execute command in perl: system Example: #!/home/utils/perl-5.22/5.22.0-005/bin/perl use warnings; my $golden_cl=123; system("echo \"GC=$golden_cl\"");
Perl 的 system 函数用于执行外部命令或程序,并等待其完成。该函数可以捕获被调用程序的退出状态(也称为返回码),但不能直接捕获其输出。如果你需要捕获外部命令的输出,应该使用反引号(`command`)、qx// 或打开管道。 语法 $status = system($command, $arg1, $arg2, ...); $status = system($command); ...
Linux is an open-source operating system that provides a command-line interface to execute various commands. Perl, on the other hand, is a high-level programming language that is often used for automation and text processing tasks. In this article, we will discuss some commonly used Perl comma...
According to Perl documentation (search for "system PROGRAM LIST"): The return value is the exit status of the program as returned by the wait call. To get the actual exit value shift right by eight.if ($? == -1) {print "failed to execute: $!\n";}...
@args = (“command”, “arg1″, “arg2″); system(@args) == 0 or die “system @args failed: $?” 当然,你也可以用类似于下面的语句来检查出错的原因: if ($? == -1) { print “failed to execute: $!\n”; } elsif ($? & 127) { ...
1)对于system这个函数来说,它会返回执行后的状态,比如说 @args = (“command”,“arg1″,“arg2″); system(@args) == 0 or die“system @args failed: $?” 当然,你也可以用类似于下面的语句来检查出错的原因: if ($? == -1) { print“failed to execute: $!\n”; } elsif ($? & 127) ...
1. 使用系统命令(system): Perl的system函数可以在Perl脚本中执行任意的外部命令,包括Linux命令。使用system函数的语法如下: system(“command”); 其中,command是要执行的Linux命令。下面是一个示例,演示如何使用system函数在Perl中执行Linux命令ls,列出当前目录下的文件: ...
1)对于system这个函数来说,它会返回执行后的状态,比如说 @args=(?command?,?arg1″,?arg2″);system(@args)==0ordie?system@argsfailed:$? 当然,你也可以用类似于下面的语句来检查出错的原因: if($?==-1){print?failedtoexecute:$!\n?;}elsif($?&127){printf?childdiedwithsignal%d,%scoredump\n?
1)对于system这个函数来说,它会返回执行后的状态,比如说 @args=(“command”,“arg1″,“arg2″); system(@args)==0 ordie“system@argsfailed:$?” 当然,你也可以用类似于下面的语句来检查出错的原因: if($?==-1){ print“failedtoexecute:$!\n”; ...
When under the "use filetest 'access'" the above-mentioned filetests test whether the permission can (not) be granted using the access(2) family of system calls. Also note that the "-x" and "-X" may under this pragma return true even if there are no execute permission bits set (...