Reorganised the source tree. We now have src/ with a couple of subdirs:

* daemon/ - Contains the files specific to the polypaudio daemon.
 * modules/ - All loadable modules.
 * polyp/ - Files that are part of the public, application interface or
   are only used in libpolyp.
 * polypcore/ - All other shared files.
 * tests/ - Test programs.
 * utils/ - Utility programs.


git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@487 fefdeb5f-60dc-0310-8127-8f9354f1896f

src/polypcore/authkey.c

@@ -0,0 +1,201 @@
+/* $Id$ */
+
+/***
+  This file is part of polypaudio.
+ 
+  polypaudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as
+  published by the Free Software Foundation; either version 2.1 of the
+  License, or (at your option) any later version.
+ 
+  polypaudio 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
+  Lesser General Public License for more details.
+ 
+  You should have received a copy of the GNU Lesser General Public
+  License along with polypaudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <assert.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <errno.h>
+#include <stdio.h>
+#include <inttypes.h>
+#include <stdlib.h>
+#include <time.h>
+#include <limits.h>
+#include <sys/stat.h>
+
+#include "authkey.h"
+#include "util.h"
+#include "log.h"
+#include "random.h"
+
+/* Generate a new authorization key, store it in file fd and return it in *data  */
+static int generate(int fd, void *ret_data, size_t length) {
+    ssize_t r;
+    assert(fd >= 0 && ret_data && length);
+
+    pa_random(ret_data, length);
+
+    lseek(fd, 0, SEEK_SET);
+    ftruncate(fd, 0);
+
+    if ((r = pa_loop_write(fd, ret_data, length)) < 0 || (size_t) r != length) {
+        pa_log(__FILE__": failed to write cookie file: %s\n", strerror(errno));
+        return -1;
+    }
+
+    return 0;
+}
+
+/* Load an euthorization cookie from file fn and store it in data. If
+ * the cookie file doesn't exist, create it */
+static int load(const char *fn, void *data, size_t length) {
+    int fd = -1;
+    int writable = 1;
+    int unlock = 0, ret = -1;
+    ssize_t r;
+    assert(fn && data && length);
+
+    if ((fd = open(fn, O_RDWR|O_CREAT, S_IRUSR|S_IWUSR)) < 0) {
+        if (errno != EACCES || (fd = open(fn, O_RDONLY)) < 0) {
+            pa_log(__FILE__": failed to open cookie file '%s': %s\n", fn, strerror(errno));
+            goto finish;
+        } else
+            writable = 0;
+    }
+
+    unlock = pa_lock_fd(fd, 1) >= 0;
+
+    if ((r = pa_loop_read(fd, data, length)) < 0) {
+        pa_log(__FILE__": failed to read cookie file '%s': %s\n", fn, strerror(errno));
+        goto finish;
+    }
+
+    if ((size_t) r != length) {
+        
+        if (!writable) {
+            pa_log(__FILE__": unable to write cookie to read only file\n");
+            goto finish;
+        }
+        
+        if (generate(fd, data, length) < 0)
+            goto finish;
+    }
+
+    ret = 0;
+    
+finish:
+
+    if (fd >= 0) {
+        
+        if (unlock)
+            pa_lock_fd(fd, 0);
+        
+        close(fd);
+    }
+
+    return ret;
+}
+
+/* Load a cookie from a cookie file. If the file doesn't exist, create it. */
+int pa_authkey_load(const char *path, void *data, size_t length) {
+    int ret;
+
+    assert(path && data && length);
+
+    ret = load(path, data, length);
+
+    if (ret < 0)
+        pa_log(__FILE__": Failed to load authorization key '%s': %s\n", path,
+               (ret == -1) ? strerror(errno) : "file corrupt");
+
+    return ret;
+}
+
+/* If the specified file path starts with / return it, otherwise
+ * return path prepended with home directory */
+static const char *normalize_path(const char *fn, char *s, size_t l) {
+    assert(fn && s && l > 0);
+
+#ifndef OS_IS_WIN32
+    if (fn[0] != '/') {
+#else
+    if (strlen(fn) < 3 || !isalpha(fn[0]) || fn[1] != ':' || fn[2] != '\\') {
+#endif
+        char homedir[PATH_MAX];
+        if (!pa_get_home_dir(homedir, sizeof(homedir)))
+            return NULL;
+        
+#ifndef OS_IS_WIN32
+        snprintf(s, l, "%s/%s", homedir, fn);
+#else
+        snprintf(s, l, "%s\\%s", homedir, fn);
+#endif
+        return s;
+    }
+
+    return fn;
+}
+
+/* Load a cookie from a file in the home directory. If the specified
+ * path starts with /, use it as absolute path instead. */
+int pa_authkey_load_auto(const char *fn, void *data, size_t length) {
+    char path[PATH_MAX];
+    const char *p;
+    assert(fn && data && length);
+
+    if (!(p = normalize_path(fn, path, sizeof(path))))
+        return -2;
+        
+    return pa_authkey_load(p, data, length);
+}
+
+/* Store the specified cookie in the speicified cookie file */
+int pa_authkey_save(const char *fn, const void *data, size_t length) {
+    int fd = -1;
+    int unlock = 0, ret = -1;
+    ssize_t r;
+    char path[PATH_MAX];
+    const char *p;
+    assert(fn && data && length);
+
+    if (!(p = normalize_path(fn, path, sizeof(path))))
+        return -2;
+
+    if ((fd = open(p, O_RDWR|O_CREAT, S_IRUSR|S_IWUSR)) < 0) {
+        pa_log(__FILE__": failed to open cookie file '%s': %s\n", fn, strerror(errno));
+        goto finish;
+    }
+
+    unlock = pa_lock_fd(fd, 1) >= 0;
+
+    if ((r = pa_loop_write(fd, data, length)) < 0 || (size_t) r != length) {
+        pa_log(__FILE__": failed to read cookie file '%s': %s\n", fn, strerror(errno));
+        goto finish;
+    }
+
+    ret = 0;
+    
+finish:
+
+    if (fd >= 0) {
+        
+        if (unlock)
+            pa_lock_fd(fd, 0);
+        
+        close(fd);
+    }
+
+    return ret;
+}