1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* exec.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: charles <charles.cabergs@gmail.com> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/04/01 17:06:11 by charles #+# #+# */
/* Updated: 2020/09/14 17:20:50 by charles ### ########.fr */
/* */
/* ************************************************************************** */
/*
** \file exec.c
** \brief Executable name and path
*/
#include "eval.h"
/*
** \brief Check if executable path is valid
** \param exec_path Executable path
** \return status code
*/
int exec_path_check(char *exec_path)
{
struct stat statbuf;
if (stat(exec_path, &statbuf) == -1)
return (errorf_ret(127, "%s: %s\n", exec_path, strerror(errno)));
if (S_ISDIR(statbuf.st_mode))
return (errorf_ret(126, "%s: Is a directory\n", exec_path));
//
if (!(statbuf.st_mode & 0444))
return (errorf_ret(126, "%s: %s\n", exec_path, strerror(EACCES)));
return (0);
}
/*
** \brief Search executable name in path
** \param path Path hash table
** \param path_var Path environment string in case we need to update path
** \param exec_name Executable name to search
** \return Executable path or NULL if not found or path update error
*/
int exec_search_path(t_path path, char *path_var, char *exec_name, char **exec_path)
{
if (ft_strchr(exec_name, '/') != NULL) // TODO test recursive link
{
*exec_path = exec_name;
return (0);
}
// TODO if PATH contain empty path, consider current directory files as cmd
if ((*exec_path = ft_htget(path, exec_name)) == NULL)
{
if (path_update(path, path_var) == NULL) // optimise by not updating not changed path in ht
return (EVAL_FATAL); // FIXME need to distiguish between malloc error and cmd not found error
if ((*exec_path = ft_htget(path, exec_name)) == NULL)
return (127);
}
return (0);
}
|
