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POStack Smashing Detected. C programming
 

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  1. POStack Smashing Detected. C programming
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    <p>i'm trying to run a C program. It seems to work fine, but at the end it shows:</p> <p>STACK SMASHING DETECTED</p> <p>This is the code:</p> <pre><code>#include &lt;stdio.h&gt; #include &lt;string.h&gt; #include &lt;stdlib.h&gt; #include &lt;unistd.h&gt; #include &lt;errno.h&gt; extern int errno; int main(int argc, char *argv[]){ /*Para pasar argumentos a la funcion main*/ char id[7]="\0"; char orden[10]="\0"; char arg[3]="\0"; char idhijo[7]="\0"; char ordenhijo[10]="\0"; char arghijo[3]="\0"; int i=0, j=0, k=0; int a=1, pipe1[2], pipe2[2], control, argument=0, status, posx=50, posy=50, s, t, arg_val=0, orden_val=0; FILE *fichero; char mensaje1[4], mensaje2[4], mensaje3[6]; char posxpadre[4]="50", posypadre[4]="50", hijoPID[4]; system("clear"); control = pipe(pipe1); if(control !=0){ perror("pipe1"); exit(errno); } control = pipe(pipe2); if(control !=0){ perror("pipe2"); exit(errno); } control = fork(); fichero=fopen(argv[1], "r"); if (fichero){ while((i != EOF) &amp;&amp; (j != EOF) &amp;&amp; (k != EOF)){ if((i != EOF) &amp;&amp; (j != EOF) &amp;&amp; (k != EOF)){ if (control ==-1){ perror("fork"); exit(errno); } if (control !=0){ k=fscanf(fichero, "%s", id); i=fscanf(fichero, "%s", orden); j=fscanf(fichero, "%s", arg); if(Robot_valido(id)){ write(pipe1[1], id, 7); write(pipe1[1], arg, 3); write(pipe1[1], posxpadre, 4); write(pipe1[1], posypadre, 4); write(pipe1[1], orden, 10); read(pipe2[0], posxpadre, 4); read(pipe2[0], hijoPID, 6); read(pipe2[0], posypadre, 4); printf("Hijo con PID %s desplazo el robot a la posicion: (%s, %s)\n\n", hijoPID, posxpadre, posypadre); } } else{ read(pipe1[0], idhijo, 7); read(pipe1[0], arghijo, 3); read(pipe1[0], posxpadre, 4); read(pipe1[0], posypadre, 4); read(pipe1[0], ordenhijo, 10); if (Robot_valido(idhijo)!=0){ Orden_valida(ordenhijo, arghijo, &amp;orden_val, &amp;arg_val); if (orden_val !=0 &amp;&amp; arg_val !=0){ argument=atoi(arghijo); posy=atoi(posypadre); posx=atoi(posxpadre); if (strcmp(ordenhijo, "arriba")==0){ if (posy&gt;1){ while (argument &gt; 0){ if (posy&gt;0){ posy--; argument--; } else{ argument=0; } } } } if (strcmp(ordenhijo, "abajo")==0){ if (posy&lt;100){ while (argument &gt; 0){ if (posy&lt;100){ posy++; argument--; } else{ argument=0; } } } } if (strcmp(ordenhijo, "derecha")==0){ if (posx&lt;100){ while (argument &gt; 0){ if (posx&lt;100){ posx++; argument--; } else{ argument=0; } } } } if (strcmp(ordenhijo, "izquierda")==0){ if (posx&gt;0){ while (argument &gt; 0){ if (posx&gt;0){ posx--; argument--; } else{ argument=0; } } } } printf("Robot desplazado hasta la posicion: (%d, %d)\n", posx, posy); sprintf(mensaje1, "%d", posx); sprintf(mensaje2, "%d", posy); sprintf(mensaje3, "%d", getpid()); write(pipe2[1], mensaje1, 4); write(pipe2[1], mensaje3, 6); write(pipe2[1], mensaje2, 4); } } } } } close(pipe1[0]); close(pipe1[1]); close(pipe2[0]); close(pipe2[1]); } } </code></pre> <p>Does anybody know why this is happening? I've done a lot of research in Google but every possible answer i tried didn't work. Any help would be really helpful.</p> <p>Thank you all!!</p>
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    1. USAlex Aldridge Asa
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    1. COYou have a stack overflow somewhere. You can disable stack cookies in your compiler, which will probably cause a segmentation fault that you can further analyse in your debugger.
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      1. POStack Smashing Detected. C programming
      1. USNiklas B.
    2. CODid you look here: http://stackoverflow.com/questions/1345670/stack-smashing-detected ?
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      1. POStack Smashing Detected. C programming
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    3. COIf you are going to ask people to help you, please make sure your code is formatted nicely, especially if you are going to post so much of it. (the indentation is very broken due to mixing tabs and spaces)
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      1. POStack Smashing Detected. C programming
      1. UShuon
 

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