godzil/ack
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

changed system-calls to avoid namespace pollution

Browse Source
This commit is contained in:
eck
1990-01-22 13:00:13 +00:00
parent a816b64b86
commit 0ab62357ce
4 changed files with 18 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
lang/cem/libcc.ansi/stdlib/system.c
View File

@@ -7,11 +7,11 @@
#include <stdlib.h>
#include <signal.h>
extern int fork(void);
extern int wait(int *);
extern int _fork(void);
extern int _wait(int *);
extern void _exit(int);
extern void execl(char *, ...);
extern void close(int);
extern void _execl(char *, ...);
extern void _close(int);
#define FAIL 127
@@ -21,17 +21,17 @@ system(const char *str)
int pid, exitstatus, waitval;
int i;
if ((pid = fork()) < 0) return str ? -1 : 0;
if ((pid = _fork()) < 0) return str ? -1 : 0;
if (pid == 0) {
for (i = 3; i <= 20; i++)
close(i);
_close(i);
if (!str) str = "cd ."; /* just testing for a shell */
execl("/bin/sh", "sh", "-c", str, (char *) NULL);
_execl("/bin/sh", "sh", "-c", str, (char *) NULL);
/* get here if execl fails ... */
_exit(FAIL); /* see manual page */
}
while ((waitval = wait(&exitstatus)) != pid) {
while ((waitval = _wait(&exitstatus)) != pid) {
if (waitval == -1) break;
}
if (waitval == -1) {