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recreates symlink "default", if filesystem is gone

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This commit is contained in:
Falk Werner 2019-04-14 13:54:49 +02:00
parent aa9a3319d0
commit a2685352d0
1 changed files with 56 additions and 7 deletions
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63
lib/webfuse/adapter/impl/filesystem.c
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@ -6,7 +6,9 @@
#include <uuid/uuid.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <dirent.h>
#include <limits.h>
#include <stdlib.h>
@ -34,11 +36,48 @@ static char * wf_impl_filesystem_create_id(void)
return strdup(id);
}
static bool wf_impl_filesystem_is_link_broken(char const * path)
static bool wf_impl_filesystem_is_link_broken(char const * path, char const * id)
{
bool result = false;
char buffer[PATH_MAX];
ssize_t count = readlink(path, buffer, PATH_MAX);
return (0 < count);
if ((0 < count) && (count < PATH_MAX))
{
buffer[count] = '\0';
result = (0 == strcmp(buffer, id));
}
return result;
}
static bool wf_impl_filesystem_get_first_subdir(
char const * serviceDir,
char * buffer,
size_t buffer_size)
{
bool result = false;
DIR * dir = opendir(serviceDir);
if (NULL != dir)
{
struct dirent * entry = readdir(dir);
while (NULL != entry)
{
if ((DT_DIR == entry->d_type) && ('.' != entry->d_name[0]))
{
buffer[0] = '\0';
strncat(buffer, entry->d_name, buffer_size);
result = true;
break;
}
entry = readdir(dir);
}
closedir(dir);
}
return result;
}
static void wf_impl_filesystem_cleanup(
@ -57,16 +96,26 @@ static void wf_impl_filesystem_cleanup(
snprintf(path, PATH_MAX, "%s/%s/%s", session->mount_point, filesystem->user_data.name, filesystem->id);
rmdir(path);
char serviceDir[PATH_MAX];
snprintf(serviceDir, PATH_MAX, "%s/%s", session->mount_point, filesystem->user_data.name);
snprintf(path, PATH_MAX, "%s/%s/default", session->mount_point, filesystem->user_data.name);
rmdir(path);
if (wf_impl_filesystem_is_link_broken(path))
if (wf_impl_filesystem_is_link_broken(path, filesystem->id))
{
unlink(path);
// ToDo: recreate link, if any directory exists
char firstDir[PATH_MAX];
bool found = wf_impl_filesystem_get_first_subdir(serviceDir, firstDir, PATH_MAX);
if (found)
{
symlink(firstDir, path);
}
else
{
rmdir(serviceDir);
}
}
snprintf(path, PATH_MAX, "%s/%s", session->mount_point, filesystem->user_data.name);
rmdir(path);
free(filesystem->user_data.name);
free(filesystem->id);