bash：将某些内容回显到窗口的右端（右对齐）
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bash: echo something to right end of window (right aligned)
提问by Stoic
I am looking for producing success/fail messages which are right aligned in bash. An example would be what apache2 produces on executing: sudo /etc/init.d/apache2 reloadetc.
我正在寻找在 bash 中正确对齐的成功/失败消息。一个例子是 apache2 在执行时产生的内容：sudo /etc/init.d/apache2 reload等。
In above example, apache2 produces very nice and concise [OK]or [fail]message which are right aligned.
在上面的例子中，apache2 产生非常漂亮和简洁的[OK]或[fail]右对齐的消息。
Also, would love to know how to get the text red, in case, we are to produce a [fail]message.
另外，很想知道如何使文本变红，以防万一，我们要生成一条[fail]消息。
采纳答案by SiegeX
#!/bin/bash
RED=$(tput setaf 1)
GREEN=$(tput setaf 2)
NORMAL=$(tput sgr0)
col=80 # change this to whatever column you want the output to start at
if <some condition here>; then
printf '%s%*s%s' "$GREEN" $col "[OK]" "$NORMAL"
else
printf '%s%*s%s' "$RED" $col "[FAIL]" "$NORMAL"
fi
回答by Alo?ké Go
Have a look at this thread, might be interesting : how to write a bash script like the ones used in init.d?
看看这个线程，可能会很有趣：如何编写像 init.d 中使用的那样的 bash 脚本？
On Linux CentOS 6.5, i'm using the /etc/init.d/functions file:
在 Linux CentOS 6.5 上，我使用 /etc/init.d/functions 文件：
#!/bin/bash
. /etc/init.d/functions # include the said file
action "Description of the action" command
exit 0
assuming commandreturns 0on success, positive value if an error occurs.
To let the script be easy to read, i use a function call instead of the whole command.
假设成功command返回0，如果发生错误，则为正值。为了让脚本易于阅读，我使用函数调用而不是整个命令。
Here is an example:
下面是一个例子：
#!/bin/bash
. /etc/init.d/functions
this_will_fail()
{
# Do some operations...
return 1
}
this_will_succeed()
{
# Do other operations...
return 0
}
action "This will fail" this_will_fail
action "This will succeed" this_will_succeed
exit 0
resulting in:
(note : french locale ;-) )
结果：（
注意：法语语言环境；-)）
Hope it'll help !
希望它会有所帮助！
回答by Neil McGill
Here is something mostly based on the centos 'functions' script, but more stripped down
这里有一些主要基于 centos 'functions' 脚本的东西，但更多的是精简
#!/bin/bash
RES_COL=60
MOVE_TO_COL="printf \033[${RES_COL}G"
DULL=0
BRIGHT=1
FG_BLACK=30
FG_RED=31
FG_GREEN=32
FG_YELLOW=33
FG_BLUE=34
FG_MAGENTA=35
FG_CYAN=36
FG_WHITE=37
ESC="^[["
NORMAL="${ESC}m"
RESET="${ESC}${DULL};${FG_WHITE};${BG_NULL}m"
BLACK="${ESC}${DULL};${FG_BLACK}m"
RED="${ESC}${DULL};${FG_RED}m"
GREEN="${ESC}${DULL};${FG_GREEN}m"
YELLOW="${ESC}${DULL};${FG_YELLOW}m"
BLUE="${ESC}${DULL};${FG_BLUE}m"
MAGENTA="${ESC}${DULL};${FG_MAGENTA}m"
CYAN="${ESC}${DULL};${FG_CYAN}m"
WHITE="${ESC}${DULL};${FG_WHITE}m"
SETCOLOR_SUCCESS=$GREEN
SETCOLOR_FAILURE=$RED
SETCOLOR_NORMAL=$RESET
echo_success() {
$MOVE_TO_COL
printf "["
printf $SETCOLOR_SUCCESS
printf $" OK "
printf $SETCOLOR_NORMAL
printf "]"
printf "\r"
return 0
}
echo_failure() {
$MOVE_TO_COL
printf "["
printf $SETCOLOR_FAILURE
printf $"FAILED"
printf $SETCOLOR_NORMAL
printf "]"
printf "\r"
return 1
}
action() {
local STRING rc
STRING=
printf "$STRING "
shift
"$@" && echo_success $"$STRING" || echo_failure $"$STRING"
rc=$?
echo
return $rc
}
action testing true
action testing false
