* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) University of Cambridge 1995 - 2016 */
+/* Copyright (c) University of Cambridge 1995 - 2018 */
/* See the file NOTICE for conditions of use and distribution. */
/* Functions for writing log files. The code for maintaining datestamped
US"Local-only delivery",
US"Domain in queue_domains",
US"Transport concurrency limit",
+ US"Event requests alternate response",
};
Arguments:
priority syslog priority
- s the string to be written, the string may be modified!
+ s the string to be written
Returns: nothing
*/
static void
-write_syslog(int priority, uschar *s)
+write_syslog(int priority, const uschar *s)
{
-int len, pass;
+int len;
int linecount = 0;
-if (running_in_test_harness) return;
-
-if (!syslog_timestamp) s += log_timezone ? 26 : 20;
if (!syslog_pid && LOGGING(pid))
- memmove(s + pid_position[0], s + pid_position[1], pid_position[1] - pid_position[0]);
+ s = string_sprintf("%.*s%s", (int)pid_position[0], s, s + pid_position[1]);
+if (!syslog_timestamp)
+ {
+ len = log_timezone ? 26 : 20;
+ if (LOGGING(millisec)) len += 4;
+ s += len;
+ }
len = Ustrlen(s);
#ifndef NO_OPENLOG
-if (!syslog_open)
+if (!syslog_open && !f.running_in_test_harness)
{
- #ifdef SYSLOG_LOG_PID
+# ifdef SYSLOG_LOG_PID
openlog(CS syslog_processname, LOG_PID|LOG_CONS, syslog_facility);
- #else
+# else
openlog(CS syslog_processname, LOG_CONS, syslog_facility);
- #endif
+# endif
syslog_open = TRUE;
}
#endif
/* First do a scan through the message in order to determine how many lines
it is going to end up as. Then rescan to output it. */
-for (pass = 0; pass < 2; pass++)
+for (int pass = 0; pass < 2; pass++)
{
- int i;
- int tlen;
- uschar *ss = s;
- for (i = 1, tlen = len; tlen > 0; i++)
+ const uschar * ss = s;
+ for (int i = 1, tlen = len; tlen > 0; i++)
{
int plen = tlen;
uschar *nlptr = Ustrchr(ss, '\n');
if (nlptr != NULL) plen = nlptr - ss;
- #ifndef SYSLOG_LONG_LINES
+#ifndef SYSLOG_LONG_LINES
if (plen > MAX_SYSLOG_LEN) plen = MAX_SYSLOG_LEN;
- #endif
+#endif
tlen -= plen;
if (ss[plen] == '\n') tlen--; /* chars left */
- if (pass == 0) linecount++; else
- {
+ if (pass == 0)
+ linecount++;
+ else if (f.running_in_test_harness)
+ if (linecount == 1)
+ fprintf(stderr, "SYSLOG: '%.*s'\n", plen, ss);
+ else
+ fprintf(stderr, "SYSLOG: '[%d%c%d] %.*s'\n", i,
+ ss[plen] == '\n' && tlen != 0 ? '\\' : '/',
+ linecount, plen, ss);
+ else
if (linecount == 1)
syslog(priority, "%.*s", plen, ss);
else
syslog(priority, "[%d%c%d] %.*s", i,
- (ss[plen] == '\n' && tlen != 0)? '\\' : '/',
+ ss[plen] == '\n' && tlen != 0 ? '\\' : '/',
linecount, plen, ss);
- }
+
ss += plen;
if (*ss == '\n') ss++;
}
{
write_syslog(LOG_CRIT, s1);
if (debug_file) debug_printf("%s\n", s1);
- if (log_stderr != NULL && log_stderr != debug_file)
+ if (log_stderr && log_stderr != debug_file)
fprintf(log_stderr, "%s\n", s1);
}
-if (receive_call_bombout) receive_bomb_out(NULL, s2); /* does not return */
+if (f.receive_call_bombout) receive_bomb_out(NULL, s2); /* does not return */
if (smtp_input) smtp_closedown(s2);
-exim_exit(EXIT_FAILURE);
+exim_exit(EXIT_FAILURE, NULL);
}
else if (string_datestamp_offset >= 0)
{
- uschar *from = buffer + string_datestamp_offset;
- uschar *to = from + string_datestamp_length;
+ uschar * from = buffer + string_datestamp_offset;
+ uschar * to = from + string_datestamp_length;
+
if (from == buffer || from[-1] == '/')
{
if (!isalnum(*to)) to++;
}
else
- {
if (!isalnum(from[-1])) from--;
- }
- /* This strcpy is ok, because we know that to is a substring of from. */
-
- Ustrcpy(from, to);
+ /* This copy is ok, because we know that to is a substring of from. But
+ due to overlap we must use memmove() not Ustrcpy(). */
+ memmove(from, to, Ustrlen(to)+1);
}
/* If the file name is too long, it is an unrecoverable disaster */
Returns: updated pointer
*/
-static uschar *
-log_config_info(uschar *ptr, int flags)
+static gstring *
+log_config_info(gstring * g, int flags)
{
-Ustrcpy(ptr, "Exim configuration error");
-ptr += 24;
+g = string_cat(g, US"Exim configuration error");
-if ((flags & (LOG_CONFIG_FOR & ~LOG_CONFIG)) != 0)
- {
- Ustrcpy(ptr, " for ");
- return ptr + 5;
- }
+if (flags & (LOG_CONFIG_FOR & ~LOG_CONFIG))
+ return string_cat(g, US" for ");
-if ((flags & (LOG_CONFIG_IN & ~LOG_CONFIG)) != 0)
- ptr += sprintf(CS ptr, " in line %d of %s", config_lineno, config_filename);
+if (flags & (LOG_CONFIG_IN & ~LOG_CONFIG))
+ g = string_fmt_append(g, " in line %d of %s", config_lineno, config_filename);
-Ustrcpy(ptr, ":\n ");
-return ptr + 4;
+return string_catn(g, US":\n ", 4);
}
void
log_write(unsigned int selector, int flags, const char *format, ...)
{
-uschar * ptr;
-int length;
int paniclogfd;
ssize_t written_len;
+gstring gs = { .size = LOG_BUFFER_SIZE-1, .ptr = 0, .s = log_buffer };
+gstring * g;
va_list ap;
/* If panic_recurseflag is set, we have failed to open the panic log. This is
if (panic_recurseflag)
{
- uschar *extra = (panic_save_buffer == NULL)? US"" : panic_save_buffer;
- if (debug_file != NULL) debug_printf("%s%s", extra, log_buffer);
- if (log_stderr != NULL && log_stderr != debug_file)
+ uschar *extra = panic_save_buffer ? panic_save_buffer : US"";
+ if (debug_file) debug_printf("%s%s", extra, log_buffer);
+ if (log_stderr && log_stderr != debug_file)
fprintf(log_stderr, "%s%s", extra, log_buffer);
- if (*extra != 0) write_syslog(LOG_CRIT, extra);
+ if (*extra) write_syslog(LOG_CRIT, extra);
write_syslog(LOG_CRIT, log_buffer);
die(US"exim: could not open panic log - aborting: see message(s) above",
US"Unexpected log failure, please try later");
if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
{
fprintf(stderr, "exim: failed to get store for log buffer\n");
- exim_exit(EXIT_FAILURE);
+ exim_exit(EXIT_FAILURE, NULL);
}
/* If we haven't already done so, inspect the setting of log_file_path to
int sep = ':'; /* Fixed separator - outside use */
uschar *s;
const uschar *ss = log_file_path;
+
logging_mode = 0;
while ((s = string_nextinlist(&ss, &sep, log_buffer, LOG_BUFFER_SIZE)))
{
if (Ustrcmp(s, "syslog") == 0)
logging_mode |= LOG_MODE_SYSLOG;
- else if ((logging_mode & LOG_MODE_FILE) != 0) multiple = TRUE;
+ else if (logging_mode & LOG_MODE_FILE)
+ multiple = TRUE;
else
{
logging_mode |= LOG_MODE_FILE;
/* Set up the ultimate default if necessary. Then revert to the old store
pool, and record that we've sorted out the path. */
- if ((logging_mode & LOG_MODE_FILE) != 0 && file_path[0] == 0)
+ if (logging_mode & LOG_MODE_FILE && !file_path[0])
file_path = string_sprintf("%s/log/%%slog", spool_directory);
store_pool = old_pool;
path_inspected = TRUE;
DEBUG(D_any|D_v)
{
int i;
- ptr = log_buffer;
- Ustrcpy(ptr, "LOG:");
- ptr += 4;
+ g = string_catn(&gs, US"LOG:", 4);
/* Show the selector that was passed into the call. */
{
unsigned int bitnum = log_options[i].bit;
if (bitnum < BITWORDSIZE && selector == BIT(bitnum))
- {
- *ptr++ = ' ';
- Ustrcpy(ptr, log_options[i].name);
- while (*ptr) ptr++;
- }
+ g = string_fmt_append(g, " %s", log_options[i].name);
}
- ptr += sprintf(CS ptr, "%s%s%s%s\n ",
- ((flags & LOG_MAIN) != 0)? " MAIN" : "",
- ((flags & LOG_PANIC) != 0)? " PANIC" : "",
- ((flags & LOG_PANIC_DIE) == LOG_PANIC_DIE)? " DIE" : "",
- ((flags & LOG_REJECT) != 0)? " REJECT" : "");
+ g = string_fmt_append(g, "%s%s%s%s\n ",
+ flags & LOG_MAIN ? " MAIN" : "",
+ flags & LOG_PANIC ? " PANIC" : "",
+ (flags & LOG_PANIC_DIE) == LOG_PANIC_DIE ? " DIE" : "",
+ flags & LOG_REJECT ? " REJECT" : "");
- if ((flags & LOG_CONFIG) != 0) ptr = log_config_info(ptr, flags);
+ if (flags & LOG_CONFIG) g = log_config_info(g, flags);
+
+ /* We want to be able to log tainted info, but log_buffer is directly
+ malloc'd. So use deliberately taint-nonchecking routines to build into
+ it, trusting that we will never expand the results. */
va_start(ap, format);
- if (!string_vformat(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer)-1, format, ap))
- Ustrcpy(ptr, "**** log string overflowed log buffer ****");
+ i = g->ptr;
+ if (!string_vformat(g, SVFMT_TAINT_NOCHK, format, ap))
+ {
+ g->ptr = i;
+ g = string_cat(g, US"**** log string overflowed log buffer ****");
+ }
va_end(ap);
- while(*ptr) ptr++;
- Ustrcat(ptr, "\n");
- debug_printf("%s", log_buffer);
- }
+ g->size = LOG_BUFFER_SIZE;
+ g = string_catn(g, US"\n", 1);
+ debug_printf("%s", string_from_gstring(g));
+ gs.size = LOG_BUFFER_SIZE-1; /* Having used the buffer for debug output, */
+ gs.ptr = 0; /* reset it for the real use. */
+ gs.s = log_buffer;
+ }
/* If no log file is specified, we are in a mess. */
-if ((flags & (LOG_MAIN|LOG_PANIC|LOG_REJECT)) == 0)
+if (!(flags & (LOG_MAIN|LOG_PANIC|LOG_REJECT)))
log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_write called with no log "
"flags set");
/* There are some weird circumstances in which logging is disabled. */
-if (disable_logging)
+if (f.disable_logging)
{
DEBUG(D_any) debug_printf("log writing disabled\n");
return;
/* Create the main message in the log buffer. Do not include the message id
when called by a utility. */
-ptr = log_buffer;
-ptr += sprintf(CS ptr, "%s ", tod_stamp(tod_log));
+g = string_fmt_append(&gs, "%s ", tod_stamp(tod_log));
if (LOGGING(pid))
{
- if (!syslog_pid) pid_position[0] = ptr - log_buffer; /* remember begin … */
- ptr += sprintf(CS ptr, "[%d] ", (int)getpid());
- if (!syslog_pid) pid_position[1] = ptr - log_buffer; /* … and end+1 of the PID */
+ if (!syslog_pid) pid_position[0] = g->ptr; /* remember begin … */
+ g = string_fmt_append(g, "[%d] ", (int)getpid());
+ if (!syslog_pid) pid_position[1] = g->ptr; /* … and end+1 of the PID */
}
-if (really_exim && message_id[0] != 0)
- ptr += sprintf(CS ptr, "%s ", message_id);
+if (f.really_exim && message_id[0] != 0)
+ g = string_fmt_append(g, "%s ", message_id);
-if ((flags & LOG_CONFIG) != 0) ptr = log_config_info(ptr, flags);
+if (flags & LOG_CONFIG)
+ g = log_config_info(g, flags);
va_start(ap, format);
-if (!string_vformat(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer)-1, format, ap))
- Ustrcpy(ptr, "**** log string overflowed log buffer ****\n");
-while(*ptr) ptr++;
+ {
+ int i = g->ptr;
+
+ /* We want to be able to log tainted info, but log_buffer is directly
+ malloc'd. So use deliberately taint-nonchecking routines to build into
+ it, trusting that we will never expand the results. */
+
+ if (!string_vformat(g, SVFMT_TAINT_NOCHK, format, ap))
+ {
+ g->ptr = i;
+ g = string_cat(g, US"**** log string overflowed log buffer ****\n");
+ }
+ }
va_end(ap);
/* Add the raw, unrewritten, sender to the message if required. This is done
this way because it kind of fits with LOG_RECIPIENTS. */
-if ((flags & LOG_SENDER) != 0 &&
- ptr < log_buffer + LOG_BUFFER_SIZE - 10 - Ustrlen(raw_sender))
- ptr += sprintf(CS ptr, " from <%s>", raw_sender);
+if ( flags & LOG_SENDER
+ && g->ptr < LOG_BUFFER_SIZE - 10 - Ustrlen(raw_sender))
+ g = string_fmt_append_f(g, SVFMT_TAINT_NOCHK, " from <%s>", raw_sender);
/* Add list of recipients to the message if required; the raw list,
before rewriting, was saved in raw_recipients. There may be none, if an ACL
discarded them all. */
-if ((flags & LOG_RECIPIENTS) != 0 && ptr < log_buffer + LOG_BUFFER_SIZE - 6 &&
- raw_recipients_count > 0)
+if ( flags & LOG_RECIPIENTS
+ && g->ptr < LOG_BUFFER_SIZE - 6
+ && raw_recipients_count > 0)
{
int i;
- ptr += sprintf(CS ptr, " for");
+ g = string_fmt_append_f(g, SVFMT_TAINT_NOCHK, " for", NULL);
for (i = 0; i < raw_recipients_count; i++)
{
uschar * s = raw_recipients[i];
- if (log_buffer + LOG_BUFFER_SIZE - ptr < Ustrlen(s) + 3) break;
- ptr += sprintf(CS ptr, " %s", s);
+ if (LOG_BUFFER_SIZE - g->ptr < Ustrlen(s) + 3) break;
+ g = string_fmt_append_f(g, SVFMT_TAINT_NOCHK, " %s", s);
}
}
-ptr += sprintf(CS ptr, "\n");
-length = ptr - log_buffer;
+g = string_catn(g, US"\n", 1);
+string_from_gstring(g);
/* Handle loggable errors when running a utility, or when address testing.
Write to log_stderr unless debugging (when it will already have been written),
or unless there is no log_stderr (expn called from daemon, for example). */
-if (!really_exim || log_testing_mode)
+if (!f.really_exim || f.log_testing_mode)
{
- if (debug_selector == 0 && log_stderr != NULL &&
- (selector == 0 || (selector & log_selector[0]) != 0))
- {
+ if ( !debug_selector
+ && log_stderr
+ && (selector == 0 || (selector & log_selector[0]) != 0)
+ )
if (host_checking)
fprintf(log_stderr, "LOG: %s", CS(log_buffer + 20)); /* no timestamp */
else
fprintf(log_stderr, "%s", CS log_buffer);
- }
- if ((flags & LOG_PANIC_DIE) == LOG_PANIC_DIE) exim_exit(EXIT_FAILURE);
+
+ if ((flags & LOG_PANIC_DIE) == LOG_PANIC_DIE) exim_exit(EXIT_FAILURE, US"");
return;
}
/* Failing to write to the log is disastrous */
- written_len = write_to_fd_buf(mainlogfd, log_buffer, length);
- if (written_len != length)
+ written_len = write_to_fd_buf(mainlogfd, g->s, g->ptr);
+ if (written_len != g->ptr)
{
- log_write_failed(US"main log", length, written_len);
+ log_write_failed(US"main log", g->ptr, written_len);
/* That function does not return */
}
}
the rejection is happening after the DATA phase), log the recipients and the
headers. */
-if ((flags & LOG_REJECT) != 0)
+if (flags & LOG_REJECT)
{
- header_line *h;
-
- if (header_list != NULL && LOGGING(rejected_header))
+ if (header_list && LOGGING(rejected_header))
{
+ gstring * g2;
+ int i;
+
if (recipients_count > 0)
{
- int i;
-
/* List the sender */
- string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer),
- "Envelope-from: <%s>\n", sender_address);
- while (*ptr) ptr++;
+ g2 = string_fmt_append_f(g, SVFMT_TAINT_NOCHK,
+ "Envelope-from: <%s>\n", sender_address);
+ if (g2) g = g2;
/* List up to 5 recipients */
- string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer),
- "Envelope-to: <%s>\n", recipients_list[0].address);
- while (*ptr) ptr++;
+ g2 = string_fmt_append_f(g, SVFMT_TAINT_NOCHK,
+ "Envelope-to: <%s>\n", recipients_list[0].address);
+ if (g2) g = g2;
for (i = 1; i < recipients_count && i < 5; i++)
{
- string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer), " <%s>\n",
- recipients_list[i].address);
- while (*ptr) ptr++;
+ g2 = string_fmt_append_f(g, SVFMT_TAINT_NOCHK,
+ " <%s>\n", recipients_list[i].address);
+ if (g2) g = g2;
}
if (i < recipients_count)
{
- (void)string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer),
- " ...\n");
- while (*ptr) ptr++;
+ g2 = string_fmt_append_f(g, SVFMT_TAINT_NOCHK, " ...\n", NULL);
+ if (g2) g = g2;
}
}
/* A header with a NULL text is an unfilled in Received: header */
- for (h = header_list; h; h = h->next) if (h->text)
+ for (header_line * h = header_list; h; h = h->next) if (h->text)
{
- BOOL fitted = string_format(ptr, LOG_BUFFER_SIZE - (ptr-log_buffer),
- "%c %s", h->type, h->text);
- while(*ptr) ptr++;
- if (!fitted) /* Buffer is full; truncate */
+ g2 = string_fmt_append_f(g, SVFMT_TAINT_NOCHK,
+ "%c %s", h->type, h->text);
+ if (g2)
+ g = g2;
+ else /* Buffer is full; truncate */
{
- ptr -= 100; /* For message and separator */
- if (ptr[-1] == '\n') ptr--;
- Ustrcpy(ptr, "\n*** truncated ***\n");
- while (*ptr) ptr++;
+ g->ptr -= 100; /* For message and separator */
+ if (g->s[g->ptr-1] == '\n') g->ptr--;
+ g = string_cat(g, US"\n*** truncated ***\n");
break;
}
}
-
- length = ptr - log_buffer;
}
/* Write to syslog or to a log file */
- if ((logging_mode & LOG_MODE_SYSLOG) != 0 &&
- (syslog_duplication || (flags & LOG_PANIC) == 0))
- write_syslog(LOG_NOTICE, log_buffer);
+ if ( logging_mode & LOG_MODE_SYSLOG
+ && (syslog_duplication || !(flags & LOG_PANIC)))
+ write_syslog(LOG_NOTICE, string_from_gstring(g));
/* Check for a change to the rejectlog file name when datestamping is in
operation. This happens at midnight, at which point we want to roll over
the file. Closing it has the desired effect. */
- if ((logging_mode & LOG_MODE_FILE) != 0)
+ if (logging_mode & LOG_MODE_FILE)
{
struct stat statbuf;
happening. */
if (rejectlogfd >= 0)
- {
if (Ustat(rejectlog_name, &statbuf) < 0 ||
statbuf.st_ino != rejectlog_inode)
{
rejectlogfd = -1;
rejectlog_inode = 0;
}
- }
/* Open the file if necessary, and write the data */
if (fstat(rejectlogfd, &statbuf) >= 0) rejectlog_inode = statbuf.st_ino;
}
- written_len = write_to_fd_buf(rejectlogfd, log_buffer, length);
- if (written_len != length)
+ written_len = write_to_fd_buf(rejectlogfd, g->s, g->ptr);
+ if (written_len != g->ptr)
{
- log_write_failed(US"reject log", length, written_len);
+ log_write_failed(US"reject log", g->ptr, written_len);
/* That function does not return */
}
}
attempt to write to the system log as a last-ditch try at telling somebody. In
all cases except mua_wrapper, try to write to log_stderr. */
-if ((flags & LOG_PANIC) != 0)
+if (flags & LOG_PANIC)
{
- if (log_stderr != NULL && log_stderr != debug_file && !mua_wrapper)
- fprintf(log_stderr, "%s", CS log_buffer);
+ if (log_stderr && log_stderr != debug_file && !mua_wrapper)
+ fprintf(log_stderr, "%s", CS string_from_gstring(g));
- if ((logging_mode & LOG_MODE_SYSLOG) != 0)
+ if (logging_mode & LOG_MODE_SYSLOG)
write_syslog(LOG_ALERT, log_buffer);
/* If this panic logging was caused by a failure to open the main log,
the original log line is in panic_save_buffer. Make an attempt to write it. */
- if ((logging_mode & LOG_MODE_FILE) != 0)
+ if (logging_mode & LOG_MODE_FILE)
{
panic_recurseflag = TRUE;
open_log(&paniclogfd, lt_panic, NULL); /* Won't return on failure */
panic_recurseflag = FALSE;
- if (panic_save_buffer != NULL)
+ if (panic_save_buffer)
{
int i = write(paniclogfd, panic_save_buffer, Ustrlen(panic_save_buffer));
i = i; /* compiler quietening */
}
- written_len = write_to_fd_buf(paniclogfd, log_buffer, length);
- if (written_len != length)
+ written_len = write_to_fd_buf(paniclogfd, g->s, g->ptr);
+ if (written_len != g->ptr)
{
int save_errno = errno;
write_syslog(LOG_CRIT, log_buffer);
sprintf(CS log_buffer, "write failed on panic log: length=%d result=%d "
- "errno=%d (%s)", length, (int)written_len, save_errno, strerror(save_errno));
- write_syslog(LOG_CRIT, log_buffer);
+ "errno=%d (%s)", g->ptr, (int)written_len, save_errno, strerror(save_errno));
+ write_syslog(LOG_CRIT, string_from_gstring(g));
flags |= LOG_PANIC_DIE;
}
git://git.exim.org / users / jgh / exim.git / blobdiff