1994-09-03 19:16:28 +00:00
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Portability of the new file(1) command.
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1999-08-28 01:08:13 +00:00
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@(#) $FreeBSD$
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1994-09-03 19:16:28 +00:00
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Read this file only if the program doesn't compile on your system.
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This release has been around UNIX; it has been compiled and tested
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in the following environments:
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SunOS sqarc 4.1.1 8 sun4
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No problems.
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ULTRIX squint 4.2 0 RISC
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No problems.
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A/UX sqmac 3.0a9 SVR22 mc68020
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No problems.
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AIX sqibm 2 3 000XXXXXX100
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Had weird "make" problems making "magic" file automatically; just
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built it by hand. Your mileage may vary.
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SCO sqwang 3.2 2 i386
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Compiles fine; their weird make can't handle "[a-z]*" as a dependancy,
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so build magic by hand. Runs fine.
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sqzme sqzme 3.1.1 3 3B2
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The 3B2 SVR3 needed a few tweaks as well as COPTS = -Ilocalinc
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in order to compile.
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This version, reluctanly, includes <stdlib.h>, which won't exist
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on older systems or those that aren't even close to the ANSI C
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standard. There is a null "stdlib.h", and some other bogus headers,
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in subdirectory "localinc"; if you get complaints about missing
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stdlib.h and others, uncomment the line with COPTS=-Ilocalinc
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in the Makefile, and try again.
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You must have either <stdarg.h> or the older <varargs.h>, otherwise you'll
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have to butcher some routines in print.c.
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Beyond that, I have tried to make a program that doesn't need any
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command-line defines (-D) to specify what version of UNIX is in use,
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by using the definitions available in the system #include
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files. For example, the lstat(2) call is normally found in
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4BSD systems, but might be grafted into some other variant
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of UNIX. If it's done right (ie., using the same definitions),
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my program will compile and work correctly. Look at the #ifdefs
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to see how it's done.
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I've also tried to include source for all the non-portable library routines
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I used (getopt, str*). Non-portable here means `not in every
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reasonably standard UNIX out there: V7, System V, 4BSD'.
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These are in subdirectory "localsrc", and not used unless you
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need them; again, see the Makefile.
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There is one area that just might cause problems. On System
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V, they moved the definition of major() and minor() out of
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<sys/types.h> into <sys/sysmacros.h>. Hence, if major isn't
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defined after including types.h, I automatically include sys/sysmacros.h.
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This will work for 99% of the systems out there. ONLY if you
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have a system in which neither types.h nor sysmacros.h defines
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`major' will this automatic include fail (I hope). On such
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systems, you will get a compilation error in trying to compile
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a warning message. Please do the following:
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1) change the appropriate #include at the start of fsmagic.c
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and 2) let me know the name of the system, the release number,
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and the name of the header file that *does* include
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this "standard" definition.
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If you are running the old Ritchie PDP-11 C compiler or
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some other compiler that doesn't know about `void', you will have
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to include `-Dvoid=int' in the variable COPTS in the Makefile.
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Other than this, there should be no portability problems,
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but one never knows these days. Please let me know of any
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other problems you find porting to a UNIX system. I don't much
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care about non-UNIX systems but will collect widely-used magic
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numbers for them as well as for UNIX systems.
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Mark Moraes and Christos Zoulas
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(address in README)
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