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author | Denys Vlasenko <vda.linux@googlemail.com> | 2017-07-21 09:50:55 +0200 |
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committer | Denys Vlasenko <vda.linux@googlemail.com> | 2017-07-21 09:50:55 +0200 |
commit | 72089cf6b4a77214ec4fd21d5ee5bf56958781cb (patch) | |
tree | a5cd9d8f47e909834d3dbc44f895556e68bcf18f /shell/cttyhack.c | |
parent | 75d151e31d135ebab083307ded4e9b98970baa75 (diff) | |
download | busybox-w32-72089cf6b4a77214ec4fd21d5ee5bf56958781cb.tar.gz busybox-w32-72089cf6b4a77214ec4fd21d5ee5bf56958781cb.tar.bz2 busybox-w32-72089cf6b4a77214ec4fd21d5ee5bf56958781cb.zip |
config: deindent all help texts
Those two spaces after tab have no effect, and always a nuisance when editing.
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'shell/cttyhack.c')
-rw-r--r-- | shell/cttyhack.c | 54 |
1 files changed, 27 insertions, 27 deletions
diff --git a/shell/cttyhack.c b/shell/cttyhack.c index 9a5f4bb52..9004b4763 100644 --- a/shell/cttyhack.c +++ b/shell/cttyhack.c | |||
@@ -14,45 +14,45 @@ | |||
14 | //config: bool "cttyhack (2.5 kb)" | 14 | //config: bool "cttyhack (2.5 kb)" |
15 | //config: default y | 15 | //config: default y |
16 | //config: help | 16 | //config: help |
17 | //config: One common problem reported on the mailing list is the "can't | 17 | //config: One common problem reported on the mailing list is the "can't |
18 | //config: access tty; job control turned off" error message, which typically | 18 | //config: access tty; job control turned off" error message, which typically |
19 | //config: appears when one tries to use a shell with stdin/stdout on | 19 | //config: appears when one tries to use a shell with stdin/stdout on |
20 | //config: /dev/console. | 20 | //config: /dev/console. |
21 | //config: This device is special - it cannot be a controlling tty. | 21 | //config: This device is special - it cannot be a controlling tty. |
22 | //config: | 22 | //config: |
23 | //config: The proper solution is to use the correct device instead of | 23 | //config: The proper solution is to use the correct device instead of |
24 | //config: /dev/console. | 24 | //config: /dev/console. |
25 | //config: | 25 | //config: |
26 | //config: cttyhack provides a "quick and dirty" solution to this problem. | 26 | //config: cttyhack provides a "quick and dirty" solution to this problem. |
27 | //config: It analyzes stdin with various ioctls, trying to determine whether | 27 | //config: It analyzes stdin with various ioctls, trying to determine whether |
28 | //config: it is a /dev/ttyN or /dev/ttySN (virtual terminal or serial line). | 28 | //config: it is a /dev/ttyN or /dev/ttySN (virtual terminal or serial line). |
29 | //config: On Linux it also checks sysfs for a pointer to the active console. | 29 | //config: On Linux it also checks sysfs for a pointer to the active console. |
30 | //config: If cttyhack is able to find the real console device, it closes | 30 | //config: If cttyhack is able to find the real console device, it closes |
31 | //config: stdin/out/err and reopens that device. | 31 | //config: stdin/out/err and reopens that device. |
32 | //config: Then it executes the given program. Opening the device will make | 32 | //config: Then it executes the given program. Opening the device will make |
33 | //config: that device a controlling tty. This may require cttyhack | 33 | //config: that device a controlling tty. This may require cttyhack |
34 | //config: to be a session leader. | 34 | //config: to be a session leader. |
35 | //config: | 35 | //config: |
36 | //config: Example for /etc/inittab (for busybox init): | 36 | //config: Example for /etc/inittab (for busybox init): |
37 | //config: | 37 | //config: |
38 | //config: ::respawn:/bin/cttyhack /bin/sh | 38 | //config: ::respawn:/bin/cttyhack /bin/sh |
39 | //config: | 39 | //config: |
40 | //config: Starting an interactive shell from boot shell script: | 40 | //config: Starting an interactive shell from boot shell script: |
41 | //config: | 41 | //config: |
42 | //config: setsid cttyhack sh | 42 | //config: setsid cttyhack sh |
43 | //config: | 43 | //config: |
44 | //config: Giving controlling tty to shell running with PID 1: | 44 | //config: Giving controlling tty to shell running with PID 1: |
45 | //config: | 45 | //config: |
46 | //config: # exec cttyhack sh | 46 | //config: # exec cttyhack sh |
47 | //config: | 47 | //config: |
48 | //config: Without cttyhack, you need to know exact tty name, | 48 | //config: Without cttyhack, you need to know exact tty name, |
49 | //config: and do something like this: | 49 | //config: and do something like this: |
50 | //config: | 50 | //config: |
51 | //config: # exec setsid sh -c 'exec sh </dev/tty1 >/dev/tty1 2>&1' | 51 | //config: # exec setsid sh -c 'exec sh </dev/tty1 >/dev/tty1 2>&1' |
52 | //config: | 52 | //config: |
53 | //config: Starting getty on a controlling tty from a shell script: | 53 | //config: Starting getty on a controlling tty from a shell script: |
54 | //config: | 54 | //config: |
55 | //config: # getty 115200 $(cttyhack) | 55 | //config: # getty 115200 $(cttyhack) |
56 | 56 | ||
57 | //usage:#define cttyhack_trivial_usage | 57 | //usage:#define cttyhack_trivial_usage |
58 | //usage: "[PROG ARGS]" | 58 | //usage: "[PROG ARGS]" |