132 lines
2.9 KiB
Text
132 lines
2.9 KiB
Text
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.TH PROTO 2
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.SH NAME
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rdproto \- parse and process a proto file listing
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.SH SYNOPSIS
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.nf
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.ft L
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#include <u.h>
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#include <libc.h>
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#include <disk.h>
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.ft
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.PP
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.B
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typedef void Protoenum(char *new, char *old, Dir *d, void *a)
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.PP
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.B
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typedef void Protowarn(char *msg, void *a)
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.PP
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.B
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int rdproto(char *proto, char *root, Protoenum *enm,
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.br
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.B
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Protowarn *warn, void *a)
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.SH DESCRIPTION
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.I Rdproto
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reads and interprets the named
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.I proto
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file relative to the
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root directory
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.IR root .
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.PP
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Each line of the
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.I proto
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file specifies a file to copy.
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Blank lines and lines beginning with
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.B #
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are ignored.
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Indentation (usually tabs) is significant,
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with each level of indentation corresponding to a level in the file tree.
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Fields within a line are separated by white space.
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The first field is the last path element in the destination file tree.
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The second field specifies the permissions.
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The third field is the owner of the file,
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and the fourth is the group owning the file.
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The fifth field is the name of the file from which to copy;
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this file is read from the current name space,
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not the source file tree.
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All fields except the first are optional.
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Specifying
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.B -
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for permissions, owner, or group
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causes
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.I rdproto
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to fetch the corresponding information
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from the file rather than override it.
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(This is the default behavior when the fields
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are not present; explicitly specifying
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.B -
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is useful when one wishes to set, say,
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the file owner without setting the permissions.)
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.PP
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Names beginning with a
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.L $
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are expanded as environment variables.
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If the first file specified in a directory is
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.LR * ,
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all of the files in that directory are considered listed.
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If the first file is
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.LR + ,
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all of the files are copied, and all subdirectories
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are recursively considered listed.
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All files are considered relative to
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.IR root .
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.PP
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For each file named by the
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.IR proto ,
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.I enm
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is called with
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.I new
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pointing at the name of the file (without the root prefix),
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.I old
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pointing at the name of the source file (with the root prefix,
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when applicable),
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and
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.I Dir
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at the desired directory information for the new file.
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Only the
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.BR name ,
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.BR uid ,
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.BR gid ,
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.BR mode ,
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.BR mtime ,
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and
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.B length
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fields are guaranteed to be valid.
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The argument
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.I a
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is the same argument passed to
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.IR rdproto ;
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typically it points at some extra state
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used by the enumeration function.
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.PP
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When files or directories do not exist or
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cannot be read by
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.IR rdproto ,
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it formats a warning message, calls
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.IR warn ,
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and continues processing;
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if
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.I warn
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is nil,
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.I rdproto
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prints the warning message to standard error.
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.PP
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.I Rdproto
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returns zero
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if
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.I proto
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was processed, \-1 if it could not be opened.
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.SH FILES
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.TF /sys/lib/sysconfig/proto/portproto
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.TP
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.B /sys/lib/sysconfig/proto/
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directory of prototype files.
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.TP
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.B /sys/lib/sysconfig/proto/portproto
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generic prototype file.
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.SH SOURCE
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.B /sys/src/libdisk/proto.c
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.SH SEE ALSO
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.IR mk9660 (8),
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.IR mkfs (8)
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