1. 重定向shell的标准输出或标准错误输出到某临时文件,然后再从临时文件中读出执行结果。 这个办法的好处是可以把标准输出和标准错误输出分开保存! 2. my $res = `ls`; 这种方法很直接,也很想shell 3. open( my $fh, "ls |") or die "$!"; while ( <$fh> ) { print; } 把管道用起来,比较新颖。
How to execute shell command in a perl script? https://stackoverflow.com/questions/3200801/how-can-i-call-a-shell-command-in-my-perl-script/21153038 1. 用`` 不显示执行结果 my $files = `ls -la`— captures the output of the command in$files 2. 用system or exec 不显示执行结果 system...
After the last continue operation, the output gets printed on the stdout as “./perl_debugger.pl” since it matches the pattern “perl”. 10. 从文件获得debug的命令和断点信息 Perl debugger can get the debug command from the file and execute it. For example, create the file called “debug_...
/bin/perl1 eval<<"EOF";2 chdir "joker" || die "Can't cd: $!\n";3 EOF4 print "The error message from die:print "Program $0 still in progress.\n";(Output)4 The error message from die: Can't cd: no such file or directory5 Program ./eval4.p still in progress. 1. 解释 1...
shell_builtins(1) shift(1) showfont(1) showrgb(1) shred(1) shuf(1) shutdown(1B) sitepods(1) size(1) size(1g) sleep(1) sleep(1g) slib(1) sliceprint(1) slrn(1) slrnpull(1) slsh(1) smbcacls(1) smbclient(1) smbcontrol(1) smbcquotas(1) smbget(1) smbprofiles(1) smbstat...
shell scripting heritage makes it great for writingglue code: scripts which link together other scripts and programs. Perl is ideally suited for processing text data and producing more text data. Perl is widespread, popular, highly portable and well-supported. Perl was designed with the philosophy...
tick operator (see the examples below) is one of the ways in which you can access system commands. To use this feature in Perl you just put the command that you want to execute between the backticks -- that's it. This runs the command, then you can easily access the command output....
After the last continue operation, the output gets printed on the stdout as “./perl_debugger.pl” since it matches the pattern “perl”. 10. Get debug commands from the file (source) Perl debugger can get the debug command from the file and execute it. For example, create the file cal...
Note that forward implies an eval { } around the call (actually execute does), thus rendering all exceptions thrown by the called action non-fatal and pushing them onto $c->error instead. If you want die to propagate you need to do something like:...
Once your script has been copied to your server, you will need to get to ashell prompton the machine, usually via SSH. When you have reached the command prompt, you can change into yourhomedirectory by typing the following command: