1 files changed, 147 insertions, 0 deletions
diff --git a/polyp/util.c b/polyp/util.c
new file mode 100644
index 00000000..6e75c240
--- /dev/null
+++ b/polyp/util.c
@@ -0,0 +1,147 @@
+/* $Id$ */
+
+/***
+  This file is part of polypaudio.
+ 
+  polypaudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published
+  by the Free Software Foundation; either version 2 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
+  General Public License for more details.
+ 
+  You should have received a copy of the GNU 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 <stdarg.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <errno.h>
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/types.h>
+
+#include "util.h"
+
+void pa_make_nonblock_fd(int fd) {
+    int v;
+
+    if ((v = fcntl(fd, F_GETFL)) >= 0)
+        if (!(v & O_NONBLOCK))
+            fcntl(fd, F_SETFL, v|O_NONBLOCK);
+}
+
+int pa_make_secure_dir(const char* dir) {
+    struct stat st;
+
+    if (mkdir(dir, 0700) < 0) 
+        if (errno != EEXIST)
+            return -1;
+    
+    if (lstat(dir, &st) < 0) 
+        goto fail;
+    
+    if (!S_ISDIR(st.st_mode) || (st.st_uid != getuid()) || ((st.st_mode & 0777) != 0700))
+        goto fail;
+    
+    return 0;
+    
+fail:
+    rmdir(dir);
+    return -1;
+}
+
+ssize_t pa_loop_read(int fd, void*data, size_t size) {
+    ssize_t ret = 0;
+    assert(fd >= 0 && data && size);
+
+    while (size > 0) {
+        ssize_t r;
+
+        if ((r = read(fd, data, size)) < 0)
+            return r;
+
+        if (r == 0)
+            break;
+        
+        ret += r;
+        data += r;
+        size -= r;
+    }
+
+    return ret;
+}
+
+ssize_t pa_loop_write(int fd, const void*data, size_t size) {
+    ssize_t ret = 0;
+    assert(fd >= 0 && data && size);
+
+    while (size > 0) {
+        ssize_t r;
+
+        if ((r = write(fd, data, size)) < 0)
+            return r;
+
+        if (r == 0)
+            break;
+        
+        ret += r;
+        data += r;
+        size -= r;
+    }
+
+    return ret;
+}
+
+void pa_check_for_sigpipe(void) {
+    struct sigaction sa;
+
+    if (sigaction(SIGPIPE, NULL, &sa) < 0) {
+        fprintf(stderr, __FILE__": sigaction() failed: %s\n", strerror(errno));
+        return;
+    }
+        
+    if (sa.sa_handler == SIG_DFL)
+        fprintf(stderr, "polypaudio: WARNING: SIGPIPE is not trapped. This might cause malfunction!\n");
+}
+
+/* The following is based on an example from the GNU libc documentation */
+char *pa_sprintf_malloc(const char *format, ...) {
+    int  size = 100;
+    char *c = NULL;
+    
+    assert(format);
+    
+    for(;;) {
+        int r;
+        va_list ap;
+
+        c = realloc(c, size);
+        assert(c);
+
+        va_start(ap, format);
+        r = vsnprintf(c, size, format, ap);
+        va_end(ap);
+        
+        if (r > -1 && r < size)
+            return c;
+
+        if (r > -1)    /* glibc 2.1 */
+            size = r+1; 
+        else           /* glibc 2.0 */
+            size *= 2;
+    }
+}