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Top Forums Shell Programming and Scripting sh is a real file or just a link? Post 302470084 by Scrutinizer on Tuesday 9th of November 2010 06:29:44 AM
Old 11-09-2010
AFAIK of the modern OS, only on Solaris /bin/sh points to an actual bare-bones Bourne Shell, which is indeed the "earliest shell".
On most other modern systems /bin/sh is either a soft link or a hard link to a POSIX-compliant shell, which may have additional features.
On Solaris, /usr/xpg4/bin/sh should be used instead.

If you stick to the features listed on this page: POSIX Shell & Utilities your scripts should work across platforms...

Last edited by Scrutinizer; 11-09-2010 at 07:34 AM..
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cc(1B)						     SunOS/BSD Compatibility Package Commands						    cc(1B)

NAME
cc - C compiler SYNOPSIS
/usr/ucb/cc [options] DESCRIPTION
/usr/ucb/cc is the interface to the BSD Compatibility Package C compiler. It is a script that looks for the link /usr/ccs/bin/ucbcc to the C compiler. The /usr/ccs/bin/ucbcc link is available only with the SPROcc package, whose default location is /opt/SUNWspro. The /usr/ucb/cc interface is identical to /usr/ccs/bin/ucbcc, except that BSD headers are used and BSD libraries are linked before base libraries. The /opt/SUNWspro/man/man1/acc.1 man page is available only with the SPROcc package. OPTIONS
The /usr/ucb/cc interface accepts the same options as /usr/ccs/bin/ucbcc, with the following exceptions: -Idir Search dir for included files whose names do not begin with a slash (/) prior to searching the usual directories. The directories for multiple -I options are searched in the order specified. The preprocessor first searches for #include files in the directory containing sourcefile, and then in directories named with -I options (if any), then /usr/ucbinclude, and finally, in /usr/include. -Ldir Add dir to the list of directories searched for libraries by /usr/ccs/bin/ucbcc. This option is passed to /usr/ccs/bin/ld and /usr/lib. Directories specified with this option are searched before /usr/ucblib and /usr/lib. -Y P, dir Change the default directory used for finding libraries. EXIT STATUS
The following exit values are returned: 0 Successful compilation or link edit. >0 An error occurred. FILES
/usr/ccs/bin/ld link editor /usr/lib/libc C library /usr/ucbinclude BSD Compatibility directory for header files /usr/ucblib BSD Compatibility directory for libraries /usr/ucblib/libucb BSD Compatibility C library /usr/lib/libsocket library containing socket routines /usr/lib/libnsl library containing network functions /usr/lib/libelf library containing routines to process ELF object files /usr/lib/libaio library containing asynchronous I/O routines ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
ld(1), a.out(4), attributes(5) NOTES
The -Y P, dir option may have unexpected results and should not be used. SunOS 5.10 24 Feb 1998 cc(1B)
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