tree 47023c8db5a3c49ee6061e6c07a6566feed0f24a
parent 79af3c6d6ab288982b7f140663a7ad17619e8802
author Tom Cherry <tomcherry@google.com> 1491000453 -0700
committer Wei Wang <wvw@google.com> 1492619948 +0000

init: Use std::string for write_file()

The content parameter of write_file() previously took a char* that was
then converted to a std::string in WriteStringToFd().  One unfortunate
effect of this, is that it is impossible to write data that contains
'\0' within it, as the new string will only contain characters up
until the '\0'.

This changes write_file() to take an std::string, such that
std::string::size() is used to determine the length of the string,
allowing it to contain null characters.

Also change the path parameter of read_file() and write_file() for
consistency.

Lastly, add a test for handling strings with '\0' in them.

Bug: 36726045
Bug: 36576280
Test: Boot bullhead, run unit tests
Change-Id: Idad60e4228ee2de741ab3ab6a4917065b5e63cd8
(cherry picked from commit 53089aa25ca9707e22e45e862f794bfc958d302a)