bash - Bash脚本错误检查

Question

我有点像Bash新手(就脚本而言)，想知道错误检查的首选方法。我正在编写一个通过多个命令的构建脚本，并且我希望如果任何一个命令以0以外的其他字符退出时该脚本都将停止。除了检查每个命令后的响应代码之外，还有一种“通用”方式退出脚本是否返回非0的结果？谢谢!

Answer 1

在脚本的开头使用set -e。

命令失败后，它将停止脚本的运行，并且错误代码将被转发。

从bash文档中:

  -e      Exit immediately if a pipeline (which may consist  of  a
          single  simple command),  a subshell command enclosed in
          parentheses, or one of the commands executed as part  of
          a  command  list  enclosed  by braces (see SHELL GRAMMAR
          above) exits with a non-zero status.  The shell does not
          exit  if  the  command that fails is part of the command
          list immediately following a  while  or  until  keyword,
          part  of  the  test  following  the  if or elif reserved
          words, part of any command executed in a && or  ││  list
          except  the  command  following  the final && or ││, any
          command in a pipeline but the last, or if the  command’s
          return  value  is being inverted with !.  A trap on ERR,
          if set, is executed before the shell exits.  This option
          applies to the shell environment and each subshell envi-
          ronment separately (see  COMMAND  EXECUTION  ENVIRONMENT
          above), and may cause subshells to exit before executing
          all the commands in the subshell.