[PATCH v1] tests: getcwd.test
Jay Joshi
jay.r.joshi100 at gmail.com
Fri Mar 18 04:44:26 UTC 2016
On Thu, Mar 17, 2016 at 1:23 PM, Jay Joshi <jay.r.joshi100 at gmail.com> wrote:
> On Thu, Mar 17, 2016 at 7:49 AM, Dmitry V. Levin <ldv at altlinux.org> wrote:
>>
>> On Tue, Mar 15, 2016 at 05:06:48PM +0530, Jay Joshi wrote:
>> > >From 5e543e3a0ae730b1833c8a4d5d9a5bf28273256d Mon Sep 17 00:00:00 2001
>> > From: JayRJoshi <jay.r.joshi100 at gmail.com>
>> > Date: Tue, 15 Mar 2016 16:41:39 +0530
>> > Subject: [PATCH] Test for getcwd (getcwd.c, getcwd.expected,
>> > getcwd.test)
>> > added
>>
>> This commit message doesn't follow our guidelines.
>> It might be a good idea to run "git log -- tests" and see how commit
>> messages for tests usually look like.
>>
>> > --- /dev/null
>> > +++ b/tests/getcwd.c
>> > @@ -0,0 +1,36 @@
>> > +#include "tests.h"
>> > +
>> > +#include <sys/stat.h>
>> > +#include <stdio.h>
>> > +#include <unistd.h>
>> > +#include <errno.h>
>> > +
>> > +
>> > +int
>> > +main(void)
>> > +{
>> > + char cur_dir[32];
>> > +
>> > + if (mkdir("/tmp/sample_dir", S_IRWXU) == -1)
>> > + perror_msg_and_skip("mkdir");
>>
>> Why do you want to use /tmp in the first place?
>> Please avoid /tmp if possible, it's unreliable.
>>
>> > + if (chdir("/tmp/sample_dir") == -1)
>> > + perror_msg_and_skip("chdir");
>> > +
>> > + if (getcwd(cur_dir, sizeof(cur_dir)) != NULL) {
>> > + printf("getcwd(\"/tmp/sample_dir\", 32) = 16\n");
>>
>> Now that you use /tmp, imagine that /tmp is a symlink to another
>> directory. In that case getcwd would return something different from your
>> expectations.
>
>
> Actually, I wanted to avoid using regexp for directory path. Also, /tmp was
> by default (and usually) is given all rwx permissions for all users.
> Although, I do agree with your point.
>
>>
>> > + } else {
>> > + perror_msg_and_fail("getcwd");
>> > + }
>> > +
>> > + if (rmdir(cur_dir) == -1)
>> > + perror_msg_and_skip("rmdir");
>> > +
>> > + if (getcwd(cur_dir, sizeof(cur_dir)) != NULL) {
>> > + printf("getcwd(\"/tmp/sample_dir\", 32) = 16\n");
>> > + } else {
>> > + printf("getcwd(\"0x0123456789ab, 32) = -1 ENOENT (%m)\n");
>>
>> Why this magic number?
>>
>> > --- /dev/null
>> > +++ b/tests/getcwd.expected
>> > @@ -0,0 +1,2 @@
>> > +getcwd\(\"/tmp/sample_dir\", 32\) += 16
>> > +getcwd\(0x[0-9a-f]+, 32\) += -1 ENOENT \(No such file or directory\)
>>
>> Looks like you've got confused. If you have getcwd.expected, then
>> getcwd.c doesn't have to print anything. If your getcwd.c prints expected
>> output, then you don't need getcwd.expected. In other words, you need
>> only one of two types of expected output, not both.
>>
>> > diff --git a/tests/getcwd.test b/tests/getcwd.test
>> > new file mode 100755
>> > index 0000000..03fabb1
>> > --- /dev/null
>> > +++ b/tests/getcwd.test
>> > @@ -0,0 +1,9 @@
>> > +#!/bin/sh
>> > +
>> > +. "${srcdir=.}/init.sh"
>> > +
>> > +run_prog > /dev/null
>> > +run_strace -egetcwd $args
>> > +match_grep
>>
>> Here your match_grep uses getcwd.expected, so the output produced by
>> getcwd.c is ignored.
>>
>> I generally prefer match_diff to match_grep because the former is exact
>> comparison and therefore the check is more robust.
>>
>
> I wanted to cover test for error condition ENOENT, I couldn't think of any
> way to check it using match_diff. Is it possible?
> Updated patch is pasted below. I'm using regexp for directories. As, no
> nested regexp is used, I don't think performance will be concern.
>
> From 27c04f259a56c2990511ab171ddbb283f0810b95 Mon Sep 17 00:00:00 2001
> From: JayRJoshi <jay.r.joshi100 at gmail.com>
> Date: Tue, 15 Mar 2016 16:41:39 +0530
> Subject: [PATCH] tests: add getcwd.test
>
> ---
> tests/.gitignore | 1 +
> tests/Makefile.am | 2 ++
> tests/getcwd.c | 30 ++++++++++++++++++++++++++++++
> tests/getcwd.expected | 2 ++
> tests/getcwd.test | 9 +++++++++
> 5 files changed, 44 insertions(+)
> create mode 100644 tests/getcwd.c
> create mode 100644 tests/getcwd.expected
> create mode 100755 tests/getcwd.test
>
> diff --git a/tests/.gitignore b/tests/.gitignore
> index b89796a..52eb76d 100644
> --- a/tests/.gitignore
> +++ b/tests/.gitignore
> @@ -41,6 +41,7 @@ fstat64
> fstatat64
> ftruncate
> ftruncate64
> +getcwd
> getdents
> getdents64
> getrandom
> diff --git a/tests/Makefile.am b/tests/Makefile.am
> index 59e7e78..81ad778 100644
> --- a/tests/Makefile.am
> +++ b/tests/Makefile.am
> @@ -91,6 +91,7 @@ check_PROGRAMS = \
> fstatat64 \
> ftruncate \
> ftruncate64 \
> + getcwd \
> getdents \
> getdents64 \
> getrandom \
> @@ -264,6 +265,7 @@ TESTS = \
> fstatat64.test \
> ftruncate.test \
> ftruncate64.test \
> + getcwd.test \
> getdents.test \
> getdents64.test \
> getrandom.test \
> diff --git a/tests/getcwd.c b/tests/getcwd.c
> new file mode 100644
> index 0000000..561a4f1
> --- /dev/null
> +++ b/tests/getcwd.c
> @@ -0,0 +1,30 @@
> +#include "tests.h"
> +
> +#include <sys/stat.h>
> +#include <stdio.h>
> +#include <unistd.h>
> +#include <errno.h>
> +
> +#define sample_dir "getcwd.sample_dir"
> +#define path_size 2048
> +int
> +main(void)
> +{
> + char cur_dir[path_size];
> +
> + if (mkdir(sample_dir, S_IRWXU) == -1)
> + perror_msg_and_skip("mkdir");
> +
> + if (chdir(sample_dir) == -1)
> + perror_msg_and_skip("chdir");
> +
> + if (getcwd(cur_dir, path_size) == NULL)
> + perror_msg_and_fail("getcwd");
> +
> + if (rmdir(cur_dir) == -1)
> + perror_msg_and_skip("rmdir");
> +
> + getcwd(cur_dir, path_size);
> +
> + return 0;
> +}
> diff --git a/tests/getcwd.expected b/tests/getcwd.expected
> new file mode 100644
> index 0000000..301c8ac
> --- /dev/null
> +++ b/tests/getcwd.expected
> @@ -0,0 +1,2 @@
> +getcwd\(\"[^\0]+"\, 2048\) += [0-9]+
> +getcwd\(0x[0-9a-f]+, 2048\) += -1 ENOENT \(No such file or directory\)
> diff --git a/tests/getcwd.test b/tests/getcwd.test
> new file mode 100755
> index 0000000..03fabb1
> --- /dev/null
> +++ b/tests/getcwd.test
> @@ -0,0 +1,9 @@
> +#!/bin/sh
> +
> +. "${srcdir=.}/init.sh"
> +
> +run_prog > /dev/null
> +run_strace -egetcwd $args
> +match_grep
> +
> +exit 0
> --
> 1.9.1
Ignore my previous patch.
Below patch is using match diff. Let me know if any changes are
required. Thanks.
>From 6785e2dc6f15104537d2e27387279a04c9bcfb25 Mon Sep 17 00:00:00 2001
From: JayRJoshi <jay.r.joshi100 at gmail.com>
Date: Tue, 15 Mar 2016 16:41:39 +0530
Subject: [PATCH] tests: add getcwd.test
---
tests/.gitignore | 1 +
tests/Makefile.am | 2 ++
tests/getcwd.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
tests/getcwd.test | 11 +++++++++++
4 files changed, 64 insertions(+)
create mode 100644 tests/getcwd.c
create mode 100755 tests/getcwd.test
diff --git a/tests/.gitignore b/tests/.gitignore
index b89796a..52eb76d 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -41,6 +41,7 @@ fstat64
fstatat64
ftruncate
ftruncate64
+getcwd
getdents
getdents64
getrandom
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 59e7e78..81ad778 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -91,6 +91,7 @@ check_PROGRAMS = \
fstatat64 \
ftruncate \
ftruncate64 \
+ getcwd \
getdents \
getdents64 \
getrandom \
@@ -264,6 +265,7 @@ TESTS = \
fstatat64.test \
ftruncate.test \
ftruncate64.test \
+ getcwd.test \
getdents.test \
getdents64.test \
getrandom.test \
diff --git a/tests/getcwd.c b/tests/getcwd.c
new file mode 100644
index 0000000..e69e85b
--- /dev/null
+++ b/tests/getcwd.c
@@ -0,0 +1,50 @@
+#include "tests.h"
+
+#include <sys/stat.h>
+#include <sys/syscall.h>
+
+#ifdef __NR_getcwd
+
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+
+#define sample_dir "getcwd.sample_dir"
+
+int
+main(void)
+{
+ long res;
+ char cur_dir[2048];
+
+ if (mkdir(sample_dir, S_IRWXU))
+ perror_msg_and_fail("mkdir");
+
+ if (chdir(sample_dir))
+ perror_msg_and_skip("chdir");
+
+ res = syscall(__NR_getcwd, cur_dir, sizeof(cur_dir));
+
+ if (res != 0) {
+ printf("getcwd(\"%s\", %zu) = %ld\n", cur_dir, sizeof(cur_dir), res);
+ } else {
+ perror_msg_and_fail("getcwd");
+ }
+
+ if (rmdir(cur_dir))
+ perror_msg_and_fail("rmdir");
+
+ syscall(__NR_getcwd, cur_dir, sizeof(cur_dir));
+
+ printf("getcwd(%p, %zu) = -1 ENOENT (%m)\n", cur_dir, sizeof(cur_dir));
+
+ puts("+++ exited with 0 +++");
+
+ return 0;
+}
+
+#else
+
+SKIP_MAIN_UNDEFINED("__NR_getcwd");
+
+#endif
diff --git a/tests/getcwd.test b/tests/getcwd.test
new file mode 100755
index 0000000..c744c0e
--- /dev/null
+++ b/tests/getcwd.test
@@ -0,0 +1,11 @@
+#!/bin/sh
+
+. "${srcdir=.}/init.sh"
+
+run_prog > /dev/null
+OUT="$LOG.out"
+run_strace -egetcwd -a18 $args > $OUT
+match_diff "$LOG" "$OUT"
+rm -f "$OUT"
+
+exit 0
--
1.9.1
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