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new version of Get_Pwnam()

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o check the username in all lowercase
  o check the username as transmitted if this would be a different case
  o check the username in all upper case if this is a new version


-- jerry
(This used to be commit 059f4fee5d)
This commit is contained in:
Gerald Carter 2000-12-11 17:48:26 +00:00
parent 4d56f4f310
commit ea4a0d509e
1 changed files with 48 additions and 50 deletions
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98
source3/lib/username.c
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@ -169,67 +169,65 @@ static struct passwd *_Get_Pwnam(char *s)
/****************************************************************************
A wrapper for getpwnam() that tries with all lower and all upper case
if the initial name fails. Also tried with first letter capitalised
A wrapper for getpwnam(). The following variations are tried...
- in all lower case
- as transmitted IF a different case
- in all upper case IF that is different from the transmitted username
- using the lp_usernamelevel() for permutations
Note that this can change user!
****************************************************************************/
struct passwd *Get_Pwnam(char *user,BOOL allow_change)
{
fstring user2;
int last_char;
int usernamelevel = lp_usernamelevel();
fstring user2, orig_username;
int usernamelevel = lp_usernamelevel();
struct passwd *ret;
struct passwd *ret;
if (!user || !(*user))
return(NULL);
if (!user || !(*user))
return(NULL);
/* make a few copies to work with */
fstrcpy(orig_username, user);
if (!allow_change)
{
/* allow_change was False, so make a copy and temporarily
assign the char* user to the temp copy */
fstrcpy(user2,user);
user = &user2[0];
}
StrnCpy(user2,user,sizeof(user2)-1);
/* try in all lower case first as this is the most
common case on UNIX systems */
strlower(user);
ret = _Get_Pwnam(user);
if (ret)
return(ret);
/* try as transmitted, but only if the original username
gives us a different case */
if (strcmp(user, orig_username) != 0)
{
ret = _Get_Pwnam(orig_username);
if (ret)
return(ret);
}
if (!allow_change) {
user = &user2[0];
}
/* finally, try in all caps if that is a new case */
strupper(user);
if (strcmp(user, orig_username) != 0)
{
ret = _Get_Pwnam(user);
if (ret)
return(ret);
}
ret = _Get_Pwnam(user);
if (ret)
return(ret);
/* Try all combinations up to usernamelevel. */
strlower(user);
ret = uname_string_combinations(user, _Get_Pwnam, usernamelevel);
if (ret)
return(ret);
strlower(user);
ret = _Get_Pwnam(user);
if (ret)
return(ret);
strupper(user);
ret = _Get_Pwnam(user);
if (ret)
return(ret);
/* Try with first letter capitalised. */
if (strlen(user) > 1)
strlower(user+1);
ret = _Get_Pwnam(user);
if (ret)
return(ret);
/* try with last letter capitalised */
strlower(user);
last_char = strlen(user)-1;
user[last_char] = toupper(user[last_char]);
ret = _Get_Pwnam(user);
if (ret)
return(ret);
/* Try all combinations up to usernamelevel. */
strlower(user);
ret = uname_string_combinations(user, _Get_Pwnam, usernamelevel);
if (ret)
return(ret);
if (allow_change)
fstrcpy(user,user2);
return(NULL);
return(NULL);
}
/****************************************************************************