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Replace strlen with strnlen in native code #5510

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Merged
TravisEz13 merged 2 commits into from
Nov 22, 2017
Merged

Replace strlen with strnlen in native code #5510

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c15665b
fix expected vs actual for easier troubleshooting
TravisEz13 Nov 20, 2017
80ba61e
replace strlen calls with strnlen
TravisEz13 Nov 20, 2017
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2 changes: 1 addition & 1 deletion 2 src/libpsl-native/src/followsymlink.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -39,7 +39,7 @@ char* FollowSymLink(const char* fileName)

if (realPath)
{
return strndup(realPath, strlen(realPath) + 1);
return strndup(realPath, strnlen(realPath, PATH_MAX));
}

// if the path wasn't resolved, use readlink
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2 changes: 1 addition & 1 deletion 2 src/libpsl-native/src/getfullyqualifiedname.cpp
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Expand Up @@ -43,7 +43,7 @@ char *GetFullyQualifiedName()
}

// return the first canonical name in the list
fullName = strndup(info->ai_canonname, strlen(info->ai_canonname));
fullName = strndup(info->ai_canonname, strnlen(info->ai_canonname, NI_MAXHOST));

// only free info if getaddrinfo was successful
freeaddrinfo(info);
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4 changes: 2 additions & 2 deletions 4 src/libpsl-native/test/test-createsymlink.cpp
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Expand Up @@ -92,7 +92,7 @@ TEST_F(CreateSymLinkTest, SymLinkToFile)
std::string target = FollowSymLink(fileSymLink.c_str());
char buffer[PATH_MAX];
std::string expected = realpath(file, buffer);
EXPECT_EQ(target, expected);
EXPECT_EQ(expected, target);

@daxian-dbw daxian-dbw Nov 20, 2017

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Can you please explain a bit about why you made the changes to EXPECT_EQ?

@TravisEz13 TravisEz13 Nov 20, 2017

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The pattern for EXPECT_EQ is EXPECT_EQ(<expected>,<actual>) when you call it with the parameters reverse it makes the error very confusing.

}

TEST_F(CreateSymLinkTest, SymLinkToDirectory)
Expand All @@ -103,7 +103,7 @@ TEST_F(CreateSymLinkTest, SymLinkToDirectory)
std::string target = FollowSymLink(dirSymLink.c_str());
char buffer[PATH_MAX];
std::string expected = realpath(dir, buffer);
EXPECT_EQ(target, expected);
EXPECT_EQ(expected, target);
}

TEST_F(CreateSymLinkTest, SymLinkAgain)
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