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getobjformat(3)

NAME

     getobjformat -- get preferred object file format

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <objformat.h>

     int
     getobjformat(char *buf, size_t bufsize, int *argcp, char **argv);

DESCRIPTION

     The getobjformat() function queries several sources to determine the pre-
     ferred object file format, and copies its name into a buffer provided by
     the caller.

     The object file format is determined as follows.  If argv is non-NULL and
     an explicit command line argument such as -aout or -elf is present, then
     that determines the object file format.

     Otherwise, if the variable OBJFORMAT is set in the environment, the
     object file format is taken from its value.

     Otherwise, if the file /etc/objformat is readable and contains a line of
     the form `OBJFORMAT=xxx', the object file format is taken from there.

     Otherwise, a built-in system default object file format is returned.

     buf points to a user-supplied buffer into which the name of the object
     file format is copied.  bufsize gives the size of the buffer in bytes.
     The string placed in buf is always null-terminated.  It is an error if
     the buffer is too small to hold the null-terminated name.

     argv points to a NULL-terminated argument vector to be scanned for object
     format options.  argv may be NULL, in which case the argument vector is
     not scanned.

     If argcp is non-NULL, any object format options are deleted from the
     argument vector, and the updated argument count is stored into the inte-
     ger referenced by argcp.  If argcp is NULL, the argument vector is left
     unchanged.

RETURN VALUES

     On success, getobjformat() returns the length of the object file format
     name, not counting the null terminator.  If the supplied buffer is too
     small to hold the object file format and its null terminator,
     getobjformat() returns -1.  In that case, the contents of the buffer and
     argument vector supplied by the caller are indeterminate.

ENVIRONMENT

     OBJFORMAT	If the environment variable OBJFORMAT is set, it overrides the
		default object file format.  OBJFORMAT takes precedence over
		/etc/objformat.

FILES

     /etc/objformat  If present, specifies the object file format to use.

FreeBSD 5.4		       September 7, 1998		   FreeBSD 5.4

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