bash:"IF command"命令作为条件
一、说明
1、IF的条件部分,可以使用linux“命令”。
1 if command 2 then 3 command if $?=0 4 else 5 command if $?!=0 6 fi
二、代码
1 [root@rocky shell]# cat if_command 2 #!/usr/bin/env bash 3 4 5 # file_name = if_command 6 7 8 run() 9 { 10 if $@ 11 then 12 echo "os_running: ${@}" 13 fi 14 } 15 16 17 list() 18 { 19 if ls -lh # command as condition of if 20 then 21 echo 22 fi 23 } 24 25 26 27 28 run $@ 29 30 list 31 32 33 [root@rocky shell]# 34 [root@rocky shell]#
三、运行
1 [root@rocky shell]# cat if_command 2 #!/usr/bin/env bash 3 4 5 # file_name = if_command 6 7 8 run() 9 { 10 if $@ 11 then 12 echo "os_running: ${@}" 13 fi 14 } 15 16 17 list() 18 { 19 if ls -lh # command as condition of if 20 then 21 echo 22 fi 23 } 24 25 26 27 28 run $@ 29 30 list 31 32 33 [root@rocky shell]# 34 [root@rocky shell]# 35 [root@rocky shell]# ls 36 if_command 37 [root@rocky shell]# 38 [root@rocky shell]# 39 [root@rocky shell]# ./if_command "mkdir big" 40 os_running: mkdir big 41 total 4.0K 42 drwxr-xr-x 2 root root 6 Jan 29 00:01 big 43 -rwx--x--x 1 root root 192 Jan 28 23:59 if_command 44 45 [root@rocky shell]# 46 [root@rocky shell]# 47 [root@rocky shell]# ls 48 big if_command 49 [root@rocky shell]# 50 [root@rocky shell]# 51 [root@rocky shell]# rm -rf big 52 [root@rocky shell]# 53 [root@rocky shell]# 54 [root@rocky shell]# ls 55 if_command 56 [root@rocky shell]# 57 [root@rocky shell]#
四、参考资料
1、 Bash - Conditional structures if and case: https://docs.rockylinux.org/books/learning_bash/06-conditional-structures/
标签:shell,rocky,命令,command,ls,root,bash From: https://www.cnblogs.com/lnlidawei/p/17071564.html