#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int main() {
char *buf = "2012/9/8";
char sep[] = "/";
char *token;
// char *bp = strdup(buf);
char *bp = buf;
while ((token = strsep(&bp,sep))) {
printf("tok = `%s'\n", token);
}
free(bp);
return 0;
}
If I don't use strdup. assign "char *bp = buf". then the above programe will segment fault. gdb output below:
Program terminated with signal 11, Segmentation fault.
#0 0x00007fcc949c13b5 in strsep () from /lib/x86_64-linux-gnu/libc.so.6
(gdb) bt
#0 0x00007fcc949c13b5 in strsep () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00000000004005d5 in main () at str_split.c:11
what's wrong with the program ?
If I don't use strdup. assign "char *bp = buf". then the above programe will segment fault.
It might have to to something with buf pointing to memory which cannot be legally written, a string literal in this case. If you use strdup you'll be writing to your own writable copy.