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Diffstat (limited to 'examples/loadables/print.c')
| -rw-r--r-- | examples/loadables/print.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/examples/loadables/print.c b/examples/loadables/print.c new file mode 100644 index 0000000..d6c5903 --- /dev/null +++ b/examples/loadables/print.c @@ -0,0 +1,193 @@ +/* + * print -- loadable ksh-93 style print builtin + */ + +/* + Copyright (C) 1999-2009 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include "bashtypes.h" + +#include <errno.h> +#include <limits.h> +#include <stdio.h> + +#include "bashansi.h" +#include "shell.h" +#include "builtins.h" +#include "stdc.h" +#include "bashgetopt.h" +#include "builtext.h" +#include "common.h" + +#if !defined (errno) +extern int errno; +#endif + +int print_builtin (); +static int printargs (); + +static FILE *ofp; + +extern char *this_command_name; + +static char *print_doc[] = { + "Display arguments.", + "", + "Output the arguments. The -f option means to use the argument as a", + "format string as would be supplied to printf(1). The rest of the", + "options are as in ksh.", + (char *)NULL +}; + +struct builtin print_struct = { + "print", + print_builtin, + BUILTIN_ENABLED, + print_doc, + "print [-Rnprs] [-u unit] [-f format] [arguments]", + (char *)0 +}; + +#ifndef ISOPTION +#define ISOPTION(s, c) (s[0] == '-' && s[2] == '\0' && s[1] == c) +#endif + +int +print_builtin (list) + WORD_LIST *list; +{ + int c, r, nflag, raw, ofd, sflag; + intmax_t lfd; + char **v, *pfmt, *arg; + WORD_LIST *l; + + nflag = raw = sflag = 0; + ofd = 1; + pfmt = 0; + + reset_internal_getopt (); + while ((c = internal_getopt (list, "Rnprsu:f:")) != -1) + { + switch (c) + { + case 'R': + raw = 2; + loptend = lcurrent; + if (loptend && ISOPTION (loptend->word->word, 'n')) + { + loptend = loptend->next; + nflag = 1; + } + goto opt_end; + case 'r': + raw = 1; + break; + case 'n': + nflag = 1; + break; + case 's': + sflag = 1; + break; + case 'p': + break; /* NOP */ + case 'u': + if (all_digits (list_optarg) && legal_number (list_optarg, &lfd) && lfd == (int)lfd) + ofd = lfd; + else + { + for (l = list; l->next && l->next != lcurrent; l = l->next); + lcurrent = loptend = l; + goto opt_end; + } + break; + case 'f': + pfmt = list_optarg; + break; + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + +opt_end: + list = loptend; + + ofp = (ofd == 1) ? stdout : fdopen (dup (ofd), "w"); + + if (pfmt) + { + WORD_DESC *w; + WORD_LIST *nlist; + + w = make_word (pfmt); + nlist = make_word_list (w, list); + r = printf_builtin (nlist); + nlist->next = (WORD_LIST *)NULL; + dispose_words (nlist); + return (r); + } + + if (raw) + { + for (l = list; l; l = l->next) + { + fprintf (ofp, "%s", l->word->word); + if (l->next) + fprintf (ofp, " "); + } + if (nflag == 0) + fprintf (ofp, "\n"); + fflush (ofp); + return (0); + } + + r = printargs (list, ofp); + if (r && nflag == 0) + fprintf (ofp, "\n"); + if (ofd != 1) + fclose (ofp); + return 0; +} + +static int +printargs (list, ofp) + WORD_LIST *list; + FILE *ofp; +{ + WORD_LIST *l; + char *ostr; + int sawc; + + for (sawc = 0, l = list; l; l = l->next) + { + ostr = ansicstr (l->word->word, strlen (l->word->word), 0, &sawc, (int *)0); + if (ostr) + fprintf (ofp, "%s", ostr); + free (ostr); + if (sawc) + return (0); + if (l->next) + fprintf (ofp, " "); + } + return (1); +} |