127 Return code from $?:命令不存在; Exit Status 退出码: If a command is not found, the child process created to execute it returns a status of 127. If a command is found but is not executable, the return status is 126. 比如:试图在 64 位机上 运行 ELF 32 位可执行程序,则报告如下错...
How to Get Return Codes on Exit? You only need to write the “echo $?” command to get the return code. For example, you want to compare two numbers using the following Bash script: Once you execute the script in the terminal, run “echo $?” to get the return code on exit: ./...
The following code determines if the invoking shell was executed from Midnight Commander or is taking input from a pipe: # do not run when inside Midnight Commander or within a Pipe if test -n "$MC_SID" -o ! -t 1 ; then echo $"$1: command not found" return 127 fi And the ...
It’s important to have the errtrace and functrace options enable one way or another as it will make sure the ERR, DEBUG, RETURN traps are inherited by the command substitution, shell functions, and subshells. [me@linux ~]$ trap 'echo "ERR trap from ${FUNCNAME:-MAIN} context."' ERR...
return 1有异常 from gnu: Shell本身是一个用C语言编写的程序 操作系统 用C写成,shell可视为专为C语言服务的meta-language 看最近一条命令的status code: echo $? 0 :成功,true, 顺利跑完 非0:失败,false 1 权限不够? 127 command not found
elif [-x /usr/share/command-not-found/command-not-found ]; then/usr/share/command-not-found/command-not-found --"$1"return$?elseprintf"%s: command not found\n""$1">&2return127fi } fi printf"%-8s %-25s %-4s %s\n"@@@ /etc/bash.bashrc'==>'Closure fi...
return (127); } if (pstatus != PROC_STILL_ALIVE) { if (pstatus > 128) last_command_exit_signal = find_termsig_by_pid (pid); return (pstatus); } siginterrupt (SIGINT, 1); while ((got_pid = WAITPID (pid, &status, 0)) != pid) { CHECK_TERMSIG; CHECK_WAIT_INTR; if (got_...
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# _fb_adb_opt_type_1() { # [REAL CODE GENERATED BELOW] # } #$1 = command #$2 = name of argument #type in $result on success #completion-relevant flag in $result2 #flag _fb_adb_opt_type() { if ! _fb_adb_opt_type_1 "$@"; then return 1 ...
local, logout, popd, printf, pushd, pwd, read, readonly, return, set, shift, shopt, source, suspend, test, times, trap, type, typeset, ulimit, umask, unalias, unset, wait Help cd ---bash内部命令 Ls –help Man ls man cd Info...