mirror of
https://github.com/postgres/postgres.git
synced 2025-04-20 00:42:27 +03:00
88 lines
1.7 KiB
C
88 lines
1.7 KiB
C
/*-------------------------------------------------------------------------
|
|
*
|
|
* username.c
|
|
* get user name
|
|
*
|
|
* Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
|
|
* Portions Copyright (c) 1994, Regents of the University of California
|
|
*
|
|
* IDENTIFICATION
|
|
* src/common/username.c
|
|
*
|
|
*-------------------------------------------------------------------------
|
|
*/
|
|
|
|
#ifndef FRONTEND
|
|
#include "postgres.h"
|
|
#else
|
|
#include "postgres_fe.h"
|
|
#endif
|
|
|
|
#include <pwd.h>
|
|
#include <unistd.h>
|
|
|
|
#include "common/username.h"
|
|
|
|
/*
|
|
* Returns the current user name in a static buffer
|
|
* On error, returns NULL and sets *errstr to point to a palloc'd message
|
|
*/
|
|
const char *
|
|
get_user_name(char **errstr)
|
|
{
|
|
#ifndef WIN32
|
|
struct passwd *pw;
|
|
uid_t user_id = geteuid();
|
|
|
|
*errstr = NULL;
|
|
|
|
errno = 0; /* clear errno before call */
|
|
pw = getpwuid(user_id);
|
|
if (!pw)
|
|
{
|
|
*errstr = psprintf(_("could not look up effective user ID %ld: %s"),
|
|
(long) user_id,
|
|
errno ? strerror(errno) : _("user does not exist"));
|
|
return NULL;
|
|
}
|
|
|
|
return pw->pw_name;
|
|
#else
|
|
/* Microsoft recommends buffer size of UNLEN+1, where UNLEN = 256 */
|
|
/* "static" variable remains after function exit */
|
|
static char username[256 + 1];
|
|
DWORD len = sizeof(username);
|
|
|
|
*errstr = NULL;
|
|
|
|
if (!GetUserName(username, &len))
|
|
{
|
|
*errstr = psprintf(_("user name lookup failure: error code %lu"),
|
|
GetLastError());
|
|
return NULL;
|
|
}
|
|
|
|
return username;
|
|
#endif
|
|
}
|
|
|
|
|
|
/*
|
|
* Returns the current user name in a static buffer or exits
|
|
*/
|
|
const char *
|
|
get_user_name_or_exit(const char *progname)
|
|
{
|
|
const char *user_name;
|
|
char *errstr;
|
|
|
|
user_name = get_user_name(&errstr);
|
|
|
|
if (!user_name)
|
|
{
|
|
fprintf(stderr, "%s: %s\n", progname, errstr);
|
|
exit(1);
|
|
}
|
|
return user_name;
|
|
}
|