85 lines
2.0 KiB
C
85 lines
2.0 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* pipe.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: apommier <apommier@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2022/03/07 11:13:32 by apommier #+# #+# */
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/* Updated: 2022/03/07 11:52:26 by apommier ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "minishell.h"
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void execute(t_cmd *cmd, char *infile, char *outfile)
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{
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//save in/out
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int ret;
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int fdout;
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int tmpin = dup(0);
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int tmpout= dup(1);
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int fdin;
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int fdpipe[2];
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int i;
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i = 0;
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//set the initial input
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if (infile)
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fdin = open(infile,O_READ);
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else //Use default input
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fdin=dup(tmpin);
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while( i < numsimplecommands)
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{
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//redirect input
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dup2(fdin, 0);
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close(fdin);
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//setup output
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if (i == numsimplecommands - 1)
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{
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if(outfile)// Last simple command
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fdout=open(outfile,……);
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else// Use default output
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fdout=dup(tmpout);
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}
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else
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{
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// Not last
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//simple command
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//create pipe
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//int fdpipe[2];
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pipe(fdpipe);
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fdout=fdpipe[1];
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fdin=fdpipe[0];
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}// if/else
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// Redirect output
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dup2(fdout,1);
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close(fdout);
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// Create child process
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ret=fork();
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if(ret==0)
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{
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execvp(scmd[i].args[0], scmd[i].args);
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perror(“execvpâ€);
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_exit(1);
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}
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i++;
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} //while
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//restore in/out defaults
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dup2(tmpin,0);
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dup2(tmpout,1);
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close(tmpin);
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close(tmpout);
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if (!background) {
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// Wait for last command
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waitpid(ret, NULL);
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}
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} // execute
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