diff options
Diffstat (limited to 'shell/hush.c')
| -rw-r--r-- | shell/hush.c | 39 |
1 files changed, 30 insertions, 9 deletions
diff --git a/shell/hush.c b/shell/hush.c index 1082738a2..503cb770b 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -2281,7 +2281,7 @@ static void o_addqblock(o_string *o, const char *str, int len) ordinary_cnt = len; o_addblock(o, str, ordinary_cnt); if (ordinary_cnt == len) - return; + return; /* NUL is already added by o_addblock */ str += ordinary_cnt; len -= ordinary_cnt + 1; /* we are processing + 1 char below */ @@ -2295,8 +2295,8 @@ static void o_addqblock(o_string *o, const char *str, int len) o_grow_by(o, sz); o->data[o->length] = ch; o->length++; - o->data[o->length] = '\0'; } + o->data[o->length] = '\0'; } static void o_addQblock(o_string *o, const char *str, int len) @@ -2385,6 +2385,7 @@ static int o_save_ptr_helper(o_string *o, int n) n, string_len, string_start); o->has_empty_slot = 0; } + o->has_quoted_part = 0; list[n] = (char*)(uintptr_t)string_len; return n + 1; } @@ -4754,8 +4755,13 @@ static void o_addblock_duplicate_backslash(o_string *o, const char *str, int len static int expand_on_ifs(o_string *output, int n, const char *str) { while (1) { - int word_len = strcspn(str, G.ifs); + int word_len; + + if (!*str) /* EOL - do not finalize word */ + break; + word_len = strcspn(str, G.ifs); if (word_len) { + /* We have WORD_LEN leading non-IFS chars */ if (!(output->o_expflags & EXP_FLAG_GLOB)) { o_addblock(output, str, word_len); } else { @@ -4769,13 +4775,25 @@ static int expand_on_ifs(o_string *output, int n, const char *str) /*o_addqblock(output, str, word_len); - WRONG: "v='*'; echo Z$v" prints "Z*" instead of Z* files */ } str += word_len; + if (!*str) /* EOL - do not finalize word */ + break; + goto finalize; /* optimization (can just fall thru) */ + } + /* Case "v=' a'; echo ''$v": we do need to finalize empty word */ + if (output->has_quoted_part + /* Case "v=' a'; echo $v": + * here nothing precedes the space in $v expansion, + * therefore we should not finish the word + * (IOW: if there *is* word to finalize, only then do it) + */ + || (output->length && output->data[output->length - 1]) + ) { + finalize: + o_addchr(output, '\0'); + debug_print_list("expand_on_ifs", output, n); + n = o_save_ptr(output, n); } - if (!*str) /* EOL - do not finalize word */ - break; - o_addchr(output, '\0'); - debug_print_list("expand_on_ifs", output, n); - n = o_save_ptr(output, n); - str += strspn(str, G.ifs); /* skip ifs chars */ + str += strspn(str, G.ifs); /* skip IFS chars */ } debug_print_list("expand_on_ifs[1]", output, n); return n; @@ -5270,11 +5288,13 @@ static NOINLINE int expand_vars_to_list(o_string *output, int n, char *arg) if (G.ifs[0]) o_addchr(output, G.ifs[0]); } + output->has_quoted_part = 1; } break; } case SPECIAL_VAR_SYMBOL: /* <SPECIAL_VAR_SYMBOL><SPECIAL_VAR_SYMBOL> */ /* "Empty variable", used to make "" etc to not disappear */ + output->has_quoted_part = 1; arg++; cant_be_null = 0x80; break; @@ -5316,6 +5336,7 @@ static NOINLINE int expand_vars_to_list(o_string *output, int n, char *arg) val = NULL; } } else { /* quoted $VAR, val will be appended below */ + output->has_quoted_part = 1; debug_printf_expand("quoted '%s', output->o_escape:%d\n", val, !!(output->o_expflags & EXP_FLAG_ESC_GLOB_CHARS)); } |