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New function, suggested by Havoc earlier this month. (g_mkstemp): Use only

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2000-11-11  Tor Lillqvist  <tml@iki.fi>

	* gfileutils.c (g_file_open_tmp): New function, suggested by Havoc
	earlier this month.
	(g_mkstemp): Use only one case for letters in temp file name, as
	this will be used on systems with case-insensitive file systems.

	* testglib.c (main): Test g_mkstemp() and g_file_open_tmp().
This commit is contained in:
Tor Lillqvist
2000-11-10 23:43:33 +00:00
committed by Tor Lillqvist
parent c46b9f34e4
commit 997215e747
14 changed files with 428 additions and 26 deletions
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118
gfileutils.c
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@@ -518,7 +518,7 @@ g_file_get_contents (const gchar *filename,
* end in "XXXXXX". The X string will be modified to form the name
* of a file that didn't exist.
*
* Return value: A file handle (as from open()) to the file file
* Return value: A file handle (as from open()) to the file
* opened for reading and writing. The file is opened in binary mode
* on platforms where there is a difference. The file handle should be
* closed with close(). In case of errors, -1 is returned.
@@ -534,7 +534,8 @@ g_mkstemp (char *tmpl)
char *XXXXXX;
int count, fd;
static const char letters[] =
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
"ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
static const int NLETTERS = sizeof (letters) - 1;
glong value;
GTimeVal tv;
@@ -554,17 +555,17 @@ g_mkstemp (char *tmpl)
glong v = value;
/* Fill in the random bits. */
XXXXXX[0] = letters[v % 62];
v /= 62;
XXXXXX[1] = letters[v % 62];
v /= 62;
XXXXXX[2] = letters[v % 62];
v /= 62;
XXXXXX[3] = letters[v % 62];
v /= 62;
XXXXXX[4] = letters[v % 62];
v /= 62;
XXXXXX[5] = letters[v % 62];
XXXXXX[0] = letters[v % NLETTERS];
v /= NLETTERS;
XXXXXX[1] = letters[v % NLETTERS];
v /= NLETTERS;
XXXXXX[2] = letters[v % NLETTERS];
v /= NLETTERS;
XXXXXX[3] = letters[v % NLETTERS];
v /= NLETTERS;
XXXXXX[4] = letters[v % NLETTERS];
v /= NLETTERS;
XXXXXX[5] = letters[v % NLETTERS];
fd = open (tmpl, O_RDWR | O_CREAT | O_EXCL | O_BINARY, 0600);
@@ -581,3 +582,94 @@ g_mkstemp (char *tmpl)
return -1;
#endif
}
/**
* g_file_open_tmp:
* @template: Template for file name, as in g_mkstemp, basename only
* @name_used: location to store actual name used
* @error: return location for a #GError
*
* Opens a file for writing in the preferred directory for temporary
* files (as returned by g_get_tmp_dir()).
*
* @template should be a string ending with six 'X' characters, as the
* parameter to g_mkstemp() (or mktemp()). However, unlike these
* functions, the template should only be a basename, no directory
* components are allowed. If template is NULL, a default template is
* used.
*
* The actual name used is returned in @name_used if non-NULL. This
* string should be freed with g_free when not needed any longer.
*
* If some error occurs, @error is set, and -1 is returned. Otherwise,
* the file descriptor to a file opened for reading and writing with
* g_mkstemp() is returned.
**/
int
g_file_open_tmp (const char *template,
char **name_used,
GError **error)
{
int retval;
char mytemplate[10];
char *tmpdir;
char *sep;
char *fulltemplate;
if (template == NULL)
{
strcpy (mytemplate, ".XXXXXX");
template = mytemplate;
}
if (strchr (template, G_DIR_SEPARATOR))
{
g_set_error (error,
G_FILE_ERROR,
G_FILE_ERROR_FAILED,
_("Template '%s' illegal, should not contain a '%s'"),
template, G_DIR_SEPARATOR_S);
return -1;
}
if (strlen (template) < 6 ||
strcmp (template + strlen (template) - 6, "XXXXXX") != 0)
{
g_set_error (error,
G_FILE_ERROR,
G_FILE_ERROR_FAILED,
_("Template '%s' doesn end with XXXXXX"),
template);
return -1;
}
tmpdir = g_get_tmp_dir ();
if (tmpdir [strlen (tmpdir) - 1] == G_DIR_SEPARATOR)
sep = "";
else
sep = G_DIR_SEPARATOR_S;
fulltemplate = g_strconcat (tmpdir, sep, template, NULL);
retval = g_mkstemp (fulltemplate);
if (retval == -1)
{
g_set_error (error,
G_FILE_ERROR,
g_file_error_from_errno (errno),
_("Failed to create file '%s': %s"),
fulltemplate, strerror (errno));
g_free (fulltemplate);
return -1;
}
if (name_used)
*name_used = fulltemplate;
else
g_free (fulltemplate);
return retval;
}