report exceptions caught while processing requests

Signed-off-by: Michael Krelin <hacker@klever.net>

1 files changed, 13 insertions, 10 deletions

diff --git a/src/eyefiservice.cc b/src/eyefiservice.cc
index e89b2fc..276977a 100644
--- a/src/eyefiservice.cc
+++ b/src/eyefiservice.cc
@@ -1,167 +1,170 @@
 #include <cassert>
 #include <iostream>
 #include <fstream>
 #include <stdexcept>
 #include <iterator>
 #include <algorithm>
 #include <syslog.h>
 #include <sys/wait.h>
 #include <autosprintf.h>
 #include "eyekinfig.h"
 #include "eyetil.h"
 #include "soapeyefiService.h"
 
 static binary_t session_nonce;
 
 static bool detached_child() {
     pid_t p = fork();
     if(p<0) {
 	syslog(LOG_ERR,"Failed to fork away for hook execution");
 	_exit(-1);
     }
     if(!p) {
 	setsid();
 	for(int i=getdtablesize();i>=0;--i) close(i);
 	int i=open("/dev/null",O_RDWR); assert(i==0);
 	i = dup(i); assert(i==1);
 	i = dup(i); assert(i==2);
 	return true;
     }
     return false;
 }
 
+static int E(eyefiService* efs,const char *c,const std::exception& e) {
+    efs->keep_alive=0;
+    syslog(LOG_ERR,"error while processing %s: %s",c,e.what());
+    return efs->soap_receiverfault(gnu::autosprintf("error processing %s",c),0);
+}
+
 int eyefiService::StartSession(
 	std::string macaddress,std::string cnonce,
 	int transfermode,long transfermodetimestamp,
 	struct rns__StartSessionResponse &r ) try {
 #ifndef NDEBUG
     syslog(LOG_DEBUG,
 	    "StartSession request from %s with cnonce=%s, transfermode=%d, transfermodetimestamp=%ld",
 	    macaddress.c_str(), cnonce.c_str(), transfermode, transfermodetimestamp );
 #endif
     eyekinfig_t eyekinfig(macaddress);
     r.credential = binary_t(macaddress+cnonce+eyekinfig.get_upload_key()).md5().hex();
 
     r.snonce = session_nonce.make_nonce().hex();
     r.transfermode=transfermode;
     r.transfermodetimestamp=transfermodetimestamp;
     r.upsyncallowed=false;
 
     std::string cmd = eyekinfig.get_on_start_session();
     if(!cmd.empty()) {
 	if(detached_child()) {
 	    putenv( gnu::autosprintf("EYEFI_MACADDRESS=%s",macaddress.c_str()) );
 	    putenv( gnu::autosprintf("EYEFI_TRANSFERMODE=%d",transfermode) );
 	    putenv( gnu::autosprintf("EYEFI_TRANSFERMODETIMESTAMP=%ld",transfermodetimestamp) );
 	    char *argv[] = { (char*)"/bin/sh", (char*)"-c", (char*)cmd.c_str(), 0 };
 	    execv("/bin/sh",argv);
 	    syslog(LOG_ERR,"Failed to execute '%s'",cmd.c_str());
 	    _exit(-1);
 	}
     }
     return SOAP_OK;
-}catch(std::runtime_error& e) {
-    syslog(LOG_ERR,"error while processing StartSession: %s",e.what());
-    return soap_receiverfault(e.what(),0);
-}
+}catch(const std::exception& e) { return E(this,"StartSession",e); }
 
 int eyefiService::GetPhotoStatus(
 	std::string credential, std::string macaddress,
 	std::string filename, long filesize, std::string filesignature,
 	int flags,
-	struct rns__GetPhotoStatusResponse &r ) {
+	struct rns__GetPhotoStatusResponse &r ) try {
 #ifndef NDEBUG
     syslog(LOG_DEBUG,
 	    "GetPhotoStatus request from %s with credential=%s, filename=%s, filesize=%ld, filesignature=%s, flags=%d; session nonce=%s",
 	    macaddress.c_str(), credential.c_str(), filename.c_str(), filesize, filesignature.c_str(), flags,
 	    session_nonce.hex().c_str() );
 #endif
 
     std::string computed_credential = binary_t(macaddress+eyekinfig_t(macaddress).get_upload_key()+session_nonce.hex()).md5().hex();
 
 #ifndef NDEBUG
     syslog(LOG_DEBUG, " computed credential=%s", computed_credential.c_str());
 #endif
 
     if (credential != computed_credential) throw std::runtime_error("card authentication failed");
 
     r.fileid = 1; r.offset = 0;
     return SOAP_OK;
-}
+}catch(const std::exception& e) { return E(this,"GetPhotoStatus",e); }
 
 int eyefiService::MarkLastPhotoInRoll(
 	std::string macaddress, int mergedelta,
-	struct rns__MarkLastPhotoInRollResponse&/* r */ ) {
+	struct rns__MarkLastPhotoInRollResponse&/* r */ ) try {
 #ifndef NDEBUG
     syslog(LOG_DEBUG,
 	    "MarkLastPhotoInRoll request from %s with mergedelta=%d",
 	    macaddress.c_str(), mergedelta );
 #endif
     std::string cmd = eyekinfig_t(macaddress).get_on_mark_last_photo_in_roll();
     if(!cmd.empty()) {
 	if(detached_child()) {
 	    putenv( gnu::autosprintf("EYEFI_MACADDRESS=%s",macaddress.c_str()) );
 	    putenv( gnu::autosprintf("EYEFI_MERGEDELTA=%d",mergedelta) );
 	    char *argv[] = { (char*)"/bin/sh", (char*)"-c", (char*)cmd.c_str(), 0 };
 	    execv("/bin/sh",argv);
 	    syslog(LOG_ERR,"Failed to execute '%s'",cmd.c_str());
 	    _exit(-1);
 	}
     }
     keep_alive = 0;
     return SOAP_OK;
-}
+}catch(const std::exception& e) { return E(this,"MarkLastPhotoInRoll",e); }
 
 int eyefiService::UploadPhoto(
 	int fileid, std::string macaddress,
 	std::string filename, long filesize, std::string filesignature,
 	std::string encryption, int flags,
-	struct rns__UploadPhotoResponse& r ) {
+	struct rns__UploadPhotoResponse& r ) try {
 #ifndef NDEBUG
     syslog(LOG_DEBUG,
 	    "UploadPhoto request from %s with fileid=%d, filename=%s, filesize=%ld,"
 	    " filesignature=%s, encryption=%s, flags=%04X",
 	    macaddress.c_str(), fileid, filename.c_str(), filesize,
 	    filesignature.c_str(), encryption.c_str(), flags );
 #endif
     eyekinfig_t eyekinfig(macaddress);
 
     umask(eyekinfig.get_umask());
 
     std::string td = eyekinfig.get_targetdir();
     tmpdir_t indir(td+"/.incoming.XXXXXX");
 
     std::string tf,lf;
     binary_t digest, idigest;
 
     for(soap_multipart::iterator i=mime.begin(),ie=mime.end();i!=ie;++i) {
 #ifndef NDEBUG
 	syslog(LOG_DEBUG,
 		" MIME attachment with id=%s, type=%s, size=%ld",
 		(*i).id, (*i).type, (long)(*i).size );
 #endif
 
 	if((*i).id && !strcmp((*i).id,"INTEGRITYDIGEST")) {
 	    std::string idigestr((*i).ptr,(*i).size);
 #ifndef NDEBUG
 	    syslog(LOG_DEBUG, " INTEGRITYDIGEST=%s", idigestr.c_str());
 #endif
 	    idigest.from_hex(idigestr);
 	}
 	if( (*i).id && !strcmp((*i).id,"FILENAME") ) {
 	    assert( (*i).type && !strcmp((*i).type,"application/x-tar") );
 #ifdef III_SAVE_TARS
 	    std::string tarfile = indir.get_file(filename);
 	    {
 		std::ofstream(tarfile.c_str(),std::ios::out|std::ios::binary).write((*i).ptr,(*i).size);
 	    }
 #endif
 
 	    if(!tf.empty()) throw std::runtime_error("already seen tarball");
 	    if(!digest.empty()) throw std::runtime_error("already have integrity digest");
 	    digest = integrity_digest((*i).ptr,(*i).size,eyekinfig.get_upload_key());
 #ifndef NDEBUG
 	    syslog(LOG_DEBUG," computed integrity digest=%s", digest.hex().c_str());
 #endif
 
 	    tarchive_t a((*i).ptr,(*i).size);
@@ -181,49 +184,49 @@ int eyefiService::UploadPhoto(
 		else continue;
 		int fd=open(f.c_str(),O_CREAT|O_WRONLY,0666);
 		if(fd<0)
 		    throw std::runtime_error(gnu::autosprintf("failed to create output file '%s'",f.c_str()));
 		if(!a.read_data_into_fd(fd))
 		    throw std::runtime_error(gnu::autosprintf("failed to untar file into '%s'",f.c_str()));
 		close(fd);
 	    }
 	}
     }
 
     if(tf.empty()) throw std::runtime_error("haven't seen THE file");
     if(digest!=idigest) throw std::runtime_error("integrity digest verification failed");
 
     std::string::size_type ls = tf.rfind('/');
     // XXX: actually, lack of '/' signifies error here
     std::string tbn = (ls==std::string::npos)?tf:tf.substr(ls+1);
     ls = lf.rfind('/');
     std::string lbn = (ls==std::string::npos)?lf:lf.substr(ls+1);
     std::string ttf,tlf;
     bool success = false;
     for(int i=0;i<32767;++i) {
 	const char *fmt = i ? "%1$s/(%3$05d)%2$s" : "%1$s/%2$s";
 	ttf = (const char*)gnu::autosprintf(fmt,td.c_str(),tbn.c_str(),i);
 	if(!lf.empty()) tlf = (const char*)gnu::autosprintf(fmt,td.c_str(),lbn.c_str(),i);
 	if( (!link(tf.c_str(),ttf.c_str())) && (lf.empty() || !link(lf.c_str(),tlf.c_str())) ) {
 	    unlink(tf.c_str());
 	    if(!lf.empty()) unlink(lf.c_str());
 	    success=true;
 	    break;
 	}
     }
     std::string cmd = eyekinfig.get_on_upload_photo();
     if(success && !cmd.empty()) {
 	if(detached_child()) {
 	    putenv( gnu::autosprintf("EYEFI_UPLOADED_ORIG=%s",tbn.c_str()) );
 	    putenv( gnu::autosprintf("EYEFI_MACADDRESS=%s",macaddress.c_str()) );
 	    putenv( gnu::autosprintf("EYEFI_UPLOADED=%s",ttf.c_str()) );
 	    if(!lf.empty()) putenv( gnu::autosprintf("EYEFI_LOG=%s",tlf.c_str()) );
 	    char *argv[] = { (char*)"/bin/sh", (char*)"-c", (char*)cmd.c_str(), 0 };
 	    execv("/bin/sh",argv);
 	    syslog(LOG_ERR,"Failed to execute '%s'",cmd.c_str());
 	    _exit(-1);
 	}
     }
 
     r.success = true;
     return SOAP_OK;
-}
+}catch(const std::exception& e) { return E(this,"UploadPhoto",e); }