#include "network.h"
#include "parse_opt.h"
#include "parse_dev.h"
+#include "utils.h"
#define MOUNTSFILE "/proc/mounts"
#define LINELEN (4096)
return EX_FILEIO;
}
-/*
- * Discover mount server's hostname/address by examining mount options
- *
- * Returns a pointer to a string that the caller must free, on
- * success; otherwise NULL is returned.
- */
-static char *nfs_umount_hostname(struct mount_options *options,
- char *hostname)
-{
- char *option;
-
- option = po_get(options, "mountaddr");
- if (option)
- goto out;
- option = po_get(options, "mounthost");
- if (option)
- goto out;
- option = po_get(options, "addr");
- if (option)
- goto out;
-
- return hostname;
-
-out:
- free(hostname);
- return strdup(option);
-}
-
-/*
- * Returns EX_SUCCESS if mount options and device name have been
- * parsed successfully; otherwise EX_FAIL.
- */
-static int nfs_umount_do_umnt(struct mount_options *options,
- char **hostname, char **dirname)
-{
- union {
- struct sockaddr sa;
- struct sockaddr_in s4;
- struct sockaddr_in6 s6;
- } address;
- struct sockaddr *sap = &address.sa;
- socklen_t salen = sizeof(address);
- struct pmap nfs_pmap, mnt_pmap;
- sa_family_t family;
-
- if (!nfs_options2pmap(options, &nfs_pmap, &mnt_pmap))
- return EX_FAIL;
-
- /* Skip UMNT call for vers=4 mounts */
- if (nfs_pmap.pm_vers == 4)
- return EX_SUCCESS;
-
- *hostname = nfs_umount_hostname(options, *hostname);
- if (!*hostname) {
- nfs_error(_("%s: out of memory"), progname);
- return EX_FAIL;
- }
-
- if (!nfs_mount_proto_family(options, &family))
- return 0;
- if (!nfs_lookup(*hostname, family, sap, &salen))
- /* nfs_lookup reports any errors */
- return EX_FAIL;
-
- if (nfs_advise_umount(sap, salen, &mnt_pmap, dirname) == 0)
- /* nfs_advise_umount reports any errors */
- return EX_FAIL;
-
- return EX_SUCCESS;
-}
-
-/*
- * Pick up certain mount options used during the original mount
- * from /etc/mtab. The basics include the server's IP address and
- * the server pathname of the share to unregister.
- *
- * These options might also describe the mount port, mount protocol
- * version, and transport protocol used to punch through a firewall.
- * We will need this information to get through the firewall again
- * to do the umount.
- *
- * Note that option parsing failures won't necessarily cause the
- * umount request to fail. Those values will be left zero in the
- * pmap tuple. If the GETPORT call later fails to disambiguate them,
- * then we fail.
- */
-static int nfs_umount23(const char *devname, char *string)
-{
- char *hostname, *dirname;
- struct mount_options *options;
- int result = EX_FAIL;
-
- if (!nfs_parse_devname(devname, &hostname, &dirname))
- return EX_USAGE;
-
- options = po_split(string);
- if (options) {
- result = nfs_umount_do_umnt(options, &hostname, &dirname);
- po_destroy(options);
- } else
- nfs_error(_("%s: option parsing error"), progname);
-
- free(hostname);
- free(dirname);
- return result;
-}
-
/*
* Detect NFSv4 mounts.
*
*/
static int nfs_umount_is_vers4(const struct mntentchn *mc)
{
- char buffer[LINELEN], *next;
+ struct mntentchn *pmc;
+ struct mount_options *options;
int retval;
- FILE *f;
-
- if ((f = fopen(MOUNTSFILE, "r")) == NULL) {
- fprintf(stderr, "%s: %s\n",
- MOUNTSFILE, strerror(errno));
- return -1;
- }
retval = -1;
- while (fgets(buffer, sizeof(buffer), f) != NULL) {
- char *device, *mntdir, *type, *flags;
- struct mount_options *options;
- char *line = buffer;
-
- next = strchr(line, '\n');
- if (next != NULL)
- *next = '\0';
-
- device = strtok(line, " \t");
- if (device == NULL)
- continue;
- mntdir = strtok(NULL, " \t");
- if (mntdir == NULL)
- continue;
- if (strcmp(device, mc->m.mnt_fsname) != 0 &&
- strcmp(mntdir, mc->m.mnt_dir) != 0)
+ pmc = getprocmntdirbackward(mc->m.mnt_dir, NULL);
+ if (!pmc)
+ goto not_found;
+
+ do {
+ int nlen = strlen(pmc->m.mnt_fsname);
+ /*
+ * It's possible the mount location string in /proc/mounts
+ * ends with a '/'. In this case, if the entry came from
+ * /etc/mtab, it won't have the trailing '/' so deal with
+ * it.
+ */
+ while (pmc->m.mnt_fsname[nlen - 1] == '/')
+ nlen--;
+ if (strncmp(pmc->m.mnt_fsname, mc->m.mnt_fsname, nlen) != 0)
continue;
- type = strtok(NULL, " \t");
- if (type == NULL)
- continue;
- if (strcmp(type, "nfs4") == 0)
+ if (strcmp(pmc->m.mnt_type, "nfs4") == 0)
goto out_nfs4;
- flags = strtok(NULL, " \t");
- if (flags == NULL)
- continue;
- options = po_split(flags);
+ options = po_split(pmc->m.mnt_opts);
if (options != NULL) {
unsigned long version;
- int rc;
-
- rc = nfs_nfs_version(options, &version);
+ int rc = nfs_nfs_version(options, &version);
po_destroy(options);
if (rc && version == 4)
goto out_nfs4;
}
- goto out_nfs;
- }
- if (retval == -1)
+ if (strcmp(pmc->m.mnt_type, "nfs") == 0)
+ goto out_nfs;
+ } while ((pmc = getprocmntdirbackward(mc->m.mnt_dir, pmc)) != NULL);
+
+ if (retval == -1) {
+not_found:
fprintf(stderr, "%s was not found in %s\n",
mc->m.mnt_dir, MOUNTSFILE);
-
-out:
- fclose(f);
- return retval;
+ goto out;
+ }
out_nfs4:
if (verbose)
if (verbose)
fprintf(stderr, "Legacy NFS mount point detected\n");
retval = 0;
- goto out;
+
+out:
+ return retval;
}
static struct option umount_longopts[] =
{ NULL, 0, 0, 0 }
};
-static void umount_usage(void)
-{
- printf(_("usage: %s dir [-fvnrlh]\n"), progname);
- printf(_("options:\n\t-f\t\tforce unmount\n"));
- printf(_("\t-v\tverbose\n"));
- printf(_("\t-n\tDo not update /etc/mtab\n"));
- printf(_("\t-r\tremount\n"));
- printf(_("\t-l\tlazy unmount\n"));
- printf(_("\t-h\tprint this help\n\n"));
-}
-
int nfsumount(int argc, char *argv[])
{
int c, ret;
projects / nfs-utils.git / blobdiff