am 46052913: Better error message

#include <media/ICrypto.h>

#include <stdio.h>

#include <fcntl.h>

#include <signal.h>

#include <getopt.h>

        return 2;

    }

    status_t err = recordScreen(argv[optind]);

    // MediaMuxer tries to create the file in the constructor, but we don't

    // learn about the failure until muxer.start(), which returns a generic

    // error code without logging anything.  We attempt to create the file

    // now for better diagnostics.

    const char* fileName = argv[optind];

    int fd = open(fileName, O_CREAT | O_RDWR, 0644);

    if (fd < 0) {

        fprintf(stderr, "Unable to open '%s': %s\n", fileName, strerror(errno));

        return 1;

    }

    close(fd);

    status_t err = recordScreen(fileName);

    ALOGD(err == NO_ERROR ? "success" : "failed");

    return (int) err;

}