#include <sys/stat.h>
#include <sys/time.h>
#include <dirent.h>
+#include <regex.h>
+#include <langinfo.h>
+#include <sys/utsname.h>
+#include <sys/socket.h>
#ifdef HAVE_STRTOF_L
#include <locale.h>
#ifdef HAVE_SCHED_H
#include <sched.h>
+
+#if defined(__linux__) && !defined(SCHED_RESET_ON_FORK)
+#define SCHED_RESET_ON_FORK 0x40000000
+#endif
#endif
#ifdef HAVE_SYS_RESOURCE_H
#include <samplerate.h>
#endif
+#ifdef __APPLE__
+#include <xlocale.h>
+#endif
+
+#ifdef HAVE_DBUS
+#include "rtkit.h"
+#endif
+
+#ifdef __linux__
+#include <sys/personality.h>
+#endif
+
#include <pulse/xmalloc.h>
#include <pulse/util.h>
#include <pulse/utf8.h>
#include <pulsecore/log.h>
#include <pulsecore/macro.h>
#include <pulsecore/thread.h>
+#include <pulsecore/strbuf.h>
+#include <pulsecore/usergroup.h>
+#include <pulsecore/strlist.h>
+#include <pulsecore/cpu-x86.h>
#include "core-util.h"
#define MSG_NOSIGNAL 0
#endif
+#define NEWLINE "\r\n"
+#define WHITESPACE "\n\r \t"
+
+static pa_strlist *recorded_env = NULL;
+
#ifdef OS_IS_WIN32
#define PULSE_ROOTENV "PULSE_ROOT"
strcpy(library_path, PULSE_ROOTENV "=");
+ /* FIXME: Needs to set errno */
+
if (!GetModuleFileName(handle, library_path + sizeof(PULSE_ROOTENV), MAX_PATH))
return 0;
/** Creates a directory securely */
int pa_make_secure_dir(const char* dir, mode_t m, uid_t uid, gid_t gid) {
struct stat st;
- int r;
+ int r, saved_errno, fd;
pa_assert(dir);
if (r < 0 && errno != EEXIST)
return -1;
-#ifdef HAVE_CHOWN
+#ifdef HAVE_FSTAT
+ if ((fd = open(dir,
+#ifdef O_CLOEXEC
+ O_CLOEXEC|
+#endif
+#ifdef O_NOCTTY
+ O_NOCTTY|
+#endif
+#ifdef O_NOFOLLOW
+ O_NOFOLLOW|
+#endif
+ O_RDONLY)) < 0)
+ goto fail;
+
+ if (fstat(fd, &st) < 0) {
+ pa_assert_se(pa_close(fd) >= 0);
+ goto fail;
+ }
+
+ if (!S_ISDIR(st.st_mode)) {
+ pa_assert_se(pa_close(fd) >= 0);
+ errno = EEXIST;
+ goto fail;
+ }
+
+#ifdef HAVE_FCHOWN
if (uid == (uid_t)-1)
uid = getuid();
if (gid == (gid_t)-1)
gid = getgid();
- (void) chown(dir, uid, gid);
+ (void) fchown(fd, uid, gid);
+#endif
+
+#ifdef HAVE_FCHMOD
+ (void) fchmod(fd, m);
#endif
-#ifdef HAVE_CHMOD
- chmod(dir, m);
+ pa_assert_se(pa_close(fd) >= 0);
+
#endif
#ifdef HAVE_LSTAT
return 0;
fail:
+ saved_errno = errno;
rmdir(dir);
+ errno = saved_errno;
+
return -1;
}
if ((slash = (char*) pa_path_get_filename(dir)) == dir) {
pa_xfree(dir);
+ errno = ENOENT;
return NULL;
}
#endif
- return read(fd, buf, count);
+ for (;;) {
+ ssize_t r;
+
+ if ((r = read(fd, buf, count)) < 0)
+ if (errno == EINTR)
+ continue;
+
+ return r;
+ }
}
/** Similar to pa_read(), but handles writes */
if (!type || *type == 0) {
ssize_t r;
- if ((r = send(fd, buf, count, MSG_NOSIGNAL)) >= 0)
+ for (;;) {
+ if ((r = send(fd, buf, count, MSG_NOSIGNAL)) < 0) {
+
+ if (errno == EINTR)
+ continue;
+
+ break;
+ }
+
return r;
+ }
#ifdef OS_IS_WIN32
if (WSAGetLastError() != WSAENOTSOCK) {
*type = 1;
}
- return write(fd, buf, count);
+ for (;;) {
+ ssize_t r;
+
+ if ((r = write(fd, buf, count)) < 0)
+ if (errno == EINTR)
+ continue;
+
+ return r;
+ }
}
/** Calls read() in a loop. Makes sure that as much as 'size' bytes,
- * unless EOF is reached or an error occured */
+ * unless EOF is reached or an error occurred */
ssize_t pa_loop_read(int fd, void*data, size_t size, int *type) {
ssize_t ret = 0;
int _type;
ret += r;
data = (uint8_t*) data + r;
- size -= r;
+ size -= (size_t) r;
}
return ret;
ret += r;
data = (const uint8_t*) data + r;
- size -= r;
+ size -= (size_t) r;
}
return ret;
}
#endif
- return close(fd);
+ for (;;) {
+ int r;
+
+ if ((r = close(fd)) < 0)
+ if (errno == EINTR)
+ continue;
+
+ return r;
+ }
}
/* Print a warning messages in case that the given signal is not
/* The following function is based on an example from the GNU libc
* documentation. This function is similar to GNU's asprintf(). */
char *pa_sprintf_malloc(const char *format, ...) {
- int size = 100;
+ size_t size = 100;
char *c = NULL;
pa_assert(format);
c[size-1] = 0;
- if (r > -1 && r < size)
+ if (r > -1 && (size_t) r < size)
return c;
if (r > -1) /* glibc 2.1 */
- size = r+1;
+ size = (size_t) r+1;
else /* glibc 2.0 */
size *= 2;
}
/* Same as the previous function, but use a va_list instead of an
* ellipsis */
char *pa_vsprintf_malloc(const char *format, va_list ap) {
- int size = 100;
+ size_t size = 100;
char *c = NULL;
pa_assert(format);
c[size-1] = 0;
- if (r > -1 && r < size)
+ if (r > -1 && (size_t) r < size)
return c;
if (r > -1) /* glibc 2.1 */
- size = r+1;
+ size = (size_t) r+1;
else /* glibc 2.0 */
size *= 2;
}
/* Similar to OpenBSD's strlcpy() function */
char *pa_strlcpy(char *b, const char *s, size_t l) {
+ size_t k;
+
pa_assert(b);
pa_assert(s);
pa_assert(l > 0);
- strncpy(b, s, l);
- b[l-1] = 0;
+ k = strlen(s);
+
+ if (k > l-1)
+ k = l-1;
+
+ memcpy(b, s, k);
+ b[k] = 0;
+
return b;
}
-/* Make the current thread a realtime thread, and acquire the highest
- * rtprio we can get that is less or equal the specified parameter. If
- * the thread is already realtime, don't do anything. */
-int pa_make_realtime(int rtprio) {
-
-#ifdef _POSIX_PRIORITY_SCHEDULING
+static int set_scheduler(int rtprio) {
struct sched_param sp;
- int r, policy;
+#ifdef HAVE_DBUS
+ int r;
+ DBusError error;
+ DBusConnection *bus;
- memset(&sp, 0, sizeof(sp));
- policy = 0;
+ dbus_error_init(&error);
+#endif
- if ((r = pthread_getschedparam(pthread_self(), &policy, &sp)) != 0) {
- pa_log("pthread_getschedgetparam(): %s", pa_cstrerror(r));
- return -1;
+ pa_zero(sp);
+ sp.sched_priority = rtprio;
+
+#ifdef SCHED_RESET_ON_FORK
+ if (pthread_setschedparam(pthread_self(), SCHED_RR|SCHED_RESET_ON_FORK, &sp) == 0) {
+ pa_log_debug("SCHED_RR|SCHED_RESET_ON_FORK worked.");
+ return 0;
}
+#endif
- if (policy == SCHED_FIFO && sp.sched_priority >= rtprio) {
- pa_log_info("Thread already being scheduled with SCHED_FIFO with priority %i.", sp.sched_priority);
+ if (pthread_setschedparam(pthread_self(), SCHED_RR, &sp) == 0) {
+ pa_log_debug("SCHED_RR worked.");
return 0;
}
- sp.sched_priority = rtprio;
- if ((r = pthread_setschedparam(pthread_self(), SCHED_FIFO, &sp)) != 0) {
+#ifdef HAVE_DBUS
+ /* Try to talk to RealtimeKit */
- while (sp.sched_priority > 1) {
- sp.sched_priority --;
+ if (!(bus = dbus_bus_get(DBUS_BUS_SYSTEM, &error))) {
+ pa_log("Failed to connect to system bus: %s\n", error.message);
+ dbus_error_free(&error);
+ errno = -EIO;
+ return -1;
+ }
- if ((r = pthread_setschedparam(pthread_self(), SCHED_FIFO, &sp)) == 0) {
- pa_log_info("Successfully enabled SCHED_FIFO scheduling for thread, with priority %i, which is lower than the requested %i.", sp.sched_priority, rtprio);
- return 0;
- }
- }
+ /* We need to disable exit on disconnect because otherwise
+ * dbus_shutdown will kill us. See
+ * https://bugs.freedesktop.org/show_bug.cgi?id=16924 */
+ dbus_connection_set_exit_on_disconnect(bus, FALSE);
- pa_log_warn("pthread_setschedparam(): %s", pa_cstrerror(r));
- return -1;
+ r = rtkit_make_realtime(bus, 0, rtprio);
+ dbus_connection_unref(bus);
+
+ if (r >= 0) {
+ pa_log_debug("RealtimeKit worked.");
+ return 0;
}
- pa_log_info("Successfully enabled SCHED_FIFO scheduling for thread, with priority %i.", sp.sched_priority);
- return 0;
+ errno = -r;
#else
- return -1;
+ errno = 0;
#endif
-}
-/* This is merely used for giving the user a hint. This is not correct
- * for anything security related */
-pa_bool_t pa_can_realtime(void) {
+ return -1;
+}
- if (geteuid() == 0)
- return TRUE;
+/* Make the current thread a realtime thread, and acquire the highest
+ * rtprio we can get that is less or equal the specified parameter. If
+ * the thread is already realtime, don't do anything. */
+int pa_make_realtime(int rtprio) {
-#if defined(HAVE_SYS_RESOURCE_H) && defined(RLIMIT_RTPRIO)
- {
- struct rlimit rl;
+#ifdef _POSIX_PRIORITY_SCHEDULING
+ int p;
- if (getrlimit(RLIMIT_RTPRIO, &rl) >= 0)
- if (rl.rlim_cur > 0 || rl.rlim_cur == RLIM_INFINITY)
- return TRUE;
+ if (set_scheduler(rtprio) >= 0) {
+ pa_log_info("Successfully enabled SCHED_RR scheduling for thread, with priority %i.", rtprio);
+ return 0;
}
-#endif
-#if defined(HAVE_SYS_CAPABILITY_H) && defined(CAP_SYS_NICE)
- {
- cap_t cap;
-
- if ((cap = cap_get_proc())) {
- cap_flag_value_t flag = CAP_CLEAR;
+ for (p = rtprio-1; p >= 1; p--)
+ if (set_scheduler(p) >= 0) {
+ pa_log_info("Successfully enabled SCHED_RR scheduling for thread, with priority %i, which is lower than the requested %i.", p, rtprio);
+ return 0;
+ }
- if (cap_get_flag(cap, CAP_SYS_NICE, CAP_EFFECTIVE, &flag) >= 0)
- if (flag == CAP_SET) {
- cap_free(cap);
- return TRUE;
- }
+ pa_log_info("Failed to acquire real-time scheduling: %s", pa_cstrerror(errno));
+ return -1;
+#else
- cap_free(cap);
- }
- }
+ errno = ENOTSUP;
+ return -1;
#endif
-
- return FALSE;
}
-/* This is merely used for giving the user a hint. This is not correct
- * for anything security related */
-pa_bool_t pa_can_high_priority(void) {
-
- if (geteuid() == 0)
- return TRUE;
+static int set_nice(int nice_level) {
+#ifdef HAVE_DBUS
+ DBusError error;
+ DBusConnection *bus;
+ int r;
-#if defined(HAVE_SYS_RESOURCE_H) && defined(RLIMIT_RTPRIO)
- {
- struct rlimit rl;
+ dbus_error_init(&error);
+#endif
- if (getrlimit(RLIMIT_NICE, &rl) >= 0)
- if (rl.rlim_cur >= 21 || rl.rlim_cur == RLIM_INFINITY)
- return TRUE;
+ if (setpriority(PRIO_PROCESS, 0, nice_level) >= 0) {
+ pa_log_debug("setpriority() worked.");
+ return 0;
}
-#endif
-#if defined(HAVE_SYS_CAPABILITY_H) && defined(CAP_SYS_NICE)
- {
- cap_t cap;
+#ifdef HAVE_DBUS
+ /* Try to talk to RealtimeKit */
- if ((cap = cap_get_proc())) {
- cap_flag_value_t flag = CAP_CLEAR;
+ if (!(bus = dbus_bus_get(DBUS_BUS_SYSTEM, &error))) {
+ pa_log("Failed to connect to system bus: %s\n", error.message);
+ dbus_error_free(&error);
+ errno = -EIO;
+ return -1;
+ }
- if (cap_get_flag(cap, CAP_SYS_NICE, CAP_EFFECTIVE, &flag) >= 0)
- if (flag == CAP_SET) {
- cap_free(cap);
- return TRUE;
- }
+ /* We need to disable exit on disconnect because otherwise
+ * dbus_shutdown will kill us. See
+ * https://bugs.freedesktop.org/show_bug.cgi?id=16924 */
+ dbus_connection_set_exit_on_disconnect(bus, FALSE);
- cap_free(cap);
- }
+ r = rtkit_make_high_priority(bus, 0, nice_level);
+ dbus_connection_unref(bus);
+
+ if (r >= 0) {
+ pa_log_debug("RealtimeKit worked.");
+ return 0;
}
+
+ errno = -r;
#endif
- return FALSE;
+ return -1;
}
/* Raise the priority of the current process as much as possible that
int pa_raise_priority(int nice_level) {
#ifdef HAVE_SYS_RESOURCE_H
- if (setpriority(PRIO_PROCESS, 0, nice_level) < 0) {
- int n;
+ int n;
- for (n = nice_level+1; n < 0; n++) {
+ if (set_nice(nice_level) >= 0) {
+ pa_log_info("Successfully gained nice level %i.", nice_level);
+ return 0;
+ }
- if (setpriority(PRIO_PROCESS, 0, n) == 0) {
- pa_log_info("Successfully acquired nice level %i, which is lower than the requested %i.", n, nice_level);
- return 0;
- }
+ for (n = nice_level+1; n < 0; n++)
+ if (set_nice(n) >= 0) {
+ pa_log_info("Successfully acquired nice level %i, which is lower than the requested %i.", n, nice_level);
+ return 0;
}
- pa_log_warn("setpriority(): %s", pa_cstrerror(errno));
- return -1;
- }
-
- pa_log_info("Successfully gained nice level %i.", nice_level);
+ pa_log_info("Failed to acquire high-priority scheduling: %s", pa_cstrerror(errno));
+ return -1;
#endif
#ifdef OS_IS_WIN32
if (nice_level < 0) {
if (!SetPriorityClass(GetCurrentProcess(), HIGH_PRIORITY_CLASS)) {
pa_log_warn("SetPriorityClass() failed: 0x%08X", GetLastError());
- return .-1;
- } else
- pa_log_info("Successfully gained high priority class.");
+ errno = EPERM;
+ return -1;
+ }
+
+ pa_log_info("Successfully gained high priority class.");
}
#endif
setpriority(PRIO_PROCESS, 0, 0);
- memset(&sp, 0, sizeof(sp));
- pa_assert_se(pthread_setschedparam(pthread_self(), SCHED_OTHER, &sp) == 0);
+ pa_zero(sp);
+ pthread_setschedparam(pthread_self(), SCHED_OTHER, &sp);
#endif
#ifdef OS_IS_WIN32
#endif
}
+int pa_match(const char *expr, const char *v) {
+ int k;
+ regex_t re;
+ int r;
+
+ if (regcomp(&re, expr, REG_NOSUB|REG_EXTENDED) != 0) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if ((k = regexec(&re, v, 0, NULL, 0)) == 0)
+ r = 1;
+ else if (k == REG_NOMATCH)
+ r = 0;
+ else
+ r = -1;
+
+ regfree(&re);
+
+ if (r < 0)
+ errno = EINVAL;
+
+ return r;
+}
+
/* Try to parse a boolean string value.*/
int pa_parse_boolean(const char *v) {
+ const char *expr;
pa_assert(v);
+ /* First we check language independant */
if (!strcmp(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || !strcasecmp(v, "on"))
return 1;
else if (!strcmp(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || !strcasecmp(v, "off"))
return 0;
+ /* And then we check language dependant */
+ if ((expr = nl_langinfo(YESEXPR)))
+ if (expr[0])
+ if (pa_match(expr, v) > 0)
+ return 1;
+
+ if ((expr = nl_langinfo(NOEXPR)))
+ if (expr[0])
+ if (pa_match(expr, v) > 0)
+ return 0;
+
+ errno = EINVAL;
return -1;
}
return pa_xstrndup(current, l);
}
-/* What is interpreted as whitespace? */
-#define WHITESPACE " \t\n"
-
/* Split a string into words. Otherwise similar to pa_split(). */
char *pa_split_spaces(const char *c, const char **state) {
const char *current = *state ? *state : c;
/* Check whether the specified GID and the group name match */
static int is_group(gid_t gid, const char *name) {
- struct group group, *result = NULL;
- long n;
- void *data;
+ struct group *group = NULL;
int r = -1;
-#ifdef HAVE_GETGRGID_R
-#ifdef _SC_GETGR_R_SIZE_MAX
- n = sysconf(_SC_GETGR_R_SIZE_MAX);
-#else
- n = -1;
-#endif
- if (n < 0) n = 512;
- data = pa_xmalloc(n);
-
- if (getgrgid_r(gid, &group, data, n, &result) < 0 || !result) {
- pa_log("getgrgid_r(%u): %s", (unsigned)gid, pa_cstrerror(errno));
- goto finish;
- }
+ errno = 0;
+ if (!(group = pa_getgrgid_malloc(gid)))
+ {
+ if (!errno)
+ errno = ENOENT;
- r = strcmp(name, result->gr_name) == 0;
+ pa_log("pa_getgrgid_malloc(%u): %s", gid, pa_cstrerror(errno));
-finish:
- pa_xfree(data);
-#else
- /* XXX Not thread-safe, but needed on OSes (e.g. FreeBSD 4.X) that do not
- * support getgrgid_r. */
- if ((result = getgrgid(gid)) == NULL) {
- pa_log("getgrgid(%u): %s", gid, pa_cstrerror(errno));
goto finish;
}
- r = strcmp(name, result->gr_name) == 0;
+ r = strcmp(name, group->gr_name) == 0;
finish:
-#endif
+ pa_getgrgid_free(group);
return r;
}
/* Check the current user is member of the specified group */
int pa_own_uid_in_group(const char *name, gid_t *gid) {
GETGROUPS_T *gids, tgid;
- int n = sysconf(_SC_NGROUPS_MAX);
- int r = -1, i;
+ long n = sysconf(_SC_NGROUPS_MAX);
+ int r = -1, i, k;
pa_assert(n > 0);
- gids = pa_xmalloc(sizeof(GETGROUPS_T)*n);
+ gids = pa_xmalloc(sizeof(GETGROUPS_T) * (size_t) n);
- if ((n = getgroups(n, gids)) < 0) {
+ if ((n = getgroups((int) n, gids)) < 0) {
pa_log("getgroups(): %s", pa_cstrerror(errno));
goto finish;
}
for (i = 0; i < n; i++) {
- if (is_group(gids[i], name) > 0) {
+
+ if ((k = is_group(gids[i], name)) < 0)
+ goto finish;
+ else if (k > 0) {
*gid = gids[i];
r = 1;
goto finish;
}
}
- if (is_group(tgid = getgid(), name) > 0) {
+ if ((k = is_group(tgid = getgid(), name)) < 0)
+ goto finish;
+ else if (k > 0) {
*gid = tgid;
r = 1;
goto finish;
/* Check whether the specifc user id is a member of the specified group */
int pa_uid_in_group(uid_t uid, const char *name) {
- char *g_buf, *p_buf;
- long g_n, p_n;
- struct group grbuf, *gr;
+ struct group *group = NULL;
char **i;
int r = -1;
- g_n = sysconf(_SC_GETGR_R_SIZE_MAX);
- g_buf = pa_xmalloc(g_n);
-
- p_n = sysconf(_SC_GETPW_R_SIZE_MAX);
- p_buf = pa_xmalloc(p_n);
-
- if (getgrnam_r(name, &grbuf, g_buf, (size_t) g_n, &gr) != 0 || !gr)
+ errno = 0;
+ if (!(group = pa_getgrnam_malloc(name)))
+ {
+ if (!errno)
+ errno = ENOENT;
goto finish;
+ }
r = 0;
- for (i = gr->gr_mem; *i; i++) {
- struct passwd pwbuf, *pw;
+ for (i = group->gr_mem; *i; i++) {
+ struct passwd *pw = NULL;
- if (getpwnam_r(*i, &pwbuf, p_buf, (size_t) p_n, &pw) != 0 || !pw)
+ errno = 0;
+ if (!(pw = pa_getpwnam_malloc(*i)))
continue;
- if (pw->pw_uid == uid) {
+ if (pw->pw_uid == uid)
r = 1;
+
+ pa_getpwnam_free(pw);
+
+ if (r == 1)
break;
- }
}
finish:
- pa_xfree(g_buf);
- pa_xfree(p_buf);
+ pa_getgrnam_free(group);
return r;
}
/* Get the GID of a gfiven group, return (gid_t) -1 on failure. */
gid_t pa_get_gid_of_group(const char *name) {
gid_t ret = (gid_t) -1;
- char *g_buf;
- long g_n;
- struct group grbuf, *gr;
+ struct group *gr = NULL;
- g_n = sysconf(_SC_GETGR_R_SIZE_MAX);
- g_buf = pa_xmalloc(g_n);
-
- if (getgrnam_r(name, &grbuf, g_buf, (size_t) g_n, &gr) != 0 || !gr)
+ errno = 0;
+ if (!(gr = pa_getgrnam_malloc(name)))
+ {
+ if (!errno)
+ errno = ENOENT;
goto finish;
+ }
ret = gr->gr_gid;
finish:
- pa_xfree(g_buf);
+ pa_getgrnam_free(gr);
return ret;
}
#else /* HAVE_GRP_H */
int pa_own_uid_in_group(const char *name, gid_t *gid) {
+ errno = ENOSUP;
return -1;
}
int pa_uid_in_group(uid_t uid, const char *name) {
+ errno = ENOSUP;
return -1;
}
gid_t pa_get_gid_of_group(const char *name) {
+ errno = ENOSUP;
return (gid_t) -1;
}
int pa_check_in_group(gid_t g) {
+ errno = ENOSUP;
return -1;
}
(advisory on UNIX, mandatory on Windows) */
int pa_lock_fd(int fd, int b) {
#ifdef F_SETLKW
- struct flock flock;
+ struct flock f_lock;
/* Try a R/W lock first */
- flock.l_type = b ? F_WRLCK : F_UNLCK;
- flock.l_whence = SEEK_SET;
- flock.l_start = 0;
- flock.l_len = 0;
+ f_lock.l_type = (short) (b ? F_WRLCK : F_UNLCK);
+ f_lock.l_whence = SEEK_SET;
+ f_lock.l_start = 0;
+ f_lock.l_len = 0;
- if (fcntl(fd, F_SETLKW, &flock) >= 0)
+ if (fcntl(fd, F_SETLKW, &f_lock) >= 0)
return 0;
/* Perhaps the file descriptor qas opened for read only, than try again with a read lock. */
if (b && errno == EBADF) {
- flock.l_type = F_RDLCK;
- if (fcntl(fd, F_SETLKW, &flock) >= 0)
+ f_lock.l_type = F_RDLCK;
+ if (fcntl(fd, F_SETLKW, &f_lock) >= 0)
return 0;
}
return 0;
pa_log("%slock failed: 0x%08X", !b ? "un" : "", GetLastError());
+
+ /* FIXME: Needs to set errno! */
#endif
return -1;
char* pa_strip_nl(char *s) {
pa_assert(s);
- s[strcspn(s, "\r\n")] = 0;
+ s[strcspn(s, NEWLINE)] = 0;
+ return s;
+}
+
+char *pa_strip(char *s) {
+ char *e, *l = NULL;
+
+ /* Drops trailing whitespace. Modifies the string in
+ * place. Returns pointer to first non-space character */
+
+ s += strspn(s, WHITESPACE);
+
+ for (e = s; *e; e++)
+ if (!strchr(WHITESPACE, *e))
+ l = e;
+
+ if (l)
+ *(l+1) = 0;
+ else
+ *s = 0;
+
return s;
}
/* Create a temporary lock file and lock it. */
int pa_lock_lockfile(const char *fn) {
- int fd = -1;
+ int fd;
pa_assert(fn);
for (;;) {
struct stat st;
- if ((fd = open(fn, O_CREAT|O_RDWR
-#ifdef O_NOCTTY
- |O_NOCTTY
-#endif
+ if ((fd = pa_open_cloexec(fn, O_CREAT|O_RDWR
#ifdef O_NOFOLLOW
|O_NOFOLLOW
#endif
goto fail;
}
- /* Check wheter the file has been removed meanwhile. When yes,
+ /* Check whether the file has been removed meanwhile. When yes,
* restart this loop, otherwise, we're done */
if (st.st_nlink >= 1)
break;
fd = -1;
goto fail;
}
-
- fd = -1;
}
return fd;
fail:
- if (fd >= 0)
+ if (fd >= 0) {
+ int saved_errno = errno;
pa_close(fd);
+ errno = saved_errno;
+ }
return -1;
}
return r;
}
-static char *get_dir(mode_t m, const char *env_name) {
- const char *e;
- char *d;
+static char *get_pulse_home(void) {
+ char *h;
+ struct stat st;
+ char *ret = NULL;
- if ((e = getenv(env_name)))
- d = pa_xstrdup(e);
- else {
- char h[PATH_MAX];
- struct stat st;
+ if (!(h = pa_get_home_dir_malloc())) {
+ pa_log_error("Failed to get home directory.");
+ return NULL;
+ }
- if (!pa_get_home_dir(h, sizeof(h))) {
- pa_log_error("Failed to get home directory.");
- return NULL;
- }
+ if (stat(h, &st) < 0) {
+ pa_log_error("Failed to stat home directory %s: %s", h, pa_cstrerror(errno));
+ goto finish;
+ }
- if (stat(h, &st) < 0) {
- pa_log_error("Failed to stat home directory %s: %s", h, pa_cstrerror(errno));
- return NULL;
- }
+ if (st.st_uid != getuid()) {
+ pa_log_error("Home directory %s not ours.", h);
+ errno = EACCES;
+ goto finish;
+ }
+
+ ret = pa_sprintf_malloc("%s" PA_PATH_SEP ".pulse", h);
+
+finish:
+ pa_xfree(h);
+
+ return ret;
+}
- if (st.st_uid != getuid()) {
- pa_log_error("Home directory %s not ours.", d);
+char *pa_get_state_dir(void) {
+ char *d;
+
+ /* The state directory shall contain dynamic data that should be
+ * kept across reboots, and is private to this user */
+
+ if (!(d = pa_xstrdup(getenv("PULSE_STATE_PATH"))))
+ if (!(d = get_pulse_home()))
return NULL;
- }
- d = pa_sprintf_malloc("%s" PA_PATH_SEP ".pulse", h);
- }
+ /* If PULSE_STATE_PATH and PULSE_RUNTIME_PATH point to the same
+ * dir then this will break. */
- if (pa_make_secure_dir(d, m, (pid_t) -1, (pid_t) -1) < 0) {
+ if (pa_make_secure_dir(d, 0700U, (uid_t) -1, (gid_t) -1) < 0) {
pa_log_error("Failed to create secure directory: %s", pa_cstrerror(errno));
+ pa_xfree(d);
return NULL;
}
return d;
}
-char *pa_get_runtime_dir(void) {
- return get_dir(pa_in_system_mode() ? 0755 : 0700, "PULSE_RUNTIME_PATH");
-}
+char *pa_get_home_dir_malloc(void) {
+ char *homedir;
+ size_t allocated = 128;
-char *pa_get_state_dir(void) {
- return get_dir(0700, "PULSE_STATE_PATH");
-}
+ for (;;) {
+ homedir = pa_xmalloc(allocated);
-/* Try to open a configuration file. If "env" is specified, open the
- * value of the specified environment variable. Otherwise look for a
- * file "local" in the home directory or a file "global" in global
- * file system. If "result" is non-NULL, a pointer to a newly
- * allocated buffer containing the used configuration file is
- * stored there.*/
-FILE *pa_open_config_file(const char *global, const char *local, const char *env, char **result) {
- const char *fn;
-#ifdef OS_IS_WIN32
- char buf[PATH_MAX];
+ if (!pa_get_home_dir(homedir, allocated)) {
+ pa_xfree(homedir);
+ return NULL;
+ }
- if (!getenv(PULSE_ROOTENV))
- pa_set_root(NULL);
-#endif
+ if (strlen(homedir) < allocated - 1)
+ break;
- if (env && (fn = getenv(env))) {
- FILE *f;
+ pa_xfree(homedir);
+ allocated *= 2;
+ }
-#ifdef OS_IS_WIN32
- if (!ExpandEnvironmentStrings(fn, buf, PATH_MAX))
+ return homedir;
+}
+
+char *pa_get_binary_name_malloc(void) {
+ char *t;
+ size_t allocated = 128;
+
+ for (;;) {
+ t = pa_xmalloc(allocated);
+
+ if (!pa_get_binary_name(t, allocated)) {
+ pa_xfree(t);
+ return NULL;
+ }
+
+ if (strlen(t) < allocated - 1)
+ break;
+
+ pa_xfree(t);
+ allocated *= 2;
+ }
+
+ return t;
+}
+
+static char* make_random_dir(mode_t m) {
+ static const char table[] =
+ "abcdefghijklmnopqrstuvwxyz"
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+ "0123456789";
+
+ char *fn;
+ size_t pathlen;
+
+ fn = pa_sprintf_malloc("%s" PA_PATH_SEP "pulse-XXXXXXXXXXXX", pa_get_temp_dir());
+ pathlen = strlen(fn);
+
+ for (;;) {
+ size_t i;
+ int r;
+ mode_t u;
+ int saved_errno;
+
+ for (i = pathlen - 12; i < pathlen; i++)
+ fn[i] = table[rand() % (sizeof(table)-1)];
+
+ u = umask((~m) & 0777);
+ r = mkdir(fn, m);
+
+ saved_errno = errno;
+ umask(u);
+ errno = saved_errno;
+
+ if (r >= 0)
+ return fn;
+
+ if (errno != EEXIST) {
+ pa_log_error("Failed to create random directory %s: %s", fn, pa_cstrerror(errno));
+ pa_xfree(fn);
+ return NULL;
+ }
+ }
+}
+
+static int make_random_dir_and_link(mode_t m, const char *k) {
+ char *p;
+
+ if (!(p = make_random_dir(m)))
+ return -1;
+
+ if (symlink(p, k) < 0) {
+ int saved_errno = errno;
+
+ if (errno != EEXIST)
+ pa_log_error("Failed to symlink %s to %s: %s", k, p, pa_cstrerror(errno));
+
+ rmdir(p);
+ pa_xfree(p);
+
+ errno = saved_errno;
+ return -1;
+ }
+
+ pa_xfree(p);
+ return 0;
+}
+
+char *pa_get_runtime_dir(void) {
+ char *d, *k = NULL, *p = NULL, *t = NULL, *mid;
+ struct stat st;
+ mode_t m;
+
+ /* The runtime directory shall contain dynamic data that needs NOT
+ * to be kept accross reboots and is usuallly private to the user,
+ * except in system mode, where it might be accessible by other
+ * users, too. Since we need POSIX locking and UNIX sockets in
+ * this directory, we link it to a random subdir in /tmp, if it
+ * was not explicitly configured. */
+
+ m = pa_in_system_mode() ? 0755U : 0700U;
+
+ if ((d = getenv("PULSE_RUNTIME_PATH"))) {
+
+ if (pa_make_secure_dir(d, m, (uid_t) -1, (gid_t) -1) < 0) {
+ pa_log_error("Failed to create secure directory: %s", pa_cstrerror(errno));
+ goto fail;
+ }
+
+ return pa_xstrdup(d);
+ }
+
+ if (!(d = get_pulse_home()))
+ goto fail;
+
+ if (pa_make_secure_dir(d, m, (uid_t) -1, (gid_t) -1) < 0) {
+ pa_log_error("Failed to create secure directory: %s", pa_cstrerror(errno));
+ pa_xfree(d);
+ goto fail;
+ }
+
+ if (!(mid = pa_machine_id())) {
+ pa_xfree(d);
+ goto fail;
+ }
+
+ k = pa_sprintf_malloc("%s" PA_PATH_SEP "%s-runtime", d, mid);
+ pa_xfree(d);
+ pa_xfree(mid);
+
+ for (;;) {
+ /* OK, first let's check if the "runtime" symlink is already
+ * existant */
+
+ if (!(p = pa_readlink(k))) {
+
+ if (errno != ENOENT) {
+ pa_log_error("Failed to stat runtime directory %s: %s", k, pa_cstrerror(errno));
+ goto fail;
+ }
+
+ /* Hmm, so the runtime directory didn't exist yet, so let's
+ * create one in /tmp and symlink that to it */
+
+ if (make_random_dir_and_link(0700, k) < 0) {
+
+ /* Mhmm, maybe another process was quicker than us,
+ * let's check if that was valid */
+ if (errno == EEXIST)
+ continue;
+
+ goto fail;
+ }
+
+ return k;
+ }
+
+ /* Make sure that this actually makes sense */
+ if (!pa_is_path_absolute(p)) {
+ pa_log_error("Path %s in link %s is not absolute.", p, k);
+ errno = ENOENT;
+ goto fail;
+ }
+
+ /* Hmm, so this symlink is still around, make sure nobody fools
+ * us */
+
+ if (lstat(p, &st) < 0) {
+
+ if (errno != ENOENT) {
+ pa_log_error("Failed to stat runtime directory %s: %s", p, pa_cstrerror(errno));
+ goto fail;
+ }
+
+ } else {
+
+ if (S_ISDIR(st.st_mode) &&
+ (st.st_uid == getuid()) &&
+ ((st.st_mode & 0777) == 0700)) {
+
+ pa_xfree(p);
+ return k;
+ }
+
+ pa_log_info("Hmm, runtime path exists, but points to an invalid directory. Changing runtime directory.");
+ }
+
+ pa_xfree(p);
+ p = NULL;
+
+ /* Hmm, so the link points to some nonexisting or invalid
+ * dir. Let's replace it by a new link. We first create a
+ * temporary link and then rename that to allow concurrent
+ * execution of this function. */
+
+ t = pa_sprintf_malloc("%s.tmp", k);
+
+ if (make_random_dir_and_link(0700, t) < 0) {
+
+ if (errno != EEXIST) {
+ pa_log_error("Failed to symlink %s: %s", t, pa_cstrerror(errno));
+ goto fail;
+ }
+
+ pa_xfree(t);
+ t = NULL;
+
+ /* Hmm, someone lese was quicker then us. Let's give
+ * him some time to finish, and retry. */
+ pa_msleep(10);
+ continue;
+ }
+
+ /* OK, we succeeded in creating the temporary symlink, so
+ * let's rename it */
+ if (rename(t, k) < 0) {
+ pa_log_error("Failed to rename %s to %s: %s", t, k, pa_cstrerror(errno));
+ goto fail;
+ }
+
+ pa_xfree(t);
+ return k;
+ }
+
+fail:
+ pa_xfree(p);
+ pa_xfree(k);
+ pa_xfree(t);
+
+ return NULL;
+}
+
+/* Try to open a configuration file. If "env" is specified, open the
+ * value of the specified environment variable. Otherwise look for a
+ * file "local" in the home directory or a file "global" in global
+ * file system. If "result" is non-NULL, a pointer to a newly
+ * allocated buffer containing the used configuration file is
+ * stored there.*/
+FILE *pa_open_config_file(const char *global, const char *local, const char *env, char **result) {
+ const char *fn;
+#ifdef OS_IS_WIN32
+ char buf[PATH_MAX];
+
+ if (!getenv(PULSE_ROOTENV))
+ pa_set_root(NULL);
+#endif
+
+ if (env && (fn = getenv(env))) {
+ FILE *f;
+
+#ifdef OS_IS_WIN32
+ if (!ExpandEnvironmentStrings(fn, buf, PATH_MAX))
+ /* FIXME: Needs to set errno! */
return NULL;
fn = buf;
#endif
- if ((f = fopen(fn, "r"))) {
+ if ((f = pa_fopen_cloexec(fn, "r"))) {
if (result)
*result = pa_xstrdup(fn);
if (local) {
const char *e;
char *lfn;
- char h[PATH_MAX];
+ char *h;
FILE *f;
if ((e = getenv("PULSE_CONFIG_PATH")))
fn = lfn = pa_sprintf_malloc("%s" PA_PATH_SEP "%s", e, local);
- else if (pa_get_home_dir(h, sizeof(h)))
+ else if ((h = pa_get_home_dir_malloc())) {
fn = lfn = pa_sprintf_malloc("%s" PA_PATH_SEP ".pulse" PA_PATH_SEP "%s", h, local);
+ pa_xfree(h);
+ } else
+ return NULL;
#ifdef OS_IS_WIN32
if (!ExpandEnvironmentStrings(lfn, buf, PATH_MAX)) {
+ /* FIXME: Needs to set errno! */
pa_xfree(lfn);
return NULL;
}
fn = buf;
#endif
- if ((f = fopen(fn, "r"))) {
+ if ((f = pa_fopen_cloexec(fn, "r"))) {
if (result)
*result = pa_xstrdup(fn);
#ifdef OS_IS_WIN32
if (!ExpandEnvironmentStrings(global, buf, PATH_MAX))
+ /* FIXME: Needs to set errno! */
return NULL;
global = buf;
#endif
- if ((f = fopen(global, "r"))) {
+ if ((f = pa_fopen_cloexec(global, "r"))) {
if (result)
*result = pa_xstrdup(global);
return f;
}
- } else
- errno = ENOENT;
+ }
+ errno = ENOENT;
return NULL;
}
#endif
if (env && (fn = getenv(env))) {
+
#ifdef OS_IS_WIN32
if (!ExpandEnvironmentStrings(fn, buf, PATH_MAX))
+ /* FIXME: Needs to set errno! */
return NULL;
fn = buf;
#endif
if (local) {
const char *e;
char *lfn;
- char h[PATH_MAX];
+ char *h;
if ((e = getenv("PULSE_CONFIG_PATH")))
fn = lfn = pa_sprintf_malloc("%s" PA_PATH_SEP "%s", e, local);
- else if (pa_get_home_dir(h, sizeof(h)))
+ else if ((h = pa_get_home_dir_malloc())) {
fn = lfn = pa_sprintf_malloc("%s" PA_PATH_SEP ".pulse" PA_PATH_SEP "%s", h, local);
+ pa_xfree(h);
+ } else
+ return NULL;
#ifdef OS_IS_WIN32
if (!ExpandEnvironmentStrings(lfn, buf, PATH_MAX)) {
+ /* FIXME: Needs to set errno! */
pa_xfree(lfn);
return NULL;
}
if (global) {
#ifdef OS_IS_WIN32
if (!ExpandEnvironmentStrings(global, buf, PATH_MAX))
+ /* FIXME: Needs to set errno! */
return NULL;
global = buf;
#endif
- if (access(fn, R_OK) == 0)
+ if (access(global, R_OK) == 0)
return pa_xstrdup(global);
- } else
- errno = ENOENT;
+ }
+
+ errno = ENOENT;
return NULL;
}
if (c >= 'a' && c <= 'f')
return c - 'a' + 10;
+ errno = EINVAL;
return -1;
}
/* if fn is null return the PulseAudio run time path in s (~/.pulse)
* if fn is non-null and starts with / return fn
* otherwise append fn to the run time path and return it */
-static char *get_path(const char *fn, pa_bool_t rt) {
+static char *get_path(const char *fn, pa_bool_t prependmid, pa_bool_t rt) {
char *rtp;
- if (pa_is_path_absolute(fn))
- return pa_xstrdup(fn);
-
rtp = rt ? pa_get_runtime_dir() : pa_get_state_dir();
- if (!rtp)
- return NULL;
-
if (fn) {
char *r;
- r = pa_sprintf_malloc("%s" PA_PATH_SEP "%s", rtp, fn);
+
+ if (pa_is_path_absolute(fn))
+ return pa_xstrdup(fn);
+
+ if (!rtp)
+ return NULL;
+
+ if (prependmid) {
+ char *mid;
+
+ if (!(mid = pa_machine_id())) {
+ pa_xfree(rtp);
+ return NULL;
+ }
+
+ r = pa_sprintf_malloc("%s" PA_PATH_SEP "%s-%s", rtp, mid, fn);
+ pa_xfree(mid);
+ } else
+ r = pa_sprintf_malloc("%s" PA_PATH_SEP "%s", rtp, fn);
+
pa_xfree(rtp);
return r;
} else
}
char *pa_runtime_path(const char *fn) {
- return get_path(fn, 1);
+ return get_path(fn, FALSE, TRUE);
}
-char *pa_state_path(const char *fn) {
- return get_path(fn, 0);
+char *pa_state_path(const char *fn, pa_bool_t appendmid) {
+ return get_path(fn, appendmid, FALSE);
}
/* Convert the string s to a signed integer in *ret_i */
errno = 0;
l = strtol(s, &x, 0);
- if (!x || *x || errno != 0)
+ if (!x || *x || errno) {
+ if (!errno)
+ errno = EINVAL;
return -1;
+ }
- if ((int32_t) l != l)
+ if ((int32_t) l != l) {
+ errno = ERANGE;
return -1;
+ }
*ret_i = (int32_t) l;
errno = 0;
l = strtoul(s, &x, 0);
- if (!x || *x || errno != 0)
+ if (!x || *x || errno) {
+ if (!errno)
+ errno = EINVAL;
return -1;
+ }
- if ((uint32_t) l != l)
+ if ((uint32_t) l != l) {
+ errno = ERANGE;
return -1;
+ }
*ret_u = (uint32_t) l;
int pa_atod(const char *s, double *ret_d) {
char *x = NULL;
double f;
- int r = 0;
pa_assert(s);
pa_assert(ret_d);
f = strtod(s, &x);
}
- if (!x || *x || errno != 0)
- r = -1;
- else
- *ret_d = f;
+ if (!x || *x || errno) {
+ if (!errno)
+ errno = EINVAL;
+ return -1;
+ }
- return r;
+ *ret_d = f;
+
+ return 0;
}
/* Same as snprintf, but guarantees NUL-termination on every platform */
-int pa_snprintf(char *str, size_t size, const char *format, ...) {
- int ret;
+size_t pa_snprintf(char *str, size_t size, const char *format, ...) {
+ size_t ret;
va_list ap;
pa_assert(str);
}
/* Same as vsnprintf, but guarantees NUL-termination on every platform */
-int pa_vsnprintf(char *str, size_t size, const char *format, va_list ap) {
+size_t pa_vsnprintf(char *str, size_t size, const char *format, va_list ap) {
int ret;
pa_assert(str);
str[size-1] = 0;
if (ret < 0)
- ret = strlen(str);
+ return strlen(str);
+
+ if ((size_t) ret > size-1)
+ return size-1;
- return PA_MIN((int) size-1, ret);
+ return (size_t) ret;
}
/* Truncate the specified string, but guarantee that the string
size_t l = 128;
for (;;) {
- char *p = pa_xnew(char, l);
+ char *p = pa_xmalloc(l);
if (getcwd(p, l))
return p;
pa_assert(l > 0);
a = PA_PAGE_ALIGN_PTR(p);
- size = (const uint8_t*) p + l - (const uint8_t*) a;
+ size = (size_t) ((const uint8_t*) p + l - (const uint8_t*) a);
#ifdef HAVE_POSIX_MADVISE
if ((r = posix_madvise((void*) a, size, POSIX_MADV_WILLNEED)) == 0) {
if (rlim.rlim_cur < PA_PAGE_SIZE) {
pa_log_debug("posix_madvise() failed (or doesn't exist), resource limits don't allow mlock(), can't page in data: %s", pa_cstrerror(r));
+ errno = EPERM;
return (void*) p;
}
- bs = PA_PAGE_ALIGN(rlim.rlim_cur);
+ bs = PA_PAGE_ALIGN((size_t) rlim.rlim_cur);
#else
bs = PA_PAGE_SIZE*4;
#endif
char *c;
ssize_t n;
- c = pa_xnew(char, l);
+ c = pa_xmalloc(l);
if ((n = readlink(p, c, l-1)) < 0) {
pa_xfree(c);
int pa_close_all(int except_fd, ...) {
va_list ap;
- int n = 0, i, r;
- int *p;
+ unsigned n = 0, i;
+ int r, *p;
va_start(ap, except_fd);
va_end(ap);
r = pa_close_allv(p);
- free(p);
+ pa_xfree(p);
return r;
}
int pa_close_allv(const int except_fds[]) {
struct rlimit rl;
- int fd;
- int saved_errno;
+ int maxfd, fd;
#ifdef __linux__
-
+ int saved_errno;
DIR *d;
if ((d = opendir("/proc/self/fd"))) {
#endif
- if (getrlimit(RLIMIT_NOFILE, &rl) < 0)
- return -1;
+ if (getrlimit(RLIMIT_NOFILE, &rl) >= 0)
+ maxfd = (int) rl.rlim_max;
+ else
+ maxfd = sysconf(_SC_OPEN_MAX);
- for (fd = 3; fd < (int) rl.rlim_max; fd++) {
+ for (fd = 3; fd < maxfd; fd++) {
int i;
pa_bool_t found;
int pa_unblock_sigs(int except, ...) {
va_list ap;
- int n = 0, i, r;
- int *p;
+ unsigned n = 0, i;
+ int r, *p;
va_start(ap, except);
int pa_reset_sigs(int except, ...) {
va_list ap;
- int n = 0, i, r;
- int *p;
+ unsigned n = 0, i;
+ int *p, r;
va_start(ap, except);
p[i++] = except;
while ((sig = va_arg(ap, int)) >= 0)
- sig = p[i++];
+ p[i++] = sig;
}
p[i] = -1;
int pa_reset_sigsv(const int except[]) {
int sig;
- for (sig = 1; sig < _NSIG; sig++) {
+ for (sig = 1; sig < NSIG; sig++) {
pa_bool_t reset = TRUE;
switch (sig) {
pa_assert(key);
pa_assert(value);
+ /* This is not thread-safe */
+
putenv(pa_sprintf_malloc("%s=%s", key, value));
}
+void pa_set_env_and_record(const char *key, const char *value) {
+ pa_assert(key);
+ pa_assert(value);
+
+ /* This is not thread-safe */
+
+ pa_set_env(key, value);
+ recorded_env = pa_strlist_prepend(recorded_env, key);
+}
+
+void pa_unset_env_recorded(void) {
+
+ /* This is not thread-safe */
+
+ for (;;) {
+ char *s;
+
+ recorded_env = pa_strlist_pop(recorded_env, &s);
+
+ if (!s)
+ break;
+
+ unsetenv(s);
+ pa_xfree(s);
+ }
+}
+
pa_bool_t pa_in_system_mode(void) {
const char *e;
return !!atoi(e);
}
+
+char *pa_get_user_name_malloc(void) {
+ ssize_t k;
+ char *u;
+
+#ifdef _SC_LOGIN_NAME_MAX
+ k = (ssize_t) sysconf(_SC_LOGIN_NAME_MAX);
+
+ if (k <= 0)
+#endif
+ k = 32;
+
+ u = pa_xnew(char, k+1);
+
+ if (!(pa_get_user_name(u, k))) {
+ pa_xfree(u);
+ return NULL;
+ }
+
+ return u;
+}
+
+char *pa_get_host_name_malloc(void) {
+ size_t l;
+
+ l = 100;
+ for (;;) {
+ char *c;
+
+ c = pa_xmalloc(l);
+
+ if (!pa_get_host_name(c, l)) {
+
+ if (errno != EINVAL && errno != ENAMETOOLONG)
+ break;
+
+ } else if (strlen(c) < l-1) {
+ char *u;
+
+ if (*c == 0) {
+ pa_xfree(c);
+ break;
+ }
+
+ u = pa_utf8_filter(c);
+ pa_xfree(c);
+ return u;
+ }
+
+ /* Hmm, the hostname is as long the space we offered the
+ * function, we cannot know if it fully fit in, so let's play
+ * safe and retry. */
+
+ pa_xfree(c);
+ l *= 2;
+ }
+
+ return NULL;
+}
+
+char *pa_machine_id(void) {
+ FILE *f;
+ char *h;
+
+ /* The returned value is supposed be some kind of ascii identifier
+ * that is unique and stable across reboots. */
+
+ /* First we try the D-Bus UUID, which is the best option we have,
+ * since it fits perfectly our needs and is not as volatile as the
+ * hostname which might be set from dhcp. */
+
+ if ((f = pa_fopen_cloexec(PA_MACHINE_ID, "r"))) {
+ char ln[34] = "", *r;
+
+ r = fgets(ln, sizeof(ln)-1, f);
+ fclose(f);
+
+ pa_strip_nl(ln);
+
+ if (r && ln[0])
+ return pa_utf8_filter(ln);
+ }
+
+ if ((h = pa_get_host_name_malloc()))
+ return h;
+
+ /* If no hostname was set we use the POSIX hostid. It's usually
+ * the IPv4 address. Might not be that stable. */
+ return pa_sprintf_malloc("%08lx", (unsigned long) gethostid);
+}
+
+char *pa_session_id(void) {
+ const char *e;
+
+ if (!(e = getenv("XDG_SESSION_COOKIE")))
+ return NULL;
+
+ return pa_utf8_filter(e);
+}
+
+char *pa_uname_string(void) {
+ struct utsname u;
+
+ pa_assert_se(uname(&u) >= 0);
+
+ return pa_sprintf_malloc("%s %s %s %s", u.sysname, u.machine, u.release, u.version);
+}
+
+#ifdef HAVE_VALGRIND_MEMCHECK_H
+pa_bool_t pa_in_valgrind(void) {
+ static int b = 0;
+
+ /* To make heisenbugs a bit simpler to find we check for $VALGRIND
+ * here instead of really checking whether we run in valgrind or
+ * not. */
+
+ if (b < 1)
+ b = getenv("VALGRIND") ? 2 : 1;
+
+ return b > 1;
+}
+#endif
+
+unsigned pa_gcd(unsigned a, unsigned b) {
+
+ while (b > 0) {
+ unsigned t = b;
+ b = a % b;
+ a = t;
+ }
+
+ return a;
+}
+
+void pa_reduce(unsigned *num, unsigned *den) {
+
+ unsigned gcd = pa_gcd(*num, *den);
+
+ if (gcd <= 0)
+ return;
+
+ *num /= gcd;
+ *den /= gcd;
+
+ pa_assert(pa_gcd(*num, *den) == 1);
+}
+
+unsigned pa_ncpus(void) {
+ long ncpus;
+
+#ifdef _SC_NPROCESSORS_CONF
+ ncpus = sysconf(_SC_NPROCESSORS_CONF);
+#else
+ ncpus = 1;
+#endif
+
+ return ncpus <= 0 ? 1 : (unsigned) ncpus;
+}
+
+char *pa_replace(const char*s, const char*a, const char *b) {
+ pa_strbuf *sb;
+ size_t an;
+
+ pa_assert(s);
+ pa_assert(a);
+ pa_assert(b);
+
+ an = strlen(a);
+ sb = pa_strbuf_new();
+
+ for (;;) {
+ const char *p;
+
+ if (!(p = strstr(s, a)))
+ break;
+
+ pa_strbuf_putsn(sb, s, p-s);
+ pa_strbuf_puts(sb, b);
+ s = p + an;
+ }
+
+ pa_strbuf_puts(sb, s);
+
+ return pa_strbuf_tostring_free(sb);
+}
+
+char *pa_escape(const char *p, const char *chars) {
+ const char *s;
+ const char *c;
+ pa_strbuf *buf = pa_strbuf_new();
+
+ for (s = p; *s; ++s) {
+ if (*s == '\\')
+ pa_strbuf_putc(buf, '\\');
+ else if (chars) {
+ for (c = chars; *c; ++c) {
+ if (*s == *c) {
+ pa_strbuf_putc(buf, '\\');
+ break;
+ }
+ }
+ }
+ pa_strbuf_putc(buf, *s);
+ }
+
+ return pa_strbuf_tostring_free(buf);
+}
+
+char *pa_unescape(char *p) {
+ char *s, *d;
+ pa_bool_t escaped = FALSE;
+
+ for (s = p, d = p; *s; s++) {
+ if (!escaped && *s == '\\') {
+ escaped = TRUE;
+ continue;
+ }
+
+ *(d++) = *s;
+ escaped = FALSE;
+ }
+
+ *d = 0;
+
+ return p;
+}
+
+char *pa_realpath(const char *path) {
+ char *t;
+ pa_assert(path);
+
+ /* We want only abolsute paths */
+ if (path[0] != '/') {
+ errno = EINVAL;
+ return NULL;
+ }
+
+#if defined(__GLIBC__) || defined(__APPLE__)
+ {
+ char *r;
+
+ if (!(r = realpath(path, NULL)))
+ return NULL;
+
+ /* We copy this here in case our pa_xmalloc() is not
+ * implemented on top of libc malloc() */
+ t = pa_xstrdup(r);
+ pa_xfree(r);
+ }
+#elif defined(PATH_MAX)
+ {
+ char *path_buf;
+ path_buf = pa_xmalloc(PATH_MAX);
+
+ if (!(t = realpath(path, path_buf))) {
+ pa_xfree(path_buf);
+ return NULL;
+ }
+ }
+#else
+#error "It's not clear whether this system supports realpath(..., NULL) like GNU libc does. If it doesn't we need a private version of realpath() here."
+#endif
+
+ return t;
+}
+
+void pa_disable_sigpipe(void) {
+
+#ifdef SIGPIPE
+ struct sigaction sa;
+
+ pa_zero(sa);
+
+ if (sigaction(SIGPIPE, NULL, &sa) < 0) {
+ pa_log("sigaction(): %s", pa_cstrerror(errno));
+ return;
+ }
+
+ sa.sa_handler = SIG_IGN;
+
+ if (sigaction(SIGPIPE, &sa, NULL) < 0) {
+ pa_log("sigaction(): %s", pa_cstrerror(errno));
+ return;
+ }
+#endif
+}
+
+void pa_xfreev(void**a) {
+ void **p;
+
+ if (!a)
+ return;
+
+ for (p = a; *p; p++)
+ pa_xfree(*p);
+
+ pa_xfree(a);
+}
+
+char **pa_split_spaces_strv(const char *s) {
+ char **t, *e;
+ unsigned i = 0, n = 8;
+ const char *state = NULL;
+
+ t = pa_xnew(char*, n);
+ while ((e = pa_split_spaces(s, &state))) {
+ t[i++] = e;
+
+ if (i >= n) {
+ n *= 2;
+ t = pa_xrenew(char*, t, n);
+ }
+ }
+
+ if (i <= 0) {
+ pa_xfree(t);
+ return NULL;
+ }
+
+ t[i] = NULL;
+ return t;
+}
+
+char* pa_maybe_prefix_path(const char *path, const char *prefix) {
+ pa_assert(path);
+
+ if (pa_is_path_absolute(path))
+ return pa_xstrdup(path);
+
+ return pa_sprintf_malloc("%s" PA_PATH_SEP "%s", prefix, path);
+}
+
+size_t pa_pipe_buf(int fd) {
+
+#ifdef _PC_PIPE_BUF
+ long n;
+
+ if ((n = fpathconf(fd, _PC_PIPE_BUF)) >= 0)
+ return (size_t) n;
+#endif
+
+#ifdef PIPE_BUF
+ return PIPE_BUF;
+#else
+ return 4096;
+#endif
+}
+
+void pa_reset_personality(void) {
+
+#ifdef __linux__
+ if (personality(PER_LINUX) < 0)
+ pa_log_warn("Uh, personality() failed: %s", pa_cstrerror(errno));
+#endif
+
+}
+
+#if defined(__linux__) && !defined(__OPTIMIZE__)
+
+pa_bool_t pa_run_from_build_tree(void) {
+ char *rp;
+ pa_bool_t b = FALSE;
+
+ /* We abuse __OPTIMIZE__ as a check whether we are a debug build
+ * or not. */
+
+ if ((rp = pa_readlink("/proc/self/exe"))) {
+ b = pa_startswith(rp, PA_BUILDDIR);
+ pa_xfree(rp);
+ }
+
+ return b;
+}
+
+#endif
+
+const char *pa_get_temp_dir(void) {
+ const char *t;
+
+ if ((t = getenv("TMPDIR")) &&
+ pa_is_path_absolute(t))
+ return t;
+
+ if ((t = getenv("TMP")) &&
+ pa_is_path_absolute(t))
+ return t;
+
+ if ((t = getenv("TEMP")) &&
+ pa_is_path_absolute(t))
+ return t;
+
+ if ((t = getenv("TEMPDIR")) &&
+ pa_is_path_absolute(t))
+ return t;
+
+ return "/tmp";
+}
+
+int pa_open_cloexec(const char *fn, int flags, mode_t mode) {
+ int fd;
+
+#ifdef O_NOCTTY
+ flags |= O_NOCTTY;
+#endif
+
+#ifdef O_CLOEXEC
+ if ((fd = open(fn, flags|O_CLOEXEC, mode)) >= 0)
+ goto finish;
+
+ if (errno != EINVAL)
+ return fd;
+#endif
+
+ if ((fd = open(fn, flags, mode)) < 0)
+ return fd;
+
+finish:
+ /* Some implementations might simply ignore O_CLOEXEC if it is not
+ * understood, make sure FD_CLOEXEC is enabled anyway */
+
+ pa_make_fd_cloexec(fd);
+ return fd;
+}
+
+int pa_socket_cloexec(int domain, int type, int protocol) {
+ int fd;
+
+#ifdef SOCK_CLOEXEC
+ if ((fd = socket(domain, type | SOCK_CLOEXEC, protocol)) >= 0)
+ goto finish;
+
+ if (errno != EINVAL)
+ return fd;
+#endif
+
+ if ((fd = socket(domain, type, protocol)) < 0)
+ return fd;
+
+finish:
+ /* Some implementations might simply ignore SOCK_CLOEXEC if it is
+ * not understood, make sure FD_CLOEXEC is enabled anyway */
+
+ pa_make_fd_cloexec(fd);
+ return fd;
+}
+
+int pa_pipe_cloexec(int pipefd[2]) {
+ int r;
+
+#ifdef HAVE_PIPE2
+ if ((r = pipe2(pipefd, O_CLOEXEC)) >= 0)
+ goto finish;
+
+ if (errno != EINVAL && errno != ENOSYS)
+ return r;
+
+#endif
+
+ if ((r = pipe(pipefd)) < 0)
+ return r;
+
+finish:
+ pa_make_fd_cloexec(pipefd[0]);
+ pa_make_fd_cloexec(pipefd[1]);
+
+ return 0;
+}
+
+int pa_accept_cloexec(int sockfd, struct sockaddr *addr, socklen_t *addrlen) {
+ int fd;
+
+#ifdef HAVE_ACCEPT4
+ if ((fd = accept4(sockfd, addr, addrlen, SOCK_CLOEXEC)) >= 0)
+ goto finish;
+
+ if (errno != EINVAL && errno != ENOSYS)
+ return fd;
+
+#endif
+
+ if ((fd = accept(sockfd, addr, addrlen)) < 0)
+ return fd;
+
+finish:
+ pa_make_fd_cloexec(fd);
+ return fd;
+}
+
+FILE* pa_fopen_cloexec(const char *path, const char *mode) {
+ FILE *f;
+ char *m;
+
+ m = pa_sprintf_malloc("%se", mode);
+
+ errno = 0;
+ if ((f = fopen(path, m))) {
+ pa_xfree(m);
+ goto finish;
+ }
+
+ pa_xfree(m);
+
+ if (errno != EINVAL)
+ return NULL;
+
+ if (!(f = fopen(path, mode)))
+ return NULL;
+
+finish:
+ pa_make_fd_cloexec(fileno(f));
+ return f;
+}
+
+void pa_nullify_stdfds(void) {
+
+#ifndef OS_IS_WIN32
+ pa_close(STDIN_FILENO);
+ pa_close(STDOUT_FILENO);
+ pa_close(STDERR_FILENO);
+
+ pa_assert_se(open("/dev/null", O_RDONLY) == STDIN_FILENO);
+ pa_assert_se(open("/dev/null", O_WRONLY) == STDOUT_FILENO);
+ pa_assert_se(open("/dev/null", O_WRONLY) == STDERR_FILENO);
+#else
+ FreeConsole();
+#endif
+
+}
+
+char *pa_read_line_from_file(const char *fn) {
+ FILE *f;
+ char ln[256] = "", *r;
+
+ if (!(f = pa_fopen_cloexec(fn, "r")))
+ return NULL;
+
+ r = fgets(ln, sizeof(ln)-1, f);
+ fclose(f);
+
+ if (!r) {
+ errno = EIO;
+ return NULL;
+ }
+
+ pa_strip_nl(ln);
+ return pa_xstrdup(ln);
+}
+
+pa_bool_t pa_running_in_vm(void) {
+
+#if defined(__i386__) || defined(__x86_64__)
+
+ /* Both CPUID and DMI are x86 specific interfaces... */
+
+ uint32_t eax = 0x40000000;
+ union {
+ uint32_t sig32[3];
+ char text[13];
+ } sig;
+
+#ifdef __linux__
+ const char *const dmi_vendors[] = {
+ "/sys/class/dmi/id/sys_vendor",
+ "/sys/class/dmi/id/board_vendor",
+ "/sys/class/dmi/id/bios_vendor"
+ };
+
+ unsigned i;
+
+ for (i = 0; i < PA_ELEMENTSOF(dmi_vendors); i++) {
+ char *s;
+
+ if ((s = pa_read_line_from_file(dmi_vendors[i]))) {
+
+ if (pa_startswith(s, "QEMU") ||
+ /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
+ pa_startswith(s, "VMware") ||
+ pa_startswith(s, "VMW") ||
+ pa_startswith(s, "Microsoft Corporation") ||
+ pa_startswith(s, "innotek GmbH") ||
+ pa_startswith(s, "Xen")) {
+
+ pa_xfree(s);
+ return TRUE;
+ }
+
+ pa_xfree(s);
+ }
+ }
+
+#endif
+
+ /* http://lwn.net/Articles/301888/ */
+ pa_zero(sig);
+
+ __asm__ __volatile__ (
+ /* ebx/rbx is being used for PIC! */
+ " push %%"PA_REG_b" \n\t"
+ " cpuid \n\t"
+ " mov %%ebx, %1 \n\t"
+ " pop %%"PA_REG_b" \n\t"
+
+ : "=a" (eax), "=r" (sig.sig32[0]), "=c" (sig.sig32[1]), "=d" (sig.sig32[2])
+ : "0" (eax)
+ );
+
+ if (pa_streq(sig.text, "XenVMMXenVMM") ||
+ pa_streq(sig.text, "KVMKVMKVM") ||
+ /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
+ pa_streq(sig.text, "VMwareVMware") ||
+ /* http://msdn.microsoft.com/en-us/library/bb969719.aspx */
+ pa_streq(sig.text, "Microsoft Hv"))
+ return TRUE;
+
+#endif
+
+ return FALSE;
+}