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f77b6ca3 | 1 | /* Implementation of the GETLOG g77 intrinsic. |
7adcbafe | 2 | Copyright (C) 2005-2022 Free Software Foundation, Inc. |
f77b6ca3 FXC |
3 | Contributed by François-Xavier Coudert <coudert@clipper.ens.fr> |
4 | ||
15fb94ae | 5 | This file is part of the GNU Fortran runtime library (libgfortran). |
f77b6ca3 FXC |
6 | |
7 | Libgfortran is free software; you can redistribute it and/or | |
8 | modify it under the terms of the GNU General Public | |
9 | License as published by the Free Software Foundation; either | |
748086b7 | 10 | version 3 of the License, or (at your option) any later version. |
f77b6ca3 FXC |
11 | |
12 | Libgfortran is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
748086b7 JJ |
17 | Under Section 7 of GPL version 3, you are granted additional |
18 | permissions described in the GCC Runtime Library Exception, version | |
19 | 3.1, as published by the Free Software Foundation. | |
20 | ||
21 | You should have received a copy of the GNU General Public License and | |
22 | a copy of the GCC Runtime Library Exception along with this program; | |
23 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
24 | <http://www.gnu.org/licenses/>. */ | |
f77b6ca3 | 25 | |
f77b6ca3 FXC |
26 | #include "libgfortran.h" |
27 | ||
deeab820 | 28 | #include <string.h> |
36ae8a61 | 29 | |
f77b6ca3 | 30 | #ifdef HAVE_UNISTD_H |
aa4042b1 TB |
31 | # if defined __MINGW32__ && defined HAVE_GETLOGIN |
32 | # define _POSIX 1 | |
33 | # endif | |
f77b6ca3 FXC |
34 | #include <unistd.h> |
35 | #endif | |
6422c112 FXC |
36 | #ifdef HAVE_PWD_H |
37 | #include <pwd.h> | |
38 | #endif | |
f77b6ca3 | 39 | |
86ab6320 FXC |
40 | /* Windows32 version */ |
41 | #if defined __MINGW32__ && !defined HAVE_GETLOGIN | |
42 | #define WIN32_LEAN_AND_MEAN | |
43 | #include <windows.h> | |
44 | #include <lmcons.h> /* for UNLEN */ | |
45 | ||
46 | static char * | |
47 | w32_getlogin (void) | |
48 | { | |
49 | static char name [UNLEN + 1]; | |
50 | DWORD namelen = sizeof (name); | |
51 | ||
52 | GetUserName (name, &namelen); | |
53 | return (name[0] == 0 ? NULL : name); | |
54 | } | |
55 | ||
56 | #undef getlogin | |
57 | #define getlogin w32_getlogin | |
58 | #define HAVE_GETLOGIN 1 | |
59 | ||
60 | #endif | |
61 | ||
62 | ||
f77b6ca3 FXC |
63 | /* GETLOG (LOGIN), g77 intrinsic for retrieving the login name for the |
64 | process. | |
65 | CHARACTER(len=*), INTENT(OUT) :: LOGIN */ | |
66 | ||
f77b6ca3 FXC |
67 | void PREFIX(getlog) (char *, gfc_charlen_type); |
68 | export_proto_np(PREFIX(getlog)); | |
69 | ||
deeab820 | 70 | void |
f77b6ca3 FXC |
71 | PREFIX(getlog) (char * login, gfc_charlen_type login_len) |
72 | { | |
f77b6ca3 FXC |
73 | char *p; |
74 | ||
75 | memset (login, ' ', login_len); /* Blank the string. */ | |
76 | ||
23e6d4a5 | 77 | #if defined(HAVE_POSIX_GETPWUID_R) && defined(HAVE_GETEUID) |
15fb94ae JB |
78 | struct passwd pwd; |
79 | struct passwd *result; | |
80 | char *buf; | |
81 | int err; | |
82 | /* To be pedantic, buflen should be determined by | |
83 | sysconf(_SC_GETPW_R_SIZE_MAX), which is 1024 on some tested | |
84 | targets; we do something simple in case the target doesn't | |
85 | support sysconf. */ | |
86 | static const size_t buflen = 1024; | |
1a0fd3d3 | 87 | buf = xmalloc (buflen); |
15fb94ae JB |
88 | err = getpwuid_r (geteuid (), &pwd, buf, buflen, &result); |
89 | if (err != 0 || result == NULL) | |
90 | goto cleanup; | |
91 | p = pwd.pw_name; | |
92 | #elif defined(HAVE_GETPWUID) && defined(HAVE_GETEUID) | |
6422c112 FXC |
93 | { |
94 | struct passwd *pw = getpwuid (geteuid ()); | |
95 | if (pw) | |
96 | p = pw->pw_name; | |
97 | else | |
98 | return; | |
99 | } | |
15fb94ae | 100 | #elif HAVE_GETLOGIN |
6422c112 FXC |
101 | p = getlogin(); |
102 | # else | |
103 | return; | |
6422c112 FXC |
104 | #endif |
105 | ||
f77b6ca3 | 106 | if (p == NULL) |
15fb94ae | 107 | goto cleanup; |
f77b6ca3 | 108 | |
f622221a | 109 | gfc_charlen_type p_len = strlen (p); |
f77b6ca3 | 110 | if (login_len < p_len) |
15fb94ae JB |
111 | p_len = login_len; |
112 | memcpy (login, p, p_len); | |
113 | ||
114 | cleanup: | |
23e6d4a5 | 115 | #if defined (HAVE_POSIX_GETPWUID_R) && defined(HAVE_GETEUID) |
15fb94ae | 116 | free (buf); |
8717f52f KT |
117 | #else |
118 | ; | |
15fb94ae | 119 | #endif |
f77b6ca3 | 120 | } |