You are right. seteuid is failing. I have given vishalj the following rights as mentioned in user doc An important restriction is that the application using LogonUser must have special permissions:
"Act as part of the operating system" "Replace process level token" "Increase quotas"
Also user vishalj belongs to Administrators group. /etc/passwd has that information. Are there any more priveleges I need to give? thanks, Vishal
-----Original Message----- From: Andrew DeFaria [mailto:[EMAIL PROTECTED] Sent: Thursday, March 20, 2003 1:17 PM To: [EMAIL PROTECTED] Subject: Re: seteuid and file ownership
You might start by checking the status after the setuid call. Perhaps it failed.
Vishal Jain wrote:
Hi, I am making a seteuid() call to impersonate user "shweta". Then I create a file. When I do ls -l on the file, it shows the owner as "vishalj" which was the user before doing impersonation. -rw-rw-rw- 1 vishalj mkgroup 0 Mar 20 12:50 shweta Is this expected behaviour in cygwin? I am attaching the code snippet-
#include <windows.h> #include <sys/cygwin.h> #include <stdio.h> #include <pwd.h>
int main(int argc, char *argv[]){ HANDLE token = INVALID_HANDLE_VALUE; struct passwd *pw = NULL; FILE *fp = NULL; pw = getpwnam("shweta"); token = cygwin_logon_user(pw, "shweta"); if(token == INVALID_HANDLE_VALUE){ printf("Login failed\n"); } cygwin_set_impersonation_token(token); seteuid(pw->pw_uid); fp = fopen("shweta", "w"); if(fp == NULL){ printf("could not open file for writing\n"); } fclose(fp); }
Thanks, Vishal
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