diff options
Diffstat (limited to 'usertests.c')
| -rw-r--r-- | usertests.c | 28 |
1 files changed, 20 insertions, 8 deletions
diff --git a/usertests.c b/usertests.c index 655610c..62ce8d7 100644 --- a/usertests.c +++ b/usertests.c @@ -1508,30 +1508,41 @@ bsstest(void) printf(stdout, "bss test ok\n"); } -// does exec do something sensible if the arguments -// are larger than a page? +// does exec return an error if the arguments +// are larger than a page? or does it write +// below the stack and wreck the instructions/data? void bigargtest(void) { - int pid, ppid; + int pid, ppid, fd; + unlink("bigarg-ok"); ppid = getpid(); pid = fork(); if(pid == 0){ - char *args[32+1]; + static char *args[MAXARG]; int i; - for(i = 0; i < 32; i++) - args[i] = "bigargs test: failed\n "; - args[32] = 0; - printf(stdout, "bigarg test\n"); + for(i = 0; i < MAXARG-1; i++) + args[i] = "bigargs test: failed\n "; + args[MAXARG-1] = 0; + printf(stdout, "bigarg test %d\n", (MAXARG-1)*strlen(args[0])); exec("echo", args); printf(stdout, "bigarg test ok\n"); + fd = open("bigarg-ok", O_CREATE); + close(fd); exit(); } else if(pid < 0){ printf(stdout, "bigargtest: fork failed\n"); exit(); } wait(); + fd = open("bigarg-ok", 0); + if(fd < 0){ + printf(stdout, "bigarg test failed!\n"); + exit(); + } + close(fd); + unlink("bigarg-ok"); } // what happens when the file system runs out of blocks? @@ -1606,6 +1617,7 @@ main(int argc, char *argv[]) } close(open("usertests.ran", O_CREATE)); + bigargtest(); bigwrite(); bigargtest(); bsstest(); |