*) &server_sockaddr, len); if (rc == -1){ printf("BIND ERROR: %d\n", sock_errno()); close(server_sock); exit(1); } /***/ /* Listen for any client sockets */ /***/ rc = listen(server_sock, backlog); if (rc == -1){ printf("LISTEN ERROR: %d\n", sock_errno())...
$ if Ret ur n Begi n an i f statement. > Ct r l + c $ ### # ### # # ### 注释 Bourne、Korn 和 POSIX shell 支持交互式多行命令。如果 shell 需要使用者键入更多的内 容来完成命令,那么当你按了回车键后,就会出现二级提示符“〉”。有些命令要求有配套的 结束命令,有些字符要求相应的结...
This statement tells the compiler to include all definitions in the file “stdio.h” in the file “x.c”. To resolve “stdio.h”, the compiler needs a context in which to resolve it. For this purpose, the compiler consults another variable (typically passed as an argument when invoking ...
if "%VAR%" == "after" @echo If you see this, it worked ) would never display the message, since the %VAR% in BOTH IF statementsis substituted when the first IF statement is read, since it logicallyincludes the body of the IF, which is a compound statement. So theIF inside the co...
To use exit codes in scripts an if statement can be used to see if an operation was successful.#!/bin/bash cat file.txt if [ $? -eq 0 ] then echo "The script ran ok" exit 0 else echo "The script failed" >&2 exit 1 fi ...
Unix Case Esac Statement - Learn how to use the case esac statement in Unix for effective conditional processing. Explore syntax and examples to enhance your scripting skills.
The if...else statement The case...esac statement Control statements are used to indicate how the control is transferred during the program execution. These actually specify the sequence of the instructions to be executed in a program. Also, these control structures help in decis...
NAME | SYNOPSIS | DESCRIPTION | ERRORS | VERSIONS | NOTES | BUGS | EXAMPLES | SEE ALSO | COLOPHON ...
use a semicolon as a statement separator. 相反,||这个符号表明,只有前一条命令执行不成功(产生了一个非零的退出码)时,才执行后面的脚本。 在一个脚本里,可以用反斜线把一条命令分成多行来写,从而把出错处理代码和命令管道的其他部分区分开来。
Uses theclose()function to close the file. (9) Uses theunlink()function to remove the link to the file. Note:By using the code examples, you agree to the terms of theCode license and disclaimer information. Example in ILE C: Using the integrated file system ...