elf_flagelf man page on IRIX

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ELF_FLAG(3E)							  ELF_FLAG(3E)

NAME
     elf_flagdata, elf_flagehdr, elf_flagelf, elf_flagphdr, elf_flagscn,
     elf_flagshdr - manipulate flags

SYNOPSIS
     cc [flag ...] file ...  -lelf [library ...]

     #include <libelf.h>
     unsigned elf_flagdata(Elf_Data *data, Elf_Cmd cmd, unsigned flags);
     unsigned elf_flagehdr(Elf *elf, Elf_Cmd cmd, unsigned flags);
     unsigned elf_flagelf(Elf *elf, Elf_Cmd cmd, unsigned flags);
     unsigned elf_flagphdr(Elf *elf, Elf_Cmd cmd, unsigned flags);
     unsigned elf_flagscn(Elf_Scn *scn, Elf_Cmd cmd, unsigned flags);
     unsigned elf_flagshdr(Elf_Scn *scn, Elf_Cmd cmd, unsigned flags);

DESCRIPTION
     These functions manipulate the flags associated with various structures
     of an ELF file.  Given an ELF descriptor (elf), a data descriptor (data),
     or a section descriptor (scn), the functions may set or clear the
     associated status bits, returning the updated bits.  A null descriptor is
     allowed, to simplify error handling; all functions return zero for this
     degenerate case.

     cmd may have the following values.

     ELF_C_CLR	       The functions clear the bits that are asserted in
		       flags.  Only the non-zero bits in flags are cleared;
		       zero bits do not change the status of the descriptor.

     ELF_C_SET	       The functions set the bits that are asserted in flags.
		       Only the non-zero bits in flags are set; zero bits do
		       not change the status of the descriptor.

     Descriptions of the defined flags bits appear below.

     ELF_F_DIRTY       When the program intends to write an ELF file, this
		       flag asserts the associated information needs to be
		       written to the file.  Thus, for example, a program that
		       wished to update the ELF header of an existing file
		       would call elf_flagehdr with this bit set in flags and
		       cmd equal to ELF_C_SET.	A later call to elf_update
		       would write the marked header to the file.

     ELF_F_LAYOUT      Normally, the library decides how to arrange an output
		       file.  That is, it automatically decides where to place
		       sections, how to align them in the file, etc.  If this
		       bit is set for an ELF descriptor, the program assumes
		       responsibility for determining all file positions.
		       This bit is meaningful only for elf_flagelf and applies

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ELF_FLAG(3E)							  ELF_FLAG(3E)

		       to the entire file associated with the descriptor.

     When a flag bit is set for an item, it affects all the subitems as well.
     Thus, for example, if the program sets the ELF_F_DIRTY bit with
     elf_flagelf, the entire logical file is ``dirty.''

EXAMPLE
     The following fragment shows how one might mark the ELF header to be
     written to the output file.

	  ehdr = elf32_getehdr(elf);
	  /* dirty ehdr ... */
	  elf_flagehdr(elf, ELF_C_SET, ELF_F_DIRTY);

SEE ALSO
     elf(3E), elf_end(3E), elf_getdata(3E), elf_getehdr(3E), elf_update(3E).

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