Perldoc Search: "$<" perl-5.20.1
search official POD
8 PODs, 20 LINEs found.
276 : >(foo|bar)$< tail~ EXACT <x> (1)
279 : >foo|bar)$< reg
283 : >|bar)$< 31 tail~ OPEN1 (26)
284 : >bar)$< brnc
287 : >)$< 34 tail~ BRANCH (28)
294 : >$< tail~ BRANCH (3)
136 : $<, $>, $( and $) can be set only on machines that support the corresponding *set[re][ug]id()* routine. $( and $) can be swapped only on machines supporting "setregid()".
142 : $< The real uid of this process. You can change both the real uid and the effective uid at the same time by using "POSIX::setuid()". Since changes to $< require a system call, check $! after a change attempt to detect any possible errors.
150 : $< = $>; # set real to effective uid
151 : ($<,$>) = ($>,$<); # swap real and effective uids
155 : $< and $> can be swapped only on machines supporting "setreuid()".
433 : $<*digits*> ($1, $2, ...)
504 : // (getpwuid($<))
1278 : Note the use of $ instead of \ in the last example. Unlike sed, we use the \<*digit*> form in only the left hand side. Anywhere else it's $<*digit*>.
514 : $pwd = (getpwuid($<));
1207 : $login = getlogin || getpwuid($<) || "Kilroy";
345 : Don't assume the Unix user and group semantics: especially, don't expect the $< and $> (or the $( and $)) to work for switching identities (or memberships).
2576 : (F) You tried to assign to $<, and your operating system doesn't support the setruid() system call (or equivalent), or at least Configure didn't think so.
174 : print "UID is $<\n";
36 : * $<*digit*> does not refer to fields--it refers to substrings matched by the last match pattern.