48 lines
1.6 KiB
C
48 lines
1.6 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* exec_pipe.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: jhalford <jack@crans.org> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2016/11/27 21:13:23 by jhalford #+# #+# */
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/* Updated: 2017/02/17 14:36:28 by jhalford ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "exec.h"
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int exec_pipe(t_btree **ast)
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{
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int fds[2];
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int start;
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t_data *data;
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t_process *p;
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data = data_singleton();
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p = &data_singleton()->exec.process;
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pipe(fds);
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/* DG("pipe %i->%i", fds[PIPE_WRITE], fds[PIPE_READ]); */
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p->fdout = fds[PIPE_WRITE];
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start = IS_PIPESTART(p->attributes);
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p->toclose = fds[PIPE_READ];
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p->attributes &= ~PROCESS_PIPEEND;
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ft_exec(&(*ast)->left);
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p->attributes &= ~PROCESS_PIPESTART;
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p->toclose = STDIN;
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close(fds[PIPE_WRITE]);
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p->fdout = STDOUT;
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p->fdin = fds[PIPE_READ];
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p->attributes |= PROCESS_PIPEEND;
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ft_exec(&(*ast)->right);
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if (start)
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p->attributes |= PROCESS_PIPESTART;
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close(fds[PIPE_READ]);
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p->fdin = STDIN;
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btree_delone(ast, &ast_free);
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return (0);
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}
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