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POStack Smashing Detected. C programming
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  1. POStack Smashing Detected. C programming
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    copied!<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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