1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
/*
* Copyright (c) 1997-2001 Silicon Graphics, Inc. All Rights Reserved.
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <pcp/pmapi.h>
#include <pcp/impl.h>
int
main(int argc, char *argv[])
{
int sts;
FILE *f;
FILE *fout;
int fd;
int nextfd;
close(3); /* some stdio versions start with this open */
close(4); /* some stdio versions start with this open */
fd = atoi(argv[1]);
if (fd == 1) fout = stdout;
else if (fd == 2) fout = stderr;
else fout = fopen("/tmp/chk.fout", "w");
if (fout == NULL) {
fprintf(stderr, "chkopenlog: botched open ... fd=%d\n", fd);
sts = system("ls -l /tmp/chk.fout");
exit(sts == 0 ? 1 : sts);
}
fprintf(fout, "This message on oldstream before __pmOpenLog() called\n");
#define whatis(f) (f == (stderr) ? " (stderr)" : (f == (stdout) ? " (stdout)" : (f == NULL ? " (NULL)" : "")))
nextfd = open("/dev/null", 0);
if (nextfd < 0) {
fprintf(stderr, "chkopenlog: failed /dev/null open\n");
exit(2);
}
fprintf(stderr, "Starting with oldstream%s fd=%d, nextfd=%d\n", whatis(fout), fileno(fout), nextfd);
close(nextfd);
nextfd = open("/dev/null", 0);
f = __pmOpenLog("chkopenlog", argv[2], fout, &sts);
fprintf(stderr, "__pmOpenLog -> sts=%d, log %s newstream%s fd=%d, nextfd=%d\n",
sts, argv[2], whatis(f), f != NULL ? fileno(f) : -1, nextfd);
if (f != NULL)
fprintf(f, "[a helpful little message]\n");
exit(0);
}
|
