gcOutput1.awk

#
# matching the following output specified as a pattern that verifies
# that the numerical values conform to a specific pattern, rather than
# specific values.
#
# -gc 0
#
#    S0C         S1C         S0U         S1U          EC           EU           OC           OU          MC         MU       CCSC      CCSU     YGC     YGCT     FGC    FGCT     CGC    CGCT       GCT   
#        0.0      2048.0         0.0      1079.5       4096.0          0.0       2048.0          0.0     7680.0     7378.6     768.0     664.7      4     0.140     0     0.000     0     0.000     0.140
#
# -J-XX:+UseParallelGC -gc 0
#
#    S0C         S1C         S0U         S1U          EC           EU           OC           OU          MC         MU       CCSC      CCSU     YGC     YGCT     FGC    FGCT     CGC    CGCT       GCT   
#      512.0       512.0       512.0         0.0       6144.0        634.8       5632.0        748.1     8320.0     7851.5     896.0     730.2      4     0.171     0     0.000     -         -     0.171


BEGIN	{
	    headerlines=0; datalines=0; totallines=0
	}

/^    S0C         S1C         S0U         S1U          EC           EU           OC           OU          MC         MU       CCSC      CCSU     YGC     YGCT     FGC    FGCT     CGC    CGCT       GCT   $/	{
	    headerlines++;
	}

/^[ ]*[0-9]+\.[0-9]+[ ]*[0-9]+\.[0-9]+[ ]*[0-9]+\.[0-9]+[ ]*[0-9]+\.[0-9]+[ ]*[0-9]+\.[0-9]+[ ]*[0-9]+\.[0-9]+[ ]*[0-9]+\.[0-9]+[ ]*[0-9]+\.[0-9]+[ ]*[0-9]+\.[0-9]+[ ]*[0-9]+\.[0-9]+[ ]*[0-9]+\.[0-9]+[ ]*[0-9]+\.[0-9]+[ ]*[0-9]+[ ]*[0-9]+\.[0-9]+[ ]*[0-9]+[ ]*[0-9]+\.[0-9]+[ ]*(-|[0-9]+)[ ]*(-|[0-9]+\.[0-9]+)[ ]*[0-9]+\.[0-9]+$/	{
	    datalines++;
	}

	{ totallines++; print $0 }

END	{
	    if ((headerlines == 1) && (datalines == 1)) {
	        exit 0
	    }
	    else {
	        exit 1
	    }
	}