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ede479967f
This takes another small step towards disentangling the build system from the old AT&T environment. The USAGE_LICENSE macros with author and copyright information, which was formerly generated dynamically for each file from a database, are eliminated and the copyright/author information is instead inserted into the AST getopt usage strings directly. Repetitive license/copyright information is also removed from the getopt strings in the builtin commands (src/lib/libcmd/*.c and src/cmd/ksh93/data/builtins.c). There's no need to include 55 identical license/copyright strings in the ksh binary; one (in the main ksh getopt string, shown by ksh --man) ought to be enough! This makes the ksh binary about 10k smaller. It does mean that something like 'enum --author', 'typeset --license' or 'shift --copyright' will now not show those notices for those builtins, but I doubt anyone will care.
139 lines
4.8 KiB
C
139 lines
4.8 KiB
C
/***********************************************************************
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* *
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* This software is part of the ast package *
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* Copyright (c) 1992-2012 AT&T Intellectual Property *
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* and is licensed under the *
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* Eclipse Public License, Version 1.0 *
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* by AT&T Intellectual Property *
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* *
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* A copy of the License is available at *
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* http://www.eclipse.org/org/documents/epl-v10.html *
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* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
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* *
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* Information and Software Systems Research *
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* AT&T Research *
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* Florham Park NJ *
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* *
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* Glenn Fowler <gsf@research.att.com> *
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* David Korn <dgk@research.att.com> *
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* *
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***********************************************************************/
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#pragma prototyped
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/*
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* David Korn
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* AT&T Bell Laboratories
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*
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* dirname path [suffix]
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*
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* print the dirname of a pathname
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*/
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static const char usage[] =
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"[-?\n@(#)$Id: dirname (AT&T Research) 2009-01-31 $\n]"
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"[--catalog?" ERROR_CATALOG "]"
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"[+NAME?dirname - return directory portion of file name]"
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"[+DESCRIPTION?\bdirname\b treats \astring\a as a file name and returns "
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"the name of the directory containing the file name by deleting "
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"the last component from \astring\a.]"
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"[+?If \astring\a consists solely of \b/\b characters the output will "
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"be a single \b/\b unless \bPATH_LEADING_SLASHES\b returned by "
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"\bgetconf\b(1) is \b1\b and \astring\a consists of multiple "
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"\b/\b characters in which case \b//\b will be output. "
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"Otherwise, trailing \b/\b characters are removed, and if "
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"there are no remaining \b/\b characters in \astring\a, "
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"the string \b.\b will be written to standard output. "
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"Otherwise, all characters following the last \b/\b are removed. "
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"If the remaining string consists solely of \b/\b characters, "
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"the output will be as if the original string had consisted solely "
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"as \b/\b characters as described above. Otherwise, all "
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"trailing slashes are removed and the output will be this string "
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"unless this string is empty. If empty the output will be \b.\b.]"
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"[f:file?Print the \b$PATH\b relative regular file path for \astring\a.]"
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"[r:relative?Print the \b$PATH\b relative readable file path for \astring\a.]"
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"[x:executable?Print the \b$PATH\b relative executable file path for \astring\a.]"
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"\n"
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"\nstring\n"
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"\n"
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"[+EXIT STATUS?]{"
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"[+0?Successful completion.]"
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"[+>0?An error occurred.]"
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"}"
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"[+SEE ALSO?\bbasename\b(1), \bgetconf\b(1), \bdirname\b(3), \bpathname\b(3)]"
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;
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#include <cmd.h>
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static void l_dirname(register Sfio_t *outfile, register const char *pathname)
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{
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register const char *last;
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/* go to end of path */
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for(last=pathname; *last; last++);
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/* back over trailing '/' */
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while(last>pathname && *--last=='/');
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/* back over non-slash chars */
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for(;last>pathname && *last!='/';last--);
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if(last==pathname)
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{
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/* all '/' or "" */
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if(*pathname!='/')
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last = pathname = ".";
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}
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else
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{
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/* back over trailing '/' */
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for(;*last=='/' && last > pathname; last--);
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}
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/* preserve // */
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if(last!=pathname && pathname[0]=='/' && pathname[1]=='/')
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{
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while(pathname[2]=='/' && pathname<last)
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pathname++;
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if(last!=pathname && pathname[0]=='/' && pathname[1]=='/' && *astconf("PATH_LEADING_SLASHES",NiL,NiL)!='1')
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pathname++;
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}
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sfwrite(outfile,pathname,last+1-pathname);
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sfputc(outfile,'\n');
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}
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int
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b_dirname(int argc, char** argv, Shbltin_t* context)
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{
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int mode = 0;
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char buf[PATH_MAX];
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cmdinit(argc, argv, context, ERROR_CATALOG, 0);
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for (;;)
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{
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switch (optget(argv, usage))
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{
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case 'f':
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mode |= PATH_REGULAR;
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continue;
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case 'r':
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mode &= ~PATH_REGULAR;
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mode |= PATH_READ;
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continue;
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case 'x':
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mode |= PATH_EXECUTE;
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continue;
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case ':':
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error(2, "%s", opt_info.arg);
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break;
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case '?':
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error(ERROR_usage(2), "%s", opt_info.arg);
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break;
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}
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break;
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}
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argv += opt_info.index;
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argc -= opt_info.index;
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if(error_info.errors || argc != 1)
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error(ERROR_usage(2),"%s", optusage(NiL));
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if(!mode)
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l_dirname(sfstdout,argv[0]);
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else if(pathpath(argv[0], "", mode, buf, sizeof(buf)))
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sfputr(sfstdout, buf, '\n');
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else
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error(1|ERROR_WARNING, "%s: relative path not found", argv[0]);
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return 0;
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}
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