在Bash 脚本中,return和exit都可以用来结束函数的执行,但它们之间存在一些重要的区别: 基础概念 return:用于从函数中返回一个值,并结束该函数的执行。它只会影响当前函数的执行流程,不会影响脚本的其他部分。 exit:用于终止整个脚本的执行。当调用exit时,脚本会立即停止执行,所有的后续命令都不会被执行。
可以指定退出状态n，n的取值范围是0-255，一般情况下，0表示正常退出，非零表示异常退出。如果状态码是...
Bash Script Returns with Different Return Codes on Exit Before moving out to the methods, let’s take a look at the exit codes that have specific meanings: How to Get Return Codes on Exit? You only need to write the “echo $?” command to get the return code. For example, you want ...
3. The return Command To exit from a sourced script, we’ll need a return command instead of the exit command: #!/bin/bash ps -f return echo We should not see this Copy If we source the script, we’ll get the same result as the version of the script with just the ps command: ...
500+ DevOps Bash Scripts - AWS, GCP, Kubernetes, Kafka, Docker, APIs, Hadoop, SQL, PostgreSQL, MySQL, Hive, Impala, Travis CI, Jenkins, Concourse, GitHub, GitLab, BitBucket, Azure DevOps, Spotify, MP3, LDAP, Code/Build Linting, package management for Linux, Mac, Python, Perl, Ruby,...
[me@linux ~]$ fn() { false; }; fn ; echo "fn exit code is $?" ERR trap from MAIN context. fn exit code is 1 [me@linux ~]$ fn() { false; true; }; fn ; echo "fn exit code is $?" fn exit code is 0 [me@linux ~]$ set -o errtrace [me@linux ~]$ fn() { ...
use the newly-installed version if [ "${locally_resolved_nvm_version}" = 'N/A' ]; then nvm install "${nvm_version}"; elif [ "$(nvm current)" != "${locally_resolved_nvm_version}" ]; then nvm use "${nvm_version}"; fi fi } alias cd='cdnvm' cdnvm "$PWD" || exitThis...
To re-run a command from the history list simply type ! followed by the number of the command. For example to re-run the command number 9 in the list. Ctrl+R sometimes,the ctrl+r may more useful and powerful.
return *(char*)&i != '\x1';}// exit program with exit code exitStatus before printing msg to stderrvoid quit(char* msg, int exitStatus) { fprintf(stderr, "%s", msg); exit(exitStatus);}// convert a raw integer which is read from FLV file to which endian current system fitsint...
Return is a bash builtin function that causes to update the exit status specified by n. Return is intended to be used only for signaling errors, not for returning the results of function. If used: inside a function. Return value specified by n.