diff options
Diffstat (limited to 'src/eval/cmd.c')
| -rw-r--r-- | src/eval/cmd.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/src/eval/cmd.c b/src/eval/cmd.c new file mode 100644 index 0000000..2896ab6 --- /dev/null +++ b/src/eval/cmd.c @@ -0,0 +1,110 @@ +/* ************************************************************************** */ +/* */ +/* ::: :::::::: */ +/* cmd.c :+: :+: :+: */ +/* +:+ +:+ +:+ */ +/* By: charles <charles.cabergs@gmail.com> +#+ +:+ +#+ */ +/* +#+#+#+#+#+ +#+ */ +/* Created: 2020/06/14 10:41:31 by charles #+# #+# */ +/* Updated: 2020/06/14 12:52:59 by charles ### ########.fr */ +/* */ +/* ************************************************************************** */ + +#include "eval.h" + +/* +** \brief Wrap a function in a fork +** \param fd_in fork input file descriptor +** \param fd_out fork output file descriptor +** \param passed param of the wrapped function +** \param wrapped function to wrap +*/ + +int fork_wrap( + int fd_in, + int fd_out, + void *passed, + int (*wrapped)(void *param)) +{ + int status; + pid_t child_pid; + + if ((child_pid = fork()) == -1) + return (-1); + if (child_pid == 0) + { + if (dup2(STDIN_FILENO, fd_in) == -1 || + dup2(STDOUT_FILENO, fd_out) == -1) + exit(EXIT_FAILURE); + if ((status = wrapped(passed)) == -1) + exit(EXIT_FAILURE); + exit(status); + } + wait(&child_pid); + return (WEXITSTATUS(child_pid)); +} + +/* +** \brief execve syscall wrapper passed it to fork_wrap +** \param param function params +** \return execve return value +*/ + +int forked_cmd(void *void_param) +{ + t_fork_param_cmd *param; + + param = void_param; + + if (param->builtin != NULL) + return (param->builtin(param->argv, param->env)); + else + return (execve(param->exec_path, param->argv, (char**)param->env->data)); +} + + + +int eval_cmd(t_env env, t_path path, t_ast *ast) +{ + t_fork_param_cmd param; + + // check in and out (single string) + // argv[0]: [string]: ambiguous redirect code 1 + + // check in and out (exist) + // argv[0]: [string]: No such file or directory (probably from errno) + + return (0); + /* if (in != NULL) */ + /* { */ + /* char **redir_in = preprocess(in); */ + /* if (redir_in[1] != NULL) */ + /* ambiguous; */ + /* if ((fd_in = open(cmd->in, O_RDONLY)) == -1) */ + /* file error; */ + /* } */ + /* */ + /* if (out != NULL) */ + /* { */ + /* char **redir_out = preprocess(out); */ + /* if (redir_out[1] != NULL) */ + /* ambiguous; */ + /* if ((fd_out = open(cmd->out, (is_append ? O_APPEND : O_WRONLY) | O_CREAT)) == -1) */ + /* file error; */ + /* } */ + /* */ + /* char **argv = preprocess(cmd_argv); */ + /* */ + /* param.builtin = builtin_search_func(argv[0]); */ + /* if (param.builtin) */ + /* param.exec_path = exec_search_path(path, env_search(env, "PATH"), argv[0]); */ + /* */ + /* // get cmd path */ + /* // argv[0]: [string]: command not found code 127 */ + /* if (param.exec_path == NULL) */ + /* not_found; */ + /* */ + /* param.argv = argv; */ + /* param.env = env; */ + /* return (fork_wrap(fd_in, fd_out, ¶m, &execve_wrapper)); */ +} |