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/* $Id$ */
/***
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 <pwd.h>
#include <signal.h>
#include <pthread.h>
#include <sys/time.h>
#include <sched.h>
#include <sys/resource.h>
#include "util.h"
#include "xmalloc.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 = (uint8_t*) 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 = (uint8_t*) data + r;
size -= r;
}
return ret;
}
void pa_check_for_sigpipe(void) {
struct sigaction sa;
sigset_t set;
#ifdef HAVE_PTHREAD
if (pthread_sigmask(SIG_SETMASK, NULL, &set) < 0) {
#endif
if (sigprocmask(SIG_SETMASK, NULL, &set) < 0) {
fprintf(stderr, __FILE__": sigprocmask() failed: %s\n", strerror(errno));
return;
}
#ifdef HAVE_PTHREAD
}
#endif
if (sigismember(&set, SIGPIPE))
return;
if (sigaction(SIGPIPE, NULL, &sa) < 0) {
fprintf(stderr, __FILE__": sigaction() failed: %s\n", strerror(errno));
return;
}
if (sa.sa_handler != SIG_DFL)
return;
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 = pa_xrealloc(c, size);
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;
}
}
char *pa_get_user_name(char *s, size_t l) {
struct passwd pw, *r;
char buf[1024];
char *p;
if (!(p = getenv("USER")))
if (!(p = getenv("LOGNAME")))
if (!(p = getenv("USERNAME"))) {
if (getpwuid_r(getuid(), &pw, buf, sizeof(buf), &r) != 0 || !r) {
snprintf(s, l, "%lu", (unsigned long) getuid());
return s;
}
p = r->pw_name;
}
snprintf(s, l, "%s", p);
return s;
}
char *pa_get_host_name(char *s, size_t l) {
gethostname(s, l);
s[l-1] = 0;
return s;
}
uint32_t pa_age(struct timeval *tv) {
struct timeval now;
uint32_t r;
assert(tv);
if (tv->tv_sec == 0)
return 0;
gettimeofday(&now, NULL);
r = (now.tv_sec-tv->tv_sec) * 1000000;
if (now.tv_usec >= tv->tv_usec)
r += now.tv_usec - tv->tv_usec;
else
r -= tv->tv_usec - now.tv_usec;
return r;
}
#define NICE_LEVEL (-15)
void pa_raise_priority(void) {
if (setpriority(PRIO_PROCESS, 0, NICE_LEVEL) < 0)
fprintf(stderr, __FILE__": setpriority() failed: %s\n", strerror(errno));
else
fprintf(stderr, __FILE__": Successfully gained nice level %i.\n", NICE_LEVEL);
#ifdef _POSIX_PRIORITY_SCHEDULING
{
struct sched_param sp;
sched_getparam(0, &sp);
sp.sched_priority = 1;
if (sched_setscheduler(0, SCHED_FIFO, &sp) < 0)
fprintf(stderr, __FILE__": sched_setscheduler() failed: %s\n", strerror(errno));
else
fprintf(stderr, __FILE__": Successfully gained SCHED_FIFO scheduling.\n");
}
#endif
}
void pa_reset_priority(void) {
#ifdef _POSIX_PRIORITY_SCHEDULING
{
struct sched_param sp;
sched_getparam(0, &sp);
sp.sched_priority = 0;
sched_setscheduler(0, SCHED_OTHER, &sp);
}
#endif
setpriority(PRIO_PROCESS, 0, 0);
}
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