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aptmethod.c
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/* This file is part of "reprepro"
* Copyright (C) 2004,2005,2007,2008,2009 Bernhard R. Link
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02111-1301 USA
*/
#include <config.h>
#include <errno.h>
#include <sys/select.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <assert.h>
#include <string.h>
#include <ctype.h>
#include "error.h"
#include "mprintf.h"
#include "strlist.h"
#include "names.h"
#include "dirs.h"
#include "chunks.h"
#include "checksums.h"
#include "files.h"
#include "uncompression.h"
#include "aptmethod.h"
#include "filecntl.h"
struct tobedone {
/*@null@*/
struct tobedone *next;
/* must be saved to know where is should be moved to: */
/*@notnull@*/
char *uri;
/*@notnull@*/
char *filename;
/* callback and its data: */
queue_callback *callback;
/*@null@*/void *privdata1, *privdata2;
/* there is no fallback or that was already used */
bool lasttry;
};
struct aptmethod {
/*@only@*/ /*@null@*/
struct aptmethod *next;
char *name;
char *baseuri;
/*@null@*/char *fallbackbaseuri;
/*@null@*/char *config;
int mstdin, mstdout;
pid_t child;
enum {
ams_notstarted=0,
ams_waitforcapabilities,
ams_ok,
ams_failed
} status;
/*@null@*/struct tobedone *tobedone;
/*@null@*//*@dependent@*/struct tobedone *lasttobedone;
/*@null@*//*@dependent@*/const struct tobedone *nexttosend;
/* what is currently read: */
/*@null@*/char *inputbuffer;
size_t input_size, alreadyread;
/* What is currently written: */
/*@null@*/char *command;
size_t alreadywritten, output_length;
};
struct aptmethodrun {
struct aptmethod *methods;
};
static void todo_free(/*@only@*/ struct tobedone *todo) {
free(todo->filename);
free(todo->uri);
free(todo);
}
static void free_todolist(/*@only@*/ struct tobedone *todo) {
while (todo != NULL) {
struct tobedone *h = todo->next;
todo_free(todo);
todo = h;
}
}
static void aptmethod_free(/*@only@*/struct aptmethod *method) {
if (method == NULL)
return;
free(method->name);
free(method->baseuri);
free(method->config);
free(method->fallbackbaseuri);
free(method->inputbuffer);
free(method->command);
free_todolist(method->tobedone);
free(method);
}
retvalue aptmethod_shutdown(struct aptmethodrun *run) {
retvalue result = RET_OK, r;
struct aptmethod *method, *lastmethod, **method_ptr;
/* first get rid of everything not running: */
method_ptr = &run->methods;
while (*method_ptr != NULL) {
if ((*method_ptr)->child > 0) {
if (verbose > 10)
fprintf(stderr,
"Still waiting for %d\n", (int)(*method_ptr)->child);
method_ptr = &(*method_ptr)->next;
continue;
} else {
/*@only@*/ struct aptmethod *h;
h = (*method_ptr);
*method_ptr = h->next;
h->next = NULL;
aptmethod_free(h);
}
}
/* finally get rid of all the processes: */
for (method = run->methods ; method != NULL ; method = method->next) {
if (method->mstdin >= 0) {
(void)close(method->mstdin);
if (verbose > 30)
fprintf(stderr, "Closing stdin of %d\n",
(int)method->child);
}
method->mstdin = -1;
if (method->mstdout >= 0) {
(void)close(method->mstdout);
if (verbose > 30)
fprintf(stderr, "Closing stdout of %d\n",
(int)method->child);
}
method->mstdout = -1;
}
while (run->methods != NULL || uncompress_running()) {
pid_t pid;int status;
pid = wait(&status);
lastmethod = NULL; method = run->methods;
while (method != NULL) {
if (method->child == pid) {
struct aptmethod *next = method->next;
if (lastmethod != NULL) {
lastmethod->next = next;
} else
run->methods = next;
aptmethod_free(method);
pid = -1;
break;
} else {
lastmethod = method;
method = method->next;
}
}
if (pid > 0) {
r = uncompress_checkpid(pid, status);
RET_UPDATE(result, r);
}
}
free(run);
return result;
}
/******************Initialize the data structures***********************/
retvalue aptmethod_initialize_run(struct aptmethodrun **run) {
struct aptmethodrun *r;
r = zNEW(struct aptmethodrun);
if (FAILEDTOALLOC(r))
return RET_ERROR_OOM;
*run = r;
return RET_OK;
}
retvalue aptmethod_newmethod(struct aptmethodrun *run, const char *uri, const char *fallbackuri, const struct strlist *config, struct aptmethod **m) {
struct aptmethod *method;
const char *p;
method = zNEW(struct aptmethod);
if (FAILEDTOALLOC(method))
return RET_ERROR_OOM;
method->mstdin = -1;
method->mstdout = -1;
method->child = -1;
method->status = ams_notstarted;
p = uri;
while (*p != '\0' && (*p == '_' || *p == '-' ||
(*p>='a' && *p<='z') || (*p>='A' && *p<='Z') ||
(*p>='0' && *p<='9'))) {
p++;
}
if (*p == '\0') {
fprintf(stderr, "No colon found in method-URI '%s'!\n", uri);
free(method);
return RET_ERROR;
}
if (*p != ':') {
fprintf(stderr,
"Unexpected character '%c' in method-URI '%s'!\n", *p, uri);
free(method);
return RET_ERROR;
}
if (p == uri) {
fprintf(stderr,
"Zero-length name in method-URI '%s'!\n", uri);
free(method);
return RET_ERROR;
}
method->name = strndup(uri, p-uri);
if (FAILEDTOALLOC(method->name)) {
free(method);
return RET_ERROR_OOM;
}
method->baseuri = strdup(uri);
if (FAILEDTOALLOC(method->baseuri)) {
free(method->name);
free(method);
return RET_ERROR_OOM;
}
if (fallbackuri == NULL)
method->fallbackbaseuri = NULL;
else {
method->fallbackbaseuri = strdup(fallbackuri);
if (FAILEDTOALLOC(method->fallbackbaseuri)) {
free(method->baseuri);
free(method->name);
free(method);
return RET_ERROR_OOM;
}
}
#define CONF601 "601 Configuration"
#define CONFITEM "\nConfig-Item: "
if (config->count == 0)
method->config = strdup(CONF601 CONFITEM "Dir=/" "\n\n");
else
method->config = strlist_concat(config,
CONF601 CONFITEM, CONFITEM, "\n\n");
if (FAILEDTOALLOC(method->config)) {
free(method->fallbackbaseuri);
free(method->baseuri);
free(method->name);
free(method);
return RET_ERROR_OOM;
}
method->next = run->methods;
run->methods = method;
*m = method;
return RET_OK;
}
/**************************Fire up a method*****************************/
inline static retvalue aptmethod_startup(struct aptmethod *method) {
pid_t f;
int mstdin[2];
int mstdout[2];
int r;
/* When there is nothing to get, there is no reason to startup
* the method. */
if (method->tobedone == NULL) {
return RET_NOTHING;
}
/* when we are already running, we are already ready...*/
if (method->child > 0) {
return RET_OK;
}
method->status = ams_waitforcapabilities;
r = pipe(mstdin);
if (r < 0) {
int e = errno;
fprintf(stderr, "Error %d creating pipe: %s\n",
e, strerror(e));
return RET_ERRNO(e);
}
r = pipe(mstdout);
if (r < 0) {
int e = errno;
(void)close(mstdin[0]); (void)close(mstdin[1]);
fprintf(stderr, "Error %d in pipe syscall: %s\n",
e, strerror(e));
return RET_ERRNO(e);
}
if (interrupted()) {
(void)close(mstdin[0]);(void)close(mstdin[1]);
(void)close(mstdout[0]);(void)close(mstdout[1]);
return RET_ERROR_INTERRUPTED;
}
f = fork();
if (f < 0) {
int e = errno;
(void)close(mstdin[0]); (void)close(mstdin[1]);
(void)close(mstdout[0]); (void)close(mstdout[1]);
fprintf(stderr, "Error %d forking: %s\n",
e, strerror(e));
return RET_ERRNO(e);
}
if (f == 0) {
char *methodname;
int e;
/* child: */
(void)close(mstdin[1]);
(void)close(mstdout[0]);
if (dup2(mstdin[0], 0) < 0) {
e = errno;
fprintf(stderr, "Error %d while setting stdin: %s\n",
e, strerror(e));
exit(255);
}
if (dup2(mstdout[1], 1) < 0) {
e = errno;
fprintf(stderr, "Error %d while setting stdout: %s\n",
e, strerror(e));
exit(255);
}
closefrom(3);
methodname = calc_dirconcat(global.methoddir, method->name);
if (FAILEDTOALLOC(methodname))
exit(255);
/* not really useful here, unless someone write reprepro
* specific modules (which I hope noone will) */
setenv("REPREPRO_BASE_DIR", global.basedir, true);
setenv("REPREPRO_OUT_DIR", global.outdir, true);
setenv("REPREPRO_CONF_DIR", global.confdir, true);
setenv("REPREPRO_DIST_DIR", global.distdir, true);
setenv("REPREPRO_LOG_DIR", global.logdir, true);
(void)execl(methodname, methodname, ENDOFARGUMENTS);
e = errno;
fprintf(stderr, "Error %d while executing '%s': %s\n",
e, methodname, strerror(e));
exit(255);
}
/* the main program continues... */
method->child = f;
if (verbose > 10)
fprintf(stderr,
"Method '%s' started as %d\n", method->baseuri, (int)f);
(void)close(mstdin[0]);
(void)close(mstdout[1]);
markcloseonexec(mstdin[1]);
markcloseonexec(mstdout[0]);
method->mstdin = mstdin[1];
method->mstdout = mstdout[0];
method->inputbuffer = NULL;
method->input_size = 0;
method->alreadyread = 0;
method->command = NULL;
method->output_length = 0;
method->alreadywritten = 0;
return RET_OK;
}
/**************************how to add files*****************************/
static inline void enqueue(struct aptmethod *method, /*@only@*/struct tobedone *todo) {
todo->next = NULL;
if (method->lasttobedone == NULL)
method->nexttosend = method->lasttobedone = method->tobedone = todo;
else {
method->lasttobedone->next = todo;
method->lasttobedone = todo;
if (method->nexttosend == NULL)
method->nexttosend = todo;
}
}
static retvalue enqueuenew(struct aptmethod *method, /*@only@*/char *uri, /*@only@*/char *destfile, queue_callback *callback, void *privdata1, void *privdata2) {
struct tobedone *todo;
if (FAILEDTOALLOC(destfile)) {
free(uri);
return RET_ERROR_OOM;
}
if (FAILEDTOALLOC(uri)) {
free(destfile);
return RET_ERROR_OOM;
}
todo = NEW(struct tobedone);
if (FAILEDTOALLOC(todo)) {
free(uri); free(destfile);
return RET_ERROR_OOM;
}
todo->next = NULL;
todo->uri = uri;
todo->filename = destfile;
todo->callback = callback;
todo->privdata1 = privdata1;
todo->privdata2 = privdata2;
todo->lasttry = method->fallbackbaseuri == NULL;
enqueue(method, todo);
return RET_OK;
}
retvalue aptmethod_enqueue(struct aptmethod *method, const char *origfile, /*@only@*/char *destfile, queue_callback *callback, void *privdata1, void *privdata2) {
return enqueuenew(method,
calc_dirconcat(method->baseuri, origfile),
destfile, callback, privdata1, privdata2);
}
retvalue aptmethod_enqueueindex(struct aptmethod *method, const char *suite, const char *origfile, const char *suffix, const char *destfile, const char *downloadsuffix, queue_callback *callback, void *privdata1, void *privdata2) {
return enqueuenew(method,
mprintf("%s/%s/%s%s",
method->baseuri, suite, origfile, suffix),
mprintf("%s%s", destfile, downloadsuffix),
callback, privdata1, privdata2);
}
/*****************what to do with received files************************/
static retvalue requeue_or_fail(struct aptmethod *method, /*@only@*/struct tobedone *todo) {
retvalue r;
if (todo->lasttry) {
if (todo->callback == NULL)
r = RET_ERROR;
else
r = todo->callback(qa_error,
todo->privdata1, todo->privdata2,
todo->uri, NULL, todo->filename,
NULL, method->name);
todo_free(todo);
return r;
} else {
size_t l, old_len, new_len;
char *s;
assert (method->fallbackbaseuri != NULL);
old_len = strlen(method->baseuri);
new_len = strlen(method->fallbackbaseuri);
l = strlen(todo->uri);
s = malloc(l+new_len+1-old_len);
if (FAILEDTOALLOC(s)) {
todo_free(todo);
return RET_ERROR_OOM;
}
memcpy(s, method->fallbackbaseuri, new_len);
strcpy(s+new_len, todo->uri + old_len);
free(todo->uri);
todo->uri = s;
todo->lasttry = true;
enqueue(method, todo);
return RET_OK;
}
}
/* look which file could not be received and remove it: */
static retvalue urierror(struct aptmethod *method, const char *uri, /*@only@*/char *message) {
struct tobedone *todo, *lasttodo;
lasttodo = NULL; todo = method->tobedone;
while (todo != NULL) {
if (strcmp(todo->uri, uri) == 0) {
/* remove item: */
if (lasttodo == NULL)
method->tobedone = todo->next;
else
lasttodo->next = todo->next;
if (method->nexttosend == todo) {
/* just in case some method received
* files before we request them ;-) */
method->nexttosend = todo->next;
}
if (method->lasttobedone == todo) {
method->lasttobedone = todo->next;
}
fprintf(stderr,
"aptmethod error receiving '%s':\n'%s'\n",
uri, (message != NULL)?message:"");
/* put message in failed items to show it later? */
free(message);
return requeue_or_fail(method, todo);
}
lasttodo = todo;
todo = todo->next;
}
/* huh? If if have not asked for it, how can there be errors? */
fprintf(stderr,
"Method '%s' reported error with unrequested file '%s':\n'%s'!\n",
method->name, uri, message);
free(message);
return RET_ERROR;
}
/* look where a received file has to go to: */
static retvalue uridone(struct aptmethod *method, const char *uri, const char *filename, /*@only@*//*@null@*/struct checksums *checksumsfromapt) {
struct tobedone *todo, *lasttodo;
retvalue r;
lasttodo = NULL; todo = method->tobedone;
while (todo != NULL) {
if (strcmp(todo->uri, uri) != 0) {
lasttodo = todo;
todo = todo->next;
continue;
}
r = todo->callback(qa_got,
todo->privdata1, todo->privdata2,
todo->uri, filename, todo->filename,
checksumsfromapt, method->name);
checksums_free(checksumsfromapt);
/* remove item: */
if (lasttodo == NULL)
method->tobedone = todo->next;
else
lasttodo->next = todo->next;
if (method->nexttosend == todo) {
/* just in case some method received
* files before we request them ;-) */
method->nexttosend = todo->next;
}
if (method->lasttobedone == todo) {
method->lasttobedone = todo->next;
}
todo_free(todo);
return r;
}
/* huh? */
fprintf(stderr,
"Method '%s' retrieved unexpected file '%s' at '%s'!\n",
method->name, uri, filename);
checksums_free(checksumsfromapt);
return RET_ERROR;
}
/***************************Input and Output****************************/
static retvalue logmessage(const struct aptmethod *method, const char *chunk, const char *type) {
retvalue r;
char *message;
r = chunk_getvalue(chunk, "Message", &message);
if (RET_WAS_ERROR(r))
return r;
if (RET_IS_OK(r)) {
fprintf(stderr, "aptmethod '%s': '%s'\n",
method->baseuri, message);
free(message);
return RET_OK;
}
r = chunk_getvalue(chunk, "URI", &message);
if (RET_WAS_ERROR(r))
return r;
if (RET_IS_OK(r)) {
fprintf(stderr, "aptmethod %s '%s'\n", type, message);
free(message);
return RET_OK;
}
fprintf(stderr, "aptmethod '%s': '%s'\n", method->baseuri, type);
return RET_OK;
}
static inline retvalue gotcapabilities(struct aptmethod *method, const char *chunk) {
retvalue r;
r = chunk_gettruth(chunk, "Single-Instance");
if (RET_WAS_ERROR(r))
return r;
// TODO: what to do with this?
// if (r != RET_NOTHING) {
// fprintf(stderr, "WARNING: Single-instance not yet supported!\n");
// }
r = chunk_gettruth(chunk, "Send-Config");
if (RET_WAS_ERROR(r))
return r;
if (r != RET_NOTHING) {
assert(method->command == NULL);
method->alreadywritten = 0;
method->command = method->config;
method->config = NULL;
method->output_length = strlen(method->command);
if (verbose > 11) {
fprintf(stderr, "Sending config: '%s'\n",
method->command);
}
} else {
free(method->config);
method->config = NULL;
}
method->status = ams_ok;
return RET_OK;
}
static inline retvalue goturidone(struct aptmethod *method, const char *chunk) {
static const char * const method_hash_names[cs_COUNT] =
{ "MD5-Hash", "SHA1-Hash", "SHA256-Hash",
"Size" };
retvalue result, r;
char *uri, *filename;
enum checksumtype type;
char *hashes[cs_COUNT];
struct checksums *checksums = NULL;
//TODO: is it worth the mess to make this in-situ?
r = chunk_getvalue(chunk, "URI", &uri);
if (r == RET_NOTHING) {
fprintf(stderr,
"Missing URI header in uridone received from '%s' method!\n",
method->name);
r = RET_ERROR;
method->status = ams_failed;
}
if (RET_WAS_ERROR(r))
return r;
r = chunk_getvalue(chunk, "Filename", &filename);
if (r == RET_NOTHING) {
char *altfilename;
r = chunk_getvalue(chunk, "Alt-Filename", &altfilename);
if (r == RET_NOTHING) {
fprintf(stderr,
"Missing Filename header in uridone received from '%s' method!\n",
method->name);
r = urierror(method, uri, strdup(
"<no error but missing Filename from apt-method>"));
} else {
r = urierror(method, uri, mprintf(
"<File not there, apt-method suggests '%s' instead>", altfilename));
free(altfilename);
}
free(uri);
return r;
}
if (RET_WAS_ERROR(r)) {
free(uri);
return r;
}
if (verbose >= 1)
fprintf(stderr, "aptmethod got '%s'\n", uri);
result = RET_NOTHING;
for (type = cs_md5sum ; type < cs_COUNT ; type++) {
hashes[type] = NULL;
r = chunk_getvalue(chunk, method_hash_names[type],
&hashes[type]);
RET_UPDATE(result, r);
}
if (RET_IS_OK(result) && hashes[cs_md5sum] == NULL) {
/* the lenny version also has this, better ask for
* in case the old MD5-Hash vanishes in the future */
r = chunk_getvalue(chunk, "MD5Sum-Hash", &hashes[cs_md5sum]);
RET_UPDATE(result, r);
}
if (RET_WAS_ERROR(result)) {
free(uri); free(filename);
for (type = cs_md5sum ; type < cs_COUNT ; type++)
free(hashes[type]);
return result;
}
if (RET_IS_OK(result)) {
/* ignore errors, we can recompute them from the file */
(void)checksums_init(&checksums, hashes);
}
r = uridone(method, uri, filename, checksums);
free(uri);
free(filename);
return r;
}
static inline retvalue goturierror(struct aptmethod *method, const char *chunk) {
retvalue r;
char *uri, *message;
r = chunk_getvalue(chunk, "URI", &uri);
if (r == RET_NOTHING) {
fprintf(stderr,
"Missing URI header in urierror received from '%s' method!\n", method->name);
r = RET_ERROR;
}
if (RET_WAS_ERROR(r))
return r;
r = chunk_getvalue(chunk, "Message", &message);
if (r == RET_NOTHING) {
message = NULL;
}
if (RET_WAS_ERROR(r)) {
free(uri);
return r;
}
r = urierror(method, uri, message);
free(uri);
return r;
}
static inline retvalue parsereceivedblock(struct aptmethod *method, const char *input) {
const char *p;
retvalue r;
#define OVERLINE {while (*p != '\0' && *p != '\n') p++; if (*p == '\n') p++; }
while (*input == '\n' || *input == '\r')
input++;
if (*input == '\0') {
fprintf(stderr,
"Unexpected number of newlines from '%s' method!\n", method->name);
return RET_NOTHING;
}
p = input;
switch ((*(input+1)=='0')?*input:'\0') {
case '1':
switch (*(input+2)) {
/* 100 Capabilities */
case '0':
OVERLINE;
if (verbose > 14) {
fprintf(stderr, "Got '%s'\n",
input);
}
return gotcapabilities(method, input);
/* 101 Log */
case '1':
if (verbose > 10) {
OVERLINE;
return logmessage(method, p, "101");
}
return RET_OK;
/* 102 Status */
case '2':
if (verbose > 5) {
OVERLINE;
return logmessage(method, p, "102");
}
return RET_OK;
default:
fprintf(stderr,
"Error or unsupported message received: '%s'\n",
input);
return RET_ERROR;
}
case '2':
switch (*(input+2)) {
/* 200 URI Start */
case '0':
if (verbose > 5) {
OVERLINE;
return logmessage(method, p, "start");
}
return RET_OK;
/* 201 URI Done */
case '1':
OVERLINE;
return goturidone(method, p);
default:
fprintf(stderr,
"Error or unsupported message received: '%s'\n",
input);
return RET_ERROR;
}
case '4':
switch (*(input+2)) {
case '0':
OVERLINE;
r = goturierror(method, p);
break;
case '1':
OVERLINE;
(void)logmessage(method, p, "general error");
method->status = ams_failed;
r = RET_ERROR;
break;
default:
fprintf(stderr,
"Error or unsupported message received: '%s'\n",
input);
r = RET_ERROR;
}
/* a failed download is not a error yet, as it might
* be redone from another source later */
return r;
default:
fprintf(stderr,
"Unexpected data from '%s' method: '%s'\n",
method->name, input);
return RET_ERROR;
}
}
static retvalue receivedata(struct aptmethod *method) {
retvalue result;
ssize_t r;
char *p;
int consecutivenewlines;
assert (method->status != ams_ok || method->tobedone != NULL);
if (method->status != ams_waitforcapabilities
&& method->status != ams_ok)
return RET_NOTHING;
/* First look if we have enough room to read.. */
if (method->alreadyread + 1024 >= method->input_size) {
char *newptr;
if (method->input_size >= (size_t)128000) {
fprintf(stderr,
"Ridiculously long answer from method!\n");
method->status = ams_failed;
return RET_ERROR;
}
newptr = realloc(method->inputbuffer, method->alreadyread+1024);
if (FAILEDTOALLOC(newptr)) {
return RET_ERROR_OOM;
}
method->inputbuffer = newptr;
method->input_size = method->alreadyread + 1024;
}
assert (method->inputbuffer != NULL);
/* then read as much as the pipe is able to fill of our buffer */
r = read(method->mstdout, method->inputbuffer + method->alreadyread,
method->input_size - method->alreadyread - 1);
if (r < 0) {
int e = errno;
fprintf(stderr, "Error %d reading pipe from aptmethod: %s\n",
e, strerror(e));
method->status = ams_failed;
return RET_ERRNO(e);
}
method->alreadyread += r;
result = RET_NOTHING;
while(true) {
retvalue res;
r = method->alreadyread;
p = method->inputbuffer;
consecutivenewlines = 0;
while (r > 0) {
if (*p == '\0') {
fprintf(stderr,
"Unexpected Zeroes in method output!\n");
method->status = ams_failed;
return RET_ERROR;
} else if (*p == '\n') {
consecutivenewlines++;
if (consecutivenewlines >= 2)
break;
} else if (*p != '\r') {
consecutivenewlines = 0;
}
p++; r--;
}
if (r <= 0) {
return result;
}
*p ='\0'; p++; r--;
res = parsereceivedblock(method, method->inputbuffer);
if (r > 0)
memmove(method->inputbuffer, p, r);
method->alreadyread = r;
RET_UPDATE(result, res);
}
}
static retvalue senddata(struct aptmethod *method) {
size_t l;
ssize_t r;
if (method->status != ams_ok)
return RET_NOTHING;
if (method->command == NULL) {
const struct tobedone *todo;
/* nothing queued to send, nothing to be queued...*/
todo = method->nexttosend;
if (todo == NULL)
return RET_OK;
if (interrupted())
return RET_ERROR_INTERRUPTED;
method->alreadywritten = 0;
// TODO: make sure this is already checked for earlier...
assert (strchr(todo->uri, '\n') == NULL &&
strchr(todo->filename, '\n') == NULL);
/* http-aptmethod seems to loose the last byte,
* if the file is already in place,
* so we better unlink the target first...
* but this is done elsewhere already
unlink(todo->filename);
*/
method->command = mprintf(
"600 URI Acquire\nURI: %s\nFilename: %s\n\n",
todo->uri, todo->filename);
if (FAILEDTOALLOC(method->command)) {
return RET_ERROR_OOM;
}
method->output_length = strlen(method->command);
method->nexttosend = method->nexttosend->next;
}
l = method->output_length - method->alreadywritten;
r = write(method->mstdin, method->command + method->alreadywritten, l);
if (r < 0) {
int e = errno;
fprintf(stderr, "Error %d writing to pipe: %s\n",
e, strerror(e));
//TODO: disable the whole method??
method->status = ams_failed;
return RET_ERRNO(e);
} else if ((size_t)r < l) {
method->alreadywritten += r;
return RET_OK;
}
free(method->command);
method->command = NULL;
return RET_OK;
}
static retvalue checkchilds(struct aptmethodrun *run) {
pid_t child;int status;
retvalue result = RET_OK, r;
while ((child = waitpid(-1, &status, WNOHANG)) > 0) {
struct aptmethod *method;
for (method = run->methods ; method != NULL ;
method = method->next) {
if (method->child == child)
break;
}
if (method == NULL) {
/* perhaps an uncompressor terminated */
r = uncompress_checkpid(child, status);
if (RET_IS_OK(r))
continue;
if (RET_WAS_ERROR(r)) {
result = r;
continue;
}
else {
fprintf(stderr,
"Unexpected child died (maybe gpg died if signing/verifing was done): %d\n",
(int)child);
continue;
}
}
/* Make sure we do not cope with this child any more */
if (method->mstdin != -1) {
(void)close(method->mstdin);
method->mstdin = -1;
}
if (method->mstdout != -1) {
(void)close(method->mstdout);
method->mstdout = -1;
}
method->child = -1;
if (method->status != ams_failed)
method->status = ams_notstarted;