我需要帮助将系统命令的输出(stdin和stdout)发送到bash函数,同时仍然接受来自参数的输入。类似于下面的示例。谁能给我指一条正确的路?
LogMsg()
{
DateTime=`date "+%Y/%m/%d %H:%M:%S"`
echo '*****'$DateTime' ('$QMAKESPEC'): '$1 >> "$LogFile"
echo $DateTime' ('$QMAKESPEC'): '$1
}
# Already works
LogMsg "This statement is sent directly"
# Wish I could do this:
# Capture both stdout & stderr of a system function to the logfile
# I do not presume that any of the syntax that follows is good
make 2>&1 >(LogMsg)
发布于 2018-07-27 08:49:04
这是一条旧的线..但我使用它来帮助我编写一个日志函数,该函数还将输出多行命令输出:
# Defines function to grab a time stamp #
get_Time () { Time=$(date +%Y-%m-%d\ %H:%M:%S) ; }
write_Log()
{
get_Time
if [ -n "${1}" ]; then # If it's from a "<message>" then set it
IN="${1}"
echo "${Time} ${IN}" | tee -a ${log_File}
else
while read IN # If it is output from command then loop it
do
echo "${Time} ${IN}" | tee -a ${log_File}
done
fi
}
发布于 2020-04-27 09:11:06
基于前面的回答,我整理了一些通用函数,可以使用日志文件,也可以不使用日志文件,如本文末尾所列。对于更复杂的脚本来说,它们很方便。我通常将终端窗口消息打印到stderr
,以便不会干扰可能需要重定向的合法程序输出。这些函数可以按如下方式调用:
scriptFolder=$(cd $(dirname "$0") && pwd)
scriptName=$(basename $scriptFolder)
# Start a log file that will be used by the logging functions
logFileStart ${scriptName} "${scriptFolder)/${scriptName}.log"
# The following logs the message string passed to the function.
# - use a space for empty lines because otherwise the logging function
# will hang waiting for input
logInfo " "
logInfo "Starting to do some work."
# The following will log each 'stdout` and `stderr` line piped to the function.
someOtherProgram 2>&1 | logInfo
函数...
# Echo to stderr
echoStderr() {
# - if necessary, quote the string to be printed
# - redirect stdout from echo to stderr
echo "$@" 1>&2
# Or, use an alternate echo such one that colors textT
# ${echo2} "$@" 1>&2
}
# Print a DEBUG message
# - prints to stderr and optionally appends to log file if ${logFile} is defined globally
# - see logFileStart() to start a log file
# - call with parameters or pipe stdout and stderr to this function: 2>&1 | logDebug
# - print empty lines with a space " " to avoid hanging the program waiting on stdin input
logDebug() {
if [ -n "${1}" ]; then
if [ -n "${logFile}" ]; then
# Are using a log file
echoStderr "[DEBUG] $@" 2>&1 | tee --append $logFile
else
# Are NOT using a log file
echoStderr "[DEBUG] $@"
fi
else
while read inputLine; do
if [ -n "${logFile}" ]; then
# Are using a log file
echoStderr "[DEBUG] ${inputLine}" 2>&1 | tee --append $logFile
else
# Are NOT using a log file
echoStderr "[DEBUG] ${inputLine}"
fi
done
fi
}
# Print an ERROR message
# - prints to stderr and optionally appends to log file if ${logFile} is defined globally
# - see logFileStart() to start a log file
# - call with parameters or pipe stdout and stderr to this function: 2>&1 | logError
# - print empty lines with a space " " to avoid hanging the program waiting on stdin input
logError() {
if [ -n "${1}" ]; then
if [ -n "${logFile}" ]; then
# Are using a log file
echoStderr "[ERROR] $@" 2>&1 | tee --append $logFile
else
# Are NOT using a log file
echoStderr "[ERROR] $@"
fi
else
while read inputLine; do
if [ -n "${logFile}" ]; then
# Are using a log file
echoStderr "[ERROR] ${inputLine}" 2>&1 | tee --append $logFile
else
# Are NOT using a log file
echoStderr "[ERROR] ${inputLine}"
fi
done
fi
}
# Start a new logfile
# - name of program that is being run is the first argument
# - path to the logfile is the second argument
# - echo a line to the log file to (re)start
# - subsequent writes to the file using log*() functions will append
# - the global variable ${logFile} will be set for use by log*() functions
logFileStart() {
local newLogFile now programBeingLogged
programBeingLogged=$1
# Set the global logfile, in case it was not saved
if [ -n "${2}" ]; then
logFile=${2}
else
# Set the logFile to stderr if not specified, so it is handled somehow
logFile=/dev/stderr
fi
now=$(date '+%Y-%m-%d %H:%M:%S')
# Can't use logInfo because it only appends and want to restart the file
echo "Log file for ${programBeingLogged} started at ${now}" > ${logFile}
}
# Print an INFO message
# - prints to stderr and optionally appends to log file if ${logFile} is defined globally
# - see logFileStart() to start a log file
# - call with parameters or pipe stdout and stderr to this function: 2>&1 | logInfo
# - print empty lines with a space " " to avoid hanging the program waiting on stdin input
logInfo() {
if [ -n "${1}" ]; then
if [ -n "${logFile}" ]; then
# Are using a log file
echoStderr "[INFO] $@" 2>&1 | tee --append $logFile
else
# Are NOT using a log file
echoStderr "[INFO] $@"
fi
else
while read inputLine; do
if [ -n "${logFile}" ]; then
# Are using a log file
echoStderr "[INFO] ${inputLine}" 2>&1 | tee --append $logFile
else
# Are NOT using a log file
echoStderr "[INFO] ${inputLine}"
fi
done
fi
}
# Print an WARNING message
# - prints to stderr and optionally appends to log file if ${logFile} is defined globally
# - see logFileStart() to start a log file
# - call with parameters or pipe stdout and stderr to this function: 2>&1 | logWarning
# - print empty lines with a space " " to avoid hanging the program waiting on stdin input
logWarning() {
if [ -n "${1}" ]; then
if [ -n "${logFile}" ]; then
# Are using a log file
echoStderr "[WARNING] $@" 2>&1 | tee --append $logFile
else
# Are NOT using a log file
echoStderr "[WARNING] $@"
fi
else
while read inputLine; do
if [ -n "${logFile}" ]; then
# Are using a log file
echoStderr "[WARNING] ${inputLine}" 2>&1 | tee --append $logFile
else
# Are NOT using a log file
echoStderr "[WARNING] ${inputLine}"
fi
done
fi
}
发布于 2019-10-15 09:40:18
感谢那些张贴回复的人。我想出了我的版本,将添加时间戳每条消息一次。
#!/bin/bash
CURRENT_PID=$$
PROCESS_NAME=$(basename $0)
LOGFILE=/var/log/backup-monitor.log
function log_message {
if [ -n "$1" ]; then
MESSAGE="$1"
echo -e "$(date -Iseconds)\t$PROCESS_NAME\t$CURRENT_PID\t$MESSAGE" | tee -a $LOGFILE
else
MESSAGE=$(tee)
echo -e "$(date -Iseconds)\t$PROCESS_NAME\t$CURRENT_PID\t$MESSAGE" | tee -a $LOGFILE
fi
}
log_message "Direct arguments are working!!"
echo "stdin also working" | log_message
https://stackoverflow.com/questions/11904907
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