forked from enlightenment/efl
528 lines
13 KiB
C
528 lines
13 KiB
C
#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifndef USE_UNSTABLE_LIBMOUNT_API
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# define USE_UNSTABLE_LIBMOUNT_API 1
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#endif
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <Ecore.h>
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#include <Eeze.h>
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#include <Eeze_Disk.h>
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#ifdef HAVE_EEZE_MOUNT
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# include <libmount.h>
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#endif
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#include "eeze_udev_private.h"
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#include "eeze_disk_private.h"
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/*
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*
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* PRIVATE
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*
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*/
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static struct libmnt_optmap eeze_optmap[] =
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{
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{ "loop[=]", EEZE_DISK_MOUNTOPT_LOOP, 0 },
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{ "utf8", EEZE_DISK_MOUNTOPT_UTF8, 0 },
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{ "noexec", EEZE_DISK_MOUNTOPT_NOEXEC, 0 },
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{ "nosuid", EEZE_DISK_MOUNTOPT_NOSUID, 0 },
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{ "remount", EEZE_DISK_MOUNTOPT_REMOUNT, 0 },
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{ "uid[=]", EEZE_DISK_MOUNTOPT_UID, 0 },
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{ "nodev", EEZE_DISK_MOUNTOPT_NODEV, 0 },
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{ NULL, 0, 0 }
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};
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typedef struct libmnt_table libmnt_table;
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typedef struct libmnt_fs libmnt_fs;
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typedef struct libmnt_cache libmnt_cache;
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static Ecore_File_Monitor *_fstab_mon = NULL;
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static Eina_Bool _watching = EINA_FALSE;
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static Eina_Bool _fstab_scan_active = EINA_FALSE;
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static libmnt_cache *_eeze_mount_mtab_cache = NULL;
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static libmnt_cache *_eeze_mount_fstab_cache = NULL;
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static libmnt_table *_eeze_mount_mtab = NULL;
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static libmnt_table *_eeze_mount_fstab = NULL;
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extern Eina_List *_eeze_disks;
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static Ecore_Fd_Handler *_mountinfo_fdh = NULL;
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static int _mountinfo = -1;
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static libmnt_table *_eeze_mount_tab_parse(const char *filename);
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static void _eeze_mount_tab_watcher(void *data, Ecore_File_Monitor *mon EINA_UNUSED, Ecore_File_Event event EINA_UNUSED, const char *path);
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static int
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_eeze_mount_tab_parse_errcb(libmnt_table *tab EINA_UNUSED, const char *filename, int line)
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{
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ERR("%s:%d: could not parse line!", filename, line); /* most worthless error reporting ever. */
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return -1;
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}
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/*
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* I could use mnt_new_table_from_file() but this way gives much more detailed output
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* on failure so why not
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*/
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static libmnt_table *
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_eeze_mount_tab_parse(const char *filename)
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{
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libmnt_table *tab;
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if (!(tab = mnt_new_table())) return NULL;
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if (mnt_table_set_parser_errcb(tab, _eeze_mount_tab_parse_errcb))
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{
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ERR("Alloc!");
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mnt_free_table(tab);
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return NULL;
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}
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if (!mnt_table_parse_file(tab, filename))
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return tab;
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mnt_free_table(tab);
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return NULL;
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}
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static void
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_eeze_mount_tab_watcher(void *data, Ecore_File_Monitor *mon EINA_UNUSED, Ecore_File_Event event EINA_UNUSED, const char *path)
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{
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libmnt_table *bak;
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if (_fstab_scan_active)
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/* prevent scans from triggering a scan */
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return;
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bak = _eeze_mount_mtab;
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_eeze_mount_mtab = _eeze_mount_tab_parse(path);
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if (!_eeze_mount_mtab)
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{
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ERR("Could not parse %s! keeping old tab...", path);
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goto error;
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}
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mnt_free_table(bak);
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if (data)
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{
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mnt_free_cache(_eeze_mount_mtab_cache);
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_eeze_mount_mtab_cache = mnt_new_cache();
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mnt_table_set_cache(_eeze_mount_mtab, _eeze_mount_mtab_cache);
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}
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else
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{
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mnt_free_cache(_eeze_mount_fstab_cache);
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_eeze_mount_fstab_cache = mnt_new_cache();
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mnt_table_set_cache(_eeze_mount_fstab, _eeze_mount_fstab_cache);
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}
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return;
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error:
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mnt_free_table(_eeze_mount_mtab);
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_eeze_mount_mtab = bak;
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}
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/* on tab change, check differences
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* based on code from findmnt
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*/
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static Eina_Bool
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_eeze_mount_fdh(void *d EINA_UNUSED, Ecore_Fd_Handler *fdh EINA_UNUSED)
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{
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libmnt_table *tb_new;
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libmnt_fs *old, *new;
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int change;
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struct libmnt_iter *itr = NULL;
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struct libmnt_tabdiff *diff = NULL;
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tb_new = mnt_new_table();
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EINA_SAFETY_ON_NULL_RETURN_VAL(tb_new, ECORE_CALLBACK_RENEW);
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EINA_SAFETY_ON_TRUE_GOTO(mnt_table_set_parser_errcb(tb_new, _eeze_mount_tab_parse_errcb), err);
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itr = mnt_new_iter(MNT_ITER_BACKWARD);
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EINA_SAFETY_ON_NULL_GOTO(itr, err);
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diff = mnt_new_tabdiff();
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EINA_SAFETY_ON_NULL_GOTO(diff, err);
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if (mnt_table_parse_file(tb_new, "/proc/self/mountinfo"))
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{
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ERR("PARSING FAILED FOR /proc/self/mountinfo! THIS IS WEIRD!");
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goto err;
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}
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change = mnt_diff_tables(diff, _eeze_mount_mtab, tb_new);
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if (change < 0)
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{
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ERR("DIFFING FAILED FOR /proc/self/mountinfo! THIS IS ALSO WEIRD!");
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goto err;
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}
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if (!change) goto err;
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while (!mnt_tabdiff_next_change(diff, itr, &old, &new, &change))
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{
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const char *src;
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Eeze_Disk *disk;
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Eina_Bool found = EINA_FALSE;
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Eeze_Event_Disk_Mount *e;
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Eina_List *l;
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src = mnt_fs_get_source(new);
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if (!src) continue;
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EINA_LIST_FOREACH(_eeze_disks, l, disk)
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{
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if (!strcmp(src, eeze_disk_devpath_get(disk)))
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{
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found = EINA_TRUE;
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break;
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}
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}
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if (!found) continue;
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switch (change)
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{
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case MNT_TABDIFF_MOUNT:
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disk->mounted = EINA_TRUE;
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eina_stringshare_replace(&disk->mount_point, mnt_fs_get_target(new));
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if (disk->mount_status) break;
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e = malloc(sizeof(Eeze_Event_Disk_Mount));
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if (e)
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{
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e->disk = disk;
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ecore_event_add(EEZE_EVENT_DISK_MOUNT, e, NULL, NULL);
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}
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break;
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case MNT_TABDIFF_UMOUNT:
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if (!mnt_fs_get_target(new))
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disk->mounted = EINA_FALSE;
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eina_stringshare_replace(&disk->mount_point, NULL);
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if (disk->mount_status) break;
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e = malloc(sizeof(Eeze_Event_Disk_Mount));
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if (e)
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{
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e->disk = disk;
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ecore_event_add(EEZE_EVENT_DISK_UNMOUNT, e, NULL, NULL);
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}
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break;
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/* anything could have happened here, send both events to flush */
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case MNT_TABDIFF_REMOUNT:
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case MNT_TABDIFF_MOVE:
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if (!mnt_fs_get_target(new))
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disk->mounted = EINA_FALSE;
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eina_stringshare_replace(&disk->mount_point, mnt_fs_get_target(new));
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if (disk->mount_status) break;
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e = malloc(sizeof(Eeze_Event_Disk_Mount));
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if (e)
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{
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e->disk = disk;
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ecore_event_add(EEZE_EVENT_DISK_UNMOUNT, e, NULL, NULL);
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}
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e = malloc(sizeof(Eeze_Event_Disk_Mount));
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if (e)
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{
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e->disk = disk;
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ecore_event_add(EEZE_EVENT_DISK_MOUNT, e, NULL, NULL);
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}
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default:
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break;
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}
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}
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mnt_free_cache(_eeze_mount_mtab_cache);
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_eeze_mount_mtab_cache = mnt_new_cache();
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mnt_table_set_cache(_eeze_mount_mtab, _eeze_mount_mtab_cache);
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mnt_free_table(_eeze_mount_mtab);
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_eeze_mount_mtab = tb_new;
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return ECORE_CALLBACK_RENEW;
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err:
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if (tb_new) mnt_free_table(tb_new);
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if (itr) mnt_free_iter(itr);
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if (diff) mnt_free_tabdiff(diff);
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return ECORE_CALLBACK_RENEW;
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}
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/*
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*
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* INVISIBLE
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*
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*/
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Eina_Bool
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eeze_libmount_init(void)
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{
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/* placeholder */
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return EINA_TRUE;
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}
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void
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eeze_libmount_shutdown(void)
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{
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if (_eeze_mount_fstab)
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{
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mnt_free_table(_eeze_mount_fstab);
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mnt_free_cache(_eeze_mount_fstab_cache);
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}
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if (_eeze_mount_mtab)
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{
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mnt_free_table(_eeze_mount_mtab);
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mnt_free_cache(_eeze_mount_mtab_cache);
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}
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eeze_mount_tabs_unwatch();
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}
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unsigned long
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eeze_disk_libmount_opts_get(Eeze_Disk *disk)
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{
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libmnt_fs *mnt;
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const char *opts;
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unsigned long f = 0;
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if (!eeze_mount_mtab_scan() || !eeze_mount_fstab_scan())
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return 0;
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mnt = mnt_table_find_tag(_eeze_mount_mtab, "UUID", eeze_disk_uuid_get(disk), MNT_ITER_BACKWARD);
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if (!mnt)
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mnt = mnt_table_find_tag(_eeze_mount_fstab, "UUID", eeze_disk_uuid_get(disk), MNT_ITER_BACKWARD);
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if (!mnt) return 0;
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opts = mnt_fs_get_fs_options(mnt);
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if (!opts) return 0;
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if (!mnt_optstr_get_flags(opts, &f, eeze_optmap)) return 0;
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return f;
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}
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/*
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* helper function to return whether a disk is mounted
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*/
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Eina_Bool
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eeze_disk_libmount_mounted_get(Eeze_Disk *disk)
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{
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libmnt_fs *mnt;
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if (!disk)
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return EINA_FALSE;
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if (!eeze_mount_mtab_scan() || !eeze_mount_fstab_scan())
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return EINA_FALSE;
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mnt = mnt_table_find_source(_eeze_mount_mtab, eeze_disk_devpath_get(disk), MNT_ITER_BACKWARD);
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if (!mnt)
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{
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disk->mounted = EINA_FALSE;
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return EINA_FALSE;
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}
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eina_stringshare_replace(&disk->mount_point, mnt_fs_get_target(mnt));
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disk->mounted = EINA_TRUE;
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return EINA_TRUE;
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}
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/*
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* helper function to return the device that is mounted at a mount point
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*/
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const char *
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eeze_disk_libmount_mp_find_source(const char *mount_point)
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{
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libmnt_fs *mnt;
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if (!mount_point)
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return NULL;
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if (!eeze_mount_mtab_scan() || !eeze_mount_fstab_scan())
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return NULL;
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mnt = mnt_table_find_target(_eeze_mount_mtab, mount_point, MNT_ITER_BACKWARD);
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if (!mnt)
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mnt = mnt_table_find_target(_eeze_mount_fstab, mount_point, MNT_ITER_BACKWARD);
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if (!mnt)
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return NULL;
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return mnt_fs_get_source(mnt);
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}
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/*
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* helper function to return a mount point from a uuid
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*/
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const char *
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eeze_disk_libmount_mp_lookup_by_uuid(const char *uuid)
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{
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libmnt_fs *mnt;
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if (!uuid)
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return NULL;
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if (!eeze_mount_mtab_scan() || !eeze_mount_fstab_scan())
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return NULL;
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mnt = mnt_table_find_tag(_eeze_mount_fstab, "UUID", uuid, MNT_ITER_BACKWARD);
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if (!mnt)
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return NULL;
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return mnt_fs_get_target(mnt);
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}
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/*
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* helper function to return a mount point from a label
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*/
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const char *
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eeze_disk_libmount_mp_lookup_by_label(const char *label)
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{
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libmnt_fs *mnt;
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if (!label)
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return NULL;
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if (!eeze_mount_mtab_scan() || !eeze_mount_fstab_scan())
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return NULL;
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mnt = mnt_table_find_tag(_eeze_mount_fstab, "LABEL", label, MNT_ITER_BACKWARD);
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if (!mnt)
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return NULL;
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return mnt_fs_get_target(mnt);
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}
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/*
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* helper function to return a mount point from a /dev/ path
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*/
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const char *
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eeze_disk_libmount_mp_lookup_by_devpath(const char *devpath)
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{
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libmnt_fs *mnt;
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if (!devpath)
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return NULL;
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if (!eeze_mount_mtab_scan() || !eeze_mount_fstab_scan())
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return NULL;
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mnt = mnt_table_find_srcpath(_eeze_mount_mtab, devpath, MNT_ITER_BACKWARD);
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if (!mnt)
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mnt = mnt_table_find_srcpath(_eeze_mount_fstab, devpath, MNT_ITER_BACKWARD);
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if (!mnt)
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return NULL;
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return mnt_fs_get_target(mnt);
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}
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/*
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*
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* API
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*
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*/
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EAPI Eina_Bool
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eeze_mount_tabs_watch(void)
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{
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libmnt_table *bak;
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if (_watching)
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return EINA_TRUE;
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bak = _eeze_mount_tab_parse("/proc/self/mountinfo");
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EINA_SAFETY_ON_NULL_GOTO(bak, error);
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mnt_free_table(_eeze_mount_mtab);
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_eeze_mount_mtab = bak;
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bak = _eeze_mount_tab_parse("/etc/fstab");
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EINA_SAFETY_ON_NULL_GOTO(bak, error);
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mnt_free_table(_eeze_mount_fstab);
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_eeze_mount_fstab = bak;
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_eeze_mount_mtab_cache = mnt_new_cache();
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mnt_table_set_cache(_eeze_mount_mtab, _eeze_mount_mtab_cache);
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_eeze_mount_fstab_cache = mnt_new_cache();
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mnt_table_set_cache(_eeze_mount_fstab, _eeze_mount_fstab_cache);
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_mountinfo = open("/proc/self/mountinfo", O_RDONLY, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
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if (_mountinfo < 0) goto error;
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if (fcntl(_mountinfo, F_SETFL, O_NONBLOCK) < 0) goto error;
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_mountinfo_fdh = ecore_main_fd_handler_file_add(_mountinfo, ECORE_FD_ERROR, _eeze_mount_fdh, NULL, NULL, NULL);
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if (!_mountinfo_fdh) goto error;
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_fstab_mon = ecore_file_monitor_add("/etc/fstab", _eeze_mount_tab_watcher, NULL);
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_watching = EINA_TRUE;
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return EINA_TRUE;
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error:
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if (_mountinfo >= 0) close(_mountinfo);
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_mountinfo = -1;
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if (!_eeze_mount_mtab)
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ERR("Could not parse /proc/self/mountinfo!");
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else
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{
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ERR("Could not parse /etc/fstab!");
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mnt_free_table(_eeze_mount_mtab);
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}
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_eeze_mount_mtab = _eeze_mount_fstab = NULL;
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return EINA_FALSE;
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}
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EAPI void
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eeze_mount_tabs_unwatch(void)
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{
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if (!_watching)
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return;
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ecore_main_fd_handler_del(_mountinfo_fdh);
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ecore_file_monitor_del(_fstab_mon);
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close(_mountinfo);
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_mountinfo = -1;
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_fstab_mon = NULL;
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_watching = EINA_FALSE;
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}
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EAPI Eina_Bool
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eeze_mount_mtab_scan(void)
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{
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libmnt_table *bak;
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if (_watching)
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return EINA_TRUE;
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bak = _eeze_mount_tab_parse("/proc/self/mountinfo");
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if (!bak)
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goto error;
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if (_eeze_mount_mtab)
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{
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mnt_free_table(_eeze_mount_mtab);
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mnt_free_cache(_eeze_mount_mtab_cache);
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}
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_eeze_mount_mtab = bak;
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_eeze_mount_mtab_cache = mnt_new_cache();
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mnt_table_set_cache(_eeze_mount_mtab, _eeze_mount_mtab_cache);
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return EINA_TRUE;
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error:
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return EINA_FALSE;
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}
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EAPI Eina_Bool
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eeze_mount_fstab_scan(void)
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|
{
|
|
libmnt_table *bak;
|
|
if (_watching)
|
|
return EINA_TRUE;
|
|
|
|
bak = _eeze_mount_tab_parse("/etc/fstab");
|
|
if (!bak)
|
|
goto error;
|
|
if (_eeze_mount_fstab)
|
|
{
|
|
mnt_free_table(_eeze_mount_fstab);
|
|
mnt_free_cache(_eeze_mount_fstab_cache);
|
|
}
|
|
_eeze_mount_fstab = bak;
|
|
_eeze_mount_fstab_cache = mnt_new_cache();
|
|
mnt_table_set_cache(_eeze_mount_fstab, _eeze_mount_fstab_cache);
|
|
|
|
return EINA_TRUE;
|
|
|
|
error:
|
|
return EINA_FALSE;
|
|
}
|