Hi all ,
The following code tries traverse the directories with the starting directory given in
*directoryPath.
If the directory in
*directoryPath is just a directory ending with one or 2 sub-directories,it works fine.However if
directoryPath =
"/".There is seg.fault.I have attached a part of the output and the backtrace at the end.
Can u tell me what could be the problem ?
Code:
void walker(char *directoryPath){
struct dirent **namelist ={0};
int numOfEntries=0, i=0;
char *temp;
int file_select();
printf("In %s\n",directoryPath);
numOfEntries = scandir(directoryPath, &namelist, file_select,NULL);
printf("The Number of entries in %s are %d\n",directoryPath,numOfEntries);
for (i=1;i<numOfEntries+1;++i){
printf("%s \n",namelist[i-1]->d_name);
}
for (i=1;i<numOfEntries+1;++i){
temp = (char*)calloc(((size_t)strlen(directoryPath)+strlen(namelist[i-1]->d_name)+1),sizeof(char));
strcat(temp,directoryPath);
strcat(temp,"/");
strcat(temp,namelist[i-1]->d_name);
printf("===============================================================================================\n");
walker(temp);
free(temp);
}
}
Part of the OutPut and Backtrace in GDB
Code:
......
In //dev/.udev/links/input\x2fby-path\x2fplatform-i8042-serio-1-event-mouse
The Number of entries in //dev/.udev/links/input\x2fby-path\x2fplatform-i8042-serio-1-event-mouse are 0
===============================================================================================
In //dev/.udev/links/input\x2fby-path\x2fplatform-i8042-serio-1-mouse
The Number of entries in //dev/.udev/links/input\x2fby-path\x2fplatform-i8042-serio-1-mouse are 0
===============================================================================================
In //dev/.udev/links/snd\x2fby-path\x2fpci-0000:00:1b.0
Program received signal SIGSEGV, Segmentation fault.
0x0019983e in ?? () from /lib/tls/i686/cmov/libc.so.6
(gdb) backtrace
#0 0x0019983e in ?? () from /lib/tls/i686/cmov/libc.so.6
#1 0x0019bafd in ?? () from /lib/tls/i686/cmov/libc.so.6
#2 0x0019df9c in malloc () from /lib/tls/i686/cmov/libc.so.6
#3 0x001c16e9 in ?? () from /lib/tls/i686/cmov/libc.so.6
#4 0x001c180a in opendir () from /lib/tls/i686/cmov/libc.so.6
#5 0x001c1bd2 in scandir () from /lib/tls/i686/cmov/libc.so.6
#6 0x080485a7 in walker (directoryPath=0x804c2c8 "//dev/.udev/links/snd\\x2fby-path\\x2fpci-0000:00:1b.0") at TraverseDirectory.c:14
#7 0x080486ad in walker (directoryPath=0x804b1c0 "//dev/.udev/links") at TraverseDirectory.c:26
#8 0x080486ad in walker (directoryPath=0x804b018 "//dev/.udev") at TraverseDirectory.c:26
#9 0x080486ad in walker (directoryPath=0x804b008 "//dev") at TraverseDirectory.c:26
#10 0x080486ad in walker (directoryPath=0x8048842 "/") at TraverseDirectory.c:26
#11 0x08048741 in main () at TraverseDirectory.c:45
