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Fix signal race.

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Use strlen() rather than magic number.
Use _PATH_TMP.

Obtained from:	OpenBSD rev 1.13 (sig race) & rev 1.9 (strlen)
This commit is contained in:
David E. O'Brien 2002-04-04 22:15:13 +00:00
parent 7a285819e3
commit 653bbe6003
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=93831
1 changed files with 8 additions and 4 deletions
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12
usr.bin/yacc/main.c
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@ -45,6 +45,7 @@ static char sccsid[] = "@(#)main.c 5.5 (Berkeley) 5/24/93";
__FBSDID("$FreeBSD$");
#endif
#include <paths.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
@ -113,14 +114,16 @@ static void open_files(void);
static void set_signals(void);
static void usage(void);
volatile sig_atomic_t sigdie;
void
__dead2 void
done(k)
int k;
{
if (action_file) { fclose(action_file); unlink(action_file_name); }
if (text_file) { fclose(text_file); unlink(text_file_name); }
if (union_file) { fclose(union_file); unlink(union_file_name); }
if (sigdie) { _exit(k); }
exit(k);
}
@ -129,6 +132,7 @@ static void
onintr(signo)
int signo __unused;
{
sigdie = 1;
done(1);
}
@ -297,11 +301,11 @@ create_file_names()
int i, len;
const char *tmpdir;
tmpdir = getenv("TMPDIR");
if (tmpdir == 0) tmpdir = "/tmp";
if (!(tmpdir = getenv("TMPDIR")))
tmpdir = _PATH_TMP;
len = strlen(tmpdir);
i = len + 17;
i = len + strlen(temp_form) + 1;
if (len && tmpdir[len-1] != '/')
++i;