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
|
#include "lslib.h"
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
void setup_environment(const char *shell, bool new_env, bool clear_env, const struct passwd *pw) {
if (!shell || !shell[0])
shell = DEFAULT_SHELL;
if (clear_env) {
const char* term;
term = getenv("TERM");
clearenv();
if (term)
xsetenv("TERM", term);
xsetenv("PATH", DEFAULT_PATH);
}
if (new_env) {
xsetenv("USER", pw->pw_name);
xsetenv("LOGNAME", pw->pw_name);
xsetenv("HOME", pw->pw_dir);
xsetenv("SHELL", shell);
}
}
void exec_shell(const char *shell, bool loginshell, const char **additional_args) {
const char** args;
args = additional_args;
while (args && *args)
args++;
args = xzalloc(sizeof(args[0]) * (2 + (args - additional_args)));
if (!shell || !shell[0])
shell = DEFAULT_SHELL;
args[0] = get_last_component(shell);
if (loginshell) {
size_t len = strlen(shell) + 2;
char* arg = xalloc(len);
arg[0] = '-';
memcpy(&arg[1], shell, len - 1);
args[0] = arg;
}
if (additional_args) {
int count = 0;
while (*additional_args)
args[++count] = *additional_args++;
}
execv(shell, (char**) args);
error("cannot execute '%s'", shell);
}
|
