diff options
author | Glenn L McGrath <bug1@ihug.co.nz> | 2003-11-16 02:19:05 +0300 |
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committer | Glenn L McGrath <bug1@ihug.co.nz> | 2003-11-16 02:19:05 +0300 |
commit | 5699b8525e855a0e851725980964e8755e365f5b (patch) | |
tree | fe3d7ead1f80f5b56e44e52a651f368adf92c91d /archival/libunarchive/open_transformer.c | |
parent | 54ac057c0016ac23b7367342f4834e33cf7d47d7 (diff) |
Move from read_gz to the pipe()+fork() method.
open_transformer(), common code for pipe+fork.
Function pointer for read() no longer needed.
Allow inflate to be initialised with a specified buffer size to avoid
over-reading.
Reset static variables in inflate_get_next_window to fix a bug where
only the first file in a .zip would be be extracted.
Diffstat (limited to 'archival/libunarchive/open_transformer.c')
-rw-r--r-- | archival/libunarchive/open_transformer.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/archival/libunarchive/open_transformer.c b/archival/libunarchive/open_transformer.c new file mode 100644 index 000000000..c1007f982 --- /dev/null +++ b/archival/libunarchive/open_transformer.c @@ -0,0 +1,50 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Library General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#include <stdlib.h> +#include <unistd.h> + +#include "libbb.h" + +/* transformer(), more than meets the eye */ +extern int open_transformer(int src_fd, int (*transformer)(int src_fd, int dst_fd)) +{ + int fd_pipe[2]; + int pid; + + if (pipe(fd_pipe) != 0) { + bb_perror_msg_and_die("Can't create pipe"); + } + + pid = fork(); + if (pid == -1) { + bb_perror_msg_and_die("Fork failed"); + } + + if (pid == 0) { + /* child process */ + close(fd_pipe[0]); /* We don't wan't to read from the pipe */ + transformer(src_fd, fd_pipe[1]); + close(fd_pipe[1]); /* Send EOF */ + exit(0); + /* notreached */ + } + /* parent process */ + close(fd_pipe[1]); /* Don't want to write down the pipe */ + close(src_fd); + + return(fd_pipe[0]); +} |