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-rw-r--r--src/pulsecore/core-util.c2045
1 files changed, 2045 insertions, 0 deletions
diff --git a/src/pulsecore/core-util.c b/src/pulsecore/core-util.c
new file mode 100644
index 00000000..d259fb16
--- /dev/null
+++ b/src/pulsecore/core-util.c
@@ -0,0 +1,2045 @@
+/***
+ This file is part of PulseAudio.
+
+ Copyright 2004-2006 Lennart Poettering
+ Copyright 2004 Joe Marcus Clarke
+ Copyright 2006-2007 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 <stdarg.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <limits.h>
+#include <time.h>
+#include <ctype.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <dirent.h>
+
+#ifdef HAVE_STRTOF_L
+#include <locale.h>
+#endif
+
+#ifdef HAVE_SCHED_H
+#include <sched.h>
+#endif
+
+#ifdef HAVE_SYS_RESOURCE_H
+#include <sys/resource.h>
+#endif
+
+#ifdef HAVE_SYS_CAPABILITY_H
+#include <sys/capability.h>
+#endif
+
+#ifdef HAVE_SYS_MMAN_H
+#include <sys/mman.h>
+#endif
+
+#ifdef HAVE_PTHREAD
+#include <pthread.h>
+#endif
+
+#ifdef HAVE_NETDB_H
+#include <netdb.h>
+#endif
+
+#ifdef HAVE_WINDOWS_H
+#include <windows.h>
+#endif
+
+#ifdef HAVE_PWD_H
+#include <pwd.h>
+#endif
+
+#ifdef HAVE_GRP_H
+#include <grp.h>
+#endif
+
+#ifdef HAVE_LIBSAMPLERATE
+#include <samplerate.h>
+#endif
+
+#include <pulse/xmalloc.h>
+#include <pulse/util.h>
+#include <pulse/utf8.h>
+
+#include <pulsecore/core-error.h>
+#include <pulsecore/winsock.h>
+#include <pulsecore/log.h>
+#include <pulsecore/macro.h>
+#include <pulsecore/thread.h>
+
+#include "core-util.h"
+
+/* Not all platforms have this */
+#ifndef MSG_NOSIGNAL
+#define MSG_NOSIGNAL 0
+#endif
+
+#ifdef OS_IS_WIN32
+
+#define PULSE_ROOTENV "PULSE_ROOT"
+
+int pa_set_root(HANDLE handle) {
+ char library_path[MAX_PATH + sizeof(PULSE_ROOTENV) + 1], *sep;
+
+ strcpy(library_path, PULSE_ROOTENV "=");
+
+ if (!GetModuleFileName(handle, library_path + sizeof(PULSE_ROOTENV), MAX_PATH))
+ return 0;
+
+ sep = strrchr(library_path, PA_PATH_SEP_CHAR);
+ if (sep)
+ *sep = '\0';
+
+ if (_putenv(library_path) < 0)
+ return 0;
+
+ return 1;
+}
+
+#endif
+
+/** Make a file descriptor nonblock. Doesn't do any error checking */
+void pa_make_fd_nonblock(int fd) {
+
+#ifdef O_NONBLOCK
+ int v;
+ pa_assert(fd >= 0);
+
+ pa_assert_se((v = fcntl(fd, F_GETFL)) >= 0);
+
+ if (!(v & O_NONBLOCK))
+ pa_assert_se(fcntl(fd, F_SETFL, v|O_NONBLOCK) >= 0);
+
+#elif defined(OS_IS_WIN32)
+ u_long arg = 1;
+ if (ioctlsocket(fd, FIONBIO, &arg) < 0) {
+ pa_assert_se(WSAGetLastError() == WSAENOTSOCK);
+ pa_log_warn("Only sockets can be made non-blocking!");
+ }
+#else
+ pa_log_warn("Non-blocking I/O not supported.!");
+#endif
+
+}
+
+/* Set the FD_CLOEXEC flag for a fd */
+void pa_make_fd_cloexec(int fd) {
+
+#ifdef FD_CLOEXEC
+ int v;
+ pa_assert(fd >= 0);
+
+ pa_assert_se((v = fcntl(fd, F_GETFD, 0)) >= 0);
+
+ if (!(v & FD_CLOEXEC))
+ pa_assert_se(fcntl(fd, F_SETFD, v|FD_CLOEXEC) >= 0);
+#endif
+
+}
+
+/** 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;
+
+ pa_assert(dir);
+
+#ifdef OS_IS_WIN32
+ r = mkdir(dir);
+#else
+ {
+ mode_t u;
+ u = umask(~m);
+ r = mkdir(dir, m);
+ umask(u);
+ }
+#endif
+
+ if (r < 0 && errno != EEXIST)
+ return -1;
+
+#ifdef HAVE_CHOWN
+ if (uid == (uid_t)-1)
+ uid = getuid();
+ if (gid == (gid_t)-1)
+ gid = getgid();
+ (void) chown(dir, uid, gid);
+#endif
+
+#ifdef HAVE_CHMOD
+ chmod(dir, m);
+#endif
+
+#ifdef HAVE_LSTAT
+ if (lstat(dir, &st) < 0)
+#else
+ if (stat(dir, &st) < 0)
+#endif
+ goto fail;
+
+#ifndef OS_IS_WIN32
+ if (!S_ISDIR(st.st_mode) ||
+ (st.st_uid != uid) ||
+ (st.st_gid != gid) ||
+ ((st.st_mode & 0777) != m)) {
+ errno = EACCES;
+ goto fail;
+ }
+#else
+ pa_log_warn("Secure directory creation not supported on Win32.");
+#endif
+
+ return 0;
+
+fail:
+ rmdir(dir);
+ return -1;
+}
+
+/* Return a newly allocated sting containing the parent directory of the specified file */
+char *pa_parent_dir(const char *fn) {
+ char *slash, *dir = pa_xstrdup(fn);
+
+ if ((slash = (char*) pa_path_get_filename(dir)) == dir) {
+ pa_xfree(dir);
+ return NULL;
+ }
+
+ *(slash-1) = 0;
+ return dir;
+}
+
+/* Creates a the parent directory of the specified path securely */
+int pa_make_secure_parent_dir(const char *fn, mode_t m, uid_t uid, gid_t gid) {
+ int ret = -1;
+ char *dir;
+
+ if (!(dir = pa_parent_dir(fn)))
+ goto finish;
+
+ if (pa_make_secure_dir(dir, m, uid, gid) < 0)
+ goto finish;
+
+ ret = 0;
+
+finish:
+ pa_xfree(dir);
+ return ret;
+}
+
+/** Platform independent read function. Necessary since not all
+ * systems treat all file descriptors equal. If type is
+ * non-NULL it is used to cache the type of the fd. This is
+ * useful for making sure that only a single syscall is executed per
+ * function call. The variable pointed to should be initialized to 0
+ * by the caller. */
+ssize_t pa_read(int fd, void *buf, size_t count, int *type) {
+
+#ifdef OS_IS_WIN32
+
+ if (!type || *type == 0) {
+ ssize_t r;
+
+ if ((r = recv(fd, buf, count, 0)) >= 0)
+ return r;
+
+ if (WSAGetLastError() != WSAENOTSOCK) {
+ errno = WSAGetLastError();
+ return r;
+ }
+
+ if (type)
+ *type = 1;
+ }
+
+#endif
+
+ return read(fd, buf, count);
+}
+
+/** Similar to pa_read(), but handles writes */
+ssize_t pa_write(int fd, const void *buf, size_t count, int *type) {
+
+ if (!type || *type == 0) {
+ ssize_t r;
+
+ if ((r = send(fd, buf, count, MSG_NOSIGNAL)) >= 0)
+ return r;
+
+#ifdef OS_IS_WIN32
+ if (WSAGetLastError() != WSAENOTSOCK) {
+ errno = WSAGetLastError();
+ return r;
+ }
+#else
+ if (errno != ENOTSOCK)
+ return r;
+#endif
+
+ if (type)
+ *type = 1;
+ }
+
+ return write(fd, buf, count);
+}
+
+/** Calls read() in a loop. Makes sure that as much as 'size' bytes,
+ * unless EOF is reached or an error occured */
+ssize_t pa_loop_read(int fd, void*data, size_t size, int *type) {
+ ssize_t ret = 0;
+ int _type;
+
+ pa_assert(fd >= 0);
+ pa_assert(data);
+ pa_assert(size);
+
+ if (!type) {
+ _type = 0;
+ type = &_type;
+ }
+
+ while (size > 0) {
+ ssize_t r;
+
+ if ((r = pa_read(fd, data, size, type)) < 0)
+ return r;
+
+ if (r == 0)
+ break;
+
+ ret += r;
+ data = (uint8_t*) data + r;
+ size -= r;
+ }
+
+ return ret;
+}
+
+/** Similar to pa_loop_read(), but wraps write() */
+ssize_t pa_loop_write(int fd, const void*data, size_t size, int *type) {
+ ssize_t ret = 0;
+ int _type;
+
+ pa_assert(fd >= 0);
+ pa_assert(data);
+ pa_assert(size);
+
+ if (!type) {
+ _type = 0;
+ type = &_type;
+ }
+
+ while (size > 0) {
+ ssize_t r;
+
+ if ((r = pa_write(fd, data, size, type)) < 0)
+ return r;
+
+ if (r == 0)
+ break;
+
+ ret += r;
+ data = (const uint8_t*) data + r;
+ size -= r;
+ }
+
+ return ret;
+}
+
+/** Platform independent read function. Necessary since not all
+ * systems treat all file descriptors equal. */
+int pa_close(int fd) {
+
+#ifdef OS_IS_WIN32
+ int ret;
+
+ if ((ret = closesocket(fd)) == 0)
+ return 0;
+
+ if (WSAGetLastError() != WSAENOTSOCK) {
+ errno = WSAGetLastError();
+ return ret;
+ }
+#endif
+
+ return close(fd);
+}
+
+/* Print a warning messages in case that the given signal is not
+ * blocked or trapped */
+void pa_check_signal_is_blocked(int sig) {
+#ifdef HAVE_SIGACTION
+ struct sigaction sa;
+ sigset_t set;
+
+ /* If POSIX threads are supported use thread-aware
+ * pthread_sigmask() function, to check if the signal is
+ * blocked. Otherwise fall back to sigprocmask() */
+
+#ifdef HAVE_PTHREAD
+ if (pthread_sigmask(SIG_SETMASK, NULL, &set) < 0) {
+#endif
+ if (sigprocmask(SIG_SETMASK, NULL, &set) < 0) {
+ pa_log("sigprocmask(): %s", pa_cstrerror(errno));
+ return;
+ }
+#ifdef HAVE_PTHREAD
+ }
+#endif
+
+ if (sigismember(&set, sig))
+ return;
+
+ /* Check whether the signal is trapped */
+
+ if (sigaction(sig, NULL, &sa) < 0) {
+ pa_log("sigaction(): %s", pa_cstrerror(errno));
+ return;
+ }
+
+ if (sa.sa_handler != SIG_DFL)
+ return;
+
+ pa_log_warn("%s is not trapped. This might cause malfunction!", pa_sig2str(sig));
+#else /* HAVE_SIGACTION */
+ pa_log_warn("%s might not be trapped. This might cause malfunction!", pa_sig2str(sig));
+#endif
+}
+
+/* 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;
+ char *c = NULL;
+
+ pa_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);
+
+ c[size-1] = 0;
+
+ if (r > -1 && r < size)
+ return c;
+
+ if (r > -1) /* glibc 2.1 */
+ size = 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;
+ char *c = NULL;
+
+ pa_assert(format);
+
+ for(;;) {
+ int r;
+ va_list aq;
+
+ c = pa_xrealloc(c, size);
+
+ va_copy(aq, ap);
+ r = vsnprintf(c, size, format, aq);
+ va_end(aq);
+
+ c[size-1] = 0;
+
+ if (r > -1 && r < size)
+ return c;
+
+ if (r > -1) /* glibc 2.1 */
+ size = 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) {
+ pa_assert(b);
+ pa_assert(s);
+ pa_assert(l > 0);
+
+ strncpy(b, s, l);
+ b[l-1] = 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
+ struct sched_param sp;
+ int r, policy;
+
+ memset(&sp, 0, sizeof(sp));
+ policy = 0;
+
+ if ((r = pthread_getschedparam(pthread_self(), &policy, &sp)) != 0) {
+ pa_log("pthread_getschedgetparam(): %s", pa_cstrerror(r));
+ return -1;
+ }
+
+ if (policy == SCHED_FIFO && sp.sched_priority >= rtprio) {
+ pa_log_info("Thread already being scheduled with SCHED_FIFO with priority %i.", sp.sched_priority);
+ return 0;
+ }
+
+ sp.sched_priority = rtprio;
+ if ((r = pthread_setschedparam(pthread_self(), SCHED_FIFO, &sp)) != 0) {
+
+ while (sp.sched_priority > 1) {
+ sp.sched_priority --;
+
+ 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;
+ }
+ }
+
+ pa_log_warn("pthread_setschedparam(): %s", pa_cstrerror(r));
+ return -1;
+ }
+
+ pa_log_info("Successfully enabled SCHED_FIFO scheduling for thread, with priority %i.", sp.sched_priority);
+ return 0;
+#else
+ return -1;
+#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) {
+
+ if (geteuid() == 0)
+ return TRUE;
+
+#if defined(HAVE_SYS_RESOURCE_H) && defined(RLIMIT_RTPRIO)
+ {
+ struct rlimit rl;
+
+ if (getrlimit(RLIMIT_RTPRIO, &rl) >= 0)
+ if (rl.rlim_cur > 0 || rl.rlim_cur == RLIM_INFINITY)
+ return TRUE;
+ }
+#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;
+
+ if (cap_get_flag(cap, CAP_SYS_NICE, CAP_EFFECTIVE, &flag) >= 0)
+ if (flag == CAP_SET) {
+ cap_free(cap);
+ return TRUE;
+ }
+
+ cap_free(cap);
+ }
+ }
+#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;
+
+#if defined(HAVE_SYS_RESOURCE_H) && defined(RLIMIT_RTPRIO)
+ {
+ struct rlimit rl;
+
+ if (getrlimit(RLIMIT_NICE, &rl) >= 0)
+ if (rl.rlim_cur >= 21 || rl.rlim_cur == RLIM_INFINITY)
+ return TRUE;
+ }
+#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;
+
+ if (cap_get_flag(cap, CAP_SYS_NICE, CAP_EFFECTIVE, &flag) >= 0)
+ if (flag == CAP_SET) {
+ cap_free(cap);
+ return TRUE;
+ }
+
+ cap_free(cap);
+ }
+ }
+#endif
+
+ return FALSE;
+}
+
+/* Raise the priority of the current process as much as possible that
+ * is <= the specified nice level..*/
+int pa_raise_priority(int nice_level) {
+
+#ifdef HAVE_SYS_RESOURCE_H
+ if (setpriority(PRIO_PROCESS, 0, nice_level) < 0) {
+ int n;
+
+ for (n = nice_level+1; n < 0; n++) {
+
+ 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;
+ }
+ }
+
+ pa_log_warn("setpriority(): %s", pa_cstrerror(errno));
+ return -1;
+ }
+
+ pa_log_info("Successfully gained nice level %i.", nice_level);
+#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.");
+ }
+#endif
+
+ return 0;
+}
+
+/* Reset the priority to normal, inverting the changes made by
+ * pa_raise_priority() and pa_make_realtime()*/
+void pa_reset_priority(void) {
+#ifdef HAVE_SYS_RESOURCE_H
+ struct sched_param sp;
+
+ setpriority(PRIO_PROCESS, 0, 0);
+
+ memset(&sp, 0, sizeof(sp));
+ pa_assert_se(pthread_setschedparam(pthread_self(), SCHED_OTHER, &sp) == 0);
+#endif
+
+#ifdef OS_IS_WIN32
+ SetPriorityClass(GetCurrentProcess(), NORMAL_PRIORITY_CLASS);
+#endif
+}
+
+/* Try to parse a boolean string value.*/
+int pa_parse_boolean(const char *v) {
+ pa_assert(v);
+
+ 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;
+
+ return -1;
+}
+
+/* Split the specified string wherever one of the strings in delimiter
+ * occurs. Each time it is called returns a newly allocated string
+ * with pa_xmalloc(). The variable state points to, should be
+ * initiallized to NULL before the first call. */
+char *pa_split(const char *c, const char *delimiter, const char**state) {
+ const char *current = *state ? *state : c;
+ size_t l;
+
+ if (!*current)
+ return NULL;
+
+ l = strcspn(current, delimiter);
+ *state = current+l;
+
+ if (**state)
+ (*state)++;
+
+ 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;
+ size_t l;
+
+ if (!*current || *c == 0)
+ return NULL;
+
+ current += strspn(current, WHITESPACE);
+ l = strcspn(current, WHITESPACE);
+
+ *state = current+l;
+
+ return pa_xstrndup(current, l);
+}
+
+PA_STATIC_TLS_DECLARE(signame, pa_xfree);
+
+/* Return the name of an UNIX signal. Similar to Solaris sig2str() */
+const char *pa_sig2str(int sig) {
+ char *t;
+
+ if (sig <= 0)
+ goto fail;
+
+#ifdef NSIG
+ if (sig >= NSIG)
+ goto fail;
+#endif
+
+#ifdef HAVE_SIG2STR
+ {
+ char buf[SIG2STR_MAX];
+
+ if (sig2str(sig, buf) == 0) {
+ pa_xfree(PA_STATIC_TLS_GET(signame));
+ t = pa_sprintf_malloc("SIG%s", buf);
+ PA_STATIC_TLS_SET(signame, t);
+ return t;
+ }
+ }
+#else
+
+ switch(sig) {
+#ifdef SIGHUP
+ case SIGHUP: return "SIGHUP";
+#endif
+ case SIGINT: return "SIGINT";
+#ifdef SIGQUIT
+ case SIGQUIT: return "SIGQUIT";
+#endif
+ case SIGILL: return "SIGULL";
+#ifdef SIGTRAP
+ case SIGTRAP: return "SIGTRAP";
+#endif
+ case SIGABRT: return "SIGABRT";
+#ifdef SIGBUS
+ case SIGBUS: return "SIGBUS";
+#endif
+ case SIGFPE: return "SIGFPE";
+#ifdef SIGKILL
+ case SIGKILL: return "SIGKILL";
+#endif
+#ifdef SIGUSR1
+ case SIGUSR1: return "SIGUSR1";
+#endif
+ case SIGSEGV: return "SIGSEGV";
+#ifdef SIGUSR2
+ case SIGUSR2: return "SIGUSR2";
+#endif
+#ifdef SIGPIPE
+ case SIGPIPE: return "SIGPIPE";
+#endif
+#ifdef SIGALRM
+ case SIGALRM: return "SIGALRM";
+#endif
+ case SIGTERM: return "SIGTERM";
+#ifdef SIGSTKFLT
+ case SIGSTKFLT: return "SIGSTKFLT";
+#endif
+#ifdef SIGCHLD
+ case SIGCHLD: return "SIGCHLD";
+#endif
+#ifdef SIGCONT
+ case SIGCONT: return "SIGCONT";
+#endif
+#ifdef SIGSTOP
+ case SIGSTOP: return "SIGSTOP";
+#endif
+#ifdef SIGTSTP
+ case SIGTSTP: return "SIGTSTP";
+#endif
+#ifdef SIGTTIN
+ case SIGTTIN: return "SIGTTIN";
+#endif
+#ifdef SIGTTOU
+ case SIGTTOU: return "SIGTTOU";
+#endif
+#ifdef SIGURG
+ case SIGURG: return "SIGURG";
+#endif
+#ifdef SIGXCPU
+ case SIGXCPU: return "SIGXCPU";
+#endif
+#ifdef SIGXFSZ
+ case SIGXFSZ: return "SIGXFSZ";
+#endif
+#ifdef SIGVTALRM
+ case SIGVTALRM: return "SIGVTALRM";
+#endif
+#ifdef SIGPROF
+ case SIGPROF: return "SIGPROF";
+#endif
+#ifdef SIGWINCH
+ case SIGWINCH: return "SIGWINCH";
+#endif
+#ifdef SIGIO
+ case SIGIO: return "SIGIO";
+#endif
+#ifdef SIGPWR
+ case SIGPWR: return "SIGPWR";
+#endif
+#ifdef SIGSYS
+ case SIGSYS: return "SIGSYS";
+#endif
+ }
+
+#ifdef SIGRTMIN
+ if (sig >= SIGRTMIN && sig <= SIGRTMAX) {
+ pa_xfree(PA_STATIC_TLS_GET(signame));
+ t = pa_sprintf_malloc("SIGRTMIN+%i", sig - SIGRTMIN);
+ PA_STATIC_TLS_SET(signame, t);
+ return t;
+ }
+#endif
+
+#endif
+
+fail:
+
+ pa_xfree(PA_STATIC_TLS_GET(signame));
+ t = pa_sprintf_malloc("SIG%i", sig);
+ PA_STATIC_TLS_SET(signame, t);
+ return t;
+}
+
+#ifdef HAVE_GRP_H
+
+/* 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;
+ 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;
+ }
+
+ r = strcmp(name, result->gr_name) == 0;
+
+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;
+
+finish:
+#endif
+
+ 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;
+
+ pa_assert(n > 0);
+
+ gids = pa_xmalloc(sizeof(GETGROUPS_T)*n);
+
+ if ((n = getgroups(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) {
+ *gid = gids[i];
+ r = 1;
+ goto finish;
+ }
+ }
+
+ if (is_group(tgid = getgid(), name) > 0) {
+ *gid = tgid;
+ r = 1;
+ goto finish;
+ }
+
+ r = 0;
+
+finish:
+
+ pa_xfree(gids);
+ return r;
+}
+
+/* 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;
+ 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)
+ goto finish;
+
+ r = 0;
+ for (i = gr->gr_mem; *i; i++) {
+ struct passwd pwbuf, *pw;
+
+ if (getpwnam_r(*i, &pwbuf, p_buf, (size_t) p_n, &pw) != 0 || !pw)
+ continue;
+
+ if (pw->pw_uid == uid) {
+ r = 1;
+ break;
+ }
+ }
+
+finish:
+ pa_xfree(g_buf);
+ pa_xfree(p_buf);
+
+ 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;
+
+ 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)
+ goto finish;
+
+ ret = gr->gr_gid;
+
+finish:
+ pa_xfree(g_buf);
+ return ret;
+}
+
+int pa_check_in_group(gid_t g) {
+ gid_t gids[NGROUPS_MAX];
+ int r;
+
+ if ((r = getgroups(NGROUPS_MAX, gids)) < 0)
+ return -1;
+
+ for (; r > 0; r--)
+ if (gids[r-1] == g)
+ return 1;
+
+ return 0;
+}
+
+#else /* HAVE_GRP_H */
+
+int pa_own_uid_in_group(const char *name, gid_t *gid) {
+ return -1;
+
+}
+
+int pa_uid_in_group(uid_t uid, const char *name) {
+ return -1;
+}
+
+gid_t pa_get_gid_of_group(const char *name) {
+ return (gid_t) -1;
+}
+
+int pa_check_in_group(gid_t g) {
+ return -1;
+}
+
+#endif
+
+/* Lock or unlock a file entirely.
+ (advisory on UNIX, mandatory on Windows) */
+int pa_lock_fd(int fd, int b) {
+#ifdef F_SETLKW
+ struct flock flock;
+
+ /* 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;
+
+ if (fcntl(fd, F_SETLKW, &flock) >= 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)
+ return 0;
+ }
+
+ pa_log("%slock: %s", !b? "un" : "", pa_cstrerror(errno));
+#endif
+
+#ifdef OS_IS_WIN32
+ HANDLE h = (HANDLE)_get_osfhandle(fd);
+
+ if (b && LockFile(h, 0, 0, 0xFFFFFFFF, 0xFFFFFFFF))
+ return 0;
+ if (!b && UnlockFile(h, 0, 0, 0xFFFFFFFF, 0xFFFFFFFF))
+ return 0;
+
+ pa_log("%slock failed: 0x%08X", !b ? "un" : "", GetLastError());
+#endif
+
+ return -1;
+}
+
+/* Remove trailing newlines from a string */
+char* pa_strip_nl(char *s) {
+ pa_assert(s);
+
+ s[strcspn(s, "\r\n")] = 0;
+ return s;
+}
+
+/* Create a temporary lock file and lock it. */
+int pa_lock_lockfile(const char *fn) {
+ int fd = -1;
+ pa_assert(fn);
+
+ for (;;) {
+ struct stat st;
+
+ if ((fd = open(fn, O_CREAT|O_RDWR
+#ifdef O_NOCTTY
+ |O_NOCTTY
+#endif
+#ifdef O_NOFOLLOW
+ |O_NOFOLLOW
+#endif
+ , S_IRUSR|S_IWUSR)) < 0) {
+ pa_log_warn("Failed to create lock file '%s': %s", fn, pa_cstrerror(errno));
+ goto fail;
+ }
+
+ if (pa_lock_fd(fd, 1) < 0) {
+ pa_log_warn("Failed to lock file '%s'.", fn);
+ goto fail;
+ }
+
+ if (fstat(fd, &st) < 0) {
+ pa_log_warn("Failed to fstat() file '%s': %s", fn, pa_cstrerror(errno));
+ goto fail;
+ }
+
+ /* Check wheter the file has been removed meanwhile. When yes,
+ * restart this loop, otherwise, we're done */
+ if (st.st_nlink >= 1)
+ break;
+
+ if (pa_lock_fd(fd, 0) < 0) {
+ pa_log_warn("Failed to unlock file '%s'.", fn);
+ goto fail;
+ }
+
+ if (pa_close(fd) < 0) {
+ pa_log_warn("Failed to close file '%s': %s", fn, pa_cstrerror(errno));
+ fd = -1;
+ goto fail;
+ }
+
+ fd = -1;
+ }
+
+ return fd;
+
+fail:
+
+ if (fd >= 0)
+ pa_close(fd);
+
+ return -1;
+}
+
+/* Unlock a temporary lcok file */
+int pa_unlock_lockfile(const char *fn, int fd) {
+ int r = 0;
+ pa_assert(fd >= 0);
+
+ if (fn) {
+ if (unlink(fn) < 0) {
+ pa_log_warn("Unable to remove lock file '%s': %s", fn, pa_cstrerror(errno));
+ r = -1;
+ }
+ }
+
+ if (pa_lock_fd(fd, 0) < 0) {
+ pa_log_warn("Failed to unlock file '%s'.", fn);
+ r = -1;
+ }
+
+ if (pa_close(fd) < 0) {
+ pa_log_warn("Failed to close '%s': %s", fn, pa_cstrerror(errno));
+ r = -1;
+ }
+
+ return r;
+}
+
+static char *get_dir(mode_t m, const char *env_name) {
+ const char *e;
+ char *d;
+
+ if ((e = getenv(env_name)))
+ d = pa_xstrdup(e);
+ else {
+ char h[PATH_MAX];
+ struct stat st;
+
+ 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));
+ return NULL;
+ }
+
+ if (st.st_uid != getuid()) {
+ pa_log_error("Home directory %s not ours.", d);
+ return NULL;
+ }
+
+ d = pa_sprintf_malloc("%s" PA_PATH_SEP ".pulse", h);
+ }
+
+ if (pa_make_secure_dir(d, m, (pid_t) -1, (pid_t) -1) < 0) {
+ pa_log_error("Failed to create secure directory: %s", pa_cstrerror(errno));
+ 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_state_dir(void) {
+ return get_dir(0700, "PULSE_STATE_PATH");
+}
+
+/* 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))
+ return NULL;
+ fn = buf;
+#endif
+
+ if ((f = fopen(fn, "r"))) {
+ if (result)
+ *result = pa_xstrdup(fn);
+
+ return f;
+ }
+
+ pa_log_warn("Failed to open configuration file '%s': %s", fn, pa_cstrerror(errno));
+ return NULL;
+ }
+
+ if (local) {
+ const char *e;
+ char *lfn;
+ char h[PATH_MAX];
+ 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)))
+ fn = lfn = pa_sprintf_malloc("%s" PA_PATH_SEP ".pulse" PA_PATH_SEP "%s", h, local);
+
+#ifdef OS_IS_WIN32
+ if (!ExpandEnvironmentStrings(lfn, buf, PATH_MAX)) {
+ pa_xfree(lfn);
+ return NULL;
+ }
+ fn = buf;
+#endif
+
+ if ((f = fopen(fn, "r"))) {
+ if (result)
+ *result = pa_xstrdup(fn);
+
+ pa_xfree(lfn);
+ return f;
+ }
+
+ if (errno != ENOENT) {
+ pa_log_warn("Failed to open configuration file '%s': %s", fn, pa_cstrerror(errno));
+ pa_xfree(lfn);
+ return NULL;
+ }
+
+ pa_xfree(lfn);
+ }
+
+ if (global) {
+ FILE *f;
+
+#ifdef OS_IS_WIN32
+ if (!ExpandEnvironmentStrings(global, buf, PATH_MAX))
+ return NULL;
+ global = buf;
+#endif
+
+ if ((f = fopen(global, "r"))) {
+
+ if (result)
+ *result = pa_xstrdup(global);
+
+ return f;
+ }
+ } else
+ errno = ENOENT;
+
+ return NULL;
+}
+
+char *pa_find_config_file(const char *global, const char *local, const char *env) {
+ 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))) {
+#ifdef OS_IS_WIN32
+ if (!ExpandEnvironmentStrings(fn, buf, PATH_MAX))
+ return NULL;
+ fn = buf;
+#endif
+
+ if (access(fn, R_OK) == 0)
+ return pa_xstrdup(fn);
+
+ pa_log_warn("Failed to access configuration file '%s': %s", fn, pa_cstrerror(errno));
+ return NULL;
+ }
+
+ if (local) {
+ const char *e;
+ char *lfn;
+ char h[PATH_MAX];
+
+ 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)))
+ fn = lfn = pa_sprintf_malloc("%s" PA_PATH_SEP ".pulse" PA_PATH_SEP "%s", h, local);
+
+#ifdef OS_IS_WIN32
+ if (!ExpandEnvironmentStrings(lfn, buf, PATH_MAX)) {
+ pa_xfree(lfn);
+ return NULL;
+ }
+ fn = buf;
+#endif
+
+ if (access(fn, R_OK) == 0) {
+ char *r = pa_xstrdup(fn);
+ pa_xfree(lfn);
+ return r;
+ }
+
+ if (errno != ENOENT) {
+ pa_log_warn("Failed to access configuration file '%s': %s", fn, pa_cstrerror(errno));
+ pa_xfree(lfn);
+ return NULL;
+ }
+
+ pa_xfree(lfn);
+ }
+
+ if (global) {
+#ifdef OS_IS_WIN32
+ if (!ExpandEnvironmentStrings(global, buf, PATH_MAX))
+ return NULL;
+ global = buf;
+#endif
+
+ if (access(fn, R_OK) == 0)
+ return pa_xstrdup(global);
+ } else
+ errno = ENOENT;
+
+ return NULL;
+}
+
+/* Format the specified data as a hexademical string */
+char *pa_hexstr(const uint8_t* d, size_t dlength, char *s, size_t slength) {
+ size_t i = 0, j = 0;
+ const char hex[] = "0123456789abcdef";
+
+ pa_assert(d);
+ pa_assert(s);
+ pa_assert(slength > 0);
+
+ while (i < dlength && j+3 <= slength) {
+ s[j++] = hex[*d >> 4];
+ s[j++] = hex[*d & 0xF];
+
+ d++;
+ i++;
+ }
+
+ s[j < slength ? j : slength] = 0;
+ return s;
+}
+
+/* Convert a hexadecimal digit to a number or -1 if invalid */
+static int hexc(char c) {
+ if (c >= '0' && c <= '9')
+ return c - '0';
+
+ if (c >= 'A' && c <= 'F')
+ return c - 'A' + 10;
+
+ if (c >= 'a' && c <= 'f')
+ return c - 'a' + 10;
+
+ return -1;
+}
+
+/* Parse a hexadecimal string as created by pa_hexstr() to a BLOB */
+size_t pa_parsehex(const char *p, uint8_t *d, size_t dlength) {
+ size_t j = 0;
+
+ pa_assert(p);
+ pa_assert(d);
+
+ while (j < dlength && *p) {
+ int b;
+
+ if ((b = hexc(*(p++))) < 0)
+ return (size_t) -1;
+
+ d[j] = (uint8_t) (b << 4);
+
+ if (!*p)
+ return (size_t) -1;
+
+ if ((b = hexc(*(p++))) < 0)
+ return (size_t) -1;
+
+ d[j] |= (uint8_t) b;
+ j++;
+ }
+
+ return j;
+}
+
+/* Returns nonzero when *s starts with *pfx */
+pa_bool_t pa_startswith(const char *s, const char *pfx) {
+ size_t l;
+
+ pa_assert(s);
+ pa_assert(pfx);
+
+ l = strlen(pfx);
+
+ return strlen(s) >= l && strncmp(s, pfx, l) == 0;
+}
+
+/* Returns nonzero when *s ends with *sfx */
+pa_bool_t pa_endswith(const char *s, const char *sfx) {
+ size_t l1, l2;
+
+ pa_assert(s);
+ pa_assert(sfx);
+
+ l1 = strlen(s);
+ l2 = strlen(sfx);
+
+ return l1 >= l2 && strcmp(s+l1-l2, sfx) == 0;
+}
+
+pa_bool_t pa_is_path_absolute(const char *fn) {
+ pa_assert(fn);
+
+#ifndef OS_IS_WIN32
+ return *fn == '/';
+#else
+ return strlen(fn) >= 3 && isalpha(fn[0]) && fn[1] == ':' && fn[2] == '\\';
+#endif
+}
+
+char *pa_make_path_absolute(const char *p) {
+ char *r;
+ char *cwd;
+
+ pa_assert(p);
+
+ if (pa_is_path_absolute(p))
+ return pa_xstrdup(p);
+
+ if (!(cwd = pa_getcwd()))
+ return pa_xstrdup(p);
+
+ r = pa_sprintf_malloc("%s" PA_PATH_SEP "%s", cwd, p);
+ pa_xfree(cwd);
+ return r;
+}
+
+/* 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) {
+ 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);
+ pa_xfree(rtp);
+ return r;
+ } else
+ return rtp;
+}
+
+char *pa_runtime_path(const char *fn) {
+ return get_path(fn, 1);
+}
+
+char *pa_state_path(const char *fn) {
+ return get_path(fn, 0);
+}
+
+/* Convert the string s to a signed integer in *ret_i */
+int pa_atoi(const char *s, int32_t *ret_i) {
+ char *x = NULL;
+ long l;
+
+ pa_assert(s);
+ pa_assert(ret_i);
+
+ errno = 0;
+ l = strtol(s, &x, 0);
+
+ if (!x || *x || errno != 0)
+ return -1;
+
+ if ((int32_t) l != l)
+ return -1;
+
+ *ret_i = (int32_t) l;
+
+ return 0;
+}
+
+/* Convert the string s to an unsigned integer in *ret_u */
+int pa_atou(const char *s, uint32_t *ret_u) {
+ char *x = NULL;
+ unsigned long l;
+
+ pa_assert(s);
+ pa_assert(ret_u);
+
+ errno = 0;
+ l = strtoul(s, &x, 0);
+
+ if (!x || *x || errno != 0)
+ return -1;
+
+ if ((uint32_t) l != l)
+ return -1;
+
+ *ret_u = (uint32_t) l;
+
+ return 0;
+}
+
+#ifdef HAVE_STRTOF_L
+static locale_t c_locale = NULL;
+
+static void c_locale_destroy(void) {
+ freelocale(c_locale);
+}
+#endif
+
+int pa_atod(const char *s, double *ret_d) {
+ char *x = NULL;
+ double f;
+ int r = 0;
+
+ pa_assert(s);
+ pa_assert(ret_d);
+
+ /* This should be locale independent */
+
+#ifdef HAVE_STRTOF_L
+
+ PA_ONCE_BEGIN {
+
+ if ((c_locale = newlocale(LC_ALL_MASK, "C", NULL)))
+ atexit(c_locale_destroy);
+
+ } PA_ONCE_END;
+
+ if (c_locale) {
+ errno = 0;
+ f = strtod_l(s, &x, c_locale);
+ } else
+#endif
+ {
+ errno = 0;
+ f = strtod(s, &x);
+ }
+
+ if (!x || *x || errno != 0)
+ r = -1;
+ else
+ *ret_d = f;
+
+ return r;
+}
+
+/* Same as snprintf, but guarantees NUL-termination on every platform */
+int pa_snprintf(char *str, size_t size, const char *format, ...) {
+ int ret;
+ va_list ap;
+
+ pa_assert(str);
+ pa_assert(size > 0);
+ pa_assert(format);
+
+ va_start(ap, format);
+ ret = pa_vsnprintf(str, size, format, ap);
+ va_end(ap);
+
+ return ret;
+}
+
+/* Same as vsnprintf, but guarantees NUL-termination on every platform */
+int pa_vsnprintf(char *str, size_t size, const char *format, va_list ap) {
+ int ret;
+
+ pa_assert(str);
+ pa_assert(size > 0);
+ pa_assert(format);
+
+ ret = vsnprintf(str, size, format, ap);
+
+ str[size-1] = 0;
+
+ if (ret < 0)
+ ret = strlen(str);
+
+ return PA_MIN((int) size-1, ret);
+}
+
+/* Truncate the specified string, but guarantee that the string
+ * returned still validates as UTF8 */
+char *pa_truncate_utf8(char *c, size_t l) {
+ pa_assert(c);
+ pa_assert(pa_utf8_valid(c));
+
+ if (strlen(c) <= l)
+ return c;
+
+ c[l] = 0;
+
+ while (l > 0 && !pa_utf8_valid(c))
+ c[--l] = 0;
+
+ return c;
+}
+
+char *pa_getcwd(void) {
+ size_t l = 128;
+
+ for (;;) {
+ char *p = pa_xnew(char, l);
+ if (getcwd(p, l))
+ return p;
+
+ if (errno != ERANGE)
+ return NULL;
+
+ pa_xfree(p);
+ l *= 2;
+ }
+}
+
+void *pa_will_need(const void *p, size_t l) {
+#ifdef RLIMIT_MEMLOCK
+ struct rlimit rlim;
+#endif
+ const void *a;
+ size_t size;
+ int r;
+ size_t bs;
+
+ pa_assert(p);
+ pa_assert(l > 0);
+
+ a = PA_PAGE_ALIGN_PTR(p);
+ size = (const uint8_t*) p + l - (const uint8_t*) a;
+
+#ifdef HAVE_POSIX_MADVISE
+ if ((r = posix_madvise((void*) a, size, POSIX_MADV_WILLNEED)) == 0) {
+ pa_log_debug("posix_madvise() worked fine!");
+ return (void*) p;
+ }
+#endif
+
+ /* Most likely the memory was not mmap()ed from a file and thus
+ * madvise() didn't work, so let's misuse mlock() do page this
+ * stuff back into RAM. Yeah, let's fuck with the MM! It's so
+ * inviting, the man page of mlock() tells us: "All pages that
+ * contain a part of the specified address range are guaranteed to
+ * be resident in RAM when the call returns successfully." */
+
+#ifdef RLIMIT_MEMLOCK
+ pa_assert_se(getrlimit(RLIMIT_MEMLOCK, &rlim) == 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));
+ return (void*) p;
+ }
+
+ bs = PA_PAGE_ALIGN(rlim.rlim_cur);
+#else
+ bs = PA_PAGE_SIZE*4;
+#endif
+
+ pa_log_debug("posix_madvise() failed (or doesn't exist), trying mlock(): %s", pa_cstrerror(r));
+
+#ifdef HAVE_MLOCK
+ while (size > 0 && bs > 0) {
+
+ if (bs > size)
+ bs = size;
+
+ if (mlock(a, bs) < 0) {
+ bs = PA_PAGE_ALIGN(bs / 2);
+ continue;
+ }
+
+ pa_assert_se(munlock(a, bs) == 0);
+
+ a = (const uint8_t*) a + bs;
+ size -= bs;
+ }
+#endif
+
+ if (bs <= 0)
+ pa_log_debug("mlock() failed too (or doesn't exist), giving up: %s", pa_cstrerror(errno));
+ else
+ pa_log_debug("mlock() worked fine!");
+
+ return (void*) p;
+}
+
+void pa_close_pipe(int fds[2]) {
+ pa_assert(fds);
+
+ if (fds[0] >= 0)
+ pa_assert_se(pa_close(fds[0]) == 0);
+
+ if (fds[1] >= 0)
+ pa_assert_se(pa_close(fds[1]) == 0);
+
+ fds[0] = fds[1] = -1;
+}
+
+char *pa_readlink(const char *p) {
+ size_t l = 100;
+
+ for (;;) {
+ char *c;
+ ssize_t n;
+
+ c = pa_xnew(char, l);
+
+ if ((n = readlink(p, c, l-1)) < 0) {
+ pa_xfree(c);
+ return NULL;
+ }
+
+ if ((size_t) n < l-1) {
+ c[n] = 0;
+ return c;
+ }
+
+ pa_xfree(c);
+ l *= 2;
+ }
+}
+
+int pa_close_all(int except_fd, ...) {
+ va_list ap;
+ int n = 0, i, r;
+ int *p;
+
+ va_start(ap, except_fd);
+
+ if (except_fd >= 0)
+ for (n = 1; va_arg(ap, int) >= 0; n++)
+ ;
+
+ va_end(ap);
+
+ p = pa_xnew(int, n+1);
+
+ va_start(ap, except_fd);
+
+ i = 0;
+ if (except_fd >= 0) {
+ int fd;
+ p[i++] = except_fd;
+
+ while ((fd = va_arg(ap, int)) >= 0)
+ p[i++] = fd;
+ }
+ p[i] = -1;
+
+ va_end(ap);
+
+ r = pa_close_allv(p);
+ free(p);
+
+ return r;
+}
+
+int pa_close_allv(const int except_fds[]) {
+ struct rlimit rl;
+ int fd;
+ int saved_errno;
+
+#ifdef __linux__
+
+ DIR *d;
+
+ if ((d = opendir("/proc/self/fd"))) {
+
+ struct dirent *de;
+
+ while ((de = readdir(d))) {
+ pa_bool_t found;
+ long l;
+ char *e = NULL;
+ int i;
+
+ if (de->d_name[0] == '.')
+ continue;
+
+ errno = 0;
+ l = strtol(de->d_name, &e, 10);
+ if (errno != 0 || !e || *e) {
+ closedir(d);
+ errno = EINVAL;
+ return -1;
+ }
+
+ fd = (int) l;
+
+ if ((long) fd != l) {
+ closedir(d);
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (fd < 3)
+ continue;
+
+ if (fd == dirfd(d))
+ continue;
+
+ found = FALSE;
+ for (i = 0; except_fds[i] >= 0; i++)
+ if (except_fds[i] == fd) {
+ found = TRUE;
+ break;
+ }
+
+ if (found)
+ continue;
+
+ if (pa_close(fd) < 0) {
+ saved_errno = errno;
+ closedir(d);
+ errno = saved_errno;
+
+ return -1;
+ }
+ }
+
+ closedir(d);
+ return 0;
+ }
+
+#endif
+
+ if (getrlimit(RLIMIT_NOFILE, &rl) < 0)
+ return -1;
+
+ for (fd = 0; fd < (int) rl.rlim_max; fd++) {
+ int i;
+
+ if (fd <= 3)
+ continue;
+
+ for (i = 0; except_fds[i] >= 0; i++)
+ if (except_fds[i] == fd)
+ continue;
+
+ if (close(fd) < 0 && errno != EBADF)
+ return -1;
+ }
+
+ return 0;
+}
+
+int pa_unblock_sigs(int except, ...) {
+ va_list ap;
+ int n = 0, i, r;
+ int *p;
+
+ va_start(ap, except);
+
+ if (except >= 1)
+ for (n = 1; va_arg(ap, int) >= 0; n++)
+ ;
+
+ va_end(ap);
+
+ p = pa_xnew(int, n+1);
+
+ va_start(ap, except);
+
+ i = 0;
+ if (except >= 1) {
+ int sig;
+ p[i++] = except;
+
+ while ((sig = va_arg(ap, int)) >= 0)
+ p[i++] = sig;
+ }
+ p[i] = -1;
+
+ va_end(ap);
+
+ r = pa_unblock_sigsv(p);
+ pa_xfree(p);
+
+ return r;
+}
+
+int pa_unblock_sigsv(const int except[]) {
+ int i;
+ sigset_t ss;
+
+ if (sigemptyset(&ss) < 0)
+ return -1;
+
+ for (i = 0; except[i] > 0; i++)
+ if (sigaddset(&ss, except[i]) < 0)
+ return -1;
+
+ return sigprocmask(SIG_SETMASK, &ss, NULL);
+}
+
+int pa_reset_sigs(int except, ...) {
+ va_list ap;
+ int n = 0, i, r;
+ int *p;
+
+ va_start(ap, except);
+
+ if (except >= 1)
+ for (n = 1; va_arg(ap, int) >= 0; n++)
+ ;
+
+ va_end(ap);
+
+ p = pa_xnew(int, n+1);
+
+ va_start(ap, except);
+
+ i = 0;
+ if (except >= 1) {
+ p[i++] = except;
+
+ while ((p[i++] = va_arg(ap, int)) >= 0)
+ ;
+ }
+ p[i] = -1;
+
+ va_end(ap);
+
+ r = pa_reset_sigsv(p);
+ pa_xfree(p);
+
+ return r;
+}
+
+int pa_reset_sigsv(const int except[]) {
+ int sig;
+
+ for (sig = 1; sig < _NSIG; sig++) {
+ pa_bool_t reset = TRUE;
+
+ switch (sig) {
+ case SIGKILL:
+ case SIGSTOP:
+ reset = FALSE;
+ break;
+
+ default: {
+ int i;
+
+ for (i = 0; except[i] > 0; i++) {
+ if (sig == except[i]) {
+ reset = FALSE;
+ break;
+ }
+ }
+ }
+ }
+
+ if (reset) {
+ struct sigaction sa;
+
+ memset(&sa, 0, sizeof(sa));
+ sa.sa_handler = SIG_DFL;
+
+ /* On Linux the first two RT signals are reserved by
+ * glibc, and sigaction() will return EINVAL for them. */
+ if ((sigaction(sig, &sa, NULL) < 0))
+ if (errno != EINVAL)
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+void pa_set_env(const char *key, const char *value) {
+ pa_assert(key);
+ pa_assert(value);
+
+ putenv(pa_sprintf_malloc("%s=%s", key, value));
+}
+
+pa_bool_t pa_in_system_mode(void) {
+ const char *e;
+
+ if (!(e = getenv("PULSE_SYSTEM")))
+ return FALSE;
+
+ return !!atoi(e);
+}
generated by cgit (git 2.34.1) at 2025-07-13 03:58:44 +0000