C segfault: __libc_start_main at end of execution

[matmatmat]

Can someone help me please, when I run my program below it gives a SIGSEGV Segmentation fault at the end of execution. When I backtraced in gdb it said:


#0 0xb7e05b02 in __libc_start_main () from /lib/libc.so.6
Cannot access memory at address 0x6b726f5b


Help is appreciated :-)



#include <stdio.h>
#include <string.h>
#include "proglib.h"

int main(int argc, const char *argv[]){
setupSQLite();
++argv;
--argc;
for(; argc-->0; ++argv){
if(strcmp(*argv, "-l") == 0){
listAll();
}
}
killSQLite();
return 0;
}

//-----------------------------------------------
// proglib.c
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sqlite3.h>
#include "cdootlib.h"

int retval = 0;
int q_cnt = 5;
int q_size = 150;
int ind = 0;
char **queries = 0;
sqlite3_stmt *stmt = 0;
sqlite3 *handle = 0;


void setupSQLite(){
queries = malloc(sizeof(char) * q_cnt * q_size);
retval = sqlite3_open("todo.sqlite3", &handle);
if(retval){
printf("Database connection failed\n");
exit(-1);
}

char create_table[200] = "CREATE TABLE IF NOT EXISTS todos (id INTEGER PRIMARY KEY, project TEXT, summary TEXT, done INTEGER);";
sqlite3_exec(handle,create_table,0,0,0);
}

void listAll(){
queries[ind++] = "SELECT * FROM todos order by project, done desc;";
retval = sqlite3_prepare_v2(handle,queries[ind-1],-1,&stmt,0);
if(retval){
printf("Selecting data from DB Failed\n");
exit(-1);
}
int cols = sqlite3_column_count(stmt);

char *project;
while(1){
retval = sqlite3_step(stmt);
if(retval == SQLITE_ROW){
for(int col=0 ; col<cols;col++){
const char *val = (const char*)sqlite3_column_text(stmt,col);
char *cname = sqlite3_column_name(stmt,col);

if(strcmp(cname, "project") == 0){
if(strcmp(val, (const char*)project) != 0){
strcpy(project, val);
printf("%s\n %s | ", project, (const char*)sqlite3_column_text(stmt,col-1));
}else
printf(" %s | ", (const char*)sqlite3_column_text(stmt,col-1));
}else if(strcmp(cname, "id") != 0){
if(strcmp(cname, "done") != 0)
printf("%-30s | ", val);
}
}
printf("\n");
}
else if(retval == SQLITE_DONE){
break;
}else{
printf("Some error encountered\n");
exit(-1);
}
}
}

void killSQLite(){
sqlite3_close(handle);
free(queries);
}

[dwhitney67]

In listAll(), it would appear as if the following variable is never initialized. Oh the horror!


char *project;