C PROGRAMMING

I get a segmentation fault wen trying to run the program.

When I debug it using gdb I get I get the error:

Starting program: /home/s231453/Oblig_1/a.out

Program received signal SIGSEGV, Segmentation fault.

__strlen_ia32 () at ../sysdeps/i386/i586/strlen.S:94

94 ../sysdeps/i386/i586/strlen.S: No such file or file directory.

And I have no idea where the problem is, can anyone help me?

PS: It says that the error happened in line 94, but I have taken a few lines away when I pasted it in here. So, you will have to debug it again and see where the error is now.

Thank you so much for help.

CODE:

#include

#include

#include

#include

#define ARRAY_LENGTH 250

typedef struct medlemsinfo// main structure

{

char name_1 [250];

char name_2 [100];

char name_3 [100];

int pub_key;

}student_t;

/********************************************

******* function to read student data *******

********************************************/

student_t les_data (char *klasseliste);

/********************************************

******* function to print student data ******

********************************************/

void skriv_data(student_t pStudent, int index);

student_t les_data (char *str)// reading records

{

student_t s1;

int counter = 0;

strcpy(s1.name_3, " ");

char *token = strtok(str, " ");

while( token != NULL )

{

switch(counter){

case 0:

strcpy(s1.name_1, token);

break;

case 1:

strcpy(s1.name_2, token);

break;

default:

if(isdigit(token[0])) {

s1.pub_key = atoi(token);

}

else {

strcat(s1.name_3, " ");

strcat(s1.name_3, token);

}

break;

}

counter++;

token = strtok( NULL, " " );// reset the token flag

}

return s1;

}

//----------------------------------------//

void skriv_data(student_t pStudent, int index)

{

if (index == 1 ){

printf("%s\t%s\t%s\t%d ", pStudent.name_1, pStudent.name_2 ,pStudent.name_3,pStudent.pub_key);

}

else if (index == 2 ){

printf("%d\t%s\t%s\t%s ", pStudent.pub_key, pStudent.name_1 ,pStudent.name_2,pStudent.name_3);

}

else if (index == 3){

printf("%s\t%s\t%s\t%d\tn", pStudent.name_2 ,pStudent.name_1 ,pStudent.name_3,pStudent.pub_key);

}

}

int main (int argc, char *argv[])

{

/** first check number of arguments **/

int input_index;

char *tmp;

setenv("miljo",argv[1],1);// create and read value for enviornment variable

tmp = getenv("miljo");

if(strcmp(tmp,"1"))

{

input_index = 1;

}

else if (strcmp(tmp,"2"))

{

input_index = 2 ;

}

else if (strcmp(tmp,"3"))

{

input_index = 3 ;

}

student_t s_arr[100];

int ii ; // to loop through the list

FILE* file;

file = popen("./klasselist.sh","r");

if (!file){

return -1;

}

/** create a string to buffer the names **/

char str[ARRAY_LENGTH];

int s_arr_index = 0;

while (fgets(str, ARRAY_LENGTH, file))

{

s_arr[s_arr_index] = les_data(str);

s_arr_index++;

}

for(ii = 0 ; ii< s_arr_index ; ii++){

skriv_data(s_arr[ii],input_index);

}

return 0;

}