Bash腳本不迎合新行，將文本附加到當前行

我有一個腳本，在運行命令xyz後將stdout重定向到日誌文件。我試着在控制檯這樣做：Bash腳本不迎合新行，將文本附加到當前行

xyz > temp.log &

，當我看着temp.log其完美的，因爲我希望它是。但是，當我在腳本中運行上述命令時，temp.log只是所有stdout中的一大部分。我如何使它從控制檯運行它一樣打印？我已經在下面顯示了日誌。

運行xyz > temp.log &從控制檯

/source_id:int64/(Green-aeon-GlobalMillennium-Spout): 18 
/source_id:int64/(Green-aeon-GlobalMillennium-Spout): 6 
/source_id:int64/(Green-aeon-GlobalMillennium-Spout): 3 
/source_id:int64/(Green-aeon-GlobalMillennium-Spout): 2 
/source_id:int64/(Green-aeon-GlobalMillennium-Spout): 19 
/source_id:int64/(Green-aeon-GlobalMillennium-Spout): 11 
/source_id:int64/(Green-aeon-GlobalMillennium-Spout): 1 
/source_id:int64/(Green-aeon-GlobalMillennium-Spout): 12 
/source_id:int64/(Green-aeon-GlobalMillennium-Spout): 3

從腳本中運行

ESC[?1049hESC[1;48rESC(BESC[mESC[4lESC[?7hESC[HESC[2JEvery 5.0s: Green-aeon-GlobalMillennium-SpoutESC[1;178HTue Feb 12 11:36:08 2013ESC[3;1H/source_id:36/sch_event:1797777 for Green-aeon-GlobalMillennium-Spout at Tue Feb 12 11:16:41 CST 2013^MESC[4d/source_id:36/sch_event:1797779 for Green-aeon-GlobalMillennium-Spout at Tue Feb 12 11:16:41 CST 2013^MESC[5d/source_id:36/sch_event:1797781 for Green-aeon-GlobalMillennium-Spout at Tue Feb 12 11:16:41 CST 2013^MESC[6d/source_id:36/sch_event:1797783 for Green-aeon-GlobalMillennium-Spout at Tue Feb 12 11:16:41 CST 2013^MESC[7d/source_id:36/sch_event:1797785 for Green-aeon-GlobalMillennium-Spout at Tue Feb 12 11:16:41 CST 2013^MESC[8d/source_id:36/sch_event:1797787 for Green-aeon-GlobalMillennium-Spout at Tue Feb 12 11:16:41 CST` 2013^MESC[9d/source_id:36/sch_event:1797789 for Green-aeon-GlobalMillennium-Spout at Tue Feb 12 11:16:41 CST 2013^MESC[10d/source_id:36/sch_event:1797791 for Green-aeon-GlobalMillennium-Spout at Tue Feb 12 11:16:41 CST 2013^MESC

這是腳本

#!/bin/sh 

die() { 
    echo >&2 "[email protected]" 
    exit 1 
} 

[ "$#" -ge 4 ] || die "usage notification_stats <table_name> <listener_name> <time_interval> <time_to_run>" 

echo $3 | grep -E -q '^[0-9]+$' || die "Numeric argument required, $3 provided for time_interval" 
echo $4 | grep -E -q '^[0-9]+$' || die "Numeric argument required, $4 provided for time_to_run" 

watch -n $3 xyz -v $1 $2 > notify.log & 
$my_pid = $! 

sleep $4 
kill -9 $my_pid

來源

2013-02-12 noMAD

你能張貼腳本？ – EJK 2013-02-12 18:01:31

FWIW，這些看起來像ANSI轉義序列。挑戰在於搞清楚輸出它們的是什麼。 – EJK 2013-02-12 18:05:40

@EJK添加腳本 – noMAD 2013-02-12 18:06:44

請勿使用watch。它意味着交互式顯示，而不是重複運行一個程序。

您可以使用

#!/bin/bash 
while ((SECONDS <= $4)) 
do 
    xyz -v $1 $2 
    sleep $3 
done > notify.log

代替

來源

2013-02-12 18:13:57

什麼是SECONDS？這是當前時間的秒數嗎？ – noMAD 2013-02-12 18:37:28

每次引用此參數時，返回自從shell調用返回後的秒數。（來自「男人bash」） – 2013-02-12 18:38:52

Bash腳本不迎合新行，將文本附加到當前行

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