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52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <stdlib.h>
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#include <unistd.h>
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#include "libbb.h"
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/* transformer(), more than meets the eye */
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int open_transformer(int src_fd, int (*transformer)(int src_fd, int dst_fd))
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{
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int fd_pipe[2];
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int pid;
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if (pipe(fd_pipe) != 0) {
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bb_perror_msg_and_die("Can't create pipe");
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}
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pid = fork();
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if (pid == -1) {
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bb_perror_msg_and_die("Fork failed");
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}
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if (pid == 0) {
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/* child process */
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close(fd_pipe[0]); /* We don't wan't to read from the parent */
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transformer(src_fd, fd_pipe[1]);
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close(fd_pipe[1]); /* Send EOF */
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close(src_fd);
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exit(0);
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/* notreached */
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}
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/* parent process */
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close(fd_pipe[1]); /* Don't want to write to the child */
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return(fd_pipe[0]);
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}
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