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42 lines
826 B
C
42 lines
826 B
C
/*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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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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#include "unarchive.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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