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author | Denys Vlasenko <vda.linux@googlemail.com> | 2017-04-12 13:58:40 +0200 |
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committer | Denys Vlasenko <vda.linux@googlemail.com> | 2017-04-12 13:58:40 +0200 |
commit | 783d57af7bb2b851c16cf87df848e0365e5052da (patch) | |
tree | 71bb23e51b9cb40eac4a6fb831383134c1fc45a0 /miscutils/setsid.c | |
parent | ac47a00e2ec398b04c3141cd3434a6e4b95740b1 (diff) | |
download | busybox-w32-783d57af7bb2b851c16cf87df848e0365e5052da.tar.gz busybox-w32-783d57af7bb2b851c16cf87df848e0365e5052da.tar.bz2 busybox-w32-783d57af7bb2b851c16cf87df848e0365e5052da.zip |
Sort some miscutils/ applets into coreutils or util-linux
No code changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'miscutils/setsid.c')
-rw-r--r-- | miscutils/setsid.c | 82 |
1 files changed, 0 insertions, 82 deletions
diff --git a/miscutils/setsid.c b/miscutils/setsid.c deleted file mode 100644 index 143a8f8fa..000000000 --- a/miscutils/setsid.c +++ /dev/null | |||
@@ -1,82 +0,0 @@ | |||
1 | /* vi: set sw=4 ts=4: */ | ||
2 | /* | ||
3 | * setsid.c -- execute a command in a new session | ||
4 | * Rick Sladkey <jrs@world.std.com> | ||
5 | * In the public domain. | ||
6 | * | ||
7 | * 1999-02-22 Arkadiusz Mickiewicz <misiek@pld.ORG.PL> | ||
8 | * - added Native Language Support | ||
9 | * | ||
10 | * 2001-01-18 John Fremlin <vii@penguinpowered.com> | ||
11 | * - fork in case we are process group leader | ||
12 | * | ||
13 | * 2004-11-12 Paul Fox | ||
14 | * - busyboxed | ||
15 | */ | ||
16 | //config:config SETSID | ||
17 | //config: bool "setsid" | ||
18 | //config: default y | ||
19 | //config: help | ||
20 | //config: setsid runs a program in a new session | ||
21 | |||
22 | //applet:IF_SETSID(APPLET(setsid, BB_DIR_USR_BIN, BB_SUID_DROP)) | ||
23 | |||
24 | //kbuild:lib-$(CONFIG_SETSID) += setsid.o | ||
25 | |||
26 | //usage:#define setsid_trivial_usage | ||
27 | //usage: "[-c] PROG ARGS" | ||
28 | //usage:#define setsid_full_usage "\n\n" | ||
29 | //usage: "Run PROG in a new session. PROG will have no controlling terminal\n" | ||
30 | //usage: "and will not be affected by keyboard signals (^C etc).\n" | ||
31 | //usage: "\n -c Set controlling terminal to stdin" | ||
32 | |||
33 | #include "libbb.h" | ||
34 | |||
35 | int setsid_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; | ||
36 | int setsid_main(int argc UNUSED_PARAM, char **argv) | ||
37 | { | ||
38 | unsigned opt; | ||
39 | |||
40 | opt_complementary = "-1"; /* at least one arg */ | ||
41 | opt = getopt32(argv, "+c"); /* +: stop on first non-opt */ | ||
42 | argv += optind; | ||
43 | |||
44 | /* setsid() is allowed only when we are not a process group leader. | ||
45 | * Otherwise our PID serves as PGID of some existing process group | ||
46 | * and cannot be used as PGID of a new process group. | ||
47 | * | ||
48 | * Example: setsid() below fails when run alone in interactive shell: | ||
49 | * $ setsid PROG | ||
50 | * because shell's child (setsid) is put in a new process group. | ||
51 | * But doesn't fail if shell is not interactive | ||
52 | * (and therefore doesn't create process groups for pipes), | ||
53 | * or if setsid is not the first process in the process group: | ||
54 | * $ true | setsid PROG | ||
55 | * or if setsid is executed in backquotes (`setsid PROG`)... | ||
56 | */ | ||
57 | if (setsid() < 0) { | ||
58 | pid_t pid = fork_or_rexec(argv); | ||
59 | if (pid != 0) { | ||
60 | /* parent */ | ||
61 | /* TODO: | ||
62 | * we can waitpid(pid, &status, 0) and then even | ||
63 | * emulate exitcode, making the behavior consistent | ||
64 | * in both forked and non forked cases. | ||
65 | * However, the code is larger and upstream | ||
66 | * does not do such trick. | ||
67 | */ | ||
68 | return EXIT_SUCCESS; | ||
69 | } | ||
70 | |||
71 | /* child */ | ||
72 | /* now there should be no error: */ | ||
73 | setsid(); | ||
74 | } | ||
75 | |||
76 | if (opt) { | ||
77 | /* -c: set (with stealing) controlling tty */ | ||
78 | ioctl(0, TIOCSCTTY, 1); | ||
79 | } | ||
80 | |||
81 | BB_EXECVP_or_die(argv); | ||
82 | } | ||