diff options
Diffstat (limited to 'conf/mtab/mtab_aix.c')
| -rw-r--r-- | conf/mtab/mtab_aix.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/conf/mtab/mtab_aix.c b/conf/mtab/mtab_aix.c new file mode 100644 index 000000000000..072adc74151d --- /dev/null +++ b/conf/mtab/mtab_aix.c @@ -0,0 +1,178 @@ +/* + * Copyright (c) 1997-2014 Erez Zadok + * Copyright (c) 1990 Jan-Simon Pendry + * Copyright (c) 1990 Imperial College of Science, Technology & Medicine + * Copyright (c) 1990 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Jan-Simon Pendry at Imperial College, London. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * + * File: am-utils/conf/mtab/mtab_aix.c + * + */ + +/* + * AIX systems don't write their mount tables on a file. Instead, they + * use a (better) system where the kernel keeps this state, and you access + * the mount tables via a known interface. + */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif /* HAVE_CONFIG_H */ +#include <am_defs.h> +#include <amu.h> + +/* + * These were missing external definitions from old AIX's headers. They + * appear to be available in <sys/vmount.h> on AIX 5.3, and possibly + * earlier. Hence I commented this out. + */ +#ifndef HAVE_EXTERN_MNTCTL +extern int mntctl(int cmd, int size, voidp buf); +#endif /* not HAVE_EXTERN_MNTCTL */ + + +static mntent_t * +mnt_dup(struct vmount *mp) +{ + mntent_t *new_mp = ALLOC(mntent_t); + char *ty; + char *fsname = xstrdup(vmt2dataptr(mp, VMT_OBJECT)); + + new_mp->mnt_dir = strdup(vmt2dataptr(mp, VMT_STUB)); + new_mp->mnt_opts = strdup(vmt2dataptr(mp, VMT_ARGS)); + + switch (mp->vmt_gfstype) { + + case MOUNT_TYPE_UFS: + ty = MNTTAB_TYPE_UFS; + new_mp->mnt_fsname = xstrdup(fsname); + break; + + case MOUNT_TYPE_NFS: + ty = MNTTAB_TYPE_NFS; + new_mp->mnt_fsname = str3cat((char *) NULL, + vmt2dataptr(mp, VMT_HOSTNAME), ":", + fsname); + break; + +#ifdef HAVE_FS_NFS3 + case MOUNT_TYPE_NFS3: + ty = MNTTAB_TYPE_NFS3; + new_mp->mnt_fsname = str3cat((char *) NULL, + vmt2dataptr(mp, VMT_HOSTNAME), ":", + fsname); + break; +#endif /* HAVE_FS_NFS3 */ + + default: + ty = "unknown"; + new_mp->mnt_fsname = xstrdup(fsname); + break; + + } + + new_mp->mnt_type = xstrdup(ty); + /* store the VFS ID for uvmount() */ + new_mp->mnt_passno = mp->vmt_vfsnumber; + new_mp->mnt_freq = 0; + + XFREE(fsname); + + return new_mp; +} + + +/* + * Read a mount table into memory + */ +mntlist * +read_mtab(char *fs, const char *mnttabname) +{ + mntlist **mpp, *mhp; + int i; + char *mntinfo = NULL, *cp; + struct vmount *vp; + int ret; + int maxtry = 10; /* maximum number of times to try mntctl */ + + /* + * Figure out size of mount table and allocate space for a copy. Then get + * mount table for real. We repeat this loop at most 10 times to minimze + * the chance of a race condition (something gets un/mounted in between + * calls to mntctl() + */ + i = sizeof(int); + do { + if (mntinfo) + XFREE(mntinfo); + mntinfo = xmalloc(i); + ret = mntctl(MCTL_QUERY, i, mntinfo); + if (ret == 0) + i = *(int*) mntinfo; + if (--maxtry <= 0) { + plog(XLOG_ERROR, "mntctl: could not get a stable result"); + ret = -1; + errno = EINVAL; + break; + } + } while (ret == 0); + if (ret < 0) { + plog(XLOG_ERROR, "mntctl: %m"); + goto out; + } + + mpp = &mhp; + for (i = 0, cp = mntinfo; i < ret; i++, cp += vp->vmt_length) { + vp = (struct vmount *) cp; + + /* + * Allocate a new slot + */ + *mpp = ALLOC(struct mntlist); + + /* + * Copy the data returned by mntctl + */ + (*mpp)->mnt = mnt_dup(vp); + + /* + * Move to next pointer + */ + mpp = &(*mpp)->mnext; + } + + *mpp = NULL; + +out: + if (mntinfo) + XFREE(mntinfo); + return mhp; +} |