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SunOS man pages : mcs (1)

User Commands                                              mcs(1)

NAME

mcs - manipulate the comment section of an object file

SYNOPSIS

mcs { -c | -d | -p | -V | -a string | -n name } ... file ...

DESCRIPTION

The mcs command is used to manipulate a section, by default the .comment section, in an ELF object file. It is used to add to, delete, print, and compress the contents of a sec- tion in an ELF object file, and print only the contents of a section in a COFF object file. mcs cannot add, delete or compress the contents of a section that is contained within a segment. If the input file is an archive (see ar(3HEAD)), the archive is treated as a set of individual files. For example, if the -a option is specified, the string is appended to the comment section of each ELF object file in the archive; if the archive member is not an ELF object file, then it is left unchanged. mcs must be given one or more of the options described below. It applies, in order, each of the specified options to each file.

OPTIONS

-a string Append string to the comment section of the ELF object files. If string contains embedded blanks, it must be enclosed in quotation marks. -c Compress the contents of the comment section of the ELF object files. All duplicate entries are removed. The ordering of the remaining entries is not dis- turbed. -d Delete the contents of the comment section from the ELF object files. The section header for the comment section is also removed. -n name Specify the name of the comment section to access if other than .comment. By default, mcs deals with the section named .comment. This option can be used to specify another section. mcs can take multiple -n options to allow for specification of multiple sec- tion comments. -p Print the contents of the comment section on the stan- dard output. Each section printed is tagged by the SunOS 5.8 Last change: 11 Jan 1996 1 User Commands mcs(1) name of the file from which it was extracted, using the format file[member_name]: for archive files and file: for other files. -V Print on standard error the version number of mcs.

EXAMPLES

Example 1: Printing a file's comment section The following entry example% mcs -p elf.file prints the comment section of the file elf.file. Example 2: Appending a string to a comment section The following entry example% mcs -a xyz elf.file appends string xyz to elf.file's comment section.

FILES

/tmp/mcs* temporary files

ATTRIBUTES

See attributes(5) for descriptions of the following attri- butes: ____________________________________________________________ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | |_____________________________|_____________________________| | Availability | SUNWbtool | |_____________________________|_____________________________|

SEE ALSO

ar(1), as(1), ld(1), elf(3ELF), tmpnam(3C), a.out(4), ar(3HEAD), attributes(5)

NOTES

When mcs deletes a section using the -d option, it tries to bind together sections of type SHT_REL and target sections pointed to by the sh_info section header field. If one is to be deleted, mcs attempts to delete the other of the pair. SunOS 5.8 Last change: 11 Jan 1996 2