diff options
Diffstat (limited to 'lib/libspl/os/freebsd/mnttab.c')
| -rw-r--r-- | lib/libspl/os/freebsd/mnttab.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/lib/libspl/os/freebsd/mnttab.c b/lib/libspl/os/freebsd/mnttab.c new file mode 100644 index 000000000..5b9e6429d --- /dev/null +++ b/lib/libspl/os/freebsd/mnttab.c @@ -0,0 +1,216 @@ +/* + * Copyright (c) 2006 Pawel Jakub Dawidek <[email protected]> + * All rights reserved. + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHORS 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 AUTHORS 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. + */ + +/* + * This file implements Solaris compatible getmntany() and hasmntopt() + * functions. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/mount.h> +#include <sys/mntent.h> +#include <sys/mnttab.h> + +#include <ctype.h> +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +static char * +mntopt(char **p) +{ + char *cp = *p; + char *retstr; + + while (*cp && isspace(*cp)) + cp++; + + retstr = cp; + while (*cp && *cp != ',') + cp++; + + if (*cp) { + *cp = '\0'; + cp++; + } + + *p = cp; + return (retstr); +} + +char * +hasmntopt(struct mnttab *mnt, char *opt) +{ + char tmpopts[MNT_LINE_MAX]; + char *f, *opts = tmpopts; + + if (mnt->mnt_mntopts == NULL) + return (NULL); + (void) strcpy(opts, mnt->mnt_mntopts); + f = mntopt(&opts); + for (; *f; f = mntopt(&opts)) { + if (strncmp(opt, f, strlen(opt)) == 0) + return (f - tmpopts + mnt->mnt_mntopts); + } + return (NULL); +} + +static void +optadd(char *mntopts, size_t size, const char *opt) +{ + + if (mntopts[0] != '\0') + strlcat(mntopts, ",", size); + strlcat(mntopts, opt, size); +} + +void +statfs2mnttab(struct statfs *sfs, struct mnttab *mp) +{ + static char mntopts[MNTMAXSTR]; + long flags; + + mntopts[0] = '\0'; + + flags = sfs->f_flags; +#define OPTADD(opt) optadd(mntopts, sizeof (mntopts), (opt)) + if (flags & MNT_RDONLY) + OPTADD(MNTOPT_RO); + else + OPTADD(MNTOPT_RW); + if (flags & MNT_NOSUID) + OPTADD(MNTOPT_NOSETUID); + else + OPTADD(MNTOPT_SETUID); + if (flags & MNT_UPDATE) + OPTADD(MNTOPT_REMOUNT); + if (flags & MNT_NOATIME) + OPTADD(MNTOPT_NOATIME); + else + OPTADD(MNTOPT_ATIME); + OPTADD(MNTOPT_NOXATTR); + if (flags & MNT_NOEXEC) + OPTADD(MNTOPT_NOEXEC); + else + OPTADD(MNTOPT_EXEC); +#undef OPTADD + mp->mnt_special = strdup(sfs->f_mntfromname); + mp->mnt_mountp = strdup(sfs->f_mntonname); + mp->mnt_fstype = strdup(sfs->f_fstypename); + mp->mnt_mntopts = strdup(mntopts); +} + +static struct statfs *gsfs = NULL; +static int allfs = 0; + +static int +statfs_init(void) +{ + struct statfs *sfs; + int error; + + if (gsfs != NULL) { + free(gsfs); + gsfs = NULL; + } + allfs = getfsstat(NULL, 0, MNT_WAIT); + if (allfs == -1) + goto fail; + gsfs = malloc(sizeof (gsfs[0]) * allfs * 2); + if (gsfs == NULL) + goto fail; + allfs = getfsstat(gsfs, (long)(sizeof (gsfs[0]) * allfs * 2), + MNT_WAIT); + if (allfs == -1) + goto fail; + sfs = realloc(gsfs, allfs * sizeof (gsfs[0])); + if (sfs != NULL) + gsfs = sfs; + return (0); +fail: + error = errno; + if (gsfs != NULL) + free(gsfs); + gsfs = NULL; + allfs = 0; + return (error); +} + +int +getmntany(FILE *fd __unused, struct mnttab *mgetp, struct mnttab *mrefp) +{ + // struct statfs *sfs; + int i, error; + + error = statfs_init(); + if (error != 0) + return (error); + + for (i = 0; i < allfs; i++) { + if (mrefp->mnt_special != NULL && + strcmp(mrefp->mnt_special, gsfs[i].f_mntfromname) != 0) { + continue; + } + if (mrefp->mnt_mountp != NULL && + strcmp(mrefp->mnt_mountp, gsfs[i].f_mntonname) != 0) { + continue; + } + if (mrefp->mnt_fstype != NULL && + strcmp(mrefp->mnt_fstype, gsfs[i].f_fstypename) != 0) { + continue; + } + statfs2mnttab(&gsfs[i], mgetp); + return (0); + } + return (-1); +} + +int +getmntent(FILE *fp, struct mnttab *mp) +{ + // struct statfs *sfs; + int error, nfs; + + nfs = (int)lseek(fileno(fp), 0, SEEK_CUR); + if (nfs == -1) + return (errno); + /* If nfs is 0, we want to refresh out cache. */ + if (nfs == 0 || gsfs == NULL) { + error = statfs_init(); + if (error != 0) + return (error); + } + if (nfs >= allfs) + return (-1); + statfs2mnttab(&gsfs[nfs], mp); + if (lseek(fileno(fp), 1, SEEK_CUR) == -1) + return (errno); + return (0); +} |