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core: Add ot_gfile_create_tmp_symlink()

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In some cases we'll need the ability to create a symbolic link, then
actually import it.
This commit is contained in:
Colin Walters 2011-12-01 19:20:54 -05:00
parent 23d01d97dd
commit bb0867aeb8
2 changed files with 88 additions and 10 deletions
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90
src/libotutil/ot-gio-utils.c
View File

@ -183,6 +183,26 @@ ot_gio_splice_and_checksum (GOutputStream *out,
return ret;
}
static GString *
create_tmp_string (const char *dirpath,
const char *prefix,
const char *suffix)
{
GString *tmp_name = NULL;
if (!prefix)
prefix = "tmp-";
if (!suffix)
suffix = ".tmp";
tmp_name = g_string_new (dirpath);
g_string_append_c (tmp_name, '/');
g_string_append (tmp_name, prefix);
g_string_append (tmp_name, "XXXXXX");
g_string_append (tmp_name, suffix);
return tmp_name;
}
gboolean
ot_gfile_create_tmp (GFile *dir,
@ -203,16 +223,7 @@ ot_gfile_create_tmp (GFile *dir,
if (g_cancellable_set_error_if_cancelled (cancellable, error))
return FALSE;
if (!prefix)
prefix = "tmp-";
if (!suffix)
suffix = ".tmp";
tmp_name = g_string_new (ot_gfile_get_path_cached (dir));
g_string_append_c (tmp_name, '/');
g_string_append (tmp_name, prefix);
g_string_append (tmp_name, "XXXXXX");
g_string_append (tmp_name, suffix);
tmp_name = create_tmp_string (ot_gfile_get_path_cached (dir), prefix, suffix);
tmpfd = g_mkstemp_full (tmp_name->str, O_WRONLY | O_BINARY, mode);
if (tmpfd == -1)
@ -242,6 +253,65 @@ ot_gfile_create_tmp (GFile *dir,
return ret;
}
static char *
subst_xxxxxx (GRand *rand,
const char *string)
{
char *ret = g_strdup (string);
guint8 *xxxxxx = (guint8*)strstr (ret, "XXXXXX");
g_assert (xxxxxx != NULL);
while (*xxxxxx == 'X')
{
*xxxxxx = (guint8)g_random_int_range (0, 255);
xxxxxx++;
}
return ret;
}
gboolean
ot_gfile_create_tmp_symlink (const char *target,
GFile *dir,
const char *prefix,
const char *suffix,
GFile **out_file,
GCancellable *cancellable,
GError **error)
{
gboolean ret = FALSE;
GRand *rand = NULL;
GString *tmp_name = NULL;
char *possible_name = NULL;
rand = g_rand_new ();
tmp_name = create_tmp_string (ot_gfile_get_path_cached (dir),
prefix, suffix);
while (TRUE)
{
g_free (possible_name);
possible_name = subst_xxxxxx (rand, tmp_name->str);
if (symlink (target, possible_name) < 0)
{
if (errno == EEXIST)
continue;
ot_util_set_error_from_errno (error, errno);
goto out;
}
}
*out_file = ot_gfile_new_for_path (possible_name);
out:
g_string_free (tmp_name, TRUE);
g_free (possible_name);
if (rand)
g_rand_free (rand);
return ret;
}
gboolean
ot_gfile_merge_dirs (GFile *destination,
GFile *src,

8
src/libotutil/ot-gio-utils.h
View File

@ -59,6 +59,14 @@ gboolean ot_gfile_create_tmp (GFile *dir,
GCancellable *cancellable,
GError **error);
gboolean ot_gfile_create_tmp_symlink (const char *target,
GFile *dir,
const char *prefix,
const char *suffix,
GFile **out_file,
GCancellable *cancellable,
GError **error);
gboolean ot_gfile_merge_dirs (GFile *destination,
GFile *src,
GCancellable *cancellable,