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save errno in sys_error()

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the print functions prior to perror() might otherwise clobber it.
This commit is contained in:
Oswald Buddenhagen 2021-01-01 14:46:31 +01:00
parent 6e56f39fa9
commit e295f483d9
1 changed files with 3 additions and 0 deletions
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3
src/util.c
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@ -27,6 +27,7 @@
#include <stdlib.h> #include <stdlib.h>
#include <unistd.h> #include <unistd.h>
#include <fcntl.h> #include <fcntl.h>
#include <errno.h>
#include <string.h> #include <string.h>
#include <ctype.h> #include <ctype.h>
#include <pwd.h> #include <pwd.h>
@ -154,9 +155,11 @@ vsys_error( const char *msg, va_list va )
{ {
char buf[1024]; char buf[1024];
int errno_bak = errno;
flushn(); flushn();
if ((uint)vsnprintf( buf, sizeof(buf), msg, va ) >= sizeof(buf)) if ((uint)vsnprintf( buf, sizeof(buf), msg, va ) >= sizeof(buf))
oob(); oob();
errno = errno_bak;
perror( buf ); perror( buf );
} }