会python真的可以为所欲为0(回)
359天前
这里还有人吗1(回)
544天前这里还有人吗0(回)
544天前
每天面对着电脑屏幕，敲打键盘。我所面对的并不只是代码，而是一种生活方式。0(回)
769天前到处都是羊，不想上班0(回)
849天前
鸽子
0(回)
853天前#----------------------------- |
$status = system ( "vi $myfile" ); |
#----------------------------- |
$status = system ( "vi", $myfile ); |
#----------------------------- |
system ( "cmd1 args | cmd2 | cmd3 >outfile" ); |
system ( "cmd args <infile >outfile 2>errfile" ); |
#----------------------------- |
$status = system ( $program, $arg1, $arg ); |
die "$program exited funny: $?" unless $status == 0; |
#----------------------------- |
if ( ( $signo = system ( @arglist ) ) &= 127 ) |
{ |
die "program killed by signal $signo\n"; |
} |
#----------------------------- |
if ( $pid = fork ) |
{ |
# parent catches INT and berates user |
local $SIG {INT} = sub { print "Tsk tsk, no process interruptus\n" }; |
waitpid ( $pid, 0 ); |
} |
else |
{ |
die "cannot fork: $!" unless defined $pid; |
# child ignores INT and does its thing |
$SIG {INT} = "IGNORE"; |
exec ( "summarize", "/etc/logfiles" ) or die "Can't exec: $!\n"; |
} |
#----------------------------- |
$shell = '/bin/tcsh'; |
system $shell '-csh'; |
# pretend it's a login shell |
#----------------------------- |
system {'/bin/tcsh'} '-csh'; # pretend it's a login shell |
#----------------------------- |
# call expn as vrfy |
system {'/home/tchrist/scripts/expn'} 'vrfy', @ADDRESSES; |
#----------------------------- |
@args = ( "echo surprise" ); |
system @args; |
# subject to shell escapes if @args == 1 |
system { $args[0] } @args; |
# safe even with one-arg list |
#----------------------------- |
