diff options
Diffstat (limited to 'shell/hush.c')
| -rw-r--r-- | shell/hush.c | 96 |
1 files changed, 65 insertions, 31 deletions
diff --git a/shell/hush.c b/shell/hush.c index 4641dca11..9920e98c6 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -2241,7 +2241,10 @@ static void re_execute_shell(const char *s, int is_heredoc) debug_printf_exec("re_execute_shell pid:%d cmd:'%s'\n", getpid(), s); sigprocmask(SIG_SETMASK, &G.inherited_set, NULL); - execv(bb_busybox_exec_path, G.argv_from_re_execing); + execve(bb_busybox_exec_path, + G.argv_from_re_execing, + (is_heredoc ? pp /* points to NULL ptr */ : environ) + ); /* Fallback. Useful for init=/bin/hush usage etc */ if (G.argv0_for_re_execing[0] == '/') execv(G.argv0_for_re_execing, G.argv_from_re_execing); @@ -4402,35 +4405,40 @@ static int parse_group(o_string *dest, struct parse_context *ctx, #if ENABLE_HUSH_TICK || ENABLE_SH_MATH_SUPPORT /* Subroutines for copying $(...) and `...` things */ -static void add_till_backquote(o_string *dest, struct in_str *input); +static int add_till_backquote(o_string *dest, struct in_str *input); /* '...' */ -static void add_till_single_quote(o_string *dest, struct in_str *input) +static int add_till_single_quote(o_string *dest, struct in_str *input) { while (1) { int ch = i_getch(input); - if (ch == EOF) - break; + if (ch == EOF) { + syntax("unterminated '"); + return 1; + } if (ch == '\'') - break; + return 0; o_addchr(dest, ch); } } /* "...\"...`..`...." - do we need to handle "...$(..)..." too? */ -static void add_till_double_quote(o_string *dest, struct in_str *input) +static int add_till_double_quote(o_string *dest, struct in_str *input) { while (1) { int ch = i_getch(input); + if (ch == EOF) { + syntax("unterminated \""); + return 1; + } if (ch == '"') - break; + return 0; if (ch == '\\') { /* \x. Copy both chars. */ o_addchr(dest, ch); ch = i_getch(input); } - if (ch == EOF) - break; o_addchr(dest, ch); if (ch == '`') { - add_till_backquote(dest, input); + if (add_till_backquote(dest, input)) + return 1; o_addchr(dest, ch); continue; } @@ -4451,20 +4459,27 @@ static void add_till_double_quote(o_string *dest, struct in_str *input) * Example Output * echo `echo '\'TEST\`echo ZZ\`BEST` \TESTZZBEST */ -static void add_till_backquote(o_string *dest, struct in_str *input) +static int add_till_backquote(o_string *dest, struct in_str *input) { while (1) { int ch = i_getch(input); + if (ch == EOF) { + syntax("unterminated `"); + return 1; + } if (ch == '`') - break; - if (ch == '\\') { /* \x. Copy both chars unless it is \` */ + return 0; + if (ch == '\\') { + /* \x. Copy both chars unless it is \` */ int ch2 = i_getch(input); + if (ch2 == EOF) { + syntax("unterminated `"); + return 1; + } if (ch2 != '`' && ch2 != '$' && ch2 != '\\') o_addchr(dest, ch); ch = ch2; } - if (ch == EOF) - break; o_addchr(dest, ch); } } @@ -4480,13 +4495,15 @@ static void add_till_backquote(o_string *dest, struct in_str *input) * echo $(echo 'TEST)' BEST) TEST) BEST * echo $(echo \(\(TEST\) BEST) ((TEST) BEST */ -static void add_till_closing_paren(o_string *dest, struct in_str *input, bool dbl) +static int add_till_closing_paren(o_string *dest, struct in_str *input, bool dbl) { int count = 0; while (1) { int ch = i_getch(input); - if (ch == EOF) - break; + if (ch == EOF) { + syntax("unterminated )"); + return 1; + } if (ch == '(') count++; if (ch == ')') { @@ -4501,23 +4518,29 @@ static void add_till_closing_paren(o_string *dest, struct in_str *input, bool db } o_addchr(dest, ch); if (ch == '\'') { - add_till_single_quote(dest, input); + if (add_till_single_quote(dest, input)) + return 1; o_addchr(dest, ch); continue; } if (ch == '"') { - add_till_double_quote(dest, input); + if (add_till_double_quote(dest, input)) + return 1; o_addchr(dest, ch); continue; } - if (ch == '\\') { /* \x. Copy verbatim. Important for \(, \) */ + if (ch == '\\') { + /* \x. Copy verbatim. Important for \(, \) */ ch = i_getch(input); - if (ch == EOF) - break; + if (ch == EOF) { + syntax("unterminated )"); + return 1; + } o_addchr(dest, ch); continue; } } + return 0; } #endif /* ENABLE_HUSH_TICK || ENABLE_SH_MATH_SUPPORT */ @@ -4658,7 +4681,8 @@ static int handle_dollar(o_string *as_string, # if !BB_MMU pos = dest->length; # endif - add_till_closing_paren(dest, input, true); + if (add_till_closing_paren(dest, input, true)) + return 1; # if !BB_MMU if (as_string) { o_addstr(as_string, dest->data + pos); @@ -4671,20 +4695,19 @@ static int handle_dollar(o_string *as_string, } # endif # if ENABLE_HUSH_TICK - //int pos = dest->length; o_addchr(dest, SPECIAL_VAR_SYMBOL); o_addchr(dest, quote_mask | '`'); # if !BB_MMU pos = dest->length; # endif - add_till_closing_paren(dest, input, false); + if (add_till_closing_paren(dest, input, false)) + return 1; # if !BB_MMU if (as_string) { o_addstr(as_string, dest->data + pos); o_addchr(as_string, '`'); } # endif - //debug_printf_subst("SUBST RES2 '%s'\n", dest->data + pos); o_addchr(dest, SPECIAL_VAR_SYMBOL); # endif break; @@ -4778,7 +4801,8 @@ static int parse_stream_dquoted(o_string *as_string, //int pos = dest->length; o_addchr(dest, SPECIAL_VAR_SYMBOL); o_addchr(dest, 0x80 | '`'); - add_till_backquote(dest, input); + if (add_till_backquote(dest, input)) + return 1; o_addchr(dest, SPECIAL_VAR_SYMBOL); //debug_printf_subst("SUBST RES3 '%s'\n", dest->data + pos); goto again; @@ -5043,10 +5067,20 @@ static struct pipe *parse_stream(char **pstring, break; #if ENABLE_HUSH_TICK case '`': { - //int pos = dest.length; +#if !BB_MMU + int pos; +#endif o_addchr(&dest, SPECIAL_VAR_SYMBOL); o_addchr(&dest, '`'); - add_till_backquote(&dest, input); +#if !BB_MMU + pos = dest.length; +#endif + if (add_till_backquote(&dest, input)) + goto parse_error; +#if !BB_MMU + o_addstr(&ctx.as_string, dest.data + pos); + o_addchr(&ctx.as_string, '`'); +#endif o_addchr(&dest, SPECIAL_VAR_SYMBOL); //debug_printf_subst("SUBST RES3 '%s'\n", dest.data + pos); break; |