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| author | Denys Vlasenko <vda.linux@googlemail.com> | 2020-02-17 12:11:26 +0100 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2020-02-17 12:11:26 +0100 |
| commit | 74aaf05170d6f224194c98ee0434e2decae45735 (patch) | |
| tree | c228795cc7ccfcf7cfab18c054ef7bc8e9d775d8 /shell | |
| parent | afc91faeddd6b8234dccea2f7913f57a5bb3d1ec (diff) | |
| download | busybox-74aaf05170d6f224194c98ee0434e2decae45735.tar.gz | |
ash: parser: Save/restore here-documents in command substitution
Upstream comment:
Date: Sat, 19 May 2018 02:39:42 +0800
parser: Save/restore here-documents in command substitution
This patch changes the parsing of here-documents within command
substitution, both old style and new style. In particular, the
original here-document list is saved upon the beginning of parsing
command substitution and restored when exiting.
This means that here-documents outside of command substitution
can no longer be filled by text within it and vice-versa.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'shell')
| -rw-r--r-- | shell/ash.c | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/shell/ash.c b/shell/ash.c index fbe8dd9e4..e0ddf7198 100644 --- a/shell/ash.c +++ b/shell/ash.c @@ -12733,6 +12733,7 @@ parsebackq: { union node *n; char *str; size_t savelen; + struct heredoc *saveheredoclist; smallint saveprompt = 0; str = NULL; @@ -12808,6 +12809,9 @@ parsebackq: { *nlpp = stzalloc(sizeof(**nlpp)); /* (*nlpp)->next = NULL; - stzalloc did it */ + saveheredoclist = heredoclist; + heredoclist = NULL; + if (oldstyle) { saveprompt = doprompt; doprompt = 0; @@ -12817,18 +12821,21 @@ parsebackq: { if (oldstyle) doprompt = saveprompt; - else if (readtoken() != TRP) - raise_error_unexpected_syntax(TRP); + else { + if (readtoken() != TRP) + raise_error_unexpected_syntax(TRP); + setinputstring(nullstr); + parseheredoc(); + } + + heredoclist = saveheredoclist; (*nlpp)->n = n; - if (oldstyle) { - /* - * Start reading from old file again, ignoring any pushed back - * tokens left from the backquote parsing - */ - popfile(); + /* Start reading from old file again. */ + popfile(); + /* Ignore any pushed back tokens left from the backquote parsing. */ + if (oldstyle) tokpushback = 0; - } while (stackblocksize() <= savelen) growstackblock(); STARTSTACKSTR(out); |