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Diffstat (limited to 'functions.sh')
| -rw-r--r-- | functions.sh | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/functions.sh b/functions.sh index 504ee9e..60a4b2e 100644 --- a/functions.sh +++ b/functions.sh @@ -461,6 +461,26 @@ newest() } # +# Tries to determine the number of available processors. Falls back to trying to +# determine the number of online processors in a way that is somewhat portable. +# +get_nprocs() +{ + if nproc 2>/dev/null; then + # The nproc(1) utility is provided by GNU coreutils. It has the + # advantage of acknowledging the effect of sched_setaffinity(2). + true + elif getconf _NPROCESSORS_ONLN 2>/dev/null; then + # This is a non-standard extension. Nevertheless, it works for + # glibc, musl-utils, macOS, FreeBSD, NetBSD and OpenBSD. + true + else + warn "get_nprocs: failed to determine the number of processors" + false + fi +} + +# # Considers one or more pathnames and prints the one having the oldest # modification time. If at least one parameter is provided, all parameters shall # be considered as pathnames to be compared to one another. Otherwise, the |