noob to C need a little help!!!

This is a discussion on noob to C need a little help!!! within the C Programming forums, part of the General Programming Boards category; hi.I am a gentoo user.I want to create a little tool that will give to me stats of my computer. ...

  1. #1
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    Exclamation noob to C need a little help!!!

    hi.I am a gentoo user.I want to create a little tool that will give to me stats of my computer.
    On gentoo command:
    Code:
    cat /proc/cpuinfo
    give me this:
    Code:
    processor       : 0
    vendor_id       : GenuineIntel
    cpu family      : 6
    model           : 15
    model name      : Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz
    stepping        : 11
    cpu MHz         : 2394.000
    cache size      : 4096 KB
    physical id     : 0
    siblings        : 4
    core id         : 0
    cpu cores       : 4
    apicid          : 0
    initial apicid  : 0
    fdiv_bug        : no
    hlt_bug         : no
    f00f_bug        : no
    coma_bug        : no
    fpu             : yes
    fpu_exception   : yes
    cpuid level     : 10
    wp              : yes
    flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm tpr_shadow vnmi flexpriority
    bogomips        : 4800.03
    clflush size    : 64
    power management:
    
    processor       : 1
    vendor_id       : GenuineIntel
    cpu family      : 6
    model           : 15
    model name      : Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz
    stepping        : 11
    cpu MHz         : 2394.000
    cache size      : 4096 KB
    physical id     : 0
    siblings        : 4
    core id         : 2
    cpu cores       : 4
    apicid          : 2
    initial apicid  : 2
    fdiv_bug        : no
    hlt_bug         : no
    f00f_bug        : no
    coma_bug        : no
    fpu             : yes
    fpu_exception   : yes
    cpuid level     : 10
    wp              : yes
    flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm tpr_shadow vnmi flexpriority
    bogomips        : 4800.16
    clflush size    : 64
    power management:
    
    processor       : 2
    vendor_id       : GenuineIntel
    cpu family      : 6
    model           : 15
    model name      : Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz
    stepping        : 11
    cpu MHz         : 2394.000
    cache size      : 4096 KB
    physical id     : 0
    siblings        : 4
    core id         : 1
    cpu cores       : 4
    apicid          : 1
    initial apicid  : 1
    fdiv_bug        : no
    hlt_bug         : no
    f00f_bug        : no
    coma_bug        : no
    fpu             : yes
    fpu_exception   : yes
    cpuid level     : 10
    wp              : yes
    flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm tpr_shadow vnmi flexpriority
    bogomips        : 4800.15
    clflush size    : 64
    power management:
    
    processor       : 3
    vendor_id       : GenuineIntel
    cpu family      : 6
    model           : 15
    model name      : Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz
    stepping        : 11
    cpu MHz         : 2394.000
    cache size      : 4096 KB
    physical id     : 0
    siblings        : 4
    core id         : 3
    cpu cores       : 4
    apicid          : 3
    initial apicid  : 3
    fdiv_bug        : no
    hlt_bug         : no
    f00f_bug        : no
    coma_bug        : no
    fpu             : yes
    fpu_exception   : yes
    cpuid level     : 10
    wp              : yes
    flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm tpr_shadow vnmi flexpriority
    bogomips        : 4800.15
    clflush size    : 64
    power management:
    so i want to exec this command on C

    This is my try.

    Code:
    #include <stdio.h>
    main()
    {
    char a,1,2 ;
    printf ("Welcome to fsproc.Created by Ember George");
    printf ("\n");
    printf ("1) CPU");
    printf ("\n");
    printf ("2) RAM");
    printf ("\n");
    printf ("Please select proc number:");
    scanf  ("%c",&a);
    if (a==1)
    here i want to exec cat /proc/cpuinfo and see the result;
    else if (a==2)
    here i want to exec cat /proc/meminfo and see the result;
    }
    can someone help me to do that???

  2. #2
    C++ Witch laserlight's Avatar
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    Not to dissuade you from learning C, but have you considered writing a shell script instead?
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    Look up a C++ Reference and learn How To Ask Questions The Smart Way

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    i am doing it for 2 reason.First off all i am full in love with C so practice with small and easy projects is one way to learn C!!!!The second reason is that on my university they tell as to do something on C.So i want something usefull,easy but not a calc or hello world.I want something like that but with a lot of stats!!!!!but i have no idea how to print the result of this proccess.when i press "1" on my program i want to take the stats of my cpu that is the result of /proc/cpuinfo!!!with "2" the stats of ram,with "3" the stats of disks etc!!!!i think that will be nice at the end
    Last edited by sk8harddiefast; 02-27-2010 at 10:40 AM.

  4. #4
    C++ Witch laserlight's Avatar
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    Well, then what you need to do is to open the relevant file, read its contents, and write the contents to standard output, and close the file when you are done. Easy, but a little more involved than writing a shell script.

    You can modularise your program by writing a function that basically does the same thing as cat, then call it for each file as needed.
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    and how to do that???because i don't know C very well.only basics like scanf,printf,if else and i know fprintf & fscanf but i have a little syntax problem!!!

  6. #6
    C++ Witch laserlight's Avatar
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    Quote Originally Posted by sk8harddiefast
    and how to do that???because i don't know C very well.only basics like scanf,printf,if else and i know fprintf & fscanf but i have a little syntax problem!!!
    One easy way is to read and write character by character: use fopen(), fgetc(), putchar(), and fclose().
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    ok.I will google it and make a try.If i can't do it i will write back

  8. #8
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    Or even popen(), to read the output of that command directly into your program.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
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    i can not do it
    i tried everything but i can not
    please if you can help me
    also i make this little program only to open and read the file but is not reading it!!!!
    #include <stdio.h>
    main()
    {
    FILE *fp;
    {
    if ((fp = fopen("/proc/cpuinfo","r")) == NULL)
    return;
    }
    }
    Last edited by sk8harddiefast; 02-27-2010 at 02:15 PM.

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