This is code motion, but I have cleaned up and formalized the
interface between this module and other parts of the library.
Also this adds documentation to the interface.
The current implementation of getumask involves writing a file with
mode 0777 and then testing what mode was created by the kernel. This
doesn't work properly if the user set a per-mount umask (or fmask/
dmask).
This alternative method was suggested by Josh Stone. By forking, we
can use the thread-unsafe method (calling umask) and pass the result
back over a pipe.
This change also fixes another problem: mode_t is unsigned, so cannot
be used to return an error indication (ie. -1). Return a plain int
instead.
Thanks: Josh Stone, Jiri Jaburek, Eric Blake.
Exclude more files from the documented sources in C_SOURCE_FILES:
- sources generated by XDR definitions
- sources generated by gperf
- errnostring.c (generated by the generator, and copied around from src
to daemon during build)
Also update C_SOURCE_FILES as well, so libguestfs builds again from
scratch.
Add the real list of C source files to the Makefile, instead of trying
to calculate it. This (will, in the next commit) fix a problem with
the build on Koji where we created a subdirectory (for python3/) but
the find command picked up files from that directory for the
documentation (and then failed).
This fixes commit 04229c68d6.
