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minishell

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Ladebeze66
2023-12-12 17:32:54 +01:00
commit 196e143285
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56
extern/extern.c vendored Executable file
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@@ -0,0 +1,56 @@
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* extern.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: fgras-ca <fgras-ca@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2023/11/11 17:45:14 by fgras-ca #+# #+# */
/* Updated: 2023/12/07 12:23:50 by fgras-ca ### ########.fr */
/* */
/* ************************************************************************** */
#include "../minishell.h"
pid_t create_process(char *path, char **args, char **environ)
{
pid_t pid;
pid = fork();
if (pid == 0)
{
execve(path, args, environ);
perror(RED"Command execution failed"RST);
exit(EXIT_FAILURE);
}
else if (pid < 0)
{
perror(RED"Fork failed"RST);
}
return (pid);
}
pid_t execute_external_command(char **args, char **environ)
{
pid_t pid;
char *path;
pid = -1;
if (!args || !args[0])
return (-1);
path = find_executable(args[0], environ);
if (!path)
{
write(2, args[0], ft_strlen(args[0]));
write(2, ": ", 2);
perror(RED "Command not found" RST);
return (-1);
}
pid = create_process(path, args, environ);
if (pid < 0)
{
perror(RED"Fork failed"RST);
}
free(path);
return (pid);
}

87
extern/extern_utils.c vendored Executable file
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@@ -0,0 +1,87 @@
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* extern_utils.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: fgras-ca <fgras-ca@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2023/11/27 19:48:07 by fgras-ca #+# #+# */
/* Updated: 2023/12/07 12:24:31 by fgras-ca ### ########.fr */
/* */
/* ************************************************************************** */
#include "../minishell.h"
static char *check_relative_path(const char *cmd)
{
if (cmd == NULL)
return (NULL);
if (ft_strncmp(cmd, "./", 2) == 0
|| ft_strncmp(cmd, "../", 3) == 0 || cmd[0] == '/')
{
if (access(cmd, X_OK) == 0)
return (ft_strdup(cmd));
}
return (NULL);
}
static char *build_full_path(const char *token, const char *cmd)
{
char *temp;
if (cmd == NULL)
return (NULL);
temp = malloc(ft_strlen(token) + ft_strlen(cmd) + 2);
if (temp == NULL)
return (NULL);
ft_strcpy(temp, token);
ft_strcat(temp, "/");
ft_strcat(temp, cmd);
return (temp);
}
static char *search_path(char *path, const char *cmd)
{
char *path_copy;
char *token;
char *temp;
char *full_path;
if (cmd == NULL)
return (NULL);
full_path = NULL;
path_copy = ft_strdup(path);
token = ft_strtok(path_copy, ":");
while (token != NULL)
{
temp = build_full_path(token, cmd);
if (temp && access(temp, X_OK) == 0)
{
full_path = ft_strdup(temp);
free(temp);
break ;
}
free(temp);
token = ft_strtok(NULL, ":");
}
free(path_copy);
return (full_path);
}
char *find_executable(const char *cmd, char **environ)
{
char *path;
char *relative_path_check;
char *full_path;
if (cmd == NULL)
return (NULL);
relative_path_check = check_relative_path(cmd);
if (relative_path_check != NULL)
return (relative_path_check);
path = get_env_value("PATH", environ);
if (!path || ft_strlen(path) == 0)
return (NULL);
full_path = search_path(path, cmd);
return (full_path);
}