diff options
Diffstat (limited to 'src/eval/op.c')
| -rw-r--r-- | src/eval/op.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/eval/op.c b/src/eval/op.c new file mode 100644 index 0000000..e47698b --- /dev/null +++ b/src/eval/op.c @@ -0,0 +1,49 @@ +/* ************************************************************************** */ +/* */ +/* ::: :::::::: */ +/* op.c :+: :+: :+: */ +/* +:+ +:+ +:+ */ +/* By: charles <charles.cabergs@gmail.com> +#+ +:+ +#+ */ +/* +#+#+#+#+#+ +#+ */ +/* Created: 2020/06/17 15:27:22 by charles #+# #+# */ +/* Updated: 2020/06/17 17:03:48 by charles ### ########.fr */ +/* */ +/* ************************************************************************** */ + +#include "eval.h" + +// TODO: add parent tag on first operation of parent to fork +int eval_op(int fds[2], t_env env, t_path path, t_op *op) +{ + int status; + int left_fds[2]; + int right_fds[2]; + int p[2]; + + left_fds[FDS_READ] = fds[FDS_READ]; + left_fds[FDS_WRITE] = MS_NO_FD; + right_fds[FDS_READ] = MS_NO_FD; + right_fds[FDS_WRITE] = fds[FDS_WRITE]; + if (op->sep == TAG_PIPE) + { + pipe(p); + left_fds[FDS_WRITE] = p[FDS_WRITE]; + right_fds[FDS_READ] = p[FDS_READ]; + } + if ((status = eval(left_fds, env, path, op->left)) == -1) + return (-1); + if ((op->sep == TAG_AND && status != 0) || + (op->sep == TAG_PIPE && status != 0) || + (op->sep == TAG_OR && status == 0)) + return (status); + return (eval(right_fds, env, path, op->right)); +} + +int eval(int fds[2], t_env env, t_path path, t_ast *ast) +{ + if (ast->tag == AST_OP) + return (eval_op(fds, env, path, &ast->op)); + if (ast->tag == AST_CMD) + return (eval_cmd(fds, env, path, ast)); + return (-1); +} |