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username.c File Reference

#include "postgres.h"
#include <pwd.h>
#include <unistd.h>
#include "common/username.h"

Include dependency graph for username.c:

Go to the source code of this file.

Functions

const char * get_user_name (char **errstr)

const char * get_user_name_or_exit (const char *progname)

Function Documentation

◆ get_user_name()

const char * get_user_name ( char ** errstr )

Definition at line 31 of file username.c.

32{

33#ifndef WIN32

34 struct passwd *pw;

35 uid_t user_id = geteuid();

36

37 *errstr = NULL;

38

39 errno = 0; /* clear errno before call */

40 pw = getpwuid(user_id);

41 if (!pw)

42 {

43 *errstr = psprintf(_("could not look up effective user ID %ld: %s"),

44 (long) user_id,

45 errno ? strerror(errno) : _("user does not exist"));

46 return NULL;

47 }

48

49 return pw->pw_name;

50#else

51 /* Microsoft recommends buffer size of UNLEN+1, where UNLEN = 256 */

52 /* "static" variable remains after function exit */

53 static char username[256 + 1];

54 DWORD len = sizeof(username);

55

56 *errstr = NULL;

57

58 if (!GetUserName(username, &len))

59 {

60 *errstr = psprintf(_("user name lookup failure: error code %lu"),

61 GetLastError());

62 return NULL;

63 }

64

65 return username;

66#endif

67}

_

#define _(x)

Definition: elog.c:91

username

static char * username

Definition: initdb.c:153

len

const void size_t len

Definition: pg_crc32c_sse42.c:28

strerror

#define strerror

Definition: port.h:252

psprintf

char * psprintf(const char *fmt,...)

Definition: psprintf.c:43

uid_t

int uid_t

Definition: win32_port.h:234

References _, len, psprintf(), strerror, and username.

Referenced by get_user_info(), and get_user_name_or_exit().

◆ get_user_name_or_exit()

const char * get_user_name_or_exit ( const char * progname )

Definition at line 74 of file username.c.

75{

76 const char *user_name;

77 char *errstr;

78

79 user_name = get_user_name(&errstr);

80

81 if (!user_name)

82 {

83 fprintf(stderr, "%s: %s\n", progname, errstr);

84 exit(1);

85 }

86 return user_name;

87}

fprintf

#define fprintf(file, fmt, msg)

Definition: cubescan.l:21

progname

const char * progname

Definition: main.c:44

get_user_name

const char * get_user_name(char **errstr)

Definition: username.c:31

References fprintf, get_user_name(), and progname.

Referenced by get_id(), main(), and vacuuming_main().