I am writing programm that changes permission in the running;
I used at the command : seteuid();
the id of the process is changed but the permission not, why??
The program:
Code:
int status;
pid_t child = fork();
if (child == 0)
{
seteuid(1200); // I checks that "1200" is exist id process
execl("......");
}
else wait(&status);
In the Hand Mode :The process "1200" can to exec the command.
but in the this programm It can not.
Last edited by Yogesh Sawant; 05-05-2008 at 10:27 AM..
Reason: added code tags
seteuid has different results when run by users with different privilege. Are you running this as root, for example? You should check the return value of seteuid() - it ggives a zero on success -1 on failure. Then check the value of errno, or something. ex:
Code:
#include <stdlib.h>
< other includes requitred for fork(), etc. ...>
void somefunc(void)
{
int status;
pid_t child = fork();
if (child == 0)
{
status= seteuid(1200); // I checks that "1200" is exist id process
if(!status)
execl("......");
else
{
perror("seteuid error");
exit(1);
}
status=0;
wait(&status);
if(WIFEXITED(status))
{
................
}
}
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