Question

在从Web调用的PHP代码中，此代码未运行。但它通常在CLI上运行。 sh文件的chmod是777。

$c = shell_exec('printf "{$res}" | ./new-openvpn-client.sh {$user}');

Answer 1

如另一个答案中所述，单引号字符串不会解析变量，因此您需要使用双引号。但是，您还需要确保正确引用和清除了外部命令的参数。 Use escapeshellarg() for that.

float cross(Vec2f const &edge1, Vec2f const &edge2)
{
    return edge1[0] * edge2[1] - edge1[1] * edge2[0];
}

bool caculateBarycentricWeights(float invDoubleTriArea, float doubleTriArea, Vec2f const (&edgesFromTo01_12_20)[3], Vec2f const (&vertex)[3], Vec2f const &point, float(&outWeight)[3])
{
    outWeight[0] = cross(point - vertex[2], edgesFromTo01_12_20[1]);
    outWeight[1] = cross(point - vertex[0], edgesFromTo01_12_20[2]);
    outWeight[2] = cross(point - vertex[1], edgesFromTo01_12_20[0]);

    if (outWeight[0] >= 0.0f &&  outWeight[1] >= 0.0f &&  outWeight[2] >= 0.0f
        && outWeight[0] + outWeight[1] + outWeight[2] <= doubleTriArea * 1.000001f)
    {
        outWeight[0] *= invDoubleTriArea;
        outWeight[1] *= invDoubleTriArea;
        outWeight[2] *= invDoubleTriArea;

        return true;
    }
    else
    {
        return false;
    }
}

void rasterize(Vec3f const &vertex0, Vec3f const &vertex1, Vec3f const &vertex2, vector<Vec3f> &dstBuffer)
{
    Vec2f const edgesFromTo01_12_20[3] =
    {
        Vec2f(vertex1[0] - vertex0[0], vertex1[1] - vertex0[1]),
        Vec2f(vertex2[0] - vertex1[0], vertex2[1] - vertex1[1]),
        Vec2f(vertex0[0] - vertex2[0], vertex0[1] - vertex2[1])
    };

    //in viewport space up and down is switched, thats why '-'
    float const doubleTriangleArea = -cross(edgesFromTo01_12_20[0], edgesFromTo01_12_20[1]);
    float const invDoubleTriangleArea = 1.0f / doubleTriangleArea;


    float weight[3];

    float invZ[3] = { 1.0f / vertex0[2], 1.0f / vertex1[2], 1.0f / vertex2[2] };

    Vec2f p(vertex0[0], vertex0[1]);

    Vec2f vPos[3] = {
        Vec2f(vertex0[0], vertex0[1]),
        Vec2f(vertex1[0], vertex1[1]),
        Vec2f(vertex2[0], vertex2[1])
    };

    const size_t RES_X = 1024;
    const size_t RES_Y = 768;

    for (size_t y = 0; y < RES_Y; ++y)
    {
        p[1] = y;

        for (size_t x = 0; x < RES_X; ++x)
        {
            p[0] = x;

            if (caculateBarycentricWeights(invDoubleTriangleArea, doubleTriangleArea, edgesFromTo01_12_20, vPos, p, weight))
            {
                //interpolate values
                float z = 1.0f / (weight[0] * invZ[0] + weight[1] * invZ[1] + weight[2] * invZ[2]);
                dstBuffer[y * RES_X + x] = ((vertex0 * (weight[0] * invZ[0])) + (vertex1 * (weight[1] * invZ[1])) + (vertex2 * (weight[2] * invZ[2]))) * z;

            }
        }
    }
}


int main(int argc, char *argv[])
{   
    vector<Vec3f> buffer;
    buffer.resize(1024 * 768);

    high_resolution_clock::time_point start = high_resolution_clock::now();
    size_t fps = 0;

    while (true) 
    {

        static Vec3f v0 = { -2000.0f, -2000.0, 10.0 };
        static Vec3f v1 = { 2000.0f, -2000.0, 10.0 };
        static Vec3f v2 = { 0.0f, 2000.0, 10.0 };

        rasterize(v0, v2, v1, buffer);
        ++fps;

        high_resolution_clock::time_point now = high_resolution_clock::now();
        auto timeDiff = duration_cast<microseconds>(now - start).count();

        static const long oneSecond = 1000000;
        if (timeDiff >= oneSecond)
        {

            cout << fps << " ";

            fps = 0;
            start = now;
        }

    }


    return 0;
}

$res = escapeshellarg($res); $user = escapeshellarg($user); $c = shell_exec("printf $res | ./new-openvpn-client.sh $user");不太可能正确解决。将脚本放在./new-openvpn-client.sh之类的合理位置，并在命令中提供完整路径。

Answer 2

这是应用程序可执行文件的权限问题。我已经通过给予apache用户真正的权限来解决。

PHP shell_exec没有运行

2 个答案: