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author | Lorry Tar Creator <lorry-tar-importer@lorry> | 2016-01-20 10:55:18 +0000 |
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committer | Lorry Tar Creator <lorry-tar-importer@lorry> | 2016-01-20 10:55:18 +0000 |
commit | 70e9163c9c18e995515598085cb824e554eb7ae7 (patch) | |
tree | a42dc8b2a6c031354bf31472de888bfc8a060132 /lib/mknod.c | |
parent | cbf5993c43f49281173f185863577d86bfac6eae (diff) | |
download | coreutils-tarball-70e9163c9c18e995515598085cb824e554eb7ae7.tar.gz |
coreutils-8.25HEADcoreutils-8.25master
Diffstat (limited to 'lib/mknod.c')
-rw-r--r-- | lib/mknod.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/lib/mknod.c b/lib/mknod.c new file mode 100644 index 0000000..26e80cc --- /dev/null +++ b/lib/mknod.c @@ -0,0 +1,74 @@ +/* Create a device inode. + Copyright (C) 2009-2016 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +/* written by Eric Blake */ + +#include <config.h> + +#include <sys/stat.h> + +#include <errno.h> +#include <string.h> + +#if !HAVE_MKNOD +/* Mingw lacks mknod; always fail with ENOSYS. */ + +int +mknod (char const *name _GL_UNUSED, mode_t mode _GL_UNUSED, + dev_t dev _GL_UNUSED) +{ + errno = ENOSYS; + return -1; +} + +#else /* HAVE_MKNOD */ + +# undef mknod + +/* Create a file system node FILE, with access permissions and file + type in MODE, and device type in DEV. Usually, non-root + applications can only create named fifos (mode includes S_IFIFO), + with DEV set to 0. Also work around trailing slash bugs. */ + +int +rpl_mknod (char const *name, mode_t mode, dev_t dev) +{ +# if MKFIFO_TRAILING_SLASH_BUG + /* Trailing slash only makes sense for directories. Of course, + using mknod to create a directory is not very portable, so it may + still fail later on. */ + if (!S_ISDIR (mode)) + { + size_t len = strlen (name); + if (len && name[len - 1] == '/') + { + struct stat st; + if (stat (name, &st) == 0) + errno = EEXIST; + return -1; + } + } +# endif +# if MKNOD_FIFO_BUG + /* POSIX requires mknod to create fifos for non-privileged + processes, but BSD implementations fail with EPERM. */ + if (S_ISFIFO (mode) && dev == 0) + return mkfifo (name, mode & ~S_IFIFO); +# endif + return mknod (name, mode, dev); +} + +#endif /* HAVE_MKNOD */ |