怎么让一个脚本运行时遇到错误就停止？ - Chinaunix

原帖由 dearvoid 于 2008-8-14 18:14 发表
在你脚本的开始位置加上一句 set -e

   -a allexport
         Flag variables for export when assignments are made to them.

   -b notify
         Enable asynchronous notification of background job completion.
         (UNIMPLEMENTED)

   -C noclobber
         Do not overwrite existing files with ``>''.

   -E emacs
         Enable the built-in emacs(1) command line editor (disables the -V
         option if it has been set).

   -e errexit
         Exit immediately if any untested command fails in non-interactive
         mode.  The exit status of a command is considered to be explic-
         itly tested if the command is part of the list used to control an
         if, elif, while, or until; if the command is the left hand oper-
         and of an ``&&'' or ``||'' operator; or if the command is a pipe-
         line preceded by the ! operator.  If a shell function is executed
         and its exit status is explicitly tested, all commands of the
         function are considered to be tested as well.

   -f noglob
         Disable pathname expansion.

   -I ignoreeof
         Ignore EOF's from input when in interactive mode.

   -i interactive
         Force the shell to behave interactively.

   -m monitor
         Turn on job control (set automatically when interactive).

   -n noexec
         If not interactive, read commands but do not execute them.  This
         is useful for checking the syntax of shell scripts.

   -P physical
         Change the default for the cd and pwd commands from -L (logical
         directory layout) to -P (physical directory layout).

   -p privileged
         Turn on privileged mode.  This mode is enabled on startup if
         either the effective user or group id is not equal to the real
         user or group id.  Turning this mode off sets the effective user
         and group ids to the real user and group ids.  When this mode is
         enabled for interactive shells, the file /etc/suid_profile is
         sourced instead of ~/.profile after /etc/profile is sourced, and
         the contents of the ENV variable are ignored.

   -s stdin
         Read commands from standard input (set automatically if no file
         arguments are present).  This option has no effect when set after
         the shell has already started running (i.e., when set with the
         set command).

   -T trapsasync
         When waiting for a child, execute traps immediately.  If this
         option is not set, traps are executed after the child exits, as
         specified in IEEE Std 1003.2 (``POSIX.2'').  This nonstandard
         option is useful for putting guarding shells around children that
         block signals.  The surrounding shell may kill the child or it
         may just return control to the tty and leave the child alone,
         like this:

               sh -T -c "trap 'exit 1' 2 ; some-blocking-program"

   -u nounset
         Write a message to standard error when attempting to expand a
         variable that is not set, and if the shell is not interactive,
         exit immediately.

   -V vi Enable the built-in vi(1) command line editor (disables -E if it
         has been set).

   -v verbose
         The shell writes its input to standard error as it is read.  Use-
         ful for debugging.

   -x xtrace
         Write each command (preceded by the value of the PS4 variable) to
         standard error before it is executed.  Useful for debugging.

原帖由 wstar 于 2008-8-17 16:47 发表
set -e 好像不太好用啊