goto parse_error;
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}
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if (done_word(&dest, &ctx)) {
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@ -5123,7 +5130,7 @@ static struct pipe *parse_stream(char **pstring,
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while (1) {
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ch = i_getch(input);
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if (ch == EOF) {
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syntax_error_unterminated('\'');
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syntax_error_unterm_ch('\'');
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goto parse_error;
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}
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nommu_addchr(&ctx.as_string, ch);
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