Question

我有点像Bash新手（就脚本而言）并想知道错误检查的首选方法。我正在编写一个构建脚本，它经历了许多命令，如果任何命令以0以外的任何其他命令退出，我希望脚本停止。除了在每个命令之后检查响应代码之外，是否存在“通用”方式如果任何东西返回非0，退出脚本？谢谢！

Answer 1

在脚本开头使用set -e。

在命令失败后，它将停止脚本运行，并且将转发错误代码。

来自bash文档：

  -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.

Bash脚本错误检查

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