Mercurial > hg > octave-shane > gnulib-hg
annotate lib/grantpt.c @ 15727:144db791c6fa
Ensure EBADF returns for socket functions on mingw.
* lib/accept.c (rpl_accept): Fail with error EBADF if the file
descriptor is invalid.
* lib/bind.c (rpl_bind): Likewise.
* lib/connect.c (rpl_connect): Likewise.
* lib/getpeername.c (rpl_getpeername): Likewise.
* lib/getsockname.c (rpl_getsockname): Likewise.
* lib/getsockopt.c (rpl_getsockopt): Likewise.
* lib/listen.c (rpl_listen): Likewise.
* lib/recv.c (rpl_recv): Likewise.
* lib/recvfrom.c (rpl_recvfrom): Likewise.
* lib/send.c (rpl_send): Likewise.
* lib/sendto.c (rpl_sendto): Likewise.
* lib/setsockopt.c (rpl_setsockopt): Likewise.
* lib/shutdown.c (rpl_shutdown): Likewise.
| author | Bruno Haible <bruno@clisp.org> |
|---|---|
| date | Wed, 21 Sep 2011 00:20:59 +0200 |
| parents | 97fc9a21a8fb |
| children | e4144dcb6f45 |
| rev | line source |
|---|---|
| 13028 | 1 /* Acquire ownership of the slave side of a pseudo-terminal. |
|
14079
97fc9a21a8fb
maint: update almost all copyright ranges to include 2011
Jim Meyering <meyering@redhat.com>
parents:
13028
diff
changeset
|
2 Copyright (C) 1998-2002, 2009-2011 Free Software Foundation, Inc. |
| 13028 | 3 Contributed by Zack Weinberg <zack@rabi.phys.columbia.edu>, 1998. |
| 4 | |
| 5 This program is free software: you can redistribute it and/or modify | |
| 6 it under the terms of the GNU General Public License as published by | |
| 7 the Free Software Foundation; either version 3 of the License, or | |
| 8 (at your option) any later version. | |
| 9 | |
| 10 This program is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 GNU General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU General Public License | |
| 16 along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
| 17 | |
| 18 #include <config.h> | |
| 19 | |
| 20 #include <stdlib.h> | |
| 21 | |
| 22 #include <assert.h> | |
| 23 #include <errno.h> | |
| 24 #include <string.h> | |
| 25 #include <sys/wait.h> | |
| 26 #include <unistd.h> | |
| 27 | |
| 28 #if HAVE_SETRLIMIT | |
| 29 # include <sys/types.h> | |
| 30 # include <sys/time.h> | |
| 31 # include <sys/resource.h> | |
| 32 #endif | |
| 33 | |
| 34 #include "configmake.h" | |
| 35 #include "pty-private.h" | |
| 36 | |
| 37 #ifndef _LIBC | |
| 38 # define __builtin_expect(expr,val) (expr) | |
| 39 # define __set_errno(e) errno = (e) | |
| 40 # define __dup2 dup2 | |
| 41 # define __fork fork | |
| 42 # define __setrlimit setrlimit | |
| 43 # define __waitpid waitpid | |
| 44 #endif | |
| 45 | |
| 46 int | |
| 47 grantpt (int fd) | |
| 48 { | |
| 49 /* This function is most often called from a process without 'root' | |
| 50 credentials. Use the helper program. */ | |
| 51 int retval = -1; | |
| 52 pid_t pid = __fork (); | |
| 53 if (pid == -1) | |
| 54 goto cleanup; | |
| 55 else if (pid == 0) | |
| 56 { | |
| 57 /* This is executed in the child process. */ | |
| 58 | |
| 59 #if HAVE_SETRLIMIT && defined RLIMIT_CORE | |
| 60 /* Disable core dumps. */ | |
| 61 struct rlimit rl = { 0, 0 }; | |
| 62 __setrlimit (RLIMIT_CORE, &rl); | |
| 63 #endif | |
| 64 | |
| 65 /* We pass the master pseudo terminal as file descriptor PTY_FILENO. */ | |
| 66 if (fd != PTY_FILENO) | |
| 67 if (__dup2 (fd, PTY_FILENO) < 0) | |
| 68 _exit (FAIL_EBADF); | |
| 69 | |
| 70 #ifdef CLOSE_ALL_FDS | |
| 71 CLOSE_ALL_FDS (); | |
| 72 #endif | |
| 73 | |
| 74 execle (_PATH_PT_CHOWN, strrchr (_PATH_PT_CHOWN, '/') + 1, NULL, NULL); | |
| 75 _exit (FAIL_EXEC); | |
| 76 } | |
| 77 else | |
| 78 { | |
| 79 int w; | |
| 80 | |
| 81 if (__waitpid (pid, &w, 0) == -1) | |
| 82 goto cleanup; | |
| 83 if (!WIFEXITED (w)) | |
| 84 __set_errno (ENOEXEC); | |
| 85 else | |
| 86 switch (WEXITSTATUS (w)) | |
| 87 { | |
| 88 case 0: | |
| 89 retval = 0; | |
| 90 break; | |
| 91 case FAIL_EBADF: | |
| 92 __set_errno (EBADF); | |
| 93 break; | |
| 94 case FAIL_EINVAL: | |
| 95 __set_errno (EINVAL); | |
| 96 break; | |
| 97 case FAIL_EACCES: | |
| 98 __set_errno (EACCES); | |
| 99 break; | |
| 100 case FAIL_EXEC: | |
| 101 __set_errno (ENOEXEC); | |
| 102 break; | |
| 103 case FAIL_ENOMEM: | |
| 104 __set_errno (ENOMEM); | |
| 105 break; | |
| 106 | |
| 107 default: | |
| 108 assert(! "getpt: internal error: invalid exit code from pt_chown"); | |
| 109 } | |
| 110 } | |
| 111 | |
| 112 cleanup: | |
| 113 return retval; | |
| 114 } |