mirror of
https://github.com/git/git.git
synced 2024-05-23 21:56:10 +02:00
50a6c8efa2
If our size computation overflows size_t, we may allocate a much smaller buffer than we expected and overflow it. It's probably impossible to trigger an overflow in most of these sites in practice, but it is easy enough convert their additions and multiplications into overflow-checking variants. This may be fixing real bugs, and it makes auditing the code easier. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
79 lines
1.4 KiB
C
79 lines
1.4 KiB
C
#include "../../git-compat-util.h"
|
|
|
|
static HANDLE ms_eventlog;
|
|
|
|
void openlog(const char *ident, int logopt, int facility)
|
|
{
|
|
if (ms_eventlog)
|
|
return;
|
|
|
|
ms_eventlog = RegisterEventSourceA(NULL, ident);
|
|
|
|
if (!ms_eventlog)
|
|
warning("RegisterEventSource() failed: %lu", GetLastError());
|
|
}
|
|
|
|
void syslog(int priority, const char *fmt, ...)
|
|
{
|
|
WORD logtype;
|
|
char *str, *pos;
|
|
int str_len;
|
|
va_list ap;
|
|
|
|
if (!ms_eventlog)
|
|
return;
|
|
|
|
va_start(ap, fmt);
|
|
str_len = vsnprintf(NULL, 0, fmt, ap);
|
|
va_end(ap);
|
|
|
|
if (str_len < 0) {
|
|
warning("vsnprintf failed: '%s'", strerror(errno));
|
|
return;
|
|
}
|
|
|
|
str = malloc(st_add(str_len, 1));
|
|
if (!str) {
|
|
warning("malloc failed: '%s'", strerror(errno));
|
|
return;
|
|
}
|
|
|
|
va_start(ap, fmt);
|
|
vsnprintf(str, str_len + 1, fmt, ap);
|
|
va_end(ap);
|
|
|
|
while ((pos = strstr(str, "%1")) != NULL) {
|
|
str = realloc(str, st_add(++str_len, 1));
|
|
if (!str) {
|
|
warning("realloc failed: '%s'", strerror(errno));
|
|
return;
|
|
}
|
|
memmove(pos + 2, pos + 1, strlen(pos));
|
|
pos[1] = ' ';
|
|
}
|
|
|
|
switch (priority) {
|
|
case LOG_EMERG:
|
|
case LOG_ALERT:
|
|
case LOG_CRIT:
|
|
case LOG_ERR:
|
|
logtype = EVENTLOG_ERROR_TYPE;
|
|
break;
|
|
|
|
case LOG_WARNING:
|
|
logtype = EVENTLOG_WARNING_TYPE;
|
|
break;
|
|
|
|
case LOG_NOTICE:
|
|
case LOG_INFO:
|
|
case LOG_DEBUG:
|
|
default:
|
|
logtype = EVENTLOG_INFORMATION_TYPE;
|
|
break;
|
|
}
|
|
|
|
ReportEventA(ms_eventlog, logtype, 0, 0, NULL, 1, 0,
|
|
(const char **)&str, NULL);
|
|
free(str);
|
|
}
|