Mercurial > hg > octave-kai > gnulib-hg
annotate lib/mknod.c @ 17476:6057744acd2c default tip master
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| author | Karl Berry <karl@freefriends.org> |
|---|---|
| date | Fri, 16 Aug 2013 06:32:22 -0700 (2013-08-16) |
| parents | e542fd46ad6f |
| children |
| rev | line source |
|---|---|
| 12267 | 1 /* Create a device inode. |
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e542fd46ad6f
maint: update all copyright year number ranges
Eric Blake <eblake@redhat.com>
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2 Copyright (C) 2009-2013 Free Software Foundation, Inc. |
| 12267 | 3 |
| 4 This program is free software: you can redistribute it and/or modify | |
| 5 it under the terms of the GNU General Public License as published by | |
| 6 the Free Software Foundation; either version 3 of the License, or | |
| 7 (at your option) any later version. | |
| 8 | |
| 9 This program is distributed in the hope that it will be useful, | |
| 10 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 GNU General Public License for more details. | |
| 13 | |
| 14 You should have received a copy of the GNU General Public License | |
| 15 along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
| 16 | |
| 17 /* written by Eric Blake */ | |
| 18 | |
| 19 #include <config.h> | |
| 20 | |
| 21 #include <sys/stat.h> | |
| 22 | |
| 23 #include <errno.h> | |
| 24 #include <string.h> | |
| 25 | |
| 26 #if !HAVE_MKNOD | |
| 27 /* Mingw lacks mknod; always fail with ENOSYS. */ | |
| 28 | |
| 29 int | |
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gnulib-common: prefer _GL_UNUSED over _UNUSED_PARAMETER_
Eric Blake <ebb9@byu.net>
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30 mknod (char const *name _GL_UNUSED, mode_t mode _GL_UNUSED, |
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11bc92a9e2bc
gnulib-common: prefer _GL_UNUSED over _UNUSED_PARAMETER_
Eric Blake <ebb9@byu.net>
parents:
12267
diff
changeset
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31 dev_t dev _GL_UNUSED) |
| 12267 | 32 { |
| 33 errno = ENOSYS; | |
| 34 return -1; | |
| 35 } | |
| 36 | |
| 37 #else /* HAVE_MKNOD */ | |
| 38 | |
| 39 # undef mknod | |
| 40 | |
| 41 /* Create a file system node FILE, with access permissions and file | |
| 42 type in MODE, and device type in DEV. Usually, non-root | |
| 43 applications can only create named fifos (mode includes S_IFIFO), | |
| 44 with DEV set to 0. Also work around trailing slash bugs. */ | |
| 45 | |
| 46 int | |
| 47 rpl_mknod (char const *name, mode_t mode, dev_t dev) | |
| 48 { | |
| 49 # if MKFIFO_TRAILING_SLASH_BUG | |
| 50 /* Trailing slash only makes sense for directories. Of course, | |
| 51 using mknod to create a directory is not very portable, so it may | |
| 52 still fail later on. */ | |
| 53 if (!S_ISDIR (mode)) | |
| 54 { | |
| 55 size_t len = strlen (name); | |
| 56 if (len && name[len - 1] == '/') | |
| 57 { | |
| 58 struct stat st; | |
| 59 if (stat (name, &st) == 0) | |
| 60 errno = EEXIST; | |
| 61 return -1; | |
| 62 } | |
| 63 } | |
| 64 # endif | |
| 65 # if MKNOD_FIFO_BUG | |
| 66 /* POSIX requires mknod to create fifos for non-privileged | |
| 67 processes, but BSD implementations fail with EPERM. */ | |
| 68 if (S_ISFIFO (mode) && dev == 0) | |
| 69 return mkfifo (name, mode & ~S_IFIFO); | |
| 70 # endif | |
| 71 return mknod (name, mode, dev); | |
| 72 } | |
| 73 | |
| 74 #endif /* HAVE_MKNOD */ |