sendmail: update by Vladimir
build system: tweak for rare case where include/autoconf.h does not get updated function old new delta packed_usage 26238 26242 +4 sendmail_main 1353 897 -456 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/1 up/down: 4/-456) Total: -452 bytes
This commit is contained in:
Denis Vlasenko
parent
d308106245
commit
88b8f0a347
@ -3686,32 +3686,27 @@
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"[OPTIONS] [rcpt]..."
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#define sendmail_full_usage "\n\n" \
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"Send an email\n" \
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"\nOptions:" \
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"\n -w timeout Network timeout" \
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"\n -N type Request delivery notification. Type is ignored" \
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"\n -f sender Sender" \
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"\n -F fullname Sender full name. Overrides $NAME" \
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USE_FEATURE_SENDMAIL_MAILX( \
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"\n -s subject Subject" \
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"\n -j charset Assume charset for body and subject (" CONFIG_FEATURE_MIME_CHARSET ")" \
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"\n -a file File to attach. May be repeated" \
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"\nStandard options:" \
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"\n -t Read recipients from message body, add them to those on cmdline" \
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"\n -f sender Sender. REQUIRED!" \
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"\n -o options various options. -oi IMPLIED! others are IGNORED!" \
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"\n" \
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"\nBusybox specific options:" \
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"\n -w seconds Network timeout" \
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"\n -H 'prog args' Run connection helper" \
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"\n Examples:" \
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"\n -H 'exec openssl s_client -quiet -tls1 -starttls smtp" \
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"\n -connect smtp.gmail.com:25' <email.txt" \
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"\n [4<username_and_passwd.txt]" \
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"\n [4<username_and_passwd.txt | -au<username> -ap<password>]" \
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"\n -H 'exec openssl s_client -quiet -tls1" \
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"\n -connect smtp.gmail.com:465' <email.txt" \
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"\n [4<username_and_passwd.txt]" \
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"\n [4<username_and_passwd.txt | -au<username> -ap<password>]" \
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"\n -S server[:port] Server" \
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) \
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USE_FEATURE_SENDMAIL_MAILXX( \
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"\n -c rcpt Cc: recipient. May be repeated" \
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"\n -e rcpt Errors-To: recipient" \
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) \
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"\n -t Read recipients and subject from body" \
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"\n -au<username> Username for AUTH LOGIN" \
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"\n -ap<password> Password for AUTH LOGIN" \
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"\n -am<method> Authentication method. Ignored. login is implied." \
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"\n" \
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"\nOther options are silently ignored; -oi is implied" \
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"\nOther options are silently ignored; -oi -t is implied" \
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#define seq_trivial_usage \
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"[-w] [-s SEP] [FIRST [INC]] LAST"
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@ -50,20 +50,4 @@ config SENDMAIL
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help
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Barebones sendmail.
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config FEATURE_SENDMAIL_MAILX
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bool "Allow to specify subject, attachments, their charset etc"
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default y
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depends on SENDMAIL
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help
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Allow to specify subject, attachments and their charset.
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Allow to use custom connection helper.
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config FEATURE_SENDMAIL_MAILXX
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bool "Allow to specify Cc: addresses and some additional headers"
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default n
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depends on FEATURE_SENDMAIL_MAILX
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help
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Allow to specify Cc: addresses and some additional headers:
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Errors-To:
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endmenu
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@ -61,35 +61,23 @@ static void rcptto(const char *s)
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int sendmail_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int sendmail_main(int argc UNUSED_PARAM, char **argv)
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{
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#if ENABLE_FEATURE_SENDMAIL_MAILX
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llist_t *opt_attachments = NULL;
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const char *opt_subject;
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#if ENABLE_FEATURE_SENDMAIL_MAILXX
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llist_t *opt_carboncopies = NULL;
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char *opt_errors_to;
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#endif
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#endif
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char *opt_connect = opt_connect;
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char *opt_from, *opt_fullname;
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char *boundary;
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llist_t *l;
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llist_t *headers = NULL;
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char *opt_from;
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char *s;
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llist_t *list = NULL;
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char *domain = sane_address(safe_getdomainname());
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int code;
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enum {
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OPT_w = 1 << 0, // network timeout
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OPT_t = 1 << 1, // read message for recipients
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OPT_N = 1 << 2, // request notification
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OPT_f = 1 << 3, // sender address
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OPT_F = 1 << 4, // sender name, overrides $NAME
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OPT_s = 1 << 5, // subject
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OPT_j = 1 << 6, // assumed charset
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OPT_a = 1 << 7, // attachment(s)
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OPT_H = 1 << 8, // use external connection helper
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OPT_S = 1 << 9, // specify connection string
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OPT_c = 1 << 10, // carbon copy
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OPT_e = 1 << 11, // errors-to address
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//--- standard options
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OPT_t = 1 << 0, // read message for recipients, append them to those on cmdline
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OPT_f = 1 << 1, // sender address
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OPT_o = 1 << 2, // various options. -oi IMPLIED! others are IGNORED!
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//--- BB specific options
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OPT_w = 1 << 3, // network timeout
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OPT_H = 1 << 4, // use external connection helper
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OPT_S = 1 << 5, // specify connection string
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OPT_a = 1 << 6, // authentication tokens
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};
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// init global variables
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@ -100,35 +88,42 @@ int sendmail_main(int argc UNUSED_PARAM, char **argv)
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G.fp0 = fdopen(3, "r");
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// parse options
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opt_complementary = "w+" USE_FEATURE_SENDMAIL_MAILX(":a::H--S:S--H") USE_FEATURE_SENDMAIL_MAILXX(":c::");
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opts = getopt32(argv,
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"w:t" "N:f:F:" USE_FEATURE_SENDMAIL_MAILX("s:j:a:H:S:") USE_FEATURE_SENDMAIL_MAILXX("c:e:")
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"X:V:vq:R:O:o:nmL:Iih:GC:B:b:A:" // postfix compat only, ignored
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// r:Q:p:M:Dd are candidates from another man page. TODO?
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"46E", // ssmtp introduces another quirks. TODO?: -a[upm] (user, pass, method) to be supported
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&timeout /* -w */, NULL, &opt_from, &opt_fullname,
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USE_FEATURE_SENDMAIL_MAILX(&opt_subject, &G.opt_charset, &opt_attachments, &opt_connect, &opt_connect,)
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USE_FEATURE_SENDMAIL_MAILXX(&opt_carboncopies, &opt_errors_to,)
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NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
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);
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// -f is required. -H and -S are mutually exclusive
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opt_complementary = "f:w+:H--S:S--H:a::";
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// N.B. since -H and -S are mutually exclusive they do not interfere in opt_connect
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// -a is for ssmtp (http://downloads.openwrt.org/people/nico/man/man8/ssmtp.8.html) compatibility,
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// it is still under development.
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opts = getopt32(argv, "tf:o:w:H:S:a::", &opt_from, NULL, &timeout, &opt_connect, &opt_connect, &list);
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//argc -= optind;
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argv += optind;
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// process -a[upm]<token> options
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if ((opts & OPT_a) && !list)
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bb_show_usage();
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while (list) {
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char *a = (char *) llist_pop(&list);
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if ('u' == a[0])
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G.user = xstrdup(a+1);
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if ('p' == a[0])
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G.pass = xstrdup(a+1);
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// N.B. we support only AUTH LOGIN so far
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//if ('m' == a[0])
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// G.method = xstrdup(a+1);
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}
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// N.B. list == NULL here
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//bb_info_msg("OPT[%x] AU[%s], AP[%s], AM[%s], ARGV[%s]", opts, au, ap, am, *argv);
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// connect to server
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#if ENABLE_FEATURE_SENDMAIL_MAILX
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// N.B. -H and -S are mutually exclusive so they do not spoil opt_connect
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// connection helper ordered? ->
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if (opts & OPT_H) {
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const char *args[] = { "sh", "-c", opt_connect, NULL };
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// plug it in
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launch_helper(args);
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// vanilla connection
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} else
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#endif
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{
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} else {
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int fd;
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// host[:port] not explicitly specified ? -> use $SMTPHOST
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// host[:port] not explicitly specified? -> use $SMTPHOST
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// no $SMTPHOST ? -> use localhost
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if (!(opts & OPT_S)) {
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opt_connect = getenv("SMTPHOST");
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@ -145,7 +140,7 @@ int sendmail_main(int argc UNUSED_PARAM, char **argv)
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// wait for initial server OK
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// N.B. if we used openssl the initial 220 answer is already swallowed during openssl TLS init procedure
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// so we need to push the server to see whether we are ok
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// so we need to kick the server to see whether we are ok
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code = smtp_check("NOOP", -1);
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// 220 on plain connection, 250 on openssl-helped TLS session
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if (220 == code)
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@ -157,6 +152,20 @@ int sendmail_main(int argc UNUSED_PARAM, char **argv)
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if (250 != smtp_checkp("EHLO %s", domain, -1)) {
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smtp_checkp("HELO %s", domain, 250);
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}
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if (ENABLE_FEATURE_CLEAN_UP)
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free(domain);
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// perform authentication
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if (opts & OPT_a) {
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smtp_check("AUTH LOGIN", 334);
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// we must read credentials unless they are given via -a[up] options
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if (!G.user || !G.pass)
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get_cred_or_die(4);
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encode_base64(NULL, G.user, NULL);
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smtp_check("", 334);
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encode_base64(NULL, G.pass, NULL);
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smtp_check("", 235);
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}
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// set sender
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// N.B. we have here a very loosely defined algotythm
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@ -170,201 +179,25 @@ int sendmail_main(int argc UNUSED_PARAM, char **argv)
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// file descriptor (e.g. 4), or again from a secured file.
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// got no sender address? -> use system username as a resort
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if (!(opts & OPT_f)) {
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// N.B. IMHO getenv("USER") can be way easily spoofed!
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G.user = xuid2uname(getuid());
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opt_from = xasprintf("%s@%s", G.user, domain);
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}
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if (ENABLE_FEATURE_CLEAN_UP)
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free(domain);
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// N.B. we marked -f as required option!
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//if (!G.user) {
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// // N.B. IMHO getenv("USER") can be way easily spoofed!
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// G.user = xuid2uname(getuid());
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// opt_from = xasprintf("%s@%s", G.user, domain);
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//}
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//if (ENABLE_FEATURE_CLEAN_UP)
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// free(domain);
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smtp_checkp("MAIL FROM:<%s>", opt_from, 250);
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code = -1; // first try softly without authentication
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while (250 != smtp_checkp("MAIL FROM:<%s>", opt_from, code)) {
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// MAIL FROM failed -> authentication needed
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if (334 == smtp_check("AUTH LOGIN", -1)) {
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// we must read credentials
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get_cred_or_die(4);
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encode_base64(NULL, G.user, NULL);
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smtp_check("", 334);
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encode_base64(NULL, G.pass, NULL);
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smtp_check("", 235);
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}
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// authenticated OK? -> retry to set sender
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// but this time die on failure!
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code = 250;
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}
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// process message
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// recipients specified as arguments
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while (*argv) {
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char *s = sane_address(*argv);
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// loose test on email address validity
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// if (strchr(s, '@')) {
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rcptto(s);
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llist_add_to_end(&headers, xasprintf("To: %s", s));
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// }
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argv++;
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}
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#if ENABLE_FEATURE_SENDMAIL_MAILXX
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// carbon copies recipients specified as -c options
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for (l = opt_carboncopies; l; l = l->link) {
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char *s = sane_address(l->data);
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// loose test on email address validity
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// if (strchr(s, '@')) {
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rcptto(s);
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// TODO: do we ever need to mangle the message?
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//llist_add_to_end(&headers, xasprintf("Cc: %s", s));
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// }
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}
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#endif
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// if -t specified or no recipients specified -> read recipients from message
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// i.e. scan stdin for To:, Cc:, Bcc: lines ...
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// ... and then use the rest of stdin as message body
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// N.B. subject read from body can be further overrided with one specified on command line.
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// recipients are merged. Bcc: lines are deleted
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// N.B. other headers are collected and will be dumped verbatim
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if (opts & OPT_t || !headers) {
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// fetch recipients and (optionally) subject
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char *s;
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while ((s = xmalloc_fgetline(G.fp0)) != NULL) {
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if (0 == strncasecmp("To: ", s, 4) || 0 == strncasecmp("Cc: ", s, 4)) {
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rcptto(sane_address(s+4));
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llist_add_to_end(&headers, s);
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} else if (0 == strncasecmp("Bcc: ", s, 5)) {
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rcptto(sane_address(s+5));
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free(s);
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// N.B. Bcc vanishes from headers!
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} else if (0 == strncmp("Subject: ", s, 9)) {
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// we read subject -> use it verbatim unless it is specified
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// on command line
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if (!(opts & OPT_s))
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llist_add_to_end(&headers, s);
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else
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free(s);
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} else if (s[0]) {
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// misc header
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llist_add_to_end(&headers, s);
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} else {
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free(s);
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break; // stop on the first empty line
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}
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}
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}
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// enter "put message" mode
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smtp_check("DATA", 354);
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// put headers we could have preread with -t
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for (l = headers; l; l = l->link) {
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printf("%s\r\n", l->data);
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if (ENABLE_FEATURE_CLEAN_UP)
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free(l->data);
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}
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// put (possibly encoded) subject
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#if ENABLE_FEATURE_SENDMAIL_MAILX
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if (opts & OPT_s) {
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printf("Subject: ");
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if (opts & OPT_j) {
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printf("=?%s?B?", G.opt_charset);
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encode_base64(NULL, opt_subject, NULL);
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printf("?=");
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} else {
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printf("%s", opt_subject);
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}
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printf("\r\n");
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}
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#endif
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// put sender name, $NAME is the default
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if (!(opts & OPT_F))
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opt_fullname = getenv("NAME");
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if (opt_fullname)
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printf("From: \"%s\" <%s>\r\n", opt_fullname, opt_from);
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// put notification
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if (opts & OPT_N)
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printf("Disposition-Notification-To: %s\r\n", opt_from);
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#if ENABLE_FEATURE_SENDMAIL_MAILXX
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// put errors recipient
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if (opts & OPT_e)
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printf("Errors-To: %s\r\n", opt_errors_to);
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#endif
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// make a random string -- it will delimit message parts
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srand(monotonic_us());
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boundary = xasprintf("%d=_%d-%d", rand(), rand(), rand());
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// put common headers
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// TODO: do we really need this?
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// printf("Message-ID: <%s>\r\n", boundary);
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#if ENABLE_FEATURE_SENDMAIL_MAILX
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// have attachments? -> compose multipart MIME
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if (opt_attachments) {
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const char *fmt;
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const char *p;
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char *q;
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printf(
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"Mime-Version: 1.0\r\n"
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"%smultipart/mixed; boundary=\"%s\"\r\n"
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, "Content-Type: "
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, boundary
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);
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// body is pseudo attachment read from stdin in first turn
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llist_add_to(&opt_attachments, (char *)"-");
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// put body + attachment(s)
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// N.B. all these weird things just to be tiny
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// by reusing string patterns!
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fmt =
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"\r\n--%s\r\n"
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"%stext/plain; charset=%s\r\n"
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"%s%s\r\n"
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"%s"
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;
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p = G.opt_charset;
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q = (char *)"";
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l = opt_attachments;
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while (l) {
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printf(
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fmt
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, boundary
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, "Content-Type: "
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, p
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, "Content-Disposition: inline"
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, q
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, "Content-Transfer-Encoding: base64\r\n"
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);
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p = "";
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fmt =
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"\r\n--%s\r\n"
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"%sapplication/octet-stream%s\r\n"
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"%s; filename=\"%s\"\r\n"
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"%s"
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;
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encode_base64(l->data, (const char *)G.fp0, "\r");
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l = l->link;
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if (l)
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q = bb_get_last_path_component_strip(l->data);
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}
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// put message terminator
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printf("\r\n--%s--\r\n" "\r\n", boundary);
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// no attachments? -> just dump message
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} else
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#endif
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{
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char *s;
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// terminate headers
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printf("\r\n");
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// put plain text respecting leading dots
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while ((s = xmalloc_fgetline(G.fp0)) != NULL) {
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// read recipients from message and add them to those given on cmdline.
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// this means we scan stdin for To:, Cc:, Bcc: lines until an empty line
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// and then use the rest of stdin as message body
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code = 0; // set "analyze headers" mode
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while ((s = xmalloc_fgetline(G.fp0)) != NULL) {
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// put message lines doubling leading dots
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if (code) {
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// escape leading dots
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// N.B. this feature is implied even if no -i (-oi) switch given
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// N.B. we need to escape the leading dot regardless of
|
||||
@ -373,10 +206,48 @@ int sendmail_main(int argc UNUSED_PARAM, char **argv)
|
||||
printf(".");
|
||||
// dump read line
|
||||
printf("%s\r\n", s);
|
||||
free(s);
|
||||
continue;
|
||||
}
|
||||
|
||||
// analyze headers
|
||||
// To: or Cc: headers add recipients
|
||||
if (0 == strncasecmp("To: ", s, 4) || 0 == strncasecmp("Bcc: " + 1, s, 4)) {
|
||||
rcptto(sane_address(s+4));
|
||||
// goto addh;
|
||||
llist_add_to_end(&list, s);
|
||||
// Bcc: header adds blind copy (hidden) recipient
|
||||
} else if (0 == strncasecmp("Bcc: ", s, 5)) {
|
||||
rcptto(sane_address(s+5));
|
||||
free(s);
|
||||
// N.B. Bcc: vanishes from headers!
|
||||
// other headers go verbatim
|
||||
} else if (s[0]) {
|
||||
// addh:
|
||||
llist_add_to_end(&list, s);
|
||||
// the empty line stops analyzing headers
|
||||
} else {
|
||||
free(s);
|
||||
// put recipients specified on cmdline
|
||||
while (*argv) {
|
||||
s = sane_address(*argv);
|
||||
rcptto(s);
|
||||
llist_add_to_end(&list, xasprintf("To: %s", s));
|
||||
argv++;
|
||||
}
|
||||
// enter "put message" mode
|
||||
smtp_check("DATA", 354);
|
||||
// dump the headers
|
||||
while (list) {
|
||||
printf("%s\r\n", (char *) llist_pop(&list));
|
||||
}
|
||||
printf("%s\r\n" + 2); // quirk for format string to be reused
|
||||
// stop analyzing headers
|
||||
code++;
|
||||
}
|
||||
}
|
||||
|
||||
// leave "put message" mode
|
||||
// finalize the message
|
||||
smtp_check(".", 250);
|
||||
// ... and say goodbye
|
||||
smtp_check("QUIT", 221);
|
||||
|
||||
@ -44,7 +44,13 @@ int file_write_dep(const char *name)
|
||||
else
|
||||
fprintf(out, "\t%s\n", file->name);
|
||||
}
|
||||
fprintf(out, "\n.config include/autoconf.h: $(deps_config)\n\n$(deps_config):\n");
|
||||
fprintf(out,
|
||||
"\n"
|
||||
".config include/autoconf.h: $(deps_config)\n"
|
||||
"\n"
|
||||
"include/autoconf.h: .config\n" /* bbox */
|
||||
"\n"
|
||||
"$(deps_config):\n");
|
||||
fclose(out);
|
||||
rename("..config.tmp", name);
|
||||
return 0;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user