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Modify gen_init_cpio so that lines that specify files can contain
what looks like a shell variable that's expanded during processing.
For example:
file /sbin/kinit ${RFS_BASE}/usr/src/klibc/kinit/kinit 0755 0 0
given RFS_BASE is "/some/directory" in the environment
would be expanded to
file /sbin/kinit /some/directory/usr/src/klibc/kinit/kinit 0755 0 0
If several environment variables appear in a line, they are all expanded
with processing happening from left to right.
Undefined variables expand to a null string.
Syntax errors stop processing, letting the existing error handling
show the user offending line.
This patch helps embedded folks who frequently create several
RFS directories and then switch between them as they're tuning
an initramfs.
Signed-off-by: gene.sally@timesys.com
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
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Treat an argument of "-" as meaning "read stdin for cpio files" so
gen_init_cpio can be piped into.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
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Extend usr/gen_init_cpio.c "file" entry, adding support for hard links.
Previous format:
file <name> <location> <mode> <uid> <gid>
New format:
file <name> <location> <mode> <uid> <gid> [<hard links>]
The hard links specification is optional, keeping the previous
behaviour.
All hard links are defined sequentially in the resulting cpio and the
file data is present only in the last link. This is the behaviour of
GNU's cpio and is supported by the kernel initramfs extractor.
Signed-off-by: Luciano Rocha <strange@nsk.no-ip.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Fix potential NULL pointer deref in gen_init_cpio.c spotted by coverity
checker. This fixes coverity bug #86
Without this patch we risk dereferencing a NULL `type' in the
"if ('\n' == *type) {" line.
Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
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