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- /* sgetopt.c, sgetopt.h: (yet another) improved getopt clone, outer layer
- D. J. Bernstein, djb@pobox.com.
- Depends on subgetopt.h, substdio.h, subfd.h.
- No system requirements.
- 19970208: Cleanups.
- 931201: Baseline.
- No known patent problems.
-
- Documentation in sgetopt.3.
- */
-
- #include "substdio.h"
- #include "subfd.h"
- #define SGETOPTNOSHORT
- #include "sgetopt.h"
- #define SUBGETOPTNOSHORT
- #include "subgetopt.h"
-
- #define getopt sgetoptmine
- #define optind subgetoptind
- #define opterr sgetopterr
- #define optproblem subgetoptproblem
- #define optprogname sgetoptprogname
-
- int opterr = 1;
- char *optprogname = 0;
-
- int getopt(argc,argv,opts)
- int argc;
- char **argv;
- char *opts;
- {
- int c;
- char *s;
-
- if (!optprogname) {
- optprogname = *argv;
- if (!optprogname) optprogname = "";
- for (s = optprogname;*s;++s) if (*s == '/') optprogname = s + 1;
- }
- c = subgetopt(argc,argv,opts);
- if (opterr)
- if (c == '?') {
- char chp[2]; chp[0] = optproblem; chp[1] = '\n';
- substdio_puts(subfderr,optprogname);
- if (argv[optind] && (optind < argc))
- substdio_puts(subfderr,": illegal option -- ");
- else
- substdio_puts(subfderr,": option requires an argument -- ");
- substdio_put(subfderr,chp,2);
- substdio_flush(subfderr);
- }
- return c;
- }
-