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authorDenys Vlasenko2018-04-10 13:09:26 +0200
committerDenys Vlasenko2018-04-10 14:23:49 +0200
commit1c57269b5d1891aef5093e7a5824f1adfbb33847 (patch)
tree19d79abafd20f2498b699b3cda60f9cd9860cc37 /shell
parent09b7a7ec0ea5ef602ff543dad1a90b6174a4f1c8 (diff)
downloadbusybox-1c57269b5d1891aef5093e7a5824f1adfbb33847.zip
busybox-1c57269b5d1891aef5093e7a5824f1adfbb33847.tar.gz
hush: simplify \<newline> code, part 1
function old new delta parse_stream 2919 2787 -132 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'shell')
-rw-r--r--shell/hush.c22
1 files changed, 11 insertions, 11 deletions
diff --git a/shell/hush.c b/shell/hush.c
index 0c57803..94ab450 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -4913,6 +4913,9 @@ static int encode_string(o_string *as_string,
ch, ch, !!(dest->o_expflags & EXP_FLAG_ESC_GLOB_CHARS));
if (process_bkslash && ch == '\\') {
if (next == EOF) {
+// TODO: what if in interactive shell a file with
+// echo "unterminated string\<eof>
+// is sourced?
syntax_error("\\<eof>");
xfunc_die();
}
@@ -5051,12 +5054,14 @@ static struct pipe *parse_stream(char **pstring,
next = '\0';
if (ch != '\n') {
- next = i_peek(input);
- /* Can't use i_peek_and_eat_bkslash_nl(input) here:
+ /* Do not break this case:
* echo '\
* '
- * will break.
+ * and
+ * echo z\\
*/
+ next = (ch == '\'' || ch == '\\') ? i_peek(input) : i_peek_and_eat_bkslash_nl(input);
+///
}
is_special = "{}<>;&|()#'" /* special outside of "str" */
@@ -5260,8 +5265,6 @@ static struct pipe *parse_stream(char **pstring,
goto parse_error;
}
redir_style = REDIRECT_OVERWRITE;
- if (next == '\\')
- next = i_peek_and_eat_bkslash_nl(input);
if (next == '>') {
redir_style = REDIRECT_APPEND;
ch = i_getch(input);
@@ -5282,8 +5285,6 @@ static struct pipe *parse_stream(char **pstring,
goto parse_error;
}
redir_style = REDIRECT_INPUT;
- if (next == '\\')
- next = i_peek_and_eat_bkslash_nl(input);
if (next == '<') {
redir_style = REDIRECT_HEREDOC;
heredoc_cnt++;
@@ -5327,6 +5328,7 @@ static struct pipe *parse_stream(char **pstring,
continue; /* back to top of while (1) */
}
break;
+#if 0 /* looks like we never reach this code */
case '\\':
if (next == '\n') {
/* It's "\<newline>" */
@@ -5338,6 +5340,7 @@ static struct pipe *parse_stream(char **pstring,
continue; /* back to top of while (1) */
}
break;
+#endif
}
if (ctx.is_assignment == MAYBE_ASSIGNMENT
@@ -5364,6 +5367,7 @@ static struct pipe *parse_stream(char **pstring,
break;
case '\\':
if (next == EOF) {
+//TODO: in ". FILE" containing "cmd\" (no newline) bash ignores last "\"
syntax_error("\\<eof>");
xfunc_die();
}
@@ -5473,8 +5477,6 @@ static struct pipe *parse_stream(char **pstring,
if (done_word(&ctx)) {
goto parse_error;
}
- if (next == '\\')
- next = i_peek_and_eat_bkslash_nl(input);
if (next == '&') {
ch = i_getch(input);
nommu_addchr(&ctx.as_string, ch);
@@ -5491,8 +5493,6 @@ static struct pipe *parse_stream(char **pstring,
if (ctx.ctx_res_w == RES_MATCH)
break; /* we are in case's "word | word)" */
#endif
- if (next == '\\')
- next = i_peek_and_eat_bkslash_nl(input);
if (next == '|') { /* || */
ch = i_getch(input);
nommu_addchr(&ctx.as_string, ch);