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tput.c

/****************************************************************************
 * Copyright (c) 1998-2003,2004 Free Software Foundation, Inc.              *
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 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
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 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
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 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
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/****************************************************************************
 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
 ****************************************************************************/

/*
 * tput.c -- shellscript access to terminal capabilities
 *
 * by Eric S. Raymond <esr@snark.thyrsus.com>, portions based on code from
 * Ross Ridge's mytinfo package.
 */

#include <progs.priv.h>

#if !PURE_TERMINFO
#include <termsort.c>
#endif
#include <transform.h>

MODULE_ID("$Id: tput.c,v 1.34 2004/01/16 23:23:11 Daniel.Jacobowitz Exp $")

#define PUTS(s)         fputs(s, stdout)
#define PUTCHAR(c)      putchar(c)
#define FLUSH           fflush(stdout)

typedef enum {
    Numbers = 0
    ,Num_Str
    ,Num_Str_Str
} TParams;

static char *prg_name;
static bool is_init = FALSE;
static bool is_reset = FALSE;

static void
quit(int status, const char *fmt,...)
{
    va_list argp;

    va_start(argp, fmt);
    fprintf(stderr, "%s: ", prg_name);
    vfprintf(stderr, fmt, argp);
    fprintf(stderr, "\n");
    va_end(argp);
    ExitProgram(status);
}

static void
usage(void)
{
    fprintf(stderr, "usage: %s [-V] [-S] [-T term] capname\n", prg_name);
    ExitProgram(EXIT_FAILURE);
}

static void
check_aliases(const char *name)
{
    is_init = (strcmp(name, PROG_INIT) == 0);
    is_reset = (strcmp(name, PROG_RESET) == 0);
}

/*
 * Lookup the type of call we should make to tparm().  This ignores the actual
 * terminfo capability (bad, because it is not extensible), but makes this
 * code portable to platforms where sizeof(int) != sizeof(char *).
 *
 * FIXME: If we want extensibility, analyze the capability string as we do
 * in tparm() to decide how to parse the varargs list.
 */
static TParams
tparm_type(const char *name)
{
#define TD(code, longname, ti, tc) {code,longname},{code,ti},{code,tc}
    TParams result = Numbers;
    /* *INDENT-OFF* */
    static const struct {
      TParams code;
      const char *name;
    } table[] = {
      TD(Num_Str, "pkey_key", "pfkey",    "pk"),
      TD(Num_Str, "pkey_local",     "pfloc",    "pl"),
      TD(Num_Str, "pkey_xmit",      "pfx",            "px"),
      TD(Num_Str, "plab_norm",      "pln",            "pn"),
      TD(Num_Str_Str, "pkey_plab",  "pfxl",           "xl"),
    };
    /* *INDENT-ON* */

    unsigned n;
    for (n = 0; n < SIZEOF(table); n++) {
      if (!strcmp(name, table[n].name)) {
          result = table[n].code;
          break;
      }
    }
    return result;
}

static int
exit_code(int token, int value)
{
    int result = 99;

    switch (token) {
    case BOOLEAN:
      result = !value;  /* TRUE=0, FALSE=1 */
      break;
    case NUMBER:
      result = 0;       /* always zero */
      break;
    case STRING:
      result = value;         /* 0=normal, 1=missing */
      break;
    }
    return result;
}

static int
tput(int argc, char *argv[])
{
    NCURSES_CONST char *name;
    char *s;
    int i, j, c;
    int status;
    FILE *f;
    int token = UNDEF;

    if ((name = argv[0]) == 0)
      name = "";
    check_aliases(name);
    if (is_reset || is_init) {
      if (init_prog != 0) {
          system(init_prog);
      }
      FLUSH;

      if (is_reset && reset_1string != 0) {
          PUTS(reset_1string);
      } else if (init_1string != 0) {
          PUTS(init_1string);
      }
      FLUSH;

      if (is_reset && reset_2string != 0) {
          PUTS(reset_2string);
      } else if (init_2string != 0) {
          PUTS(init_2string);
      }
      FLUSH;

#ifdef set_lr_margin
      if (set_lr_margin != 0) {
          PUTS(tparm(set_lr_margin, 0, columns - 1));
      } else
#endif
#ifdef set_left_margin_parm
          if (set_left_margin_parm != 0
            && set_right_margin_parm != 0) {
          PUTS(tparm(set_left_margin_parm, 0));
          PUTS(tparm(set_right_margin_parm, columns - 1));
      } else
#endif
          if (clear_margins != 0
            && set_left_margin != 0
            && set_right_margin != 0) {
          PUTS(clear_margins);
          if (carriage_return != 0) {
            PUTS(carriage_return);
          } else {
            PUTCHAR('\r');
          }
          PUTS(set_left_margin);
          if (parm_right_cursor) {
            PUTS(tparm(parm_right_cursor, columns - 1));
          } else {
            for (i = 0; i < columns - 1; i++) {
                PUTCHAR(' ');
            }
          }
          PUTS(set_right_margin);
          if (carriage_return != 0) {
            PUTS(carriage_return);
          } else {
            PUTCHAR('\r');
          }
      }
      FLUSH;

      if (init_tabs != 8) {
          if (clear_all_tabs != 0 && set_tab != 0) {
            for (i = 0; i < columns - 1; i += 8) {
                if (parm_right_cursor) {
                  PUTS(tparm(parm_right_cursor, 8));
                } else {
                  for (j = 0; j < 8; j++)
                      PUTCHAR(' ');
                }
                PUTS(set_tab);
            }
            FLUSH;
          }
      }

      if (is_reset && reset_file != 0) {
          f = fopen(reset_file, "r");
          if (f == 0) {
            quit(4 + errno, "Can't open reset_file: '%s'", reset_file);
          }
          while ((c = fgetc(f)) != EOF) {
            PUTCHAR(c);
          }
          fclose(f);
      } else if (init_file != 0) {
          f = fopen(init_file, "r");
          if (f == 0) {
            quit(4 + errno, "Can't open init_file: '%s'", init_file);
          }
          while ((c = fgetc(f)) != EOF) {
            PUTCHAR(c);
          }
          fclose(f);
      }
      FLUSH;

      if (is_reset && reset_3string != 0) {
          PUTS(reset_3string);
      } else if (init_2string != 0) {
          PUTS(init_2string);
      }
      FLUSH;
      return 0;
    }

    if (strcmp(name, "longname") == 0) {
      PUTS(longname());
      return 0;
    }
#if !PURE_TERMINFO
    {
      const struct name_table_entry *np;

      if ((np = _nc_find_entry(name, _nc_get_hash_table(1))) != 0)
          switch (np->nte_type) {
          case BOOLEAN:
            if (bool_from_termcap[np->nte_index])
                name = boolnames[np->nte_index];
            break;

          case NUMBER:
            if (num_from_termcap[np->nte_index])
                name = numnames[np->nte_index];
            break;

          case STRING:
            if (str_from_termcap[np->nte_index])
                name = strnames[np->nte_index];
            break;
          }
    }
#endif

    if ((status = tigetflag(name)) != -1) {
      return exit_code(BOOLEAN, status);
    } else if ((status = tigetnum(name)) != CANCELLED_NUMERIC) {
      (void) printf("%d\n", status);
      return exit_code(NUMBER, 0);
    } else if ((s = tigetstr(name)) == CANCELLED_STRING) {
      quit(4, "unknown terminfo capability '%s'", name);
    } else if (s != ABSENT_STRING) {
      token = STRING;
      if (argc > 1) {
          int k;
          int popcount;
          long numbers[1 + NUM_PARM];
          char *strings[1 + NUM_PARM];
          char *p_is_s[NUM_PARM];

          /* Nasty hack time. The tparm function needs to see numeric
           * parameters as numbers, not as pointers to their string
           * representations
           */

          for (k = 1; k < argc; k++) {
            char *tmp = 0;
            strings[k] = argv[k];
            numbers[k] = strtol(argv[k], &tmp, 0);
            if (tmp == 0 || *tmp != 0)
                numbers[k] = 0;
          }
          for (k = argc; k <= NUM_PARM; k++) {
            numbers[k] = 0;
            strings[k] = 0;
          }

          switch (tparm_type(name)) {
          case Num_Str:
            s = tparm(s, numbers[1], strings[2]);
            break;
          case Num_Str_Str:
            s = tparm(s, numbers[1], strings[2], strings[3]);
            break;
          default:
            (void) _nc_tparm_analyze(s, p_is_s, &popcount);
#define myParam(n) (p_is_s[n - 1] != 0 ? ((long) strings[n]) : numbers[n])
            s = tparm(s,
                    myParam(1),
                    myParam(2),
                    myParam(3),
                    myParam(4),
                    myParam(5),
                    myParam(6),
                    myParam(7),
                    myParam(8),
                    myParam(9));
            break;
          }
      }

      /* use putp() in order to perform padding */
      putp(s);
      return exit_code(STRING, 0);
    }
    return exit_code(STRING, 1);
}

int
main(int argc, char **argv)
{
    char *term;
    int errret;
    bool cmdline = TRUE;
    int c;
    char buf[BUFSIZ];
    int result = 0;
    int err;

    check_aliases(prg_name = _nc_rootname(argv[0]));

    term = getenv("TERM");

    while ((c = getopt(argc, argv, "ST:V")) != EOF) {
      switch (c) {
      case 'S':
          cmdline = FALSE;
          break;
      case 'T':
          use_env(FALSE);
          term = optarg;
          break;
      case 'V':
          puts(curses_version());
          return EXIT_SUCCESS;
      default:
          usage();
          /* NOTREACHED */
      }
    }

    /*
     * Modify the argument list to omit the options we processed.
     */
    if (is_reset || is_init) {
      if (optind-- < argc) {
          argc -= optind;
          argv += optind;
      }
      argv[0] = prg_name;
    } else {
      argc -= optind;
      argv += optind;
    }

    if (term == 0 || *term == '\0')
      quit(2, "No value for $TERM and no -T specified");

    if (setupterm(term, STDOUT_FILENO, &errret) != OK && errret <= 0)
      quit(3, "unknown terminal \"%s\"", term);

    if (cmdline) {
      if ((argc <= 0) && !is_reset && !is_init)
          usage();
      return tput(argc, argv);
    }

    while (fgets(buf, sizeof(buf), stdin) != 0) {
      char *argvec[16]; /* command, 9 parms, null, & slop */
      int argnum = 0;
      char *cp;

      /* crack the argument list into a dope vector */
      for (cp = buf; *cp; cp++) {
          if (isspace(UChar(*cp))) {
            *cp = '\0';
          } else if (cp == buf || cp[-1] == 0) {
            argvec[argnum++] = cp;
            if (argnum >= (int) SIZEOF(argvec) - 1)
                break;
          }
      }
      argvec[argnum] = 0;

      if (argnum != 0
          && (err = tput(argnum, argvec)) != 0) {
          if (result == 0)
            result = 4; /* will return value >4 */
          ++result;
      }
    }

    return result;
}

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