From 967be9e750221ab2ab783f95df79bb26d290a45e Mon Sep 17 00:00:00 2001 From: Martial Simon Date: Mon, 15 Sep 2025 01:07:58 +0200 Subject: add: added projects --- 21sh/mypipe/mypipe.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 21sh/mypipe/mypipe.c (limited to '21sh/mypipe/mypipe.c') diff --git a/21sh/mypipe/mypipe.c b/21sh/mypipe/mypipe.c new file mode 100644 index 0000000..c019e42 --- /dev/null +++ b/21sh/mypipe/mypipe.c @@ -0,0 +1,43 @@ +#include "mypipe.h" + +#include +#include + +int exec_pipe(char **argv_left, char **argv_right) +{ + int fds[2]; + if (pipe(fds)) + return 1; + pid_t pid = fork(); + if (pid == 0) + { + // close read end + close(fds[0]); + // redirect stdout to write end + dup2(fds[1], STDOUT_FILENO); + // tell OS to close write end after exec + fcntl(fds[1], F_SETFD, FD_CLOEXEC); + // exec left + execvp(argv_left[0], argv_left); + return 0; + } + else if (pid > 0) + { + // close write end + close(fds[1]); + // redirect stdin to read end + dup2(fds[0], STDIN_FILENO); + // tell OS to close read end after exec + fcntl(fds[0], F_SETFD, FD_CLOEXEC); + // exec right + execvp(argv_right[0], argv_right); + // return 1 + return 1; + } + else + { + close(fds[0]); + close(fds[1]); + return 1; + } +} -- cgit v1.2.3