diff options
Diffstat (limited to 'driver.c')
| -rw-r--r-- | driver.c | 352 |
1 files changed, 174 insertions, 178 deletions
@@ -8,6 +8,7 @@ #include <config.h> #include <stdio.h> +#include <setjmp.h> #if defined(STDC_HEADERS) #include <stdlib.h> #include <string.h> @@ -38,10 +39,7 @@ #define SMTP_PORT 25 /* standard SMTP service port */ static struct method *protocol; - -static int alarmed; /* a flag to indicate that SIGALRM happened */ -static int mytimeout; /* server-nonresponse timeout for current query */ -static char *srvname; /* current server name for timeout message */ +static jmp_buf restart; char tag[TAGLEN]; static int tagnum; @@ -647,9 +645,6 @@ struct hostrec *queryctl; /* query control record */ lines++; } - if (alarmed) - return (0); - if (queryctl->mda[0]) { /* close the delivery pipe, we'll reopen before next message */ @@ -706,17 +701,8 @@ int do_protocol(queryctl, proto) struct hostrec *queryctl; /* parsed options with merged-in defaults */ struct method *proto; /* protocol method table */ { - int ok, len; - int mboxfd = -1; - char buf [POPBUFSIZE+1], host[HOSTLEN+1]; - int socket; - void (*sigsave)(); - int num, count, new, deletions = 0; - - srvname = queryctl->servername; - alarmed = 0; - sigsave = signal(SIGALRM, alarm_handler); - alarm (mytimeout = queryctl->timeout); + int ok, mboxfd = -1; + void (*sigsave)() = signal(SIGALRM, alarm_handler); #ifndef KERBEROS_V4 if (queryctl->authenticate == A_KERBEROS) @@ -734,201 +720,215 @@ struct method *proto; /* protocol method table */ fprintf(stderr, "Option --flush is not supported with %s\n", proto->name); - alarm(0); - signal(SIGALRM, sigsave); + alarm(0); + signal(SIGALRM, sigsave); return(PS_SYNTAX); } else if (queryctl->fetchall) { fprintf(stderr, "Option --all is not supported with %s\n", proto->name); - alarm(0); - signal(SIGALRM, sigsave); + alarm(0); + signal(SIGALRM, sigsave); return(PS_SYNTAX); } } + protocol = proto; tagnum = 0; tag[0] = '\0'; /* nuke any tag hanging out from previous query */ - protocol = proto; + ok = 0; - /* open a socket to the mail server */ - if ((socket = Socket(queryctl->servername, - queryctl->port ? queryctl->port : protocol->port))<0 - || alarmed) + if (setjmp(restart) == 1) + fprintf(stderr, + "fetchmail: timeout after %d seconds waiting for %s.\n", + queryctl->timeout, queryctl->servername); + else { - perror("fetchmail, connecting to host"); - ok = PS_SOCKET; - goto closeUp; - } + char buf [POPBUFSIZE+1], host[HOSTLEN+1]; + int socket, len, num, count, new, deletions = 0; + + alarm(queryctl->timeout); + + /* open a socket to the mail server */ + if ((socket = Socket(queryctl->servername, + queryctl->port ? queryctl->port : protocol->port))<0) + { + perror("fetchmail, connecting to host"); + ok = PS_SOCKET; + goto closeUp; + } #ifdef KERBEROS_V4 - if (queryctl->authenticate == A_KERBEROS) - { - ok = (kerberos_auth (socket, queryctl->canonical_name)); + if (queryctl->authenticate == A_KERBEROS) + { + ok = (kerberos_auth (socket, queryctl->canonical_name)); + if (ok != 0) + goto cleanUp; + } +#endif /* KERBEROS_V4 */ + + /* accept greeting message from mail server */ + ok = (protocol->parse_response)(socket, buf); if (ok != 0) goto cleanUp; - } -#endif /* KERBEROS_V4 */ - /* accept greeting message from mail server */ - ok = (protocol->parse_response)(socket, buf); - if (alarmed || ok != 0) - goto cleanUp; - - /* try to get authorized to fetch mail */ - shroud = queryctl->password; - ok = (protocol->getauth)(socket, queryctl, buf); - shroud = (char *)NULL; - if (alarmed || ok == PS_ERROR) - ok = PS_AUTHFAIL; - if (alarmed || ok != 0) - goto cleanUp; - - /* compute number of messages and number of new messages waiting */ - if ((protocol->getrange)(socket, queryctl, &count, &new) != 0 || alarmed) - goto cleanUp; - - /* show user how many messages we downloaded */ - if (outlevel > O_SILENT && outlevel < O_VERBOSE) - if (count == 0) - fprintf(stderr, "No mail from %s@%s\n", - queryctl->remotename, - queryctl->servername); - else - { - fprintf(stderr, "%d message%s", count, count > 1 ? "s" : ""); - if (new != -1 && (count - new) > 0) - fprintf(stderr, " (%d seen)", count-new); - fprintf(stderr, - " from %s@%s.\n", - queryctl->remotename, - queryctl->servername); - } + /* try to get authorized to fetch mail */ + shroud = queryctl->password; + ok = (protocol->getauth)(socket, queryctl, buf); + shroud = (char *)NULL; + if (ok == PS_ERROR) + ok = PS_AUTHFAIL; + if (ok != 0) + goto cleanUp; - if (check_only) - { - if (new == -1 || queryctl->fetchall) - new = count; - ok = ((new > 0) ? PS_SUCCESS : PS_NOMAIL); - goto closeUp; - } - else if (count > 0) - { - if (queryctl->mda[0] == '\0') - if ((mboxfd = Socket(queryctl->smtphost, SMTP_PORT)) < 0 - || SMTP_ok(mboxfd, NULL) != SM_OK - || SMTP_helo(mboxfd, queryctl->servername) != SM_OK - || alarmed) + /* compute number of messages and number of new messages waiting */ + if ((protocol->getrange)(socket, queryctl, &count, &new) != 0) + goto cleanUp; + + /* show user how many messages we downloaded */ + if (outlevel > O_SILENT && outlevel < O_VERBOSE) + if (count == 0) + fprintf(stderr, "No mail from %s@%s\n", + queryctl->remotename, + queryctl->servername); + else { - ok = PS_SMTP; - close(mboxfd); - mboxfd = -1; - goto cleanUp; + fprintf(stderr, "%d message%s", count, count > 1 ? "s" : ""); + if (new != -1 && (count - new) > 0) + fprintf(stderr, " (%d seen)", count-new); + fprintf(stderr, + " from %s@%s.\n", + queryctl->remotename, + queryctl->servername); } - - /* read, forward, and delete messages */ - for (num = 1; num <= count; num++) - { - int fetch_it = queryctl->fetchall || - !(protocol->is_old && (protocol->is_old)(socket,queryctl,num)); - /* we may want to reject this message if it's old */ - if (!fetch_it) - fprintf(stderr, "skipping message %d ", num); - else + if (check_only) + { + if (new == -1 || queryctl->fetchall) + new = count; + ok = ((new > 0) ? PS_SUCCESS : PS_NOMAIL); + goto closeUp; + } + else if (count > 0) + { + if (queryctl->mda[0] == '\0') + if ((mboxfd = Socket(queryctl->smtphost, SMTP_PORT)) < 0 + || SMTP_ok(mboxfd, NULL) != SM_OK + || SMTP_helo(mboxfd, queryctl->servername) != SM_OK) + { + ok = PS_SMTP; + close(mboxfd); + mboxfd = -1; + goto cleanUp; + } + + /* read, forward, and delete messages */ + for (num = 1; num <= count; num++) { - /* request a message */ - (protocol->fetch)(socket, num, &len); + int fetch_it = queryctl->fetchall || + !(protocol->is_old && (protocol->is_old)(socket,queryctl,num)); - if (outlevel > O_SILENT) + /* we may want to reject this message if it's old */ + if (!fetch_it) + fprintf(stderr, "skipping message %d ", num); + else { - fprintf(stderr, "reading message %d", num); - if (len > 0) - fprintf(stderr, " (%d bytes)", len); - if (outlevel == O_VERBOSE) - fputc('\n', stderr); - else - fputc(' ', stderr); + /* request a message */ + (protocol->fetch)(socket, num, &len); + + if (outlevel > O_SILENT) + { + fprintf(stderr, "reading message %d", num); + if (len > 0) + fprintf(stderr, " (%d bytes)", len); + if (outlevel == O_VERBOSE) + fputc('\n', stderr); + else + fputc(' ', stderr); + } + + /* + * If we're forwarding via SMTP, mboxfd is initialized + * at this point (it was set at start of retrieval). + * If we're using an MDA it's not set -- gen_readmsg() + * may have to parse message headers to know what + * delivery addresses should be passed to the MDA + */ + + /* read the message and ship it to the output sink */ + ok = gen_readmsg(socket, mboxfd, + len, + protocol->delimited, + queryctl); + + /* tell the server we got it OK and resynchronize */ + if (protocol->trail) + (protocol->trail)(socket, queryctl, num); + if (ok != 0) + goto cleanUp; } /* - * If we're forwarding via SMTP, mboxfd is initialized - * at this point (it was set at start of retrieval). - * If we're using an MDA it's not set -- gen_readmsg() - * may have to parse message headers to know what - * delivery addresses should be passed to the MDA + * At this point in flow of control, either we've bombed + * on a protocol error or had delivery refused by the SMTP + * server (unlikely -- I've never seen it) or we've seen + * `accepted for delivery' and the message is shipped. + * It's safe to mark the message seen and delete it on the + * server now. */ - /* read the message and ship it to the output sink */ - ok = gen_readmsg(socket, mboxfd, - len, - protocol->delimited, - queryctl); - - /* tell the server we got it OK and resynchronize */ - if (protocol->trail) - (protocol->trail)(socket, queryctl, num); - if (alarmed || ok != 0) - goto cleanUp; + /* maybe we delete this message now? */ + if (protocol->delete + && (fetch_it ? !queryctl->keep : queryctl->flush)) + { + deletions++; + if (outlevel > O_SILENT && outlevel < O_VERBOSE) + fprintf(stderr, " flushed\n", num); + ok = (protocol->delete)(socket, queryctl, num); + if (ok != 0) + goto cleanUp; + } + else if (outlevel > O_SILENT && outlevel < O_VERBOSE) + { + /* nuke it from the unseen-messages list */ + delete_uid(&queryctl->newsaved, num); + fprintf(stderr, " not flushed\n", num); + } } - /* - * At this point in flow of control, either we've bombed - * on a protocol error or had delivery refused by the SMTP - * server (unlikely -- I've never seen it) or we've seen - * `accepted for delivery' and the message is shipped. - * It's safe to mark the message seen and delete it on the - * server now. - */ - - /* maybe we delete this message now? */ - if (protocol->delete - && (fetch_it ? !queryctl->keep : queryctl->flush)) + /* remove all messages flagged for deletion */ + if (protocol->expunge_cmd && deletions > 0) { - deletions++; - if (outlevel > O_SILENT && outlevel < O_VERBOSE) - fprintf(stderr, " flushed\n", num); - ok = (protocol->delete)(socket, queryctl, num); - if (alarmed || ok != 0) + ok = gen_transact(socket, protocol->expunge_cmd); + if (ok != 0) goto cleanUp; } - else if (outlevel > O_SILENT && outlevel < O_VERBOSE) - { - /* nuke it from the unseen-messages list */ - delete_uid(&queryctl->newsaved, num); - fprintf(stderr, " not flushed\n", num); - } + + ok = gen_transact(socket, protocol->exit_cmd); + if (ok == 0) + ok = PS_SUCCESS; + close(socket); + goto closeUp; + } + else { + ok = gen_transact(socket, protocol->exit_cmd); + if (ok == 0) + ok = PS_NOMAIL; + close(socket); + goto closeUp; } - /* remove all messages flagged for deletion */ - if (protocol->expunge_cmd && deletions > 0) + cleanUp: + if (ok != 0 && ok != PS_SOCKET) { - ok = gen_transact(socket, protocol->expunge_cmd); - if (alarmed || ok != 0) - goto cleanUp; - } - - ok = gen_transact(socket, protocol->exit_cmd); - if (alarmed || ok == 0) - ok = PS_SUCCESS; - close(socket); - goto closeUp; - } - else { - ok = gen_transact(socket, protocol->exit_cmd); - if (ok == 0) - ok = PS_NOMAIL; - close(socket); - goto closeUp; + gen_transact(socket, protocol->exit_cmd); + close(socket); + } } -cleanUp: - if (ok != 0 && ok != PS_SOCKET) - { - gen_transact(socket, protocol->exit_cmd); - close(socket); - } + alarm(0); + signal(SIGALRM, sigsave); closeUp: if (mboxfd != -1) @@ -937,8 +937,7 @@ closeUp: SMTP_quit(mboxfd); close(mboxfd); } - alarm(0); - signal(SIGALRM, sigsave); + return(ok); } @@ -1052,10 +1051,7 @@ void alarm_handler (int signal) /* handle server-timeout signal */ { - alarmed = 1; - fprintf(stderr, - "fetchmail: timeout after %d seconds waiting for %s.\n", - mytimeout, srvname); + longjmp(restart, 1); } /* driver.c ends here */ |