Date: Wed, 12 Apr 2017 19:27:14 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r316739 - head/lib/libc/gen Message-ID: <201704121927.v3CJREU8098655@repo.freebsd.org>
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Author: kib Date: Wed Apr 12 19:27:14 2017 New Revision: 316739 URL: https://svnweb.freebsd.org/changeset/base/316739 Log: Report _SC_SEM_NSEMS_MAX and _SC_SEM_VALUE_MAX which show parameters of the current usermode implementation of the POSIX semaphores. For NSEMS_MAX, return -1 without changing errno, which indicates that the variable has no limit. Before, sysconf(3) returned parameters queried from the ksem(9) legacy implementation, which apparently has low defaults for NSEMS_MAX. Reported and tested by: jbeich Sponsored by: The FreeBSD Foundation MFC after: 1 week Modified: head/lib/libc/gen/sysconf.c Modified: head/lib/libc/gen/sysconf.c ============================================================================== --- head/lib/libc/gen/sysconf.c Wed Apr 12 19:23:41 2017 (r316738) +++ head/lib/libc/gen/sysconf.c Wed Apr 12 19:27:14 2017 (r316739) @@ -48,6 +48,7 @@ __FBSDID("$FreeBSD$"); #include <limits.h> #include <paths.h> #include <pthread.h> /* we just need the limits */ +#include <semaphore.h> #include <time.h> #include <unistd.h> #include "un-namespace.h" @@ -299,13 +300,9 @@ do_NAME_MAX: mib[1] = CTL_P1003_1B_RTSIG_MAX; goto yesno; case _SC_SEM_NSEMS_MAX: - mib[0] = CTL_P1003_1B; - mib[1] = CTL_P1003_1B_SEM_NSEMS_MAX; - goto yesno; + return (-1); case _SC_SEM_VALUE_MAX: - mib[0] = CTL_P1003_1B; - mib[1] = CTL_P1003_1B_SEM_VALUE_MAX; - goto yesno; + return (SEM_VALUE_MAX); case _SC_SIGQUEUE_MAX: mib[0] = CTL_P1003_1B; mib[1] = CTL_P1003_1B_SIGQUEUE_MAX;
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