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/* -*-mode: c; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-*/
/*
**
** Copyright (C) 2008-2011 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 3 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software Foundation,
** Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**
*/
#if HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include "mu-util.h"
#define _XOPEN_SOURCE 500
#include <wordexp.h> /* for shell-style globbing */
#include <stdlib.h>
#include <string.h>
#include <locale.h> /* for setlocale() */
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <glib-object.h>
#include <glib/gstdio.h>
#include <errno.h>
#include <langinfo.h>
static char*
do_wordexp (const char *path)
{
wordexp_t wexp;
char *dir;
if (!path) {
/* g_debug ("%s: path is empty", __FUNCTION__); */
return NULL;
}
if (wordexp (path, &wexp, 0) != 0) {
/* g_debug ("%s: expansion failed for %s", __FUNCTION__, path); */
return NULL;
}
/* we just pick the first one */
dir = g_strdup (wexp.we_wordv[0]);
/* strangely, below seems to lead to a crash on MacOS (BSD);
so we have to allow for a tiny leak here on that
platform... maybe instead of __APPLE__ it should be
__BSD__?*/
#ifndef __APPLE__
wordfree (&wexp);
#endif /*__APPLE__*/
return dir;
}
/* note, the g_debugs are commented out because this function may be
* called before the log handler is installed. */
char*
mu_util_dir_expand (const char *path)
{
char *dir;
char resolved[PATH_MAX + 1];
g_return_val_if_fail (path, NULL);
dir = do_wordexp (path);
if (!dir)
return NULL; /* error */
/* don't try realpath if the dir does not exist */
if (access (dir, F_OK) != 0)
return dir;
/* now resolve any symlinks, .. etc. */
if (realpath (dir, resolved) == NULL) {
/* g_debug ("%s: could not get realpath for '%s': %s", */
/* __FUNCTION__, dir, strerror(errno)); */
g_free (dir);
return NULL;
} else
g_free (dir);
return g_strdup (resolved);
}
char*
mu_util_create_tmpdir (void)
{
gchar *dirname;
dirname = g_strdup_printf ("%s%cmu-%d%c%x",
g_get_tmp_dir(),
G_DIR_SEPARATOR,
getuid(),
G_DIR_SEPARATOR,
(int)random()*getpid()*(int)time(NULL));
if (!mu_util_create_dir_maybe (dirname, 0700, FALSE)) {
g_free (dirname);
return NULL;
}
return dirname;
}
GQuark
mu_util_error_quark (void)
{
static GQuark error_domain = 0;
if (G_UNLIKELY(error_domain == 0))
error_domain = g_quark_from_static_string
("mu-error-quark");
return error_domain;
}
const char*
mu_util_cache_dir (void)
{
static char cachedir [PATH_MAX];
snprintf (cachedir, sizeof(cachedir), "%s%cmu-%u",
g_get_tmp_dir(), G_DIR_SEPARATOR,
getuid());
return cachedir;
}
gboolean
mu_util_check_dir (const gchar* path, gboolean readable, gboolean writeable)
{
int mode;
struct stat statbuf;
if (!path)
return FALSE;
mode = F_OK | (readable ? R_OK : 0) | (writeable ? W_OK : 0);
if (access (path, mode) != 0) {
/* g_debug ("Cannot access %s: %s", path, strerror (errno)); */
return FALSE;
}
if (stat (path, &statbuf) != 0) {
/* g_debug ("Cannot stat %s: %s", path, strerror (errno)); */
return FALSE;
}
return S_ISDIR(statbuf.st_mode) ? TRUE: FALSE;
}
gchar*
mu_util_guess_maildir (void)
{
const gchar *mdir1, *home;
/* first, try MAILDIR */
mdir1 = g_getenv ("MAILDIR");
if (mdir1 && mu_util_check_dir (mdir1, TRUE, FALSE))
return g_strdup (mdir1);
/* then, try <home>/Maildir */
home = g_get_home_dir();
if (home) {
char *mdir2;
mdir2 = g_strdup_printf ("%s%cMaildir",
home, G_DIR_SEPARATOR);
if (mu_util_check_dir (mdir2, TRUE, FALSE))
return mdir2;
g_free (mdir2);
}
/* nope; nothing found */
return NULL;
}
gchar*
mu_util_guess_mu_homedir (void)
{
const char* home;
/* g_get_home_dir use /etc/passwd, not $HOME; this is better,
* as HOME may be wrong when using 'sudo' etc.*/
home = g_get_home_dir ();
if (!home) {
MU_WRITE_LOG ("failed to determine homedir");
return NULL;
}
return g_strdup_printf ("%s%c%s", home ? home : ".",
G_DIR_SEPARATOR, ".mu");
}
gboolean
mu_util_create_dir_maybe (const gchar *path, mode_t mode, gboolean nowarn)
{
struct stat statbuf;
g_return_val_if_fail (path, FALSE);
/* if it exists, it must be a readable dir */
if (stat (path, &statbuf) == 0) {
if ((!S_ISDIR(statbuf.st_mode)) ||
(access (path, W_OK|R_OK) != 0)) {
if (!nowarn)
g_warning ("not a read-writable"
"directory: %s", path);
return FALSE;
}
}
if (g_mkdir_with_parents (path, mode) != 0) {
if (!nowarn)
g_warning ("failed to create %s: %s",
path, strerror(errno));
return FALSE;
}
return TRUE;
}
gchar*
mu_util_str_from_strv (const gchar **params)
{
GString *str;
int i;
g_return_val_if_fail (params, NULL);
if (!params[0])
return g_strdup ("");
str = g_string_sized_new (64); /* just a guess */
for (i = 0; params[i]; ++i) {
if (i > 0)
g_string_append_c (str, ' ');
g_string_append (str, params[i]);
}
return g_string_free (str, FALSE);
}
int
mu_util_create_writeable_fd (const char* path, mode_t mode,
gboolean overwrite)
{
errno = 0; /* clear! */
g_return_val_if_fail (path, -1);
if (overwrite)
return open (path, O_WRONLY|O_CREAT|O_TRUNC, mode);
else
return open (path, O_WRONLY|O_CREAT|O_EXCL, mode);
}
gboolean
mu_util_is_local_file (const char* path)
{
/* if it starts with file:// it's a local file (for the
* purposes of this function -- if it's on a remote FS it's
* still considered local) */
if (g_ascii_strncasecmp ("file://", path, strlen("file://")) == 0)
return TRUE;
if (access (path, R_OK) == 0)
return TRUE;
return FALSE;
}
gboolean
mu_util_play (const char *path, gboolean allow_local, gboolean allow_remote,
GError **err)
{
gboolean rv;
const gchar *argv[3];
const char *prog;
g_return_val_if_fail (path, FALSE);
g_return_val_if_fail (mu_util_is_local_file (path) || allow_remote,
FALSE);
g_return_val_if_fail (!mu_util_is_local_file (path) || allow_local,
FALSE);
prog = g_getenv ("MU_PLAY_PROGRAM");
if (!prog) {
#ifdef __APPLE__
prog = "open";
#else
prog = "xdg-open";
#endif /*!__APPLE__*/
}
argv[0] = prog;
argv[1] = path;
argv[2] = NULL;
err = NULL;
rv = g_spawn_async (NULL,
(gchar**)&argv,
NULL,
G_SPAWN_SEARCH_PATH,
NULL, NULL, NULL,
err);
return rv;
}
unsigned char
mu_util_get_dtype_with_lstat (const char *path)
{
struct stat statbuf;
g_return_val_if_fail (path, DT_UNKNOWN);
if (lstat (path, &statbuf) != 0) {
g_warning ("stat failed on %s: %s", path, strerror(errno));
return DT_UNKNOWN;
}
/* we only care about dirs, regular files and links */
if (S_ISREG (statbuf.st_mode))
return DT_REG;
else if (S_ISDIR (statbuf.st_mode))
return DT_DIR;
else if (S_ISLNK (statbuf.st_mode))
return DT_LNK;
return DT_UNKNOWN;
}
gboolean
mu_util_locale_is_utf8 (void)
{
const gchar *dummy;
static int is_utf8 = -1;
if (G_UNLIKELY(is_utf8 == -1))
is_utf8 = g_get_charset(&dummy) ? 1 : 0;
return is_utf8 ? TRUE : FALSE;
}
gboolean
mu_util_fputs_encoded (const char *str, FILE *stream)
{
char *conv;
int rv;
g_return_val_if_fail (str, FALSE);
g_return_val_if_fail (stream, FALSE);
/* g_get_charset return TRUE when the locale is UTF8 */
if (mu_util_locale_is_utf8())
rv = fputs (str, stream);
else { /* charset is _not_ utf8, so we actually have to
* convert it..*/
GError *err;
unsigned bytes;
err = NULL;
conv = g_locale_from_utf8 (str, -1, (gsize*)&bytes, NULL, &err);
if (!conv || err) {
/* conversion failed; this happens because is
* some cases GMime may gives us non-UTF-8
* string from e.g. wrongly encoded
* message-subjects; if so, we escape the
* string */
g_warning ("%s: g_locale_from_utf8 failed: %s",
__FUNCTION__,
err ? err->message : "conversion failed");
g_clear_error (&err);
g_free (conv);
conv = g_strescape (str, NULL);
}
rv = fputs (conv, stream);
g_free (conv);
}
return (rv == EOF) ? FALSE : TRUE;
}
gboolean
mu_util_g_set_error (GError **err, MuError errcode, const char *frm, ...)
{
va_list ap;
char *msg;
/* don't bother with NULL errors, or errors already set */
if (!err || *err)
return FALSE;
msg = NULL;
va_start (ap, frm);
g_vasprintf (&msg, frm, ap);
va_end (ap);
g_set_error (err, MU_ERROR_DOMAIN, errcode, "%s", msg);
g_free (msg);
return FALSE;
}
static gboolean
print_args (FILE *stream, const char *frm, va_list args)
{
gchar *str;
gboolean rv;
str = g_strdup_vprintf (frm, args);
rv = mu_util_fputs_encoded (str, stream);
g_free (str);
return rv;
}
gboolean
mu_util_print_encoded (const char *frm, ...)
{
va_list args;
gboolean rv;
g_return_val_if_fail (frm, FALSE);
va_start (args, frm);
rv = print_args (stdout, frm, args);
va_end (args);
return rv;
}
gboolean
mu_util_printerr_encoded (const char *frm, ...)
{
va_list args;
gboolean rv;
g_return_val_if_fail (frm, FALSE);
va_start (args, frm);
rv = print_args (stderr, frm, args);
va_end (args);
return rv;
}
char*
mu_util_read_password (const char *prompt)
{
char *pass;
g_return_val_if_fail (prompt, NULL);
/* note: getpass is obsolete; replace with something better */
pass = getpass (prompt); /* returns static mem, don't free */
if (!pass) {
if (errno)
g_warning ("error: %s", strerror(errno));
return NULL;
}
return g_strdup (pass);
}
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