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
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=316739
@ -48,6 +48,7 @@ __FBSDID("$FreeBSD$");
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#include <limits.h>
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#include <paths.h>
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#include <pthread.h> /* we just need the limits */
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#include <semaphore.h>
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#include <time.h>
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#include <unistd.h>
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#include "un-namespace.h"
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@ -299,13 +300,9 @@ sysconf(int name)
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mib[1] = CTL_P1003_1B_RTSIG_MAX;
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goto yesno;
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case _SC_SEM_NSEMS_MAX:
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mib[0] = CTL_P1003_1B;
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mib[1] = CTL_P1003_1B_SEM_NSEMS_MAX;
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goto yesno;
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return (-1);
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case _SC_SEM_VALUE_MAX:
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mib[0] = CTL_P1003_1B;
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mib[1] = CTL_P1003_1B_SEM_VALUE_MAX;
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goto yesno;
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return (SEM_VALUE_MAX);
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case _SC_SIGQUEUE_MAX:
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mib[0] = CTL_P1003_1B;
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mib[1] = CTL_P1003_1B_SIGQUEUE_MAX;
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