Verify user in /etc/passwd
This is a product of wonder.
In file verify.c
#include <stdio.h>
#include <string.h>
#define MAX_LENGTH 1024
int is_local(char *user)
{
FILE *fd;
char line[MAX_LENGTH];
int local = 0;
if(!(fd = fopen("/etc/passwd", "r"))) {
puts("Can't read /etc/passwd, exiting.");
exit(1);
}
while(fgets(line, MAX_LENGTH, fd) > 0) {
if(!strncmp(line, user, strlen(user))) {
local = 1;
break;
}
}
fclose(fd);
return local;
}
Use at your own risk.
Disclaimer: Please refer to my first post ‘General notice’
Posted using Scott Yang’s mtsend.py python script. Thanks to Niel for his cool vim mappings.
Cool! There is a problem with the code though. If you have a user, say, “sophie”, but no user “sop”, and you tested for “sop” using this, I think you will get a 1.
You ought to test with the first colon too.
(And, of course, there’s always pwd.h.)
Comment by Kristina Lim — March 27, 2006 @ 10:33 am