blob: 7b9421af1eefb54debe2affbb4b5fdeb9a2cbdc1
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * linux32/linux64 allows for changing uname emulation. |
4 | * |
5 | * Copyright 2002 Andi Kleen, SuSE Labs. |
6 | * |
7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
8 | */ |
9 | |
10 | //usage:#define setarch_trivial_usage |
11 | //usage: "personality PROG ARGS" |
12 | //usage:#define setarch_full_usage "\n\n" |
13 | //usage: "Personality may be:\n" |
14 | //usage: " linux32 Set 32bit uname emulation\n" |
15 | //usage: " linux64 Set 64bit uname emulation" |
16 | //usage: |
17 | //usage:#define linux32_trivial_usage NOUSAGE_STR |
18 | //usage:#define linux32_full_usage "" |
19 | //usage: |
20 | //usage:#define linux64_trivial_usage NOUSAGE_STR |
21 | //usage:#define linux64_full_usage "" |
22 | |
23 | #include <sys/personality.h> |
24 | |
25 | #include "libbb.h" |
26 | |
27 | int setarch_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
28 | int setarch_main(int argc UNUSED_PARAM, char **argv) |
29 | { |
30 | int pers; |
31 | |
32 | /* Figure out what personality we are supposed to switch to ... |
33 | * we can be invoked as either: |
34 | * argv[0],argv[1] == "setarch","personality" |
35 | * argv[0] == "personality" |
36 | */ |
37 | if (ENABLE_SETARCH && applet_name[0] == 's' |
38 | && argv[1] && strncpy(argv[1], "linux", 5) |
39 | ) { |
40 | applet_name = argv[1]; |
41 | argv++; |
42 | } |
43 | if (applet_name[5] == '6') /* linux64 */ |
44 | pers = PER_LINUX; |
45 | else if (applet_name[5] == '3') /* linux32 */ |
46 | pers = PER_LINUX32; |
47 | else |
48 | bb_show_usage(); |
49 | |
50 | argv++; |
51 | if (argv[0] == NULL) |
52 | bb_show_usage(); |
53 | |
54 | /* Try to set personality */ |
55 | if (personality(pers) >= 0) { |
56 | /* Try to execute the program */ |
57 | BB_EXECVP(argv[0], argv); |
58 | } |
59 | |
60 | bb_simple_perror_msg_and_die(argv[0]); |
61 | } |
62 |