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MegaGlest/mk/linux/mojosetup/libfetch/common.c
Mark Vejvoda b69a6fe6ce Added Linux installer to mega-glest
2010-04-25 03:01:17 +00:00

1115 lines
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/*-
* Copyright (c) 1998-2004 Dag-Erling Coïdan Smørgrav
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer
* in this position and unchanged.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#if __MOJOSETUP__
#include "mojosetup_libfetch.h"
#include <pthread.h>
#endif
#if !sun /* __MOJOSETUP__ Solaris support... */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libfetch/common.c,v 1.50 2005/02/16 12:46:46 des Exp $");
#endif
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/uio.h>
#include <netinet/in.h>
#include <errno.h>
#include <netdb.h>
#include <pwd.h>
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "fetch.h"
#include "common.h"
/*** Local data **************************************************************/
/*
* Error messages for resolver errors
*/
static struct fetcherr _netdb_errlist[] = {
#ifdef EAI_NODATA
{ EAI_NODATA, FETCH_RESOLV, "Host not found" },
#endif
{ EAI_AGAIN, FETCH_TEMP, "Transient resolver failure" },
{ EAI_FAIL, FETCH_RESOLV, "Non-recoverable resolver failure" },
{ EAI_NONAME, FETCH_RESOLV, "No address record" },
{ -1, FETCH_UNKNOWN, "Unknown resolver error" }
};
/* End-of-Line */
static const char ENDL[2] = "\r\n";
/*** Error-reporting functions ***********************************************/
/*
* Map error code to string
*/
static struct fetcherr *
_fetch_finderr(struct fetcherr *p, int e)
{
while (p->num != -1 && p->num != e)
p++;
return (p);
}
/*
* Set error code
*/
void
_fetch_seterr(struct fetcherr *p, int e)
{
p = _fetch_finderr(p, e);
fetchLastErrCode = p->cat;
snprintf(fetchLastErrString, MAXERRSTRING, "%s", p->string);
}
/*
* Set error code according to errno
*/
void
_fetch_syserr(void)
{
switch (errno) {
case 0:
fetchLastErrCode = FETCH_OK;
break;
case EPERM:
case EACCES:
case EROFS:
#if __MOJOSETUP__
#if FREEBSD
case EAUTH:
case ENEEDAUTH:
#endif
#endif
fetchLastErrCode = FETCH_AUTH;
break;
case ENOENT:
case EISDIR: /* XXX */
fetchLastErrCode = FETCH_UNAVAIL;
break;
case ENOMEM:
fetchLastErrCode = FETCH_MEMORY;
break;
case EBUSY:
case EAGAIN:
fetchLastErrCode = FETCH_TEMP;
break;
case EEXIST:
fetchLastErrCode = FETCH_EXISTS;
break;
case ENOSPC:
fetchLastErrCode = FETCH_FULL;
break;
case EADDRINUSE:
case EADDRNOTAVAIL:
case ENETDOWN:
case ENETUNREACH:
case ENETRESET:
case EHOSTUNREACH:
fetchLastErrCode = FETCH_NETWORK;
break;
case ECONNABORTED:
case ECONNRESET:
fetchLastErrCode = FETCH_ABORT;
break;
case ETIMEDOUT:
fetchLastErrCode = FETCH_TIMEOUT;
break;
case ECONNREFUSED:
case EHOSTDOWN:
fetchLastErrCode = FETCH_DOWN;
break;
default:
fetchLastErrCode = FETCH_UNKNOWN;
}
snprintf(fetchLastErrString, MAXERRSTRING, "%s", strerror(errno));
}
/*
* Emit status message
*/
void
_fetch_info(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
fputc('\n', stderr);
}
/*** Network-related utility functions ***************************************/
/*
* Return the default port for a scheme
*/
int
_fetch_default_port(const char *scheme)
{
struct servent *se;
if ((se = getservbyname(scheme, "tcp")) != NULL)
return (ntohs(se->s_port));
if (strcasecmp(scheme, SCHEME_FTP) == 0)
return (FTP_DEFAULT_PORT);
if (strcasecmp(scheme, SCHEME_HTTP) == 0)
return (HTTP_DEFAULT_PORT);
return (0);
}
/*
* Return the default proxy port for a scheme
*/
int
_fetch_default_proxy_port(const char *scheme)
{
if (strcasecmp(scheme, SCHEME_FTP) == 0)
return (FTP_DEFAULT_PROXY_PORT);
if (strcasecmp(scheme, SCHEME_HTTP) == 0)
return (HTTP_DEFAULT_PROXY_PORT);
return (0);
}
/*
* Create a connection for an existing descriptor.
*/
conn_t *
_fetch_reopen(int sd)
{
conn_t *conn;
/* allocate and fill connection structure */
if ((conn = calloc(1, sizeof(*conn))) == NULL)
return (NULL);
conn->sd = sd;
++conn->ref;
return (conn);
}
/*
* Bump a connection's reference count.
*/
conn_t *
_fetch_ref(conn_t *conn)
{
++conn->ref;
return (conn);
}
/*
* Bind a socket to a specific local address
*/
int
_fetch_bind(int sd, int af, const char *addr)
{
struct addrinfo hints, *res, *res0;
int err;
memset(&hints, 0, sizeof(hints));
hints.ai_family = af;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = 0;
if ((err = getaddrinfo(addr, NULL, &hints, &res0)) != 0)
return (-1);
for (res = res0; res; res = res->ai_next)
if (bind(sd, res->ai_addr, res->ai_addrlen) == 0)
return (0);
return (-1);
}
/*
* Establish a TCP connection to the specified port on the specified host.
*/
conn_t *
_fetch_connect(const char *host, int port, int af, int verbose)
{
conn_t *conn;
char pbuf[10];
const char *bindaddr;
struct addrinfo hints, *res, *res0;
int sd, err;
DEBUG(fprintf(stderr, "---> %s:%d\n", host, port));
if (verbose)
_fetch_info("looking up %s", host);
/* look up host name and set up socket address structure */
snprintf(pbuf, sizeof(pbuf), "%d", port);
memset(&hints, 0, sizeof(hints));
hints.ai_family = af;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = 0;
if ((err = getaddrinfo(host, pbuf, &hints, &res0)) != 0) {
_netdb_seterr(err);
return (NULL);
}
bindaddr = getenv("FETCH_BIND_ADDRESS");
if (verbose)
_fetch_info("connecting to %s:%d", host, port);
/* try to connect */
for (sd = -1, res = res0; res; sd = -1, res = res->ai_next) {
if ((sd = socket(res->ai_family, res->ai_socktype,
res->ai_protocol)) == -1)
continue;
if (bindaddr != NULL && *bindaddr != '\0' &&
_fetch_bind(sd, res->ai_family, bindaddr) != 0) {
_fetch_info("failed to bind to '%s'", bindaddr);
close(sd);
continue;
}
if (connect(sd, res->ai_addr, res->ai_addrlen) == 0)
break;
close(sd);
}
freeaddrinfo(res0);
if (sd == -1) {
_fetch_syserr();
return (NULL);
}
if ((conn = _fetch_reopen(sd)) == NULL) {
_fetch_syserr();
close(sd);
}
return (conn);
}
/*
* Enable SSL on a connection.
*/
int
_fetch_ssl(conn_t *conn, int verbose)
{
#ifdef WITH_SSL
/* Init the SSL library and context */
if (!SSL_library_init()){
fprintf(stderr, "SSL library init failed\n");
return (-1);
}
SSL_load_error_strings();
conn->ssl_meth = SSLv23_client_method();
conn->ssl_ctx = SSL_CTX_new(conn->ssl_meth);
SSL_CTX_set_mode(conn->ssl_ctx, SSL_MODE_AUTO_RETRY);
conn->ssl = SSL_new(conn->ssl_ctx);
if (conn->ssl == NULL){
fprintf(stderr, "SSL context creation failed\n");
return (-1);
}
SSL_set_fd(conn->ssl, conn->sd);
if (SSL_connect(conn->ssl) == -1){
ERR_print_errors_fp(stderr);
return (-1);
}
if (verbose) {
X509_NAME *name;
char *str;
fprintf(stderr, "SSL connection established using %s\n",
SSL_get_cipher(conn->ssl));
conn->ssl_cert = SSL_get_peer_certificate(conn->ssl);
name = X509_get_subject_name(conn->ssl_cert);
str = X509_NAME_oneline(name, 0, 0);
printf("Certificate subject: %s\n", str);
free(str);
name = X509_get_issuer_name(conn->ssl_cert);
str = X509_NAME_oneline(name, 0, 0);
printf("Certificate issuer: %s\n", str);
free(str);
}
return (0);
#else
(void)conn;
(void)verbose;
fprintf(stderr, "SSL support disabled\n");
return (-1);
#endif
}
/*
* Read a character from a connection w/ timeout
*/
ssize_t
_fetch_read(conn_t *conn, char *buf, size_t len)
{
struct timeval now, timeout, wait;
fd_set readfds;
ssize_t rlen, total;
int r;
if (fetchTimeout) {
FD_ZERO(&readfds);
gettimeofday(&timeout, NULL);
timeout.tv_sec += fetchTimeout;
}
total = 0;
while (len > 0) {
while (fetchTimeout && !FD_ISSET(conn->sd, &readfds)) {
FD_SET(conn->sd, &readfds);
gettimeofday(&now, NULL);
wait.tv_sec = timeout.tv_sec - now.tv_sec;
wait.tv_usec = timeout.tv_usec - now.tv_usec;
if (wait.tv_usec < 0) {
wait.tv_usec += 1000000;
wait.tv_sec--;
}
if (wait.tv_sec < 0) {
errno = ETIMEDOUT;
_fetch_syserr();
return (-1);
}
errno = 0;
r = select(conn->sd + 1, &readfds, NULL, NULL, &wait);
if (r == -1) {
if (errno == EINTR && fetchRestartCalls)
continue;
_fetch_syserr();
return (-1);
}
}
#ifdef WITH_SSL
if (conn->ssl != NULL)
rlen = SSL_read(conn->ssl, buf, len);
else
#endif
rlen = read(conn->sd, buf, len);
if (rlen == 0)
break;
if (rlen < 0) {
if (errno == EINTR && fetchRestartCalls)
continue;
return (-1);
}
len -= rlen;
buf += rlen;
total += rlen;
}
return (total);
}
/*
* Read a line of text from a connection w/ timeout
*/
#define MIN_BUF_SIZE 1024
int
_fetch_getln(conn_t *conn)
{
char *tmp;
size_t tmpsize;
ssize_t len;
char c;
if (conn->buf == NULL) {
if ((conn->buf = malloc(MIN_BUF_SIZE)) == NULL) {
errno = ENOMEM;
return (-1);
}
conn->bufsize = MIN_BUF_SIZE;
}
conn->buf[0] = '\0';
conn->buflen = 0;
do {
len = _fetch_read(conn, &c, 1);
if (len == -1)
return (-1);
if (len == 0)
break;
conn->buf[conn->buflen++] = c;
if (conn->buflen == conn->bufsize) {
tmp = conn->buf;
tmpsize = conn->bufsize * 2 + 1;
if ((tmp = realloc(tmp, tmpsize)) == NULL) {
errno = ENOMEM;
return (-1);
}
conn->buf = tmp;
conn->bufsize = tmpsize;
}
} while (c != '\n');
conn->buf[conn->buflen] = '\0';
DEBUG(fprintf(stderr, "<<< %s", conn->buf));
return (0);
}
/*
* Write to a connection w/ timeout
*/
ssize_t
_fetch_write(conn_t *conn, const char *buf, size_t len)
{
struct iovec iov;
iov.iov_base = __DECONST(char *, buf);
iov.iov_len = len;
return _fetch_writev(conn, &iov, 1);
}
/*
* Write a vector to a connection w/ timeout
* Note: can modify the iovec.
*/
ssize_t
_fetch_writev(conn_t *conn, struct iovec *iov, int iovcnt)
{
struct timeval now, timeout, wait;
fd_set writefds;
ssize_t wlen, total;
int r;
if (fetchTimeout) {
FD_ZERO(&writefds);
gettimeofday(&timeout, NULL);
timeout.tv_sec += fetchTimeout;
}
total = 0;
while (iovcnt > 0) {
while (fetchTimeout && !FD_ISSET(conn->sd, &writefds)) {
FD_SET(conn->sd, &writefds);
gettimeofday(&now, NULL);
wait.tv_sec = timeout.tv_sec - now.tv_sec;
wait.tv_usec = timeout.tv_usec - now.tv_usec;
if (wait.tv_usec < 0) {
wait.tv_usec += 1000000;
wait.tv_sec--;
}
if (wait.tv_sec < 0) {
errno = ETIMEDOUT;
_fetch_syserr();
return (-1);
}
errno = 0;
r = select(conn->sd + 1, NULL, &writefds, NULL, &wait);
if (r == -1) {
if (errno == EINTR && fetchRestartCalls)
continue;
return (-1);
}
}
errno = 0;
#ifdef WITH_SSL
if (conn->ssl != NULL)
wlen = SSL_write(conn->ssl,
iov->iov_base, iov->iov_len);
else
#endif
wlen = writev(conn->sd, iov, iovcnt);
if (wlen == 0) {
/* we consider a short write a failure */
errno = EPIPE;
_fetch_syserr();
return (-1);
}
if (wlen < 0) {
if (errno == EINTR && fetchRestartCalls)
continue;
return (-1);
}
total += wlen;
while (iovcnt > 0 && wlen >= (ssize_t)iov->iov_len) {
wlen -= iov->iov_len;
iov++;
iovcnt--;
}
if (iovcnt > 0) {
iov->iov_len -= wlen;
iov->iov_base = __DECONST(char *, iov->iov_base) + wlen;
}
}
return (total);
}
/*
* Write a line of text to a connection w/ timeout
*/
int
_fetch_putln(conn_t *conn, const char *str, size_t len)
{
struct iovec iov[2];
int ret;
DEBUG(fprintf(stderr, ">>> %s\n", str));
iov[0].iov_base = __DECONST(char *, str);
iov[0].iov_len = len;
iov[1].iov_base = __DECONST(char *, ENDL);
iov[1].iov_len = sizeof(ENDL);
if (len == 0)
ret = _fetch_writev(conn, &iov[1], 1);
else
ret = _fetch_writev(conn, iov, 2);
if (ret == -1)
return (-1);
return (0);
}
/*
* Close connection
*/
int
_fetch_close(conn_t *conn)
{
int ret;
if (--conn->ref > 0)
return (0);
ret = close(conn->sd);
free(conn->buf);
free(conn);
return (ret);
}
/*** Directory-related utility functions *************************************/
int
_fetch_add_entry(struct url_ent **p, int *size, int *len,
const char *name, struct url_stat *us)
{
struct url_ent *tmp;
if (*p == NULL) {
*size = 0;
*len = 0;
}
if (*len >= *size - 1) {
tmp = realloc(*p, (*size * 2 + 1) * sizeof(**p));
if (tmp == NULL) {
errno = ENOMEM;
_fetch_syserr();
return (-1);
}
*size = (*size * 2 + 1);
*p = tmp;
}
tmp = *p + *len;
snprintf(tmp->name, PATH_MAX, "%s", name);
#if __MOJOSETUP__
memmove(&tmp->stat, us, sizeof(*us));
#else
bcopy(us, &tmp->stat, sizeof(*us));
#endif
(*len)++;
(++tmp)->name[0] = 0;
return (0);
}
/*** Authentication-related utility functions ********************************/
static const char *
_fetch_read_word(FILE *f)
{
static char word[1024];
if (fscanf(f, " %1024s ", word) != 1)
return (NULL);
return (word);
}
/*
* Get authentication data for a URL from .netrc
*/
int
_fetch_netrc_auth(struct url *url)
{
char fn[PATH_MAX];
const char *word;
char *p;
FILE *f;
if ((p = getenv("NETRC")) != NULL) {
if (snprintf(fn, sizeof(fn), "%s", p) >= (int)sizeof(fn)) {
_fetch_info("$NETRC specifies a file name "
"longer than PATH_MAX");
return (-1);
}
} else {
if ((p = getenv("HOME")) != NULL) {
struct passwd *pwd;
if ((pwd = getpwuid(getuid())) == NULL ||
(p = pwd->pw_dir) == NULL)
return (-1);
}
if (snprintf(fn, sizeof(fn), "%s/.netrc", p) >= (int)sizeof(fn))
return (-1);
}
if ((f = fopen(fn, "r")) == NULL)
return (-1);
while ((word = _fetch_read_word(f)) != NULL) {
if (strcmp(word, "default") == 0) {
DEBUG(_fetch_info("Using default .netrc settings"));
break;
}
if (strcmp(word, "machine") == 0 &&
(word = _fetch_read_word(f)) != NULL &&
strcasecmp(word, url->host) == 0) {
DEBUG(_fetch_info("Using .netrc settings for %s", word));
break;
}
}
if (word == NULL)
goto ferr;
while ((word = _fetch_read_word(f)) != NULL) {
if (strcmp(word, "login") == 0) {
if ((word = _fetch_read_word(f)) == NULL)
goto ferr;
if (snprintf(url->user, sizeof(url->user),
"%s", word) > (int)sizeof(url->user)) {
_fetch_info("login name in .netrc is too long");
url->user[0] = '\0';
}
} else if (strcmp(word, "password") == 0) {
if ((word = _fetch_read_word(f)) == NULL)
goto ferr;
if (snprintf(url->pwd, sizeof(url->pwd),
"%s", word) > (int)sizeof(url->pwd)) {
_fetch_info("password in .netrc is too long");
url->pwd[0] = '\0';
}
} else if (strcmp(word, "account") == 0) {
if ((word = _fetch_read_word(f)) == NULL)
goto ferr;
/* XXX not supported! */
} else {
break;
}
}
fclose(f);
return (0);
ferr:
fclose(f);
return (-1);
}
#if __MOJOSETUP__
int MOJOSETUP_vasprintf(char **strp, const char *fmt, va_list ap)
{
int len = 0;
char dummy = 0;
va_list aq;
va_copy(aq, ap);
len = vsnprintf(&dummy, sizeof (dummy), fmt, aq);
va_end(aq);
*strp = (char *) xmalloc(len+1);
return vsnprintf(*strp, len+1, fmt, ap);
} // MOJOSETUP_vasprintf
int MOJOSETUP_asprintf(char **strp, const char *fmt, ...)
{
va_list ap;
int len = 0;
char dummy = 0;
va_start(ap, fmt);
len = vsnprintf(&dummy, sizeof (dummy), fmt, ap);
va_end(ap);
*strp = (char *) xmalloc(len+1);
va_start(ap, fmt);
len = vsnprintf(*strp, len+1, fmt, ap);
va_end(ap);
return len;
} // MOJOSETUP_asprintf
time_t timegm_portable(struct tm *tm)
{
char *envr = getenv("TZ");
time_t retval;
setenv("TZ", "", 1);
tzset();
retval = mktime(tm);
if (envr)
setenv("TZ", envr, 1);
else
unsetenv("TZ");
tzset();
return retval;
} // timegm_portable
boolean ishexnumber(char ch)
{
return ( ((ch >= '0') && (ch <= '9')) ||
((ch >= 'a') && (ch <= 'f')) ||
((ch >= 'A') && (ch <= 'F')) );
} // ishexnumber
// This is a workaround because libfetch is a pain to make non-blocking.
// The ring buffer code is from my OpenAL implementation:
// http://icculus.org/al_osx/
typedef struct
{
uint8 *buffer;
uint32 size;
uint32 write;
uint32 read;
uint32 used;
} MojoRing;
static MojoRing *MojoRing_new(uint32 size)
{
MojoRing *ring = (MojoRing *) xmalloc(sizeof (MojoRing));
ring->buffer = (uint8 *) xmalloc(size);
ring->size = size;
ring->write = 0;
ring->read = 0;
ring->used = 0;
return ring;
} // MojoRing_new
static void MojoRing_free(MojoRing *ring)
{
free(ring->buffer);
free(ring);
} // MojoRing_free
uint32 MojoRing_availableForGet(MojoRing *ring)
{
return(ring->used);
} // MojoRing_size
uint32 MojoRing_availableForPut(MojoRing *ring)
{
return ring->size - ring->used;
} // MojoRing_size
void MojoRing_put(MojoRing *ring, uint8 *data, uint32 size)
{
uint32 cpy;
uint32 avail;
if (!size) // just in case...
return;
// Putting more data than ring buffer holds in total? Replace it all.
if (size > ring->size)
{
ring->write = 0;
ring->read = 0;
ring->used = ring->size;
memcpy(ring->buffer, data + (size - ring->size), ring->size);
return;
} // if
// Buffer overflow? Push read pointer to oldest sample not overwritten...
avail = ring->size - ring->used;
if (size > avail)
{
ring->read += size - avail;
if (ring->read > ring->size)
ring->read -= ring->size;
} // if
// Clip to end of buffer and copy first block...
cpy = ring->size - ring->write;
if (size < cpy)
cpy = size;
if (cpy) memcpy(ring->buffer + ring->write, data, cpy);
// Wrap around to front of ring buffer and copy remaining data...
avail = size - cpy;
if (avail) memcpy(ring->buffer, data + cpy, avail);
// Update write pointer...
ring->write += size;
if (ring->write > ring->size)
ring->write -= ring->size;
ring->used += size;
if (ring->used > ring->size)
ring->used = ring->size;
} // MojoRing_put
uint32 MojoRing_get(MojoRing *ring, uint8 *data, uint32 size)
{
uint32 cpy;
uint32 avail = ring->used;
// Clamp amount to read to available data...
if (size > avail)
size = avail;
// Clip to end of buffer and copy first block...
cpy = ring->size - ring->read;
if (cpy > size) cpy = size;
if (cpy) memcpy(data, ring->buffer + ring->read, cpy);
// Wrap around to front of ring buffer and copy remaining data...
avail = size - cpy;
if (avail) memcpy(data + cpy, ring->buffer, avail);
// Update read pointer...
ring->read += size;
if (ring->read > ring->size)
ring->read -= ring->size;
ring->used -= size;
return(size); // may have been clamped if there wasn't enough data...
} // MojoRing_get
typedef struct
{
const char *url;
MojoRing *ring;
int64 bytes_read;
int64 length;
boolean error;
volatile boolean stop;
pthread_t tid;
pthread_mutex_t mutex;
} BlockingInfo;
static void *blocking_thread(void *data)
{
struct url_stat us;
uint8 buf[512];
BlockingInfo *info = (BlockingInfo *) data;
// !!! FIXME: This function can hang until the connect() or read() times
// !!! FIXME: out, without any way to stop it. ready() can deal with
// !!! FIXME: the blocking reads, but closing the socket has to wait
// !!! FIXME: for a pthread_join, and thus can block for a LONG time.
// !!! FIXME: This is only a problem if the user wants to cancel a
// !!! FIXME: download, but it needs to be addressed. Moving libfetch
// !!! FIXME: to non-blocking sockets will fix this and let me flush
// !!! FIXME: all this heroic coding, too.
MojoInput *io = fetchXGetURL(info->url, &us, "rbp");
if (io != NULL)
{
if (!info->stop)
info->length = io->length(io);
} // if
else
{
info->error = true;
info->stop = true;
} // else
while (!info->stop)
{
uint8 *ptr = buf;
int64 br = io->read(io, buf, sizeof (buf));
if (br < 0)
info->stop = info->error = true;
else if (br == 0)
info->stop = true;
else
{
while (br > 0)
{
uint32 avail;
pthread_mutex_lock(&info->mutex);
avail = MojoRing_availableForPut(info->ring);
if (avail > br)
avail = br;
if (avail)
MojoRing_put(info->ring, ptr, avail);
pthread_mutex_unlock(&info->mutex);
ptr += avail;
br -= avail;
if (br > 0)
MojoPlatform_sleep(10);
} // while
} // else
} // while
if (io != NULL)
io->close(io);
return NULL;
} // blocking_thread
static boolean MojoInput_blocking_ready(MojoInput *io)
{
boolean retval = false;
BlockingInfo *info = (BlockingInfo *) io->opaque;
if (pthread_mutex_lock(&info->mutex) == 0)
{
retval = ( (info->stop) || (info->error) ||
MojoRing_availableForGet(info->ring) );
pthread_mutex_unlock(&info->mutex);
} // if
return retval;
} // MojoInput_blocking_ready
static int64 MojoInput_blocking_read(MojoInput *io, void *buf, uint32 bufsize)
{
BlockingInfo *info = (BlockingInfo *) io->opaque;
uint32 avail = 0;
while (!io->ready(io))
MojoPlatform_sleep(100);
if (pthread_mutex_lock(&info->mutex) != 0)
{
info->stop = info->error = true; // oh well.
return -1;
} // if
avail = MojoRing_availableForGet(info->ring);
if (avail > 0)
{
if (avail > bufsize)
avail = bufsize;
MojoRing_get(info->ring, (uint8 *) buf, avail);
info->bytes_read += avail;
} // if
pthread_mutex_unlock(&info->mutex);
if (avail > 0)
return avail;
if (info->error)
return -1;
assert(info->stop);
return 0;
} // MojoInput_blocking_read
static boolean MojoInput_blocking_seek(MojoInput *io, uint64 pos)
{
return -1;
} // MojoInput_blocking_seek
static int64 MojoInput_blocking_tell(MojoInput *io)
{
BlockingInfo *info = (BlockingInfo *) io->opaque;
return info->bytes_read;
} // MojoInput_blocking_tell
static int64 MojoInput_blocking_length(MojoInput *io)
{
BlockingInfo *info = (BlockingInfo *) io->opaque;
return info->length;
} // MojoInput_blocking_length
static MojoInput* MojoInput_blocking_duplicate(MojoInput *io)
{
return NULL;
} // MojoInput_blocking_duplicate
static void MojoInput_blocking_free(MojoInput *io)
{
BlockingInfo *info = (BlockingInfo *) io->opaque;
MojoRing_free(info->ring);
pthread_mutex_destroy(&info->mutex);
free((void *) info->url);
free(info);
free(io);
} // MojoInput_blocking_free
static void MojoInput_blocking_close(MojoInput *io)
{
BlockingInfo *info = (BlockingInfo *) io->opaque;
info->stop = true;
pthread_join(info->tid, NULL);
MojoInput_blocking_free(io);
} // MojoInput_blocking_close
MojoInput *MojoInput_newFromURL(const char *url)
{
MojoInput *retval = NULL;
if (url != NULL)
{
BlockingInfo *info = (BlockingInfo *) xmalloc(sizeof (BlockingInfo));
info->url = xstrdup(url);
info->ring = MojoRing_new(512 * 1024);
info->length = -1;
retval = (MojoInput *) xmalloc(sizeof (MojoInput));
retval->ready = MojoInput_blocking_ready;
retval->read = MojoInput_blocking_read;
retval->seek = MojoInput_blocking_seek;
retval->tell = MojoInput_blocking_tell;
retval->length = MojoInput_blocking_length;
retval->duplicate = MojoInput_blocking_duplicate;
retval->close = MojoInput_blocking_close;
retval->opaque = info;
if ( (pthread_mutex_init(&info->mutex, NULL) != 0) ||
(pthread_create(&info->tid, NULL, blocking_thread, info) != 0) )
{
MojoInput_blocking_free(retval);
retval = NULL;
} // if
} // if
return retval;
} // MojoInput_newFromURL
#endif
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