mirror of
https://github.com/Ladebeze66/minishell.git
synced 2025-12-15 21:56:58 +01:00
88 lines
2.3 KiB
C
Executable File
88 lines
2.3 KiB
C
Executable File
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* extern_utils.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: fgras-ca <fgras-ca@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2023/11/27 19:48:07 by fgras-ca #+# #+# */
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/* Updated: 2023/12/07 12:24:31 by fgras-ca ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "../minishell.h"
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static char *check_relative_path(const char *cmd)
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{
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if (cmd == NULL)
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return (NULL);
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if (ft_strncmp(cmd, "./", 2) == 0
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|| ft_strncmp(cmd, "../", 3) == 0 || cmd[0] == '/')
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{
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if (access(cmd, X_OK) == 0)
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return (ft_strdup(cmd));
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}
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return (NULL);
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}
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static char *build_full_path(const char *token, const char *cmd)
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{
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char *temp;
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if (cmd == NULL)
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return (NULL);
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temp = malloc(ft_strlen(token) + ft_strlen(cmd) + 2);
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if (temp == NULL)
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return (NULL);
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ft_strcpy(temp, token);
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ft_strcat(temp, "/");
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ft_strcat(temp, cmd);
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return (temp);
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}
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static char *search_path(char *path, const char *cmd)
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{
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char *path_copy;
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char *token;
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char *temp;
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char *full_path;
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if (cmd == NULL)
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return (NULL);
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full_path = NULL;
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path_copy = ft_strdup(path);
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token = ft_strtok(path_copy, ":");
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while (token != NULL)
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{
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temp = build_full_path(token, cmd);
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if (temp && access(temp, X_OK) == 0)
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{
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full_path = ft_strdup(temp);
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free(temp);
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break ;
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}
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free(temp);
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token = ft_strtok(NULL, ":");
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}
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free(path_copy);
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return (full_path);
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}
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char *find_executable(const char *cmd, char **environ)
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{
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char *path;
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char *relative_path_check;
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char *full_path;
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if (cmd == NULL)
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return (NULL);
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relative_path_check = check_relative_path(cmd);
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if (relative_path_check != NULL)
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return (relative_path_check);
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path = get_env_value("PATH", environ);
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if (!path || ft_strlen(path) == 0)
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return (NULL);
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full_path = search_path(path, cmd);
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return (full_path);
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}
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