117 lines
3.2 KiB
C
117 lines
3.2 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* find_access.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: lperrey <lperrey@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2021/11/16 01:57:38 by lperrey #+# #+# */
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/* Updated: 2021/12/20 14:23:40 by hulamy ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "minishell.h"
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static int search_cmd_path(char *cmd_name, char **cmd_path,
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char *path[]);
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static t_builtin_f search_builtin(char *cmd_name);
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static int handle_access_error(char *file_name);
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/*
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* 2.8.2 Exit Status for Commands
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* https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html
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* #tag_18_08_02
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*/
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/*
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* TODO : faire des test sur la valeur de errno selon les cas (if directory, if
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* pathname invalid, ...)
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*/
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int cmd_find_access(t_cmd *cmd, char *path[])
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{
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if (ft_strchr(cmd->argv[0], '/'))
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{
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if (access(cmd->argv[0], X_OK) == -1)
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cmd->error = handle_access_error(cmd->argv[0]);
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else
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{
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cmd->path = ft_strdup(cmd->argv[0]);
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if (!cmd->path)
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return (0);
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}
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}
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else
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{
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cmd->builtin_f = search_builtin(cmd->argv[0]);
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if (cmd->builtin_f)
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return (1);
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if (search_cmd_path(cmd->argv[0], &cmd->path, path) == -1)
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return (0);
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if (!cmd->path)
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{
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cmd->error = EXIT_CMD_NOT_FOUND;
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shell_error(cmd->argv[0], ": ", "command not found", 0);
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}
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}
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return (1);
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}
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static int search_cmd_path(char *cmd_name, char **cmd_path, char *path[])
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{
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int i;
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if (!path)
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return (1);
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cmd_name = ft_strjoin("/", cmd_name);
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if (!cmd_name)
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return (ft_reti_perror(-1, "search_cmd_path()"));
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i = 0;
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while (path[i])
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{
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*cmd_path = ft_strjoin(path[i], cmd_name);
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if (!*cmd_path)
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return (ft_reti_perror(-1, "search_cmd_path()"));
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if (access(*cmd_path, X_OK) == 0)
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break ;
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else
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ft_free_null(cmd_path);
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i++;
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}
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free(cmd_name);
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return (1);
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}
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static t_builtin_f search_builtin(char *cmd_name)
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{
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if (ft_strncmp(cmd_name, "echo", 4 + 1) == 0)
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return (&builtin_echo);
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else if (ft_strncmp(cmd_name, "cd", 2 + 1) == 0)
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return (&builtin_cd);
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else if (ft_strncmp(cmd_name, "pwd", 3 + 1) == 0)
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return (&builtin_pwd);
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else if (ft_strncmp(cmd_name, "export", 6 + 1) == 0)
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return (&builtin_export);
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else if (ft_strncmp(cmd_name, "unset", 5 + 1) == 0)
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return (&builtin_unset);
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else if (ft_strncmp(cmd_name, "env", 3 + 1) == 0)
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return (&builtin_env);
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else if (ft_strncmp(cmd_name, "exit", 4 + 1) == 0)
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return (&builtin_exit);
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return (NULL);
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}
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static int handle_access_error(char *file_name)
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{
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int tmp;
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tmp = errno;
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shell_perror(file_name, ": ", "", 0);
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errno = tmp;
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if (errno == EACCES)
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return (EXIT_CMD_NOT_EXE);
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else if (errno == ENOENT)
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return (EXIT_CMD_NOT_FOUND);
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return (1);
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}
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