really create glitch-free branch

git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/glitch-free@2120 fefdeb5f-60dc-0310-8127-8f9354f1896f

1 files changed, 262 insertions, 0 deletions

diff --git a/src/pulse/util.c b/src/pulse/util.c
new file mode 100644
index 00000000..d3ac9f66
--- /dev/null
+++ b/src/pulse/util.c
@@ -0,0 +1,262 @@
+/* $Id$ */
+
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2006 Lennart Poettering
+  Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
+
+  PulseAudio 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.
+
+  PulseAudio 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 PulseAudio; 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 <errno.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/types.h>
+
+#ifdef HAVE_PWD_H
+#include <pwd.h>
+#endif
+
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+
+#ifdef HAVE_NETDB_H
+#include <netdb.h>
+#endif
+
+#ifdef HAVE_WINDOWS_H
+#include <windows.h>
+#endif
+
+#ifdef HAVE_SYS_PRCTL_H
+#include <sys/prctl.h>
+#endif
+
+#include <pulse/xmalloc.h>
+#include <pulsecore/winsock.h>
+#include <pulsecore/core-error.h>
+#include <pulsecore/log.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/macro.h>
+
+#include "util.h"
+
+char *pa_get_user_name(char *s, size_t l) {
+    char *p;
+    char buf[1024];
+
+#ifdef HAVE_PWD_H
+    struct passwd pw, *r;
+#endif
+
+    pa_assert(s);
+    pa_assert(l > 0);
+
+    if (!(p = getenv("USER")) && !(p = getenv("LOGNAME")) && !(p = getenv("USERNAME"))) {
+#ifdef HAVE_PWD_H
+
+#ifdef HAVE_GETPWUID_R
+        if (getpwuid_r(getuid(), &pw, buf, sizeof(buf), &r) != 0 || !r) {
+#else
+        /* XXX Not thread-safe, but needed on OSes (e.g. FreeBSD 4.X)
+            * that do not support getpwuid_r. */
+        if ((r = getpwuid(getuid())) == NULL) {
+#endif
+            pa_snprintf(s, l, "%lu", (unsigned long) getuid());
+            return s;
+        }
+
+        p = r->pw_name;
+
+#elif defined(OS_IS_WIN32) /* HAVE_PWD_H */
+        DWORD size = sizeof(buf);
+
+        if (!GetUserName(buf, &size))
+            return NULL;
+
+        p = buf;
+
+#else /* HAVE_PWD_H */
+        return NULL;
+#endif /* HAVE_PWD_H */
+    }
+
+    return pa_strlcpy(s, p, l);
+}
+
+char *pa_get_host_name(char *s, size_t l) {
+
+    pa_assert(s);
+    pa_assert(l > 0);
+
+    if (gethostname(s, l) < 0) {
+        pa_log("gethostname(): %s", pa_cstrerror(errno));
+        return NULL;
+    }
+
+    s[l-1] = 0;
+    return s;
+}
+
+char *pa_get_home_dir(char *s, size_t l) {
+    char *e;
+
+#ifdef HAVE_PWD_H
+    char buf[1024];
+    struct passwd pw, *r;
+#endif
+
+    pa_assert(s);
+    pa_assert(l > 0);
+
+    if ((e = getenv("HOME")))
+        return pa_strlcpy(s, e, l);
+
+    if ((e = getenv("USERPROFILE")))
+        return pa_strlcpy(s, e, l);
+
+#ifdef HAVE_PWD_H
+#ifdef HAVE_GETPWUID_R
+    if (getpwuid_r(getuid(), &pw, buf, sizeof(buf), &r) != 0 || !r) {
+        pa_log("getpwuid_r() failed");
+#else
+    /* XXX Not thread-safe, but needed on OSes (e.g. FreeBSD 4.X)
+        * that do not support getpwuid_r. */
+    if ((r = getpwuid(getuid())) == NULL) {
+        pa_log("getpwuid_r() failed");
+#endif
+        return NULL;
+    }
+
+    return pa_strlcpy(s, r->pw_dir, l);
+#else /* HAVE_PWD_H */
+    return NULL;
+#endif
+}
+
+char *pa_get_binary_name(char *s, size_t l) {
+
+    pa_assert(s);
+    pa_assert(l > 0);
+
+#if defined(OS_IS_WIN32)
+    {
+        char path[PATH_MAX];
+
+        if (GetModuleFileName(NULL, path, PATH_MAX))
+            return pa_strlcpy(s, pa_path_get_filename(path), l);
+    }
+#endif
+
+#ifdef __linux__
+    {
+        char *rp;
+        /* This works on Linux only */
+
+        if ((rp = pa_readlink("/proc/self/exe"))) {
+            pa_strlcpy(s, pa_path_get_filename(rp), l);
+            pa_xfree(rp);
+            return s;
+        }
+    }
+
+#endif
+
+#if defined(HAVE_SYS_PRCTL_H) && defined(PR_GET_NAME)
+    {
+
+        #ifndef TASK_COMM_LEN
+        /* Actually defined in linux/sched.h */
+        #define TASK_COMM_LEN 16
+        #endif
+
+        char tcomm[TASK_COMM_LEN+1];
+        memset(tcomm, 0, sizeof(tcomm));
+
+        /* This works on Linux only */
+        if (prctl(PR_GET_NAME, (unsigned long) tcomm, 0, 0, 0) == 0)
+            return pa_strlcpy(s, tcomm, l);
+
+    }
+#endif
+
+    return NULL;
+}
+
+char *pa_path_get_filename(const char *p) {
+    char *fn;
+
+    pa_assert(p);
+
+    if ((fn = strrchr(p, PA_PATH_SEP_CHAR)))
+        return fn+1;
+
+    return (char*) p;
+}
+
+char *pa_get_fqdn(char *s, size_t l) {
+    char hn[256];
+#ifdef HAVE_GETADDRINFO
+    struct addrinfo *a, hints;
+#endif
+
+    pa_assert(s);
+    pa_assert(l > 0);
+
+    if (!pa_get_host_name(hn, sizeof(hn)))
+        return NULL;
+
+#ifdef HAVE_GETADDRINFO
+    memset(&hints, 0, sizeof(hints));
+    hints.ai_family = AF_UNSPEC;
+    hints.ai_flags = AI_CANONNAME;
+
+    if (getaddrinfo(hn, NULL, &hints, &a) < 0 || !a || !a->ai_canonname || !*a->ai_canonname)
+        return pa_strlcpy(s, hn, l);
+
+    pa_strlcpy(s, a->ai_canonname, l);
+    freeaddrinfo(a);
+    return s;
+#else
+    return pa_strlcpy(s, hn, l);
+#endif
+}
+
+int pa_msleep(unsigned long t) {
+#ifdef OS_IS_WIN32
+    Sleep(t);
+    return 0;
+#elif defined(HAVE_NANOSLEEP)
+    struct timespec ts;
+
+    ts.tv_sec = t/1000;
+    ts.tv_nsec = (t % 1000) * 1000000;
+
+    return nanosleep(&ts, NULL);
+#else
+#error "Platform lacks a sleep function."
+#endif
+}