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authorguenther <>2010-02-11 07:35:38 +0000
committerguenther <>2010-02-11 07:35:38 +0000
commit53dc25964d1d5f5dffbf61f764b63a30be5f8947 (patch)
tree39704368cdd08a910db69863f93408adeda6b894 /src/regress/lib
parent2f8099199567a7110e7f8796aa42725ee02c3228 (diff)
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Add a regression suite for mkstemp(), verifying that it neither overruns
no underruns the supplied template buffer, that it can generate names that don't contain any X's, and that all open() calls that pass O_CREAT also pass O_EXCL
Diffstat (limited to 'src/regress/lib')
-rw-r--r--src/regress/lib/libc/Makefile4
-rw-r--r--src/regress/lib/libc/mkstemp/Makefile19
-rw-r--r--src/regress/lib/libc/mkstemp/mkstemp_test.c95
3 files changed, 116 insertions, 2 deletions
diff --git a/src/regress/lib/libc/Makefile b/src/regress/lib/libc/Makefile
index 3c24e3f634..ddbb9505fe 100644
--- a/src/regress/lib/libc/Makefile
+++ b/src/regress/lib/libc/Makefile
@@ -1,10 +1,10 @@
1# $OpenBSD: Makefile,v 1.30 2009/11/21 09:56:10 guenther Exp $ 1# $OpenBSD: Makefile,v 1.31 2010/02/11 07:35:38 guenther Exp $
2 2
3SUBDIR+= _setjmp alloca atexit basename cxa-atexit db dirname fnmatch 3SUBDIR+= _setjmp alloca atexit basename cxa-atexit db dirname fnmatch
4SUBDIR+= fpclassify getaddrinfo getcap getopt_long glob hsearch longjmp 4SUBDIR+= fpclassify getaddrinfo getcap getopt_long glob hsearch longjmp
5SUBDIR+= locale malloc netdb popen printf regex setjmp setjmp-signal 5SUBDIR+= locale malloc netdb popen printf regex setjmp setjmp-signal
6SUBDIR+= sigreturn sigsetjmp sprintf strerror strtod strtonum telldir time vis 6SUBDIR+= sigreturn sigsetjmp sprintf strerror strtod strtonum telldir time vis
7SUBDIR+= orientation stdio_threading 7SUBDIR+= orientation stdio_threading mkstemp
8 8
9.if (${MACHINE_ARCH} != "vax") 9.if (${MACHINE_ARCH} != "vax")
10SUBDIR+= ieeefp 10SUBDIR+= ieeefp
diff --git a/src/regress/lib/libc/mkstemp/Makefile b/src/regress/lib/libc/mkstemp/Makefile
new file mode 100644
index 0000000000..dc7eb281a9
--- /dev/null
+++ b/src/regress/lib/libc/mkstemp/Makefile
@@ -0,0 +1,19 @@
1# $OpenBSD: Makefile,v 1.1 2010/02/11 07:35:38 guenther Exp $
2
3PROG=mkstemp_test
4CLEANFILES+= ; rm -rf output
5
6O = output
7
8# The ktrace/kdump/perl combo verifies that all open() calls that
9# were passed O_CREAT were also passed O_EXCL
10run-regress-${PROG}: ${PROG}
11 mkdir -p $O && cd $O && ktrace ../${PROG}
12 cd $O && kdump | perl -mFcntl -nl \
13 -e '/ open\([^,]*,([^,]+)/ or next;' \
14 -e '$$f = oct($$1);' \
15 -e 'if ($$f & O_CREAT && !($$f & O_EXCL)) {' \
16 -e ' print "FAIL"; exit 1' \
17 -e '}'
18
19.include <bsd.regress.mk>
diff --git a/src/regress/lib/libc/mkstemp/mkstemp_test.c b/src/regress/lib/libc/mkstemp/mkstemp_test.c
new file mode 100644
index 0000000000..d8311cbf35
--- /dev/null
+++ b/src/regress/lib/libc/mkstemp/mkstemp_test.c
@@ -0,0 +1,95 @@
1/*
2 * Copyright (c) 2010 Philip Guenther <guenther@openbsd.org>
3 *
4 * Public domain.
5 *
6 * Verify that mkstemp() doesn't overrun or underrun the template buffer
7 * and that it can generate names that don't contain any X's
8 */
9
10#include <sys/param.h>
11
12#include <err.h>
13#include <stdio.h>
14#include <stdlib.h>
15#include <string.h>
16#include <sys/mman.h>
17#include <sys/stat.h>
18#include <unistd.h>
19
20#define MAX_TEMPLATE_LEN 10
21#define MAX_TRIES 100
22
23long pg;
24
25void
26try(char *p, const char *prefix, int len)
27{
28 struct stat sb, fsb;
29 char *q;
30 size_t plen = strlen(prefix);
31 int tries, fd;
32
33 for (tries = 0; tries < MAX_TRIES; tries++) {
34 memcpy(p, prefix, plen);
35 memset(p + plen, 'X', len);
36 p[plen + len] = '\0';
37 fd = mkstemp(p);
38 if (fd < 0)
39 err(1, "mkstemp");
40 if (stat(p, &sb))
41 err(1, "stat(%s)", p);
42 if (fstat(fd, &fsb))
43 err(1, "fstat(%d==%s)", fd, p);
44 if (sb.st_dev != fsb.st_dev || sb.st_ino != fsb.st_ino)
45 errx(1, "stat mismatch");
46 close(fd);
47 for (q = p + plen; *q != 'X'; q++) {
48 if (*q == '\0') {
49 if (q != p + plen + len)
50 errx(1, "unexpected truncation");
51 return;
52 }
53 }
54 if (q >= p + plen + len)
55 errx(1, "overrun?");
56 }
57 errx(1, "exceeded MAX_TRIES");
58}
59
60int
61main(void)
62{
63 struct stat sb, fsb;
64 char cwd[MAXPATHLEN + 1];
65 char *p;
66 size_t clen;
67 int i;
68
69 pg = sysconf(_SC_PAGESIZE);
70 if (getcwd(cwd, sizeof cwd - 1) == NULL)
71 err(1, "getcwd");
72 clen = strlen(cwd);
73 cwd[clen++] = '/';
74 cwd[clen] = '\0';
75 p = mmap(NULL, pg * 3, PROT_READ | PROT_WRITE, MAP_ANON, -1, 0);
76 if (p == NULL)
77 err(1, "mmap");
78 if (mprotect(p, pg, PROT_NONE) || mprotect(p + pg * 2, pg, PROT_NONE))
79 err(1, "mprotect");
80 p += pg;
81
82 i = MAX_TEMPLATE_LEN + 1;
83 while (i-- > 1) {
84 /* try first at the start of a page, no prefix */
85 try(p, "", i);
86 /* now at the end of the page, no prefix */
87 try(p + pg - i - 1, "", i);
88 /* start of the page, prefixed with the cwd */
89 try(p, cwd, i);
90 /* how about at the end of the page, prefixed with cwd? */
91 try(p + pg - i - 1 - clen, cwd, i);
92 }
93
94 return 0;
95}