From: Ingo Weinhold Date: Tue, 30 Nov 2004 15:38:32 +0000 (+0000) Subject: [perl #32717] BeOS specific Updates X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=dbc1d98621f53e4a3938cf011ae90a189e72f69f;hp=acd8d558460f297a79cf62ccca790c90790f8058;p=p5sagit%2Fp5-mst-13.2.git [perl #32717] BeOS specific Updates From: Ingo Weinhold (via RT) Message-ID: p4raw-id: //depot/perl@23584 --- diff --git a/beos/beos.c b/beos/beos.c index 7e799ca..4b5d992 100644 --- a/beos/beos.c +++ b/beos/beos.c @@ -1,9 +1,24 @@ #include "beos/beosish.h" +#include "beos/beos_flock_server.h" #undef waitpid +#undef close +#undef kill +#include +#include +#include +#include +#include #include +#include + +/* We cache, for which FDs we got a lock. This will especially speed up close(), + since we won't have to contact the server. */ +#define FLOCK_TABLE_SIZE 256 +static int flockTable[FLOCK_TABLE_SIZE]; + /* In BeOS 5.0 the waitpid() seems to misbehave in that the status * has the upper and lower bytes swapped compared with the usual * POSIX/UNIX implementations. To undo the surpise effect to the @@ -18,3 +33,180 @@ pid_t beos_waitpid(pid_t process_id, int *status_location, int options) { (*status_location & 0xFF00) >> 8; return got; } + +/* The flock() emulation worker function. */ + +static status_t beos_flock(int fd, int operation) { + static int serverPortInitialized = 0; + static port_id serverPort = -1; + + struct stat st; + int blocking; + port_id replyPort; + sem_id lockSem = -1; + status_t error; + flock_server_request request; + flock_server_reply *reply = NULL; + + if (fd < 0) + return B_BAD_VALUE; + + blocking = !(operation & LOCK_NB); + operation &= LOCK_SH | LOCK_EX | LOCK_UN; + + /* don't try to unlock something that isn't locked */ + if (operation == LOCK_UN && fd < FLOCK_TABLE_SIZE && !flockTable[fd]) + return B_OK; + + /* if not yet initialized, get the server port */ + if (!serverPortInitialized) { + serverPort = find_port(FLOCK_SERVER_PORT_NAME); + /* bonefish: If the port wasn't present at this point, we could start + * the server. In fact, I tried this and in works, but unfortunately + * it also seems to confuse our pipes (with both load_image() and + * system()). So, we can't help it, the server has to be started + * manually. */ + serverPortInitialized = ~0; + } + if (serverPort < 0) + return B_ERROR; + + /* stat() the file to get the node_ref */ + if (fstat(fd, &st) < 0) + return errno; + + /* create a reply port */ + replyPort = create_port(1, "flock reply port"); + if (replyPort < 0) + return replyPort; + + /* create a semaphore others will wait on while we own the lock */ + if (operation != LOCK_UN) { + char semName[64]; + sprintf(semName, "flock %ld:%lld\n", st.st_dev, st.st_ino); + lockSem = create_sem(0, semName); + if (lockSem < 0) { + delete_port(replyPort); + return lockSem; + } + } + + /* prepare the request */ + request.replyPort = replyPort; + request.lockSem = lockSem; + request.device = st.st_dev; + request.node = st.st_ino; + request.fd = fd; + request.operation = operation; + request.blocking = blocking; + + /* We ask the server to get us the requested lock for the file. + * The server returns semaphores for all existing locks (or will exist + * before it's our turn) that prevent us from getting the lock just now. + * We block on them one after the other and after that officially own the + * lock. If we told the server that we don't want to block, it will send + * an error code, if that is not possible. */ + + /* send the request */ + error = write_port(serverPort, 0, &request, sizeof(request)); + + if (error == B_OK) { + /* get the reply size */ + int replySize = port_buffer_size(replyPort); + if (replySize < 0) + error = replySize; + + /* allocate reply buffer */ + if (error == B_OK) { + reply = (flock_server_reply*)malloc(replySize); + if (!reply) + error = B_NO_MEMORY; + } + + /* read the reply */ + if (error == B_OK) { + int32 code; + ssize_t bytesRead = read_port(replyPort, &code, reply, replySize); + if (bytesRead < 0) { + error = bytesRead; + } else if (bytesRead != replySize) { + error = B_ERROR; + } + } + } + + /* get the error returned by the server */ + if (error == B_OK) + error = reply->error; + + /* wait for all lockers before us */ + if (error == B_OK) { + int i; + for (i = 0; i < reply->semaphoreCount; i++) + while (acquire_sem(reply->semaphores[i]) == B_INTERRUPTED); + } + + /* free the reply buffer */ + free(reply); + + /* delete the reply port */ + delete_port(replyPort); + + /* on failure delete the semaphore */ + if (error != B_OK) + delete_sem(lockSem); + + /* update the entry in the flock table */ + if (error == B_OK && fd < FLOCK_TABLE_SIZE) { + if (operation == LOCK_UN) + flockTable[fd] = 0; + else + flockTable[fd] = 1; + } + + return error; +} + +/* We implement flock() using a server. It is not really compliant with, since + * it would be very hard to track dup()ed FDs and those cloned as side-effect + * of fork(). Our locks are bound to the process (team) and a particular FD. + * I.e. a lock acquired by a team using a FD can only be unlocked by the same + * team using exactly the same FD (no other one pointing to the same file, not + * even when dup()ed from the original one). close()ing the FD releases the + * lock (that's why we need to override close()). On termination of the team + * all locks owned by the team will automatically be released. */ + +int flock(int fd, int operation) { + status_t error = beos_flock(fd, operation); + return (error == B_OK ? 0 : (errno = error, -1)); +} + +/* We need to override close() to release a potential lock on the FD. See + flock() for details */ + +int beos_close(int fd) { + flock(fd, LOCK_UN); + + return close(fd); +} + + +/* BeOS kill() doesn't like the combination of the pseudo-signal 0 and + * specifying a process group (i.e. pid < -1 || pid == 0). We work around + * by changing pid to the respective process group leader. That should work + * well enough in most cases. */ + +int beos_kill(pid_t pid, int sig) +{ + if (sig == 0) { + if (pid == 0) { + /* it's our process group */ + pid = getpgrp(); + } else if (pid < -1) { + /* just address the process group leader */ + pid = -pid; + } + } + + return kill(pid, sig); +} diff --git a/beos/beos_flock_server.cpp b/beos/beos_flock_server.cpp new file mode 100644 index 0000000..e075ce8 --- /dev/null +++ b/beos/beos_flock_server.cpp @@ -0,0 +1,397 @@ +/* Server required for the flock() emulation under BeOS. */ +#include +#include +#include + +#include + +#include "beos_flock_server.h" + +/* debugging... */ +//#define PRINT(x) { printf x; } +#define PRINT(x) ; + +/* flock() operation flags */ +#define LOCK_SH (0x00) +#define LOCK_EX (0x01) +#define LOCK_UN (0x02) +#define LOCK_NB (0x04) + +enum { + MAX_WAITERS = 1024, + MAX_REPLY_SIZE = sizeof(flock_server_reply) + MAX_WAITERS * sizeof(sem_id) +}; + +/* A node_ref equivalent, so we don't need to link against libbe.so. */ +struct NodeRef { + NodeRef() : device(-1), node(-1) {} + NodeRef(dev_t device, ino_t node) : device(device), node(node) {} + + NodeRef& operator=(const NodeRef& other) + { + device = other.device; + node = other.node; + return *this; + } + + bool operator==(const NodeRef& other) const + { + return (device == other.device && node == other.node); + } + + dev_t device; + ino_t node; +}; + +/* Class representing a (potential) lock. */ +struct FlockEntry { + + FlockEntry(team_id team, sem_id lockSem, int fd, bool shared) + : team(team), + lockSem(lockSem), + fd(fd), + shared(shared), + next(NULL) + { + } + + ~FlockEntry() + { + if (lockSem >= 0) + delete_sem(lockSem); + } + + team_id team; + sem_id lockSem; + int fd; + bool shared; + + FlockEntry *next; +}; + +struct NodeRefHash +{ + size_t operator()(const NodeRef &nodeRef) const + { + uint32 hash = nodeRef.device; + hash = hash * 17 + (uint32)nodeRef.node; + hash = hash * 17 + (uint32)(nodeRef.node >> 32); + return hash; + } +}; + +typedef hash_map FlockEntryMap; +static FlockEntryMap sFlockEntries; + + +static status_t remove_lock(team_id team, flock_server_request &request, + flock_server_reply &reply); + +static void put_flock_entry(const NodeRef &nodeRef, FlockEntry *entry) +{ + sFlockEntries[nodeRef] = entry; +} + +static void remove_flock_entry(const NodeRef &nodeRef) +{ + sFlockEntries.erase(nodeRef); +} + + +static FlockEntry *get_flock_entry(const NodeRef &nodeRef) +{ + FlockEntryMap::iterator it = sFlockEntries.find(nodeRef); + if (it == sFlockEntries.end()) + return NULL; + FlockEntry *entry = it->second; + + /* remove all entries that are obsolete */ + FlockEntry *firstEntry = entry; + FlockEntry *previousEntry = NULL; + sem_info semInfo; + while (entry) { + if (get_sem_info(entry->lockSem, &semInfo) != B_OK) { + FlockEntry *oldEntry = entry; + entry = entry->next; + if (previousEntry) + previousEntry->next = oldEntry->next; + else + firstEntry = entry; + delete oldEntry; + } else { + previousEntry = entry; + entry = entry->next; + } + } + if (firstEntry) + put_flock_entry(nodeRef, firstEntry); + else + remove_flock_entry(nodeRef); + + return firstEntry; +} + +static FlockEntry *find_flock_entry(FlockEntry *entry, team_id team, int fd, + FlockEntry **_previousEntry = NULL) +{ + FlockEntry *previousEntry = NULL; + while (entry) { + if (entry->team == team && entry->fd == fd) { + /* found it */ + if (_previousEntry) + *_previousEntry = previousEntry; + return entry; + } + + previousEntry = entry; + entry = entry->next; + } + return entry; +} + +static status_t add_lock(team_id team, flock_server_request &request, + flock_server_reply &reply) +{ + bool shared = (request.operation == LOCK_SH); + + PRINT(("add_lock(): shared: %d, blocking: %d, file: (%ld, %lld), " + "team: %ld, fd: %d\n", shared, request.blocking, request.device, + request.node, team, request.fd)); + + // get the flock entry list + NodeRef nodeRef(request.device, request.node); + + FlockEntry *entry = get_flock_entry(nodeRef); + + reply.semaphoreCount = 0; + + /* special case: the caller already has the lock */ + if (entry && entry->team == team && entry->fd == request.fd) { + if (shared == entry->shared) + return B_OK; + + FlockEntry *nextEntry = entry->next; + if (!nextEntry) { + /* noone is waiting: just relabel the entry */ + entry->shared = shared; + delete_sem(request.lockSem); /* re-use the old semaphore */ + return B_OK; + } else if (shared) { + /* downgrade to shared lock: this is simple, if only share or + * exclusive lockers were waiting, but in mixed case we can + * neither just replace the semaphore nor just relabel the entry, + * but if mixed we have to surrender the exclusive lock and apply + * for a new one */ + + /* check, if there are only exclusive lockers waiting */ + FlockEntry *waiting = nextEntry; + bool onlyExclusiveWaiters = true; + while (waiting && onlyExclusiveWaiters) { + onlyExclusiveWaiters &= !waiting->shared; + waiting = waiting->next; + } + + if (onlyExclusiveWaiters) { + /* just relabel the entry */ + entry->shared = shared; + delete_sem(request.lockSem); /* re-use the old semaphore */ + return B_OK; + } + + /* check, if there are only shared lockers waiting */ + waiting = nextEntry; + bool onlySharedWaiters = true; + while (waiting && onlySharedWaiters) { + onlySharedWaiters &= waiting->shared; + waiting = waiting->next; + } + + if (onlySharedWaiters) { + /* replace the semaphore */ + delete_sem(entry->lockSem); + entry->lockSem = request.lockSem; + entry->shared = shared; + return B_OK; + } + + /* mixed waiters: fall through... */ + } else { + /* upgrade to exclusive lock: fall through... */ + } + + /* surrender the lock and re-lock */ + if (!request.blocking) + return B_WOULD_BLOCK; + flock_server_reply dummyReply; + remove_lock(team, request, dummyReply); + entry = nextEntry; + + /* fall through... */ + } + + /* add the semaphores of the preceding exclusive locks to the reply */ + FlockEntry* lastEntry = entry; + while (entry) { + if (!shared || !entry->shared) { + if (!request.blocking) + return B_WOULD_BLOCK; + + reply.semaphores[reply.semaphoreCount++] = entry->lockSem; + } + + lastEntry = entry; + entry = entry->next; + } + + /* create a flock entry and add it */ + FlockEntry *newEntry = new FlockEntry(team, request.lockSem, request.fd, + shared); + if (lastEntry) + lastEntry->next = newEntry; + else + put_flock_entry(nodeRef, newEntry); + + return B_OK; +} + +static status_t remove_lock(team_id team, flock_server_request &request, + flock_server_reply &reply) +{ + // get the flock entry list + NodeRef nodeRef(request.device, request.node); + + PRINT(("remove_lock(): file: (%ld, %lld), team: %ld, fd: %d\n", + request.device, request.node, team, request.fd)); + + // find the entry to be removed + FlockEntry *previousEntry = NULL; + FlockEntry *entry = find_flock_entry(get_flock_entry(nodeRef), team, + request.fd, &previousEntry); + + if (!entry) + return B_BAD_VALUE; + + /* remove the entry */ + if (previousEntry) { + previousEntry->next = entry->next; + } else { + if (entry->next) { + put_flock_entry(nodeRef, entry->next); + } else { + remove_flock_entry(nodeRef); + } + } + delete entry; + return B_OK; + +} + +int main(int argc, char** argv) { + /* get independent of our creator */ + setpgid(0, 0); + + /* create the request port */ + port_id requestPort = create_port(10, FLOCK_SERVER_PORT_NAME); + if (requestPort < 0) { + fprintf(stderr, "Failed to create request port: %s\n", + strerror(requestPort)); + exit(1); + } + + /* Check whether we are the first instance of the server. We do this by + * iterating through all teams and check, whether another team has a + * port with the respective port name. */ + { + /* get our team ID */ + thread_info threadInfo; + get_thread_info(find_thread(NULL), &threadInfo); + team_id thisTeam = threadInfo.team; + + /* iterate through all existing teams */ + int32 teamCookie = 0; + team_info teamInfo; + while (get_next_team_info(&teamCookie, &teamInfo) == B_OK) { + /* skip our own team */ + team_id team = teamInfo.team; + if (team == thisTeam) + continue; + + /* iterate through the team's ports */ + int32 portCookie = 0; + port_info portInfo; + while (get_next_port_info(team, &portCookie, &portInfo) == B_OK) { + if (strcmp(portInfo.name, FLOCK_SERVER_PORT_NAME) == 0) { + fprintf(stderr, "There's already a flock server running: " + "team: %ld\n", team); + delete_port(requestPort); + exit(1); + } + } + } + + /* Our creator might have supplied a semaphore we shall delete, when + * we're initialized. Note that this is still supported here, but + * due to problems with pipes the server is no longer started from + * our flock() in libperl.so, so it is not really used anymore. */ + if (argc >= 2) { + sem_id creatorSem = (argc >= 2 ? atol(argv[1]) : -1); + + /* check whether the semaphore really exists and belongs to our team + (our creator has transferred it to us) */ + sem_info semInfo; + if (creatorSem > 0 && get_sem_info(creatorSem, &semInfo) == B_OK + && semInfo.team == thisTeam) { + delete_sem(creatorSem); + } + } + } + + /* main request handling loop */ + while (true) { + /* read the request */ + flock_server_request request; + int32 code; + ssize_t bytesRead = read_port(requestPort, &code, &request, + sizeof(request)); + if (bytesRead != (int32)sizeof(request)) + continue; + + /* get the team */ + port_info portInfo; + if (get_port_info(request.replyPort, &portInfo) != B_OK) + continue; + team_id team = portInfo.team; + + char replyBuffer[MAX_REPLY_SIZE]; + flock_server_reply &reply = *(flock_server_reply*)replyBuffer; + + /* handle the request */ + status_t error = B_ERROR; + switch (request.operation) { + case LOCK_SH: + case LOCK_EX: + error = add_lock(team, request, reply); + break; + case LOCK_UN: + error = remove_lock(team, request, reply); + break; + } + + if (error == B_OK) { + PRINT((" -> successful\n")); + } else { + PRINT((" -> failed: %s\n", strerror(error))); + } + + /* prepare the reply */ + reply.error = error; + int32 replySize = sizeof(flock_server_reply); + if (error == B_OK) + replySize += reply.semaphoreCount * sizeof(sem_id) ; + + /* send the reply */ + write_port(request.replyPort, 0, &reply, replySize); + } + + return 0; +} diff --git a/beos/beos_flock_server.h b/beos/beos_flock_server.h new file mode 100644 index 0000000..2fb47e3 --- /dev/null +++ b/beos/beos_flock_server.h @@ -0,0 +1,24 @@ +#ifndef PERL_BEOS_FLOCK_SERVER_H +#define PERL_BEOS_FLOCK_SERVER_H + +#include + +#define FLOCK_SERVER_PORT_NAME "perl flock server" + +typedef struct flock_server_request { + port_id replyPort; + sem_id lockSem; + dev_t device; + ino_t node; + int fd; + int operation; + int blocking; +} flock_server_request; + +typedef struct flock_server_reply { + status_t error; + int semaphoreCount; + sem_id semaphores[1]; +} flock_server_reply; + +#endif diff --git a/beos/beosish.h b/beos/beosish.h index 66de110..d50cc55 100644 --- a/beos/beosish.h +++ b/beos/beosish.h @@ -11,5 +11,24 @@ pid_t beos_waitpid(pid_t process_id, int *status_location, int options); /* This seems to be protoless. */ char *gcvt(double value, int num_digits, char *buffer); + +/* flock() operation flags */ +#define LOCK_SH (0x00) +#define LOCK_EX (0x01) +#define LOCK_UN (0x02) +#define LOCK_NB (0x04) + +int flock(int fd, int operation); + +#undef close +#define close beos_close + +int beos_close(int fd); + + +#undef kill +#define kill beos_kill +int beos_kill(pid_t pid, int sig); + #endif diff --git a/ext/Errno/Errno_pm.PL b/ext/Errno/Errno_pm.PL index a795cfc..de4d549 100644 --- a/ext/Errno/Errno_pm.PL +++ b/ext/Errno/Errno_pm.PL @@ -208,7 +208,7 @@ sub write_errno_pm { close(CPPI); - unless ($^O eq 'MacOS') { # trust what we have + unless ($^O eq 'MacOS' || $^O eq 'beos') { # trust what we have / get later # invoke CPP and read the output if ($^O eq 'VMS') { @@ -248,17 +248,19 @@ sub write_errno_pm { # Many of the E constants (including ENOENT, which is being # used in the Perl test suite a lot), are available only as # enums in BeOS, so compiling and executing some code is about - # only way to find out what the numeric Evalues are. + # only way to find out what the numeric Evalues are. In fact above, we + # didn't even bother to get the values of the ones that have numeric + # values, since we can get all of them here, anyway. if ($^O eq 'beos') { if (open(C, ">errno.c")) { - my @zero = grep { !$err{$_} } keys %err; + my @allerrs = keys %err; print C < #include int main() { EOF - for (@zero) { + for (@allerrs) { print C qq[printf("$_ %d\n", $_);] } print C "}\n"; diff --git a/ext/File/Glob/t/basic.t b/ext/File/Glob/t/basic.t index 00bd7406..fc168b8 100755 --- a/ext/File/Glob/t/basic.t +++ b/ext/File/Glob/t/basic.t @@ -44,7 +44,8 @@ print "ok 2\n"; # look up the user's home directory # should return a list with one item, and not set ERROR -if ($^O ne 'MSWin32' && $^O ne 'NetWare' && $^O ne 'VMS' && $^O ne 'os2') { +if ($^O ne 'MSWin32' && $^O ne 'NetWare' && $^O ne 'VMS' && $^O ne 'os2' + && $^O ne 'beos') { eval { ($name, $home) = (getpwuid($>))[0,7]; 1; diff --git a/hints/beos.sh b/hints/beos.sh index 25b99a1..47e724b 100644 --- a/hints/beos.sh +++ b/hints/beos.sh @@ -39,14 +39,19 @@ d_syserrlst='undef' # large negative numbers really kind of suck in arrays. # Sockets didn't use to be real sockets but BONE changes this. -# How does one test for BONEness? -if [ ! -f /some/bone/file.h ]; then +if [ ! -f /boot/develop/headers/be/bone/sys/socket.h ]; then d_socket='undef' d_gethbyaddr='undef' d_gethbyname='undef' d_getsbyname='undef' + + libs='-lnet' fi +# We provide a flock() emulation. +d_flock='define' +d_flockproto='define' + ld='gcc' export PATH="$PATH:$PWD/beos" @@ -55,8 +60,6 @@ case "$ldlibpthname" in '') ldlibpthname=LIBRARY_PATH ;; esac -# the waitpid() wrapper +# the waitpid() wrapper (among other things) archobjs="beos.o" test -f beos.c || cp beos/beos.c . - - diff --git a/lib/ExtUtils/t/MM_BeOS.t b/lib/ExtUtils/t/MM_BeOS.t index 3161176..6587ced 100644 --- a/lib/ExtUtils/t/MM_BeOS.t +++ b/lib/ExtUtils/t/MM_BeOS.t @@ -15,7 +15,7 @@ use Test::More; BEGIN { if ($^O =~ /beos/i) { - plan tests => 2; + plan tests => 4; } else { plan skip_all => 'This is not BeOS'; } @@ -40,6 +40,7 @@ use File::Basename; require_ok( 'ExtUtils::MM_BeOS' ); +my $MM = bless { NAME => "Foo" }, 'MM'; # init_linker { diff --git a/lib/Tie/File/t/16_handle.t b/lib/Tie/File/t/16_handle.t index 72ff10b..f799496 100644 --- a/lib/Tie/File/t/16_handle.t +++ b/lib/Tie/File/t/16_handle.t @@ -79,7 +79,7 @@ undef $o; untie @a; # (39) Does it correctly detect a non-seekable handle? -{ if ($^O =~ /^(MSWin32|dos|BeOS)$/) { +{ if ($^O =~ /^(MSWin32|dos|beos)$/) { print "ok $N # skipped ($^O has broken pipe semantics)\n"; last; } diff --git a/perl.c b/perl.c index 03187a3..2445fb5 100644 --- a/perl.c +++ b/perl.c @@ -316,8 +316,9 @@ perl_construct(pTHXx) #endif /* Use sysconf(_SC_CLK_TCK) if available, if not - * available or if the sysconf() fails, use the HZ. */ -#if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) + * available or if the sysconf() fails, use the HZ. + * BeOS has those, but returns the wrong value. */ +#if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__) PL_clocktick = sysconf(_SC_CLK_TCK); if (PL_clocktick <= 0) #endif diff --git a/t/op/magic.t b/t/op/magic.t index 1c02b5b..4e73541 100755 --- a/t/op/magic.t +++ b/t/op/magic.t @@ -47,6 +47,7 @@ $Is_Cygwin = $^O eq 'cygwin'; $Is_MacOS = $^O eq 'MacOS'; $Is_MPE = $^O eq 'mpeix'; $Is_miniperl = $ENV{PERL_CORE_MINITEST}; +$Is_BeOS = $^O eq 'beos'; $PERL = ($Is_NetWare ? 'perl' : ($Is_MacOS || $Is_VMS) ? $^X : @@ -249,12 +250,14 @@ EOF ok chmod(0755, $script), $!; $_ = ($Is_MacOS || $Is_VMS) ? `$perl $script` : `$script`; s/\.exe//i if $Is_Dos or $Is_Cygwin or $Is_os2; + s{./$script}{$script} if $Is_BeOS; # revert BeOS execvp() side-effect s{\bminiperl\b}{perl}; # so that test doesn't fail with miniperl s{is perl}{is $perl}; # for systems where $^X is only a basename s{\\}{/}g; ok((($Is_MSWin32 || $Is_os2) ? uc($_) eq uc($s1) : $_ eq $s1), " :$_:!=:$s1:"); $_ = `$perl $script`; s/\.exe//i if $Is_Dos or $Is_os2; + s{./$perl}{$perl} if $Is_BeOS; # revert BeOS execvp() side-effect s{\\}{/}g; ok((($Is_MSWin32 || $Is_os2) ? uc($_) eq uc($s1) : $_ eq $s1), " :$_:!=:$s1: after `$perl $script`"); ok unlink($script), $!;