The simplest way to make a bash script exit when an error occurs is by using the'set -e'command at the beginning of your bash script. This command instructs the bash script to stop execution if any command it runs returns a non-zero exit status, which is the convention for indicating ...
#This function is used to cleanly exit any script. It does this displaying a # given error message, and exiting with an error code. function error_exit { echo echo"$@" exit 1 } #Trap the killer signals so that we can exit with a good message. trap"error_exit 'Received signal SIGH...
However, I quickly also discovered a major downside to executing the function in a subshell, specifically that exiting the script from inside a function doesn't work anymore, instead forcing me to work with the return status along the whole call tree (in case of nested functions). This leads...
/bin/bash## Name: test-bucket-1## Purpose:# Performs the test-bucket number 1 for Product X.# (Actually, this is a sample shell script,# which invokes some system commands# to illustrate how to construct a Bash script)## Notes:# 1) The environment variable TEST_VAR must be set# (...
if ! type -p convert &>/dev/null; then printf '%s\n' "error: convert is not installed, exiting..." exit 1 fi使用strftime获取当前日期Bash的printf有一个内置的获取日期的方法,可用来代替date命令。警告: 要求bash版本4+示例函数:date() { # 用法: date "format" # 通过"man strftime"看格式 ...
Bash's exit status is the exit status of the last command executed in the script. If no commands are executed, the exit status is 0. An attempt is first made to open the file in the current directory, and, if no file is found, then the shell searches the directories in PATH for ...
# to illustrate how to construct a Bash script) # # Notes: # 1) The environment variable TEST_VAR must be set # (as an example). # 2) To invoke this shell script and redirect standard # output and standard error to a file (such as ...
The select loop will not terminate until you cancel it or use the break statement to exit the loop in your script. I have used the break statement after my logic flow so the loop will be terminated with just one selection. Thebreakstatement exit out of the loop once it is called so an...
In this run, I have one system down (mac-pro-1-1) and one system without the file (macmini2). You can see that the copy from serverdmaf5works right away, but for the other two, there's a retry for a random time between 1 and 60 seconds before exiting: ...
$ bash script.sh Array elements: aaa bbb ccc ddd First element of the array: aaa Array element indexes: 0 1 2 3 Array length: 4 The last element of the array: ddd Note that the array elements are separated by a space without a comma....