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| author | Denys Vlasenko <vda.linux@googlemail.com> | 2009-05-02 14:17:31 +0200 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2009-05-02 14:17:31 +0200 |
| commit | 1dd6cf867754030223fadd0f4d959039f713bfb1 (patch) | |
| tree | 66d78ab21de9cdfaa4d66f90d63c15a5e04fd046 | |
| parent | 54e0843e7dabc4f6d79781f8b07094dadacd4cd5 (diff) | |
| download | busybox-1dd6cf867754030223fadd0f4d959039f713bfb1.tar.gz | |
hush: fix multiple redirections of the same fd (bug 227)
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| -rw-r--r-- | shell/hush.c | 8 | ||||
| -rw-r--r-- | shell/hush_test/hush-misc/redir6.right | 4 | ||||
| -rwxr-xr-x | shell/hush_test/hush-misc/redir6.tests | 5 |
3 files changed, 15 insertions, 2 deletions
diff --git a/shell/hush.c b/shell/hush.c index cbec2dd71..5daca960c 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -2646,7 +2646,9 @@ static int setup_redirects(struct command *prog, int squirrel[]) for (redir = prog->redirects; redir; redir = redir->next) { if (redir->rd_type == REDIRECT_HEREDOC2) { /* rd_fd<<HERE case */ - if (squirrel && redir->rd_fd < 3) { + if (squirrel && redir->rd_fd < 3 + && squirrel[redir->rd_fd] < 0 + ) { squirrel[redir->rd_fd] = dup(redir->rd_fd); } /* for REDIRECT_HEREDOC2, rd_filename holds _contents_ @@ -2682,7 +2684,9 @@ static int setup_redirects(struct command *prog, int squirrel[]) } if (openfd != redir->rd_fd) { - if (squirrel && redir->rd_fd < 3) { + if (squirrel && redir->rd_fd < 3 + && squirrel[redir->rd_fd] < 0 + ) { squirrel[redir->rd_fd] = dup(redir->rd_fd); } if (openfd == REDIRFD_CLOSE) { diff --git a/shell/hush_test/hush-misc/redir6.right b/shell/hush_test/hush-misc/redir6.right new file mode 100644 index 000000000..a97c4bdf1 --- /dev/null +++ b/shell/hush_test/hush-misc/redir6.right @@ -0,0 +1,4 @@ +Testing multiple redirections to same fd +Hello +Done1 +Done2 diff --git a/shell/hush_test/hush-misc/redir6.tests b/shell/hush_test/hush-misc/redir6.tests new file mode 100755 index 000000000..c639ebb2d --- /dev/null +++ b/shell/hush_test/hush-misc/redir6.tests @@ -0,0 +1,5 @@ +echo "Testing multiple redirections to same fd" +# bug was making us lose fd #1 after this: +echo Hello >/dev/null 1>&2 +echo Done1 +echo Done2 >&2 |