/*
 * *    @(#)getopt.c    2.3 (smail) 5/30/87 
 */

/*
 * Here's something you've all been waiting for:  the AT&T public domain
 * source for getopt(3).  It is the code which was given out at the 1985
 * UNIFORUM conference in Dallas. I obtained it by electronic mail directly
 * from AT&T.  The people there assure me that it is indeed in the public
 * domain. 
 *
 * There is no manual page. That is because the one they gave out at UNIFORUM
 * was slightly different from the current System V Release 2 manual page. 
 * The difference apparently involved a note about the famous rules 5 and 6,
 * recommending using white space between an option and its first argument,
 * and not grouping options that have arguments. Getopt itself is currently
 * lenient about both of these things White space is allowed, but not
 * mandatory, and the last option in a group can have an argument.  That
 * particular version of the man page evidently has no official existence,
 * and my source at AT&T did not send a copy. The current SVR2 man page
 * reflects the actual behavior of this getopt. However, I am not about to
 * post a copy of anything licensed by AT&T. 
 */

#ifdef BSD
 #include <strings.h>
#else
 #define index strchr
 #include <string.h>
#endif

/* LINTLIBRARY */
#ifndef NULL
#define NULL    0
#endif

#define EOF    (-1)
#define ERR(s, c)    if(opterr){\
    extern int write(int, void *, unsigned);\
    char errbuf[2];\
    errbuf[0] = (char)c; errbuf[1] = '\n';\
    (void) write(2, strlwr(argv[0]), (unsigned)strlen(argv[0]));\
    (void) write(2, s, (unsigned)strlen(s));\
    (void) write(2, errbuf, 2);}

extern char    *index();

int             opterr = 1;
int             optind = 1;
int             optopt;
char           *optarg;

int getopt(int argc, char *argv[], char *opts)
{
      static int      sp = 1;
      register int    c;
      register char  *cp;

      if (sp == 1)
      {
            if (optind >= argc || argv[optind][0] != '-' ||
                  argv[optind][1] == '\0')
                        return (EOF);
            else if (strcmp(argv[optind], "--") == 0)
            {
                  optind++;
                  return (EOF);
            }
      }
      optopt = c = argv[optind][sp];
      if (c == ':' || (cp = index(opts, c)) == NULL)
      {
            ERR(": illegal option -- ", c);
            if (argv[optind][++sp] == '\0')
            {
                  optind++;
                  sp = 1;
            }
            return ('?');
      }
      if (*++cp == ':')
      {
            if (argv[optind][sp + 1] != '\0')
                  optarg = &argv[optind++][sp + 1];
            else if (++optind >= argc)
            {
                  ERR(": option requires an argument -- ", c);
                  sp = 1;
                  return ('?');
            }
            else  optarg = argv[optind++];
            sp = 1;
      }
      else
      {
            if (argv[optind][++sp] == '\0')
            {
                  sp = 1;
                  optind++;
            }
            optarg = NULL;
      }
      return (c);
}
<td><span title='2003-09-13 07:20:51 +0000'>2003-09-13</span></td><td><a href='/lcd4linux.git/commit/configure.in?id=27b91cea68aa3d71b8316d450a60b3199c80a6b8&amp;follow=1'>[lcd4linux @ 2003-09-13 07:20:51 by reinelt]</a></td><td>reinelt</td><td>3</td><td><span class='deletions'>-12</span>/<span class='insertions'>+32</span></td></tr>
<tr><td><span title='2003-09-13 06:45:43 +0000'>2003-09-13</span></td><td><a href='/lcd4linux.git/commit/Text.c?id=e647c45635992c0b75f7d71bf8681704fc0e714d&amp;follow=1'>[lcd4linux @ 2003-09-13 06:45:43 by reinelt]</a></td><td>reinelt</td><td>9</td><td><span class='deletions'>-57</span>/<span class='insertions'>+188</span></td></tr>
<tr><td><span title='2003-09-13 06:20:39 +0000'>2003-09-13</span></td><td><a href='/lcd4linux.git/commit/configure.in?id=7b6bc7621c9fff5fc1433ac7aa517fd800e712f0&amp;follow=1'>[lcd4linux @ 2003-09-13 06:20:39 by reinelt]</a></td><td>reinelt</td><td>7</td><td><span class='deletions'>-8673</span>/<span class='insertions'>+459</span></td></tr>
<tr><td><span title='2003-09-11 15:05:24 +0000'>2003-09-11</span></td><td><a href='/lcd4linux.git/commit/configure.in?id=ce85c8e37937fe9be2802b48958d030892c5c67d&amp;follow=1'>[lcd4linux @ 2003-09-11 15:05:24 by reinelt]</a></td><td>reinelt</td><td>3</td><td><span class='deletions'>-89</span>/<span class='insertions'>+1519</span></td></tr>
<tr><td><span title='2003-09-11 04:09:53 +0000'>2003-09-11</span></td><td><a href='/lcd4linux.git/commit/processor.c?id=42eb8ba4829ed60addd82f178e3cc1459634e541&amp;follow=1'>[lcd4linux @ 2003-09-11 04:09:52 by reinelt]</a></td><td>reinelt</td><td>6</td><td><span class='deletions'>-14</span>/<span class='insertions'>+46</span></td></tr>
<tr><td><span title='2003-09-10 15:59:39 +0000'>2003-09-10</span></td><td><a href='/lcd4linux.git/commit/processor.c?id=35b12c1caeb9e9e3f326511c429f69eaf864ac32&amp;follow=1'>[lcd4linux @ 2003-09-10 15:59:39 by reinelt]</a></td><td>reinelt</td><td>4</td><td><span class='deletions'>-13</span>/<span class='insertions'>+391</span></td></tr>
<tr><td><span title='2003-09-10 15:09:21 +0000'>2003-09-10</span></td><td><a href='/lcd4linux.git/commit/ChangeLog?id=4565aa4f3c0898a2e4e8ab14b693c3c6df2a3890&amp;follow=1'>[lcd4linux @ 2003-09-10 15:09:21 by reinelt]</a></td><td>reinelt</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+28</span></td></tr>
<tr><td><span title='2003-09-10 14:01:53 +0000'>2003-09-10</span></td><td><a href='/lcd4linux.git/commit/processor.c?id=f3f0b72ff2607397a1d3f6d9523ad85ae271b80c&amp;follow=1'>[lcd4linux @ 2003-09-10 14:01:52 by reinelt]</a></td><td>reinelt</td><td>6</td><td><span class='deletions'>-21</span>/<span class='insertions'>+110</span></td></tr>
<tr><td><span title='2003-09-10 08:37:09 +0000'>2003-09-10</span></td><td><a href='/lcd4linux.git/commit/processor.c?id=e84318e4e452ac32bdca99f31e0c3546dd6418e8&amp;follow=1'>[lcd4linux @ 2003-09-10 08:37:09 by reinelt]</a></td><td>reinelt</td><td>2</td><td><span class='deletions'>-50</span>/<span class='insertions'>+73</span></td></tr>
<tr><td><span title='2003-09-10 03:48:23 +0000'>2003-09-10</span></td><td><a href='/lcd4linux.git/commit/processor.c?id=525c17277ccccf4459be16018576b44e9e6a2a35&amp;follow=1'>[lcd4linux @ 2003-09-10 03:48:22 by reinelt]</a></td><td>reinelt</td><td>7</td><td><span class='deletions'>-47</span>/<span class='insertions'>+130</span></td></tr>
<tr><td><span title='2003-09-09 11:47:47 +0000'>2003-09-09</span></td><td><a href='/lcd4linux.git/commit/USBLCD.c?id=ef5ef770de8b4b5d682d24efff30c6cc084d8cc4&amp;follow=1'>[lcd4linux @ 2003-09-09 11:47:47 by reinelt]</a></td><td>reinelt</td><td>3</td><td><span class='deletions'>-14</span>/<span class='insertions'>+37</span></td></tr>
<tr><td><span title='2003-09-09 06:54:43 +0000'>2003-09-09</span></td><td><a href='/lcd4linux.git/commit/processor.c?id=dd4d20ad1a3970752a4fe81c95c164bf751c0f16&amp;follow=1'>[lcd4linux @ 2003-09-09 06:54:43 by reinelt]</a></td><td>reinelt</td><td>15</td><td><span class='deletions'>-135</span>/<span class='insertions'>+177</span></td></tr>
<tr><td><span title='2003-09-09 05:30:34 +0000'>2003-09-09</span></td><td><a href='/lcd4linux.git/commit/processor.h?id=ca55019e85e081afe878a93ba0dc83a44d862de9&amp;follow=1'>[lcd4linux @ 2003-09-09 05:30:33 by reinelt]</a></td><td>reinelt</td><td>11</td><td><span class='deletions'>-90</span>/<span class='insertions'>+243</span></td></tr>
<tr><td><span title='2003-09-01 07:07:04 +0000'>2003-09-01</span></td><td><a href='/lcd4linux.git/commit/ltmain.sh?id=9da5a161e002a4dbfb27a4d79e616c9850c29ea0&amp;follow=1'>[lcd4linux @ 2003-09-01 07:07:03 by reinelt]</a></td><td>reinelt</td><td>8</td><td><span class='deletions'>-402</span>/<span class='insertions'>+13825</span></td></tr>
<tr><td><span title='2003-09-01 04:09:35 +0000'>2003-09-01</span></td><td><a href='/lcd4linux.git/commit/processor.c?id=947cd14666c824a02a28dd4b83540949e690e4fd&amp;follow=1'>[lcd4linux @ 2003-09-01 04:09:34 by reinelt]</a></td><td>reinelt</td><td>9</td><td><span class='deletions'>-28</span>/<span class='insertions'>+127</span></td></tr>
<tr><td><span title='2003-08-24 05:28:31 +0000'>2003-08-24</span></td><td><a href='/lcd4linux.git/commit/ChangeLog?id=f036c97abc6be80ecc1ca0c2a8dfbe2492e63dc7&amp;follow=1'>[lcd4linux @ 2003-08-24 05:28:31 by reinelt]</a></td><td>reinelt</td><td>1</td><td><span class='deletions'>-119</span>/<span class='insertions'>+156</span></td></tr>
<tr><td><span title='2003-08-24 05:17:58 +0000'>2003-08-24</span></td><td><a href='/lcd4linux.git/commit/system.c?id=019808ae3222f7dc718b8a66d999aabac9f633ee&amp;follow=1'>[lcd4linux @ 2003-08-24 05:17:58 by reinelt]</a></td><td>reinelt</td><td>25</td><td><span class='deletions'>-131</span>/<span class='insertions'>+217</span></td></tr>
<tr><td><span title='2003-08-24 04:31:56 +0000'>2003-08-24</span></td><td><a href='/lcd4linux.git/commit/icon.h?id=86a3dd8e35847debfdce7c65e52b8ffd8913689a&amp;follow=1'>[lcd4linux @ 2003-08-24 04:31:56 by reinelt]</a></td><td>reinelt</td><td>6</td><td><span class='deletions'>-11</span>/<span class='insertions'>+154</span></td></tr>
<tr><td><span title='2003-08-22 03:45:09 +0000'>2003-08-22</span></td><td><a href='/lcd4linux.git/commit/parport.c?id=147c48fbdaaeb39a2b49b18e4cbc7cb3e31d6f2f&amp;follow=1'>[lcd4linux @ 2003-08-22 03:45:08 by reinelt]</a></td><td>reinelt</td><td>3</td><td><span class='deletions'>-8</span>/<span class='insertions'>+25</span></td></tr>
<tr><td><span title='2003-08-20 05:26:43 +0000'>2003-08-20</span></td><td><a href='/lcd4linux.git/commit/bar.c?id=626abb5929b0eed658fe2ef599a228b8b07f8a21&amp;follow=1'>[lcd4linux @ 2003-08-20 05:26:43 by reinelt]</a></td><td>reinelt</td><td>1</td><td><span class='deletions'>-9</span>/<span class='insertions'>+11</span></td></tr>
<tr><td><span title='2003-08-19 05:23:55 +0000'>2003-08-19</span></td><td><a href='/lcd4linux.git/commit/parport.c?id=191b04cd6a955fd0e897d08b8a0d5f34fd6751aa&amp;follow=1'>[lcd4linux @ 2003-08-19 05:23:55 by reinelt]</a></td><td>reinelt</td><td>2</td><td><span class='deletions'>-62</span>/<span class='insertions'>+123</span></td></tr>
<tr><td><span title='2003-08-19 04:28:41 +0000'>2003-08-19</span></td><td><a href='/lcd4linux.git/commit/bar.c?id=b72c7b98553f670f53b42cd98e6156852d8d5203&amp;follow=1'>[lcd4linux @ 2003-08-19 04:28:41 by reinelt]</a></td><td>reinelt</td><td>4</td><td><span class='deletions'>-19</span>/<span class='insertions'>+42</span></td></tr>
<tr><td><span title='2003-08-17 16:37:39 +0000'>2003-08-17</span></td><td><a href='/lcd4linux.git/commit/processor.c?id=946a5ef8dd7de4c8900dc52d5597b6ded3764394&amp;follow=1'>[lcd4linux @ 2003-08-17 16:37:39 by reinelt]</a></td><td>reinelt</td><td>5</td><td><span class='deletions'>-23</span>/<span class='insertions'>+77</span></td></tr>
<tr><td><span title='2003-08-17 12:11:58 +0000'>2003-08-17</span></td><td><a href='/lcd4linux.git/commit/display.h?id=a7a01e3ffef0fdb4c3bb51afb2928c3f6828ccc9&amp;follow=1'>[lcd4linux @ 2003-08-17 12:11:58 by reinelt]</a></td><td>reinelt</td><td>6</td><td><span class='deletions'>-27</span>/<span class='insertions'>+118</span></td></tr>
<tr><td><span title='2003-08-17 08:25:30 +0000'>2003-08-17</span></td><td><a href='/lcd4linux.git/commit/configure.in?id=425f0326d5960a40f264a64b625747d99bd59b4b&amp;follow=1'>[lcd4linux @ 2003-08-17 08:25:30 by reinelt]</a></td><td>reinelt</td><td>6</td><td><span class='deletions'>-46</span>/<span class='insertions'>+185</span></td></tr>
<tr><td><span title='2003-08-17 06:57:04 +0000'>2003-08-17</span></td><td><a href='/lcd4linux.git/commit/Makefile.in?id=e5a64d09f3358214ae09ee28fc727489b3fb037f&amp;follow=1'>[lcd4linux @ 2003-08-17 06:57:04 by reinelt]</a></td><td>reinelt</td><td>5</td><td><span class='deletions'>-544</span>/<span class='insertions'>+325</span></td></tr>