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implement emulation of /dev/sndstat

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@954 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2006-05-23 23:57:50 +00:00
parent 23b123d361
commit 46fee46418
1 changed files with 102 additions and 15 deletions
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117
src/utils/padsp.c
View file

@ -771,11 +771,83 @@ static int mixer_open(int flags, int *_errno) {
}
static int sndstat_open(int flags, int *_errno) {
static const char sndstat[] =
"Sound Driver:3.8.1a-980706 (Polypaudio Virtual OSS)\n"
"Kernel: POSIX\n"
"Config options: 0\n"
"\n"
"Installed drivers:\n"
"Type 255: Polypaudio Virtual OSS\n"
"\n"
"Card config:\n"
"Polypaudio Virtual OSS\n"
"\n"
"Audio devices:\n"
"0: Polypaudio Virtual OSS\n"
"\n"
"Synth devices: NOT ENABLED IN CONFIG\n"
"\n"
"Midi devices:\n"
"\n"
"Timers:\n"
"\n"
"\Mixers:\n"
"0: Polypaudio Virtual OSS\n";
char fn[] = "/tmp/padsp-sndstat-XXXXXX";
mode_t u;
int fd = -1;
int e;
debug(__FILE__": sndstat_open()\n");
if (flags != O_RDONLY && flags != (O_RDONLY|O_LARGEFILE)) {
*_errno = EACCES;
debug(__FILE__": bad access!\n");
goto fail;
}
u = umask(0077);
fd = mkstemp(fn);
e = errno;
umask(u);
if (fd < 0) {
*_errno = e;
debug(__FILE__": mkstemp() failed: %s\n", strerror(errno));
goto fail;
}
unlink(fn);
if (write(fd, sndstat, sizeof(sndstat) -1) != sizeof(sndstat)-1) {
*_errno = errno;
debug(__FILE__": write() failed: %s\n", strerror(errno));
goto fail;
}
if (lseek(fd, SEEK_SET, 0) < 0) {
*_errno = errno;
debug(__FILE__": lseek() failed: %s\n", strerror(errno));
goto fail;
}
return fd;
fail:
if (fd >= 0)
close(fd);
return -1;
}
int open(const char *filename, int flags, ...) {
va_list args;
mode_t mode = 0;
int r, _errno = 0;
debug(__FILE__": open(%s)\n", filename);
va_start(args, flags);
if (flags & O_CREAT)
mode = va_arg(args, mode_t);
@ -786,12 +858,12 @@ int open(const char *filename, int flags, ...) {
return _open(filename, flags, mode);
}
debug(__FILE__": open()\n");
if (strcmp(filename, "/dev/dsp") == 0 || strcmp(filename, "/dev/adsp") == 0) {
r = dsp_open(flags, &_errno);
} else if (strcmp(filename, "/dev/mixer") == 0) {
r = mixer_open(flags, &_errno);
} else if (strcmp(filename, "/dev/sndstat") == 0) {
r = sndstat_open(flags, &_errno);
} else {
function_exit();
LOAD_OPEN_FUNC();
@ -1321,7 +1393,7 @@ int open64(const char *filename, int flags, ...) {
va_list args;
mode_t mode = 0;
debug(__FILE__": open64()\n");
debug(__FILE__": open64(%s)\n", filename);
va_start(args, flags);
if (flags & O_CREAT)
@ -1330,6 +1402,7 @@ int open64(const char *filename, int flags, ...) {
if (strcmp(filename, "/dev/dsp") != 0 &&
strcmp(filename, "/dev/adsp") != 0 &&
strcmp(filename, "/dev/sndstat") != 0 &&
strcmp(filename, "/dev/mixer") != 0) {
LOAD_OPEN64_FUNC();
return _open64(filename, flags, mode);
@ -1341,25 +1414,38 @@ int open64(const char *filename, int flags, ...) {
FILE* fopen(const char *filename, const char *mode) {
FILE *f = NULL;
int fd;
mode_t m;
debug(__FILE__": fopen(%s)\n", filename);
debug(__FILE__": fopen()\n");
if (strcmp(filename, "/dev/dsp") == 0 ||
strcmp(filename, "/dev/adsp") == 0) {
if (strcmp(filename, "/dev/dsp") != 0 &&
strcmp(filename, "/dev/adsp") != 0 &&
strcmp(filename, "/dev/mixer") != 0) {
if (strcmp(mode, "wb") != 0) {
errno = EACCES;
return NULL;
}
m = O_WRONLY;
} else if (strcmp(filename, "/dev/sndstat") == 0) {
if (strcmp(mode, "r") != 0) {
errno = EACCES;
return NULL;
}
m = O_RDONLY;
} else if (strcmp(filename, "/dev/mixer") != 0)
m = O_RDWR;
else {
LOAD_FOPEN_FUNC();
return _fopen(filename, mode);
}
if (strcmp(mode, "wb") != 0) {
errno = EACCES;
return NULL;
}
if ((fd = open(filename, O_WRONLY)) < 0)
if ((fd = open(filename, m)) < 0)
return NULL;
if (!(f = fdopen(fd, "wb"))) {
if (!(f = fdopen(fd, mode))) {
close(fd);
return NULL;
}
@ -1369,10 +1455,11 @@ FILE* fopen(const char *filename, const char *mode) {
FILE *fopen64(const char *filename, const char *mode) {
debug(__FILE__": fopen64()\n");
debug(__FILE__": fopen64(%s)\n", filename);
if (strcmp(filename, "/dev/dsp") != 0 &&
strcmp(filename, "/dev/adsp") != 0 &&
strcmp(filename, "/dev/sndstat") != 0 &&
strcmp(filename, "/dev/mixer") != 0) {
LOAD_FOPEN64_FUNC();
return _fopen64(filename, mode);