gboolean
mcview_load_command_output (mcview_t * view, const char *command)
{
FILE *fp;
mcview_close_datasource (view);
open_error_pipe ();
fp = popen (command, "r");
if (fp == NULL)
{
/* Avoid two messages. Message from stderr has priority. */
mcview_display (view);
if (!close_error_pipe (mcview_is_in_panel (view) ? -1 : D_ERROR, NULL))
mcview_show_error (view, _("Cannot spawn child process"));
return FALSE;
}
/* First, check if filter produced any output */
mcview_set_datasource_stdio_pipe (view, fp);
if (!mcview_get_byte (view, 0, NULL))
{
mcview_close_datasource (view);
/* Avoid two messages. Message from stderr has priority. */
mcview_display (view);
if (!close_error_pipe (mcview_is_in_panel (view) ? -1 : D_ERROR, NULL))
mcview_show_error (view, _("Empty output from child filter"));
return FALSE;
}
else
{
/*
* At least something was read correctly. Close stderr and let
* program die if it will try to write something there.
*
* Ideally stderr should be read asynchronously to prevent programs
* from blocking (poll/select multiplexor).
*/
close_error_pipe (D_NORMAL, NULL);
}
return TRUE;
}
void
mcview_close_datasource (mcview_t * view)
{
switch (view->datasource)
{
case DS_NONE:
break;
case DS_STDIO_PIPE:
if (view->ds_stdio_pipe != NULL)
{
(void) pclose (view->ds_stdio_pipe);
mcview_display (view);
close_error_pipe (D_NORMAL, NULL);
view->ds_stdio_pipe = NULL;
}
mcview_growbuf_free (view);
break;
case DS_VFS_PIPE:
if (view->ds_vfs_pipe != -1)
{
(void) mc_close (view->ds_vfs_pipe);
view->ds_vfs_pipe = -1;
}
mcview_growbuf_free (view);
break;
case DS_FILE:
(void) mc_close (view->ds_file_fd);
view->ds_file_fd = -1;
MC_PTR_FREE (view->ds_file_data);
break;
case DS_STRING:
MC_PTR_FREE (view->ds_string_data);
break;
default:
#ifdef HAVE_ASSERT_H
assert (!"Unknown datasource type")
#endif
;
}
view->datasource = DS_NONE;
}
/*
* Main loop for reading an archive.
* Return 0 on success, -1 on error.
*/
static int
extfs_read_archive (int fstype, const char *name, struct archive **pparc)
{
FILE *extfsd;
char *buffer;
struct archive *current_archive;
char *current_file_name, *current_link_name;
if ((extfsd =
extfs_open_archive (fstype, name, ¤t_archive)) == NULL) {
message (1, MSG_ERROR, _("Cannot open %s archive\n%s"),
extfs_prefixes[fstype], name);
return -1;
}
buffer = g_malloc (4096);
while (fgets (buffer, 4096, extfsd) != NULL) {
struct stat hstat;
current_link_name = NULL;
if (vfs_parse_ls_lga
(buffer, &hstat, ¤t_file_name, ¤t_link_name)) {
struct entry *entry, *pent;
struct inode *inode;
char *p, *q, *cfn = current_file_name;
if (*cfn) {
if (*cfn == '/')
cfn++;
p = strchr (cfn, 0);
if (p != cfn && *(p - 1) == '/')
*(p - 1) = 0;
p = strrchr (cfn, '/');
if (p == NULL) {
p = cfn;
q = strchr (cfn, 0);
} else {
*(p++) = 0;
q = cfn;
}
if (S_ISDIR (hstat.st_mode)
&& (!strcmp (p, ".") || !strcmp (p, "..")))
goto read_extfs_continue;
pent =
extfs_find_entry (current_archive->root_entry, q, 1,
0);
if (pent == NULL) {
/* FIXME: Should clean everything one day */
g_free (buffer);
pclose (extfsd);
close_error_pipe (1, _("Inconsistent extfs archive"));
return -1;
}
entry = g_new (struct entry, 1);
entry->name = g_strdup (p);
entry->next_in_dir = NULL;
entry->dir = pent;
if (pent->inode->last_in_subdir) {
pent->inode->last_in_subdir->next_in_dir = entry;
pent->inode->last_in_subdir = entry;
}
if (!S_ISLNK (hstat.st_mode) && current_link_name != NULL) {
pent =
extfs_find_entry (current_archive->root_entry,
current_link_name, 0, 0);
if (pent == NULL) {
/* FIXME: Should clean everything one day */
g_free (buffer);
pclose (extfsd);
close_error_pipe (1,
_("Inconsistent extfs archive"));
return -1;
} else {
entry->inode = pent->inode;
pent->inode->nlink++;
}
} else {
inode = g_new (struct inode, 1);
entry->inode = inode;
inode->local_filename = NULL;
inode->inode = (current_archive->inode_counter)++;
inode->nlink = 1;
inode->dev = current_archive->rdev;
inode->archive = current_archive;
inode->mode = hstat.st_mode;
#ifdef HAVE_STRUCT_STAT_ST_RDEV
inode->rdev = hstat.st_rdev;
#else
inode->rdev = 0;
#endif
inode->uid = hstat.st_uid;
inode->gid = hstat.st_gid;
inode->size = hstat.st_size;
inode->mtime = hstat.st_mtime;
inode->atime = hstat.st_atime;
inode->ctime = hstat.st_ctime;
inode->first_in_subdir = NULL;
inode->last_in_subdir = NULL;
if (current_link_name != NULL
&& S_ISLNK (hstat.st_mode)) {
inode->linkname = current_link_name;
current_link_name = NULL;
} else {
if (S_ISLNK (hstat.st_mode))
inode->mode &= ~S_IFLNK; /* You *DON'T* want to do this always */
inode->linkname = NULL;
}
if (S_ISDIR (hstat.st_mode))
extfs_make_dots (entry);
}
}
read_extfs_continue:
g_free (current_file_name);
g_free (current_link_name);
}
}
g_free (buffer);
/* Check if extfs 'list' returned 0 */
if (pclose (extfsd) != 0) {
extfs_free (current_archive);
close_error_pipe (1, _("Inconsistent extfs archive"));
return -1;
}
close_error_pipe (1, NULL);
*pparc = current_archive;
return 0;
}
static FILE *
extfs_open_archive (int fstype, const char *name, struct archive **pparc)
{
static dev_t archive_counter = 0;
FILE *result;
mode_t mode;
char *cmd;
char *mc_extfsdir;
struct stat mystat;
struct archive *current_archive;
struct entry *root_entry;
char *local_name = NULL, *tmp = 0;
int uses_archive = extfs_need_archive[fstype];
if (uses_archive) {
if (mc_stat (name, &mystat) == -1)
return NULL;
if (!vfs_file_is_local (name)) {
local_name = mc_getlocalcopy (name);
if (local_name == NULL)
return NULL;
}
tmp = name_quote (name, 0);
}
mc_extfsdir = concat_dir_and_file (mc_home, "extfs" PATH_SEP_STR);
cmd =
g_strconcat (mc_extfsdir, extfs_prefixes[fstype], " list ",
local_name ? local_name : tmp, (char *) NULL);
g_free (tmp);
g_free (mc_extfsdir);
open_error_pipe ();
result = popen (cmd, "r");
g_free (cmd);
if (result == NULL) {
close_error_pipe (1, NULL);
if (local_name) {
mc_ungetlocalcopy (name, local_name, 0);
g_free(local_name);
}
return NULL;
}
#ifdef ___QNXNTO__
setvbuf (result, NULL, _IONBF, 0);
#endif
current_archive = g_new (struct archive, 1);
current_archive->fstype = fstype;
current_archive->name = name ? g_strdup (name) : NULL;
current_archive->local_name = local_name;
if (local_name != NULL)
mc_stat (local_name, ¤t_archive->local_stat);
current_archive->inode_counter = 0;
current_archive->fd_usage = 0;
current_archive->rdev = archive_counter++;
current_archive->next = first_archive;
first_archive = current_archive;
mode = mystat.st_mode & 07777;
if (mode & 0400)
mode |= 0100;
if (mode & 0040)
mode |= 0010;
if (mode & 0004)
mode |= 0001;
mode |= S_IFDIR;
root_entry = extfs_generate_entry (current_archive, "/", NULL, mode);
root_entry->inode->uid = mystat.st_uid;
root_entry->inode->gid = mystat.st_gid;
root_entry->inode->atime = mystat.st_atime;
root_entry->inode->ctime = mystat.st_ctime;
root_entry->inode->mtime = mystat.st_mtime;
current_archive->root_entry = root_entry;
*pparc = current_archive;
return result;
}
void
mcview_growbuf_read_until (mcview_t * view, off_t ofs)
{
ssize_t nread;
byte *p;
size_t bytesfree;
gboolean short_read;
assert (view->growbuf_in_use);
if (view->growbuf_finished)
return;
short_read = FALSE;
while (mcview_growbuf_filesize (view) < ofs || short_read)
{
if (view->growbuf_lastindex == VIEW_PAGE_SIZE)
{
/* Append a new block to the growing buffer */
byte *newblock = g_try_malloc (VIEW_PAGE_SIZE);
if (newblock == NULL)
return;
g_ptr_array_add (view->growbuf_blockptr, newblock);
view->growbuf_lastindex = 0;
}
p = g_ptr_array_index (view->growbuf_blockptr,
view->growbuf_blockptr->len - 1) + view->growbuf_lastindex;
bytesfree = VIEW_PAGE_SIZE - view->growbuf_lastindex;
if (view->datasource == DS_STDIO_PIPE)
{
nread = fread (p, 1, bytesfree, view->ds_stdio_pipe);
if (nread == 0)
{
view->growbuf_finished = TRUE;
(void) pclose (view->ds_stdio_pipe);
mcview_display (view);
close_error_pipe (D_NORMAL, NULL);
view->ds_stdio_pipe = NULL;
return;
}
}
else
{
assert (view->datasource == DS_VFS_PIPE);
do
{
nread = mc_read (view->ds_vfs_pipe, p, bytesfree);
}
while (nread == -1 && errno == EINTR);
if (nread == -1 || nread == 0)
{
view->growbuf_finished = TRUE;
(void) mc_close (view->ds_vfs_pipe);
view->ds_vfs_pipe = -1;
return;
}
}
short_read = ((size_t) nread < bytesfree);
view->growbuf_lastindex += nread;
}
}
static int
sfs_vfmake (struct vfs_class *me, const char *name, char *cache)
{
char *inpath, *op;
int w;
char pad[10240];
char *s, *t = pad;
int was_percent = 0;
char *pname; /* name of parent archive */
char *pqname; /* name of parent archive, quoted */
pname = g_strdup (name);
vfs_split (pname, &inpath, &op);
if ((w = (*me->which) (me, op)) == -1)
vfs_die ("This cannot happen... Hopefully.\n");
if (!(sfs_flags[w] & F_1) && strcmp (pname, "/")) {
g_free (pname);
return -1;
}
/* if ((sfs_flags[w] & F_2) || (!inpath) || (!*inpath)); else return -1; */
if (!(sfs_flags[w] & F_NOLOCALCOPY)) {
s = mc_getlocalcopy (pname);
if (!s) {
g_free (pname);
return -1;
}
pqname = name_quote (s, 0);
g_free (s);
} else {
pqname = name_quote (pname, 0);
}
g_free (pname);
#define COPY_CHAR \
if ((size_t) (t-pad) > sizeof(pad)) { \
g_free (pqname); \
return -1; \
} \
else \
*t++ = *s;
#define COPY_STRING(a) \
if ((t-pad)+strlen(a)>sizeof(pad)) { \
g_free (pqname); \
return -1; \
} else { \
strcpy (t, a); \
t+= strlen(a); \
}
for (s = sfs_command[w]; *s; s++) {
if (was_percent) {
const char *ptr = NULL;
was_percent = 0;
switch (*s) {
case '1':
ptr = pqname;
break;
case '2':
ptr = op + strlen (sfs_prefix[w]);
break;
case '3':
ptr = cache;
break;
case '%':
COPY_CHAR;
continue;
}
COPY_STRING (ptr);
} else {
if (*s == '%')
was_percent = 1;
else
COPY_CHAR;
}
}
g_free (pqname);
open_error_pipe ();
if (my_system (EXECUTE_AS_SHELL, "/bin/sh", pad)) {
close_error_pipe (1, NULL);
return -1;
}
close_error_pipe (0, NULL);
return 0; /* OK */
}
