C terminal commands


 
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# 8  
Old 01-24-2013
OK. I made a fake check_snmp_int.pl which just prints the line "eth0:UP (in=1.0Mbps/out=1.0Mbps):1 UP: OK" so I could test my program. Reading from odd lines like that is precisely what scanf/sscanf/etc are great at:

Code:
#include <stdio.h>

int main(void)
{
        char buf[512];
        float in=0.0, out=0.0;
        FILE *p=popen("./check_snmp_int.pl -H 192.168.1.1 -C public -n eth0 -k --label -w 0,0 -c 0,0 -d 15 -MB", "r");


        while(fgets(buf, 512, p))
                sscanf(buf, "eth0:UP (in=%fMbps/out=%fMbps)", &in, &out);

        pclose(p);

        printf("in+100:  %f out+100:  %f\n", in+100, out+100);
}

# 9  
Old 01-24-2013
...but I don't see why you're writing a program to to text processing in C.

If you showed some sample input and the sample output you expected from it, a simple shell script could probably be done for it.
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