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csclient.cxx
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/*
Compile server client functions
Copyright (C) 2010-2013 Red Hat Inc.
This file is part of systemtap, and is free software. You can
redistribute it and/or modify it under the terms of the GNU General
Public License (GPL); either version 2, or (at your option) any
later version.
*/
// Completely disable the client if NSS is not available.
#include "config.h"
#if HAVE_NSS
#include "session.h"
#include "cscommon.h"
#include "csclient.h"
#include "util.h"
#include "stap-probe.h"
#include <sys/times.h>
#include <vector>
#include <fstream>
#include <sstream>
#include <cassert>
#include <cstdlib>
#include <cstdio>
#include <algorithm>
extern "C" {
#include <unistd.h>
#include <linux/limits.h>
#include <sys/time.h>
#include <glob.h>
#include <limits.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <net/if.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <pwd.h>
}
#if HAVE_AVAHI
extern "C" {
#include <avahi-client/client.h>
#include <avahi-client/lookup.h>
#include <avahi-common/simple-watch.h>
#include <avahi-common/malloc.h>
#include <avahi-common/error.h>
#include <avahi-common/timeval.h>
}
#endif // HAVE_AVAHI
extern "C" {
#include <ssl.h>
#include <nspr.h>
#include <nss.h>
#include <certdb.h>
#include <pk11pub.h>
#include <prerror.h>
#include <secerr.h>
#include <sslerr.h>
}
#include "nsscommon.h"
using namespace std;
#define STAP_CSC_01 _("WARNING: The domain name, %s, does not match the DNS name(s) on the server certificate:\n")
#define STAP_CSC_02 _("could not find input file %s\n")
#define STAP_CSC_03 _("could not open input file %s\n")
#define STAP_CSC_04 _("Unable to open output file %s\n")
#define STAP_CSC_05 _("could not write to %s\n")
static PRIPv6Addr ©Address (PRIPv6Addr &PRin6, const in6_addr &in6);
static PRNetAddr ©NetAddr (PRNetAddr &x, const PRNetAddr &y);
bool operator!= (const PRNetAddr &x, const PRNetAddr &y);
bool operator== (const PRNetAddr &x, const PRNetAddr &y);
extern "C"
void
nsscommon_error (const char *msg, int logit __attribute ((unused)))
{
clog << msg << endl << flush;
}
// Information about compile servers.
struct compile_server_info
{
compile_server_info ()
{
memset (& address, 0, sizeof (address));
}
string host_name;
PRNetAddr address;
string version;
string sysinfo;
string certinfo;
bool empty () const
{
return this->host_name.empty () && ! this->hasAddress ();
}
bool hasAddress () const
{
return this->address.raw.family != 0;
}
unsigned short port () const
{
if (this->address.raw.family == PR_AF_INET)
return ntohs (this->address.inet.port);
if (this->address.raw.family == PR_AF_INET6)
return ntohs (this->address.ipv6.port);
return 0;
}
unsigned short setPort (unsigned short port)
{
if (this->address.raw.family == PR_AF_INET)
return this->address.inet.port = htons (port);
if (this->address.raw.family == PR_AF_INET6)
return this->address.ipv6.port = htons (port);
return 0;
}
bool operator== (const compile_server_info &that) const
{
// If both ip addressed are not set, then the host names must match, otherwise
// the addresses must match.
if (! this->hasAddress() || ! that.hasAddress())
{
if (this->host_name != that.host_name)
return false;
}
else if (this->address != that.address)
return false;
// Compare the other fields only if they have both been set.
if (this->port() != 0 && that.port() != 0 &&
this->port() != that.port())
return false;
if (! this->version.empty () && ! that.version.empty () &&
this->version != that.version)
return false;
if (! this->sysinfo.empty () && ! that.sysinfo.empty () &&
this->sysinfo != that.sysinfo)
return false;
if (! this->certinfo.empty () && ! that.certinfo.empty () &&
this->certinfo != that.certinfo)
return false;
return true; // They are equal
}
// Used to sort servers by preference for order of contact. The preferred server is
// "less" than the other one.
bool operator< (const compile_server_info &that) const
{
// Prefer servers with a later (higher) version number.
cs_protocol_version this_version (this->version.c_str ());
cs_protocol_version that_version (that.version.c_str ());
return that_version < this_version;
}
};
ostream &operator<< (ostream &s, const compile_server_info &i);
ostream &operator<< (ostream &s, const vector<compile_server_info> &v);
static void
preferred_order (vector<compile_server_info> &servers)
{
// Sort the given list of servers into the preferred order for contacting.
// Don't bother if there are less than 2 servers in the list.
if (servers.size () < 2)
return;
// Sort the list using compile_server_info::operator<
sort (servers.begin (), servers.end ());
}
struct compile_server_cache
{
vector<compile_server_info> default_servers;
vector<compile_server_info> specified_servers;
vector<compile_server_info> trusted_servers;
vector<compile_server_info> signing_servers;
vector<compile_server_info> online_servers;
vector<compile_server_info> all_servers;
map<string,vector<compile_server_info> > resolved_servers;
};
// For filtering queries.
enum compile_server_properties {
compile_server_all = 0x1,
compile_server_trusted = 0x2,
compile_server_online = 0x4,
compile_server_compatible = 0x8,
compile_server_signer = 0x10,
compile_server_specified = 0x20
};
// Static functions.
static compile_server_cache* cscache(systemtap_session& s);
static void query_server_status (systemtap_session &s, const string &status_string);
static void get_server_info (systemtap_session &s, int pmask, vector<compile_server_info> &servers);
static void get_all_server_info (systemtap_session &s, vector<compile_server_info> &servers);
static void get_default_server_info (systemtap_session &s, vector<compile_server_info> &servers);
static void get_specified_server_info (systemtap_session &s, vector<compile_server_info> &servers, bool no_default = false);
static void get_or_keep_online_server_info (systemtap_session &s, vector<compile_server_info> &servers, bool keep);
static void get_or_keep_trusted_server_info (systemtap_session &s, vector<compile_server_info> &servers, bool keep);
static void get_or_keep_signing_server_info (systemtap_session &s, vector<compile_server_info> &servers, bool keep);
static void get_or_keep_compatible_server_info (systemtap_session &s, vector<compile_server_info> &servers, bool keep);
static void keep_common_server_info (const compile_server_info &info_to_keep, vector<compile_server_info> &filtered_info);
static void keep_common_server_info (const vector<compile_server_info> &info_to_keep, vector<compile_server_info> &filtered_info);
static void keep_server_info_with_cert_and_port (systemtap_session &s, const compile_server_info &server, vector<compile_server_info> &servers);
static void add_server_info (const compile_server_info &info, vector<compile_server_info>& list);
static void add_server_info (const vector<compile_server_info> &source, vector<compile_server_info> &target);
static void merge_server_info (const compile_server_info &source, compile_server_info &target);
#if 0 // not used right now
static void merge_server_info (const compile_server_info &source, vector<compile_server_info> &target);
static void merge_server_info (const vector<compile_server_info> &source, vector <compile_server_info> &target);
#endif
static void resolve_host (systemtap_session& s, compile_server_info &server, vector<compile_server_info> &servers);
/* Exit error codes */
#define SUCCESS 0
#define GENERAL_ERROR 1
#define CA_CERT_INVALID_ERROR 2
#define SERVER_CERT_EXPIRED_ERROR 3
// -----------------------------------------------------
// NSS related code used by the compile server client
// -----------------------------------------------------
static void add_server_trust (systemtap_session &s, const string &cert_db_path, const vector<compile_server_info> &server_list);
static void revoke_server_trust (systemtap_session &s, const string &cert_db_path, const vector<compile_server_info> &server_list);
static void get_server_info_from_db (systemtap_session &s, vector<compile_server_info> &servers, const string &cert_db_path);
static string global_client_cert_db_path () {
return SYSCONFDIR "/systemtap/ssl/client";
}
static string
private_ssl_cert_db_path ()
{
return local_client_cert_db_path ();
}
static string
global_ssl_cert_db_path ()
{
return global_client_cert_db_path ();
}
static string
signing_cert_db_path ()
{
return SYSCONFDIR "/systemtap/staprun";
}
/* Connection state. */
typedef struct connectionState_t
{
const char *hostName;
PRNetAddr addr;
const char *infileName;
const char *outfileName;
const char *trustNewServerMode;
} connectionState_t;
#if 0 /* No client authorization */
static char *
myPasswd(PK11SlotInfo *info, PRBool retry, void *arg)
{
char * passwd = NULL;
if ( (!retry) && arg )
passwd = PORT_Strdup((char *)arg);
return passwd;
}
#endif
/* Add the server's certificate to our database of trusted servers. */
static SECStatus
trustNewServer (CERTCertificate *serverCert)
{
SECStatus secStatus;
CERTCertTrust *trust = NULL;
PK11SlotInfo *slot = NULL;
/* Import the certificate. */
slot = PK11_GetInternalKeySlot();
const char *nickname = server_cert_nickname ();
secStatus = PK11_ImportCert(slot, serverCert, CK_INVALID_HANDLE, nickname, PR_FALSE);
if (secStatus != SECSuccess)
goto done;
/* Make it a trusted peer. */
trust = (CERTCertTrust *)PORT_ZAlloc(sizeof(CERTCertTrust));
if (! trust)
{
secStatus = SECFailure;
goto done;
}
secStatus = CERT_DecodeTrustString(trust, "P,P,P");
if (secStatus != SECSuccess)
goto done;
secStatus = CERT_ChangeCertTrust(CERT_GetDefaultCertDB(), serverCert, trust);
done:
if (slot)
PK11_FreeSlot (slot);
if (trust)
PORT_Free(trust);
return secStatus;
}
/* Called when the server certificate verification fails. This gives us
the chance to trust the server anyway and add the certificate to the
local database. */
static SECStatus
badCertHandler(void *arg, PRFileDesc *sslSocket)
{
SECStatus secStatus;
PRErrorCode errorNumber;
CERTCertificate *serverCert = NULL;
SECItem subAltName;
PRArenaPool *tmpArena = NULL;
CERTGeneralName *nameList, *current;
char *expected = NULL;
const connectionState_t *connectionState = (connectionState_t *)arg;
errorNumber = PR_GetError ();
switch (errorNumber)
{
case SSL_ERROR_BAD_CERT_DOMAIN:
/* Since we administer our own client-side databases of trustworthy
certificates, we don't need the domain name(s) on the certificate to
match. If the cert is in our database, then we can trust it.
Issue a warning and accept the certificate. */
expected = SSL_RevealURL (sslSocket);
fprintf (stderr, STAP_CSC_01, expected);
/* List the DNS names from the server cert as part of the warning.
First, find the alt-name extension on the certificate. */
subAltName.data = NULL;
serverCert = SSL_PeerCertificate (sslSocket);
secStatus = CERT_FindCertExtension (serverCert,
SEC_OID_X509_SUBJECT_ALT_NAME,
& subAltName);
if (secStatus != SECSuccess || ! subAltName.data)
{
fprintf (stderr, _("Unable to find alt name extension on the server certificate\n"));
secStatus = SECSuccess; /* Not a fatal error */
break;
}
// Now, decode the extension.
tmpArena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
if (! tmpArena)
{
fprintf (stderr, _("Out of memory\n"));
SECITEM_FreeItem(& subAltName, PR_FALSE);
secStatus = SECSuccess; /* Not a fatal error here */
break;
}
nameList = CERT_DecodeAltNameExtension (tmpArena, & subAltName);
SECITEM_FreeItem(& subAltName, PR_FALSE);
if (! nameList)
{
fprintf (stderr, _("Unable to decode alt name extension on server certificate\n"));
secStatus = SECSuccess; /* Not a fatal error */
break;
}
/* List the DNS names from the server cert as part of the warning.
The names are in a circular list. */
current = nameList;
do
{
/* Make sure this is a DNS name. */
if (current->type == certDNSName)
{
fprintf (stderr, " %.*s\n",
(int)current->name.other.len, current->name.other.data);
}
current = CERT_GetNextGeneralName (current);
}
while (current != nameList);
/* Accept the certificate */
secStatus = SECSuccess;
break;
case SEC_ERROR_CA_CERT_INVALID:
/* The server's certificate is not trusted. Should we trust it? */
secStatus = SECFailure; /* Do not trust by default. */
if (! connectionState->trustNewServerMode)
break;
/* Trust it for this session only? */
if (strcmp (connectionState->trustNewServerMode, "session") == 0)
{
secStatus = SECSuccess;
break;
}
/* Trust it permanently? */
if (strcmp (connectionState->trustNewServerMode, "permanent") == 0)
{
/* The user wants to trust this server. Get the server's certificate so
and add it to our database. */
serverCert = SSL_PeerCertificate (sslSocket);
if (serverCert != NULL)
{
secStatus = trustNewServer (serverCert);
}
}
break;
default:
secStatus = SECFailure; /* Do not trust this server */
break;
}
if (expected)
PORT_Free (expected);
if (tmpArena)
PORT_FreeArena (tmpArena, PR_FALSE);
if (serverCert != NULL)
{
CERT_DestroyCertificate (serverCert);
}
return secStatus;
}
static PRFileDesc *
setupSSLSocket (connectionState_t *connectionState)
{
PRFileDesc *tcpSocket;
PRFileDesc *sslSocket;
PRSocketOptionData socketOption;
PRStatus prStatus;
SECStatus secStatus;
tcpSocket = PR_OpenTCPSocket(connectionState->addr.raw.family);
if (tcpSocket == NULL)
goto loser;
/* Make the socket blocking. */
socketOption.option = PR_SockOpt_Nonblocking;
socketOption.value.non_blocking = PR_FALSE;
prStatus = PR_SetSocketOption(tcpSocket, &socketOption);
if (prStatus != PR_SUCCESS)
goto loser;
/* Import the socket into the SSL layer. */
sslSocket = SSL_ImportFD(NULL, tcpSocket);
if (!sslSocket)
goto loser;
/* Set configuration options. */
secStatus = SSL_OptionSet(sslSocket, SSL_SECURITY, PR_TRUE);
if (secStatus != SECSuccess)
goto loser;
secStatus = SSL_OptionSet(sslSocket, SSL_HANDSHAKE_AS_CLIENT, PR_TRUE);
if (secStatus != SECSuccess)
goto loser;
/* Set SSL callback routines. */
#if 0 /* no client authentication */
secStatus = SSL_GetClientAuthDataHook(sslSocket,
(SSLGetClientAuthData)myGetClientAuthData,
(void *)certNickname);
if (secStatus != SECSuccess)
goto loser;
#endif
#if 0 /* Use the default */
secStatus = SSL_AuthCertificateHook(sslSocket,
(SSLAuthCertificate)myAuthCertificate,
(void *)CERT_GetDefaultCertDB());
if (secStatus != SECSuccess)
goto loser;
#endif
secStatus = SSL_BadCertHook(sslSocket, (SSLBadCertHandler)badCertHandler,
connectionState);
if (secStatus != SECSuccess)
goto loser;
#if 0 /* No handshake callback */
secStatus = SSL_HandshakeCallback(sslSocket, myHandshakeCallback, NULL);
if (secStatus != SECSuccess)
goto loser;
#endif
return sslSocket;
loser:
if (tcpSocket)
PR_Close(tcpSocket);
return NULL;
}
static SECStatus
handle_connection (PRFileDesc *sslSocket, connectionState_t *connectionState)
{
PRInt32 numBytes;
char *readBuffer;
PRFileInfo info;
PRFileDesc *local_file_fd;
PRStatus prStatus;
SECStatus secStatus = SECSuccess;
#define READ_BUFFER_SIZE (60 * 1024)
/* If we don't have both the input and output file names, then we're
contacting this server only in order to establish trust. In this case send
0 as the file size and exit. */
if (! connectionState->infileName || ! connectionState->outfileName)
{
numBytes = htonl ((PRInt32)0);
numBytes = PR_Write (sslSocket, & numBytes, sizeof (numBytes));
if (numBytes < 0)
return SECFailure;
return SECSuccess;
}
/* read and send the data. */
/* Try to open the local file named.
* If successful, then write it to the server
*/
prStatus = PR_GetFileInfo(connectionState->infileName, &info);
if (prStatus != PR_SUCCESS ||
info.type != PR_FILE_FILE ||
info.size < 0)
{
fprintf (stderr, STAP_CSC_02,
connectionState->infileName);
return SECFailure;
}
local_file_fd = PR_Open(connectionState->infileName, PR_RDONLY, 0);
if (local_file_fd == NULL)
{
fprintf (stderr, STAP_CSC_03, connectionState->infileName);
return SECFailure;
}
/* Send the file size first, so the server knows when it has the entire file. */
numBytes = htonl ((PRInt32)info.size);
numBytes = PR_Write(sslSocket, & numBytes, sizeof (numBytes));
if (numBytes < 0)
{
PR_Close(local_file_fd);
return SECFailure;
}
/* Transmit the local file across the socket. */
numBytes = PR_TransmitFile(sslSocket, local_file_fd,
NULL, 0,
PR_TRANSMITFILE_KEEP_OPEN,
PR_INTERVAL_NO_TIMEOUT);
if (numBytes < 0)
{
PR_Close(local_file_fd);
return SECFailure;
}
PR_Close(local_file_fd);
/* read until EOF */
readBuffer = (char *)PORT_Alloc(READ_BUFFER_SIZE);
if (! readBuffer) {
fprintf (stderr, _("Out of memory\n"));
return SECFailure;
}
local_file_fd = PR_Open(connectionState->outfileName, PR_WRONLY | PR_CREATE_FILE | PR_TRUNCATE,
PR_IRUSR | PR_IWUSR | PR_IRGRP | PR_IWGRP | PR_IROTH);
if (local_file_fd == NULL)
{
fprintf (stderr, STAP_CSC_04, connectionState->outfileName);
return SECFailure;
}
while (PR_TRUE)
{
// No need for PR_Read_Complete here, since we're already managing multiple
// reads to a fixed size buffer.
numBytes = PR_Read (sslSocket, readBuffer, READ_BUFFER_SIZE);
if (numBytes == 0)
break; /* EOF */
if (numBytes < 0)
{
secStatus = SECFailure;
break;
}
/* Write to output file */
numBytes = PR_Write(local_file_fd, readBuffer, numBytes);
if (numBytes < 0)
{
fprintf (stderr, STAP_CSC_05, connectionState->outfileName);
secStatus = SECFailure;
break;
}
}
PR_Free(readBuffer);
PR_Close(local_file_fd);
/* Caller closes the socket. */
return secStatus;
}
/* make the connection.
*/
static SECStatus
do_connect (connectionState_t *connectionState)
{
PRFileDesc *sslSocket;
PRStatus prStatus;
SECStatus secStatus;
secStatus = SECSuccess;
/* Set up SSL secure socket. */
sslSocket = setupSSLSocket (connectionState);
if (sslSocket == NULL)
return SECFailure;
#if 0 /* no client authentication */
secStatus = SSL_SetPKCS11PinArg(sslSocket, password);
if (secStatus != SECSuccess)
goto done;
#endif
secStatus = SSL_SetURL(sslSocket, connectionState->hostName);
if (secStatus != SECSuccess)
goto done;
prStatus = PR_Connect(sslSocket, & connectionState->addr, PR_INTERVAL_NO_TIMEOUT);
if (prStatus != PR_SUCCESS)
{
secStatus = SECFailure;
goto done;
}
/* Established SSL connection, ready to send data. */
secStatus = SSL_ResetHandshake(sslSocket, /* asServer */ PR_FALSE);
if (secStatus != SECSuccess)
goto done;
/* This is normally done automatically on the first I/O operation,
but doing it here catches any authentication problems early. */
secStatus = SSL_ForceHandshake(sslSocket);
if (secStatus != SECSuccess)
goto done;
// Connect to the server and make the request.
secStatus = handle_connection(sslSocket, connectionState);
done:
prStatus = PR_Close(sslSocket);
return secStatus;
}
static bool
isIPv6LinkLocal (const PRNetAddr &address)
{
// Link-local addresses are members of the address block fe80::
if (address.raw.family == PR_AF_INET6 &&
address.ipv6.ip.pr_s6_addr[0] == 0xfe && address.ipv6.ip.pr_s6_addr[1] == 0x80)
return true;
return false;
}
int
client_connect (const compile_server_info &server,
const char* infileName, const char* outfileName,
const char* trustNewServer)
{
SECStatus secStatus;
PRErrorCode errorNumber;
int attempt;
int errCode = GENERAL_ERROR;
struct connectionState_t connectionState;
// Set up a connection state for use by NSS error callbacks.
memset (& connectionState, 0, sizeof (connectionState));
connectionState.hostName = server.host_name.c_str ();
connectionState.addr = server.address;
connectionState.infileName = infileName;
connectionState.outfileName = outfileName;
connectionState.trustNewServerMode = trustNewServer;
/* Some errors (see below) represent a situation in which trying again
should succeed. However, don't try forever. */
for (attempt = 0; attempt < 5; ++attempt)
{
secStatus = do_connect (& connectionState);
if (secStatus == SECSuccess)
return SUCCESS;
errorNumber = PR_GetError ();
switch (errorNumber)
{
case PR_CONNECT_RESET_ERROR:
/* Server was not ready. */
sleep (1);
break; /* Try again */
case SEC_ERROR_EXPIRED_CERTIFICATE:
/* The server's certificate has expired. It should
generate a new certificate. Return now and we'll try again. */
errCode = SERVER_CERT_EXPIRED_ERROR;
return errCode;
case SEC_ERROR_CA_CERT_INVALID:
/* The server's certificate is not trusted. The exit code must
reflect this. */
errCode = CA_CERT_INVALID_ERROR;
return errCode;
default:
/* This error is fatal. */
return errCode;
}
}
return errCode;
}
int
compile_server_client::passes_0_4 ()
{
PROBE1(stap, client__start, &s);
// arguments parsed; get down to business
if (s.verbose)
clog << _("Using a compile server.") << endl;
struct tms tms_before;
times (& tms_before);
struct timeval tv_before;
gettimeofday (&tv_before, NULL);
// Create the request package.
int rc = initialize ();
assert_no_interrupts();
if (rc != 0) goto done;
rc = create_request ();
assert_no_interrupts();
if (rc != 0) goto done;
rc = package_request ();
assert_no_interrupts();
if (rc != 0) goto done;
// Submit it to the server.
rc = find_and_connect_to_server ();
assert_no_interrupts();
if (rc != 0) goto done;
// Unpack and process the response.
rc = unpack_response ();
assert_no_interrupts();
if (rc != 0) goto done;
rc = process_response ();
done:
struct tms tms_after;
times (& tms_after);
unsigned _sc_clk_tck = sysconf (_SC_CLK_TCK);
struct timeval tv_after;
gettimeofday (&tv_after, NULL);
#define TIMESPRINT "in " << \
(tms_after.tms_cutime + tms_after.tms_utime \
- tms_before.tms_cutime - tms_before.tms_utime) * 1000 / (_sc_clk_tck) << "usr/" \
<< (tms_after.tms_cstime + tms_after.tms_stime \
- tms_before.tms_cstime - tms_before.tms_stime) * 1000 / (_sc_clk_tck) << "sys/" \
<< ((tv_after.tv_sec - tv_before.tv_sec) * 1000 + \
((long)tv_after.tv_usec - (long)tv_before.tv_usec) / 1000) << "real ms."
if (rc == 0)
{
// Save the module, if necessary.
if (s.last_pass == 4)
s.save_module = true;
// Copy module to the current directory.
if (! pending_interrupts)
{
if (s.save_module)
{
string module_src_path = s.tmpdir + "/" + s.module_filename();
string module_dest_path = s.module_filename();
copy_file (module_src_path, module_dest_path, s.verbose >= 3);
// Also copy the module signature, it it exists.
module_src_path += ".sgn";
if (file_exists (module_src_path))
{
module_dest_path += ".sgn";
copy_file(module_src_path, module_dest_path, s.verbose >= 3);
}
}
// Print the name of the module
if (s.last_pass == 4)
{
cout << s.module_filename() << endl;
}
}
}
// syntax errors, if any, are already printed
if (s.verbose)
{
string ws = s.winning_server;
if (ws == "") ws = "?";
clog << _("Passes: via server ") << ws << " "
<< getmemusage()
<< TIMESPRINT
<< endl;
}
if (rc && !s.listing_mode)
{
clog << _("Passes: via server failed. Try again with another '-v' option.") << endl;
}
PROBE1(stap, client__end, &s);
return rc;
}
// Initialize a client/server session.
int
compile_server_client::initialize ()
{
int rc = 0;
// Initialize session state
argc = 0;
// Private location for server certificates.
private_ssl_dbs.push_back (private_ssl_cert_db_path ());
// Additional public location.
public_ssl_dbs.push_back (global_ssl_cert_db_path ());
// Create a temporary directory to package things in.
client_tmpdir = s.tmpdir + "/client";
rc = create_dir (client_tmpdir.c_str ());
if (rc != 0)
{
const char* e = strerror (errno);
clog << _("ERROR: cannot create temporary directory (\"")
<< client_tmpdir << "\"): " << e
<< endl;
}
return rc;
}
// Create the request package.
int
compile_server_client::create_request ()
{
// Add the current protocol version.
int rc = write_to_file (client_tmpdir + "/version", CURRENT_CS_PROTOCOL_VERSION);
if (rc != 0)
return rc;
// Add the script file or script option
if (s.script_file != "")
{
if (s.script_file == "-")
{
// Copy the script from stdin
string packaged_script_dir = client_tmpdir + "/script";
rc = create_dir (packaged_script_dir.c_str ());
if (rc != 0)
{
const char* e = strerror (errno);
clog << _("ERROR: cannot create temporary directory ")
<< packaged_script_dir << ": " << e
<< endl;
return rc;
}
rc = ! copy_file("/dev/stdin", packaged_script_dir + "/-");
if (rc != 0)
return rc;
// Name the script in the packaged arguments.
rc = add_package_arg ("script/-");
if (rc != 0)
return rc;
}
else
{
// Add the script to our package. This will also name the script
// in the packaged arguments.
rc = include_file_or_directory ("script", s.script_file);
if (rc != 0)
return rc;
}
}
// Add -I paths. Skip the default directory.
if (s.include_arg_start != -1)
{
unsigned limit = s.include_path.size ();
for (unsigned i = s.include_arg_start; i < limit; ++i)
{
rc = add_package_arg ("-I");
if (rc != 0)
return rc;
rc = include_file_or_directory ("tapset", s.include_path[i]);
if (rc != 0)
return rc;
}
}
// Add other options.
rc = add_package_args ();
if (rc != 0)
return rc;
// Add the sysinfo file
string sysinfo = "sysinfo: " + s.kernel_release + " " + s.architecture;
rc = write_to_file (client_tmpdir + "/sysinfo", sysinfo);
if (rc != 0)
return rc;
// Add localization data
rc = add_localization_variables();
return rc;
}
// Add the arguments specified on the command line to the server request
// package, as appropriate.
int
compile_server_client::add_package_args ()
{
// stap arguments to be passed to the server.
int rc = 0;
unsigned limit = s.server_args.size();
for (unsigned i = 0; i < limit; ++i)
{
rc = add_package_arg (s.server_args[i]);
if (rc != 0)
return rc;
}
// Script arguments.
limit = s.args.size();
if (limit > 0) {
rc = add_package_arg ("--");
if (rc != 0)
return rc;
for (unsigned i = 0; i < limit; ++i)
{
rc = add_package_arg (s.args[i]);
if (rc != 0)
return rc;
}
}
return rc;
}
int
compile_server_client::add_package_arg (const string &arg)
{
int rc = 0;
ostringstream fname;
fname << client_tmpdir << "/argv" << ++argc;
write_to_file (fname.str (), arg); // NB: No terminating newline
return rc;
}
// Symbolically link the given file or directory into the client's temp
// directory under the given subdirectory.
int
compile_server_client::include_file_or_directory (
const string &subdir, const string &path
)
{
// Must predeclare these because we do use 'goto done' to
// exit from error situations.
vector<string> components;
string name;
int rc;