1# Shell Command Programming Example<a name="EN-US_TOPIC_0000001134006246"></a> 2 3- [Example Description](#section87143612316) 4- [Static Registration](#section1660495712314) 5- [Static Registration Programming Example](#section1233411684113) 6- [Dynamic Registration](#section6804126192412) 7- [Dynamic Registration Programming Example](#section2335121613418) 8 9## Example Description<a name="section87143612316"></a> 10 11This section describes how to add a shell command **test** using static registration and dynamic registration, respectively. 12 13## Static Registration<a name="section1660495712314"></a> 14 15Development process: 16 171. Define the **cmd\_test** function to be called to add a command. 18 192. Use the **SHELLCMD\_ENTRY** function to add the new command. 20 213. Add a parameter to the **liteos\_tables\_ldflags.mk** link options for linking to the new command. 22 234. Recompile the code and run it. 24 25 26## Static Registration Programming Example<a name="section1233411684113"></a> 27 281. Define the **cmd\_test** function to be called to add a command. 29 30 ``` 31 #include "shell.h" 32 #include "shcmd.h" 33 int cmd_test(void) 34 { 35 printf("hello everybody!\n"); 36 return 0; 37 } 38 ``` 39 402. Add the new command. 41 42 ``` 43 SHELLCMD_ENTRY(test_shellcmd, CMD_TYPE_EX, "test", 0, (CMD_CBK_FUNC)cmd_test); 44 ``` 45 463. Add a parameter to the link options for linking to the new command. 47 48 Add **-utest\_shellcmd** to the **LITEOS\_TABLES\_LDFLAGS** option in the **liteos\_tables\_ldflags.mk** file. 49 504. Recompile the code. 51 52 ``` 53 make clean;make 54 ``` 55 565. Run the **help** command to view all the commands registered in the system. 57 58 The command output contains the **test** command \(the following command output is for reference only.\) 59 60 ``` 61 OHOS # help 62 *******************shell commands:************************* 63 64 arp cat cd chgrp chmod chown cp cpup 65 date dhclient dmesg dns format free help hwi 66 ifconfig ipdebug kill log ls lsfd memcheck mkdir 67 mount netstat oom partinfo partition ping ping6 pwd 68 reset rm rmdir sem statfs su swtmr sync 69 tftp touch umount uname test systeminfo task telnet 70 watch writeproc 71 ``` 72 73 74## Dynamic Registration<a name="section6804126192412"></a> 75 76Development process: 77 781. Use the **osCmdReg** function to add a new command. 79 802. Recompile the code and run it. 81 82 83## Dynamic Registration Programming Example<a name="section2335121613418"></a> 84 851. Call the **osCmdReg** function from the **app\_init** function to dynamically register the command. 86 87 ``` 88 #include "shell.h" 89 #include "shcmd.h" 90 int cmd_test(void) 91 { 92 printf("hello everybody!\n"); 93 return 0; 94 } 95 void app_init(void) 96 { 97 .... 98 .... 99 osCmdReg(CMD_TYPE_EX, "test", 0,(CMD_CBK_FUNC)cmd_test); 100 .... 101 } 102 ``` 103 1042. Recompile the code. 105 106 ``` 107 make clean;make 108 ``` 109 1103. Run the **help** command to view all the commands registered in the system. 111 112 The command output contains the **test** command. 113 114 ``` 115 OHOS # help 116 *******************shell commands:************************* 117 118 arp cat cd chgrp chmod chown cp cpup 119 date dhclient dmesg dns format free help hwi 120 ifconfig ipdebug kill log ls lsfd memcheck mkdir 121 mount netstat oom partinfo partition ping ping6 pwd 122 reset rm rmdir sem statfs su swtmr sync 123 tftp touch umount uname test systeminfo task telnet 124 watch writeproc 125 ``` 126 127 128