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- Committer: Bazaar Package Importer
- Author(s): Thomas Schoepf
- Date: 2002-04-04 16:43:52 UTC
- Revision ID: james.westby@ubuntu.com-20020404164352-qldq048yoc7x5sd5
Tags: upstream-374
Import upstream version 374
- files added:
added
removed
lessecho.c
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/*
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* Copyright (C) 1984-2000 Mark Nudelman
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*
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* You may distribute under the terms of either the GNU General Public
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* License or the Less License, as specified in the README file.
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*
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* For more information about less, or for information on how to
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* contact the author, see the README file.
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*/
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/*
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* lessecho [-ox] [-cx] [-pn] [-dn] [-a] file ...
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* Simply echos its filename arguments on standard output.
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* But any argument containing spaces is enclosed in quotes.
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*
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* -ox Specifies "x" to be the open quote character.
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* -cx Specifies "x" to be the close quote character.
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* -pn Specifies "n" to be the open quote character, as an integer.
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* -dn Specifies "n" to be the close quote character, as an integer.
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* -mx Specifies "x" to be a metachar.
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* -nn Specifies "n" to be a metachar, as an integer.
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* -ex Specifies "x" to be the escape char for metachars.
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* -fn Specifies "x" to be the escape char for metachars, as an integer.
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* -a Specifies that all arguments are to be quoted.
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* The default is that only arguments containing spaces are quoted.
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*/
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#include "less.h"
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static char *version = "$Revision: 1.7 $";
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static int quote_all = 0;
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static char openquote = '"';
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static char closequote = '"';
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static char *meta_escape = "\\";
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static char metachars[64] = "";
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static int num_metachars = 0;
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static void
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pr_usage()
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{
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fprintf(stderr,
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"usage: lessecho [-ox] [-cx] [-pn] [-dn] [-mx] [-nn] [-a] file ...\n");
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}
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static void
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pr_version()
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{
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char *p;
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char buf[10];
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char *pbuf = buf;
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for (p = version; *p != ' '; p++)
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if (*p == '\0')
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return;
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for (p++; *p != '$' && *p != ' ' && *p != '\0'; p++)
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*pbuf++ = *p;
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*pbuf = '\0';
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printf("%s\n", buf);
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}
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static void
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pr_error(s)
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char *s;
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{
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fprintf(stderr, "%s\n", s);
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exit(1);
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}
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static long
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lstrtol(s, radix, pend)
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char *s;
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int radix;
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char **pend;
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{
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int v;
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int neg = 0;
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long n = 0;
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/* Skip leading white space. */
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while (*s == ' ' || *s == '\t')
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s++;
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/* Check for a leading + or -. */
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if (*s == '-')
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{
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neg = 1;
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s++;
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} else if (*s == '+')
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{
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s++;
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}
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/* Determine radix if caller does not specify. */
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if (radix == 0)
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{
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radix = 10;
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if (*s == '0')
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{
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switch (*++s)
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{
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case 'x':
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radix = 16;
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s++;
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break;
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default:
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radix = 8;
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break;
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}
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}
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}
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/* Parse the digits of the number. */
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for (;;)
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{
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if (*s >= '0' && *s <= '9')
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v = *s - '0';
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else if (*s >= 'a' && *s <= 'f')
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v = *s - 'a' + 10;
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else if (*s >= 'A' && *s <= 'F')
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v = *s - 'A' + 10;
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else
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break;
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if (v >= radix)
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break;
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n = n * radix + v;
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s++;
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}
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if (pend != NULL)
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{
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/* Skip trailing white space. */
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while (*s == ' ' || *s == '\t')
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s++;
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*pend = s;
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}
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if (neg)
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return (-n);
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return (n);
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}
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#if !HAVE_STRCHR
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char *
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strchr(s, c)
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char *s;
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int c;
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{
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for ( ; *s != '\0'; s++)
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if (*s == c)
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return (s);
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if (c == '\0')
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return (s);
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return (NULL);
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}
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#endif
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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char *arg;
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char *s;
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int no_more_options;
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no_more_options = 0;
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while (--argc > 0)
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{
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arg = *++argv;
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if (*arg != '-' || no_more_options)
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break;
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switch (*++arg)
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{
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case 'a':
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quote_all = 1;
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break;
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case 'c':
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closequote = *++arg;
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break;
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case 'd':
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closequote = lstrtol(++arg, 0, &s);
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if (s == arg)
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pr_error("Missing number after -d");
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break;
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case 'e':
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if (strcmp(++arg, "-") == 0)
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meta_escape = "";
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else
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meta_escape = arg;
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break;
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case 'o':
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openquote = *++arg;
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break;
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case 'p':
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openquote = lstrtol(++arg, 0, &s);
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if (s == arg)
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pr_error("Missing number after -p");
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break;
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case 'm':
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metachars[num_metachars++] = *++arg;
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metachars[num_metachars] = '\0';
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break;
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case 'n':
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metachars[num_metachars++] = lstrtol(++arg, 0, &s);
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if (s == arg)
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pr_error("Missing number after -n");
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metachars[num_metachars] = '\0';
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break;
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case '?':
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pr_usage();
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return (0);
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case '-':
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if (*++arg == '\0')
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{
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no_more_options = 1;
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break;
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}
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if (strcmp(arg, "version") == 0)
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{
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pr_version();
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return (0);
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}
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if (strcmp(arg, "help") == 0)
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{
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pr_usage();
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return (0);
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}
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pr_error("Invalid option after --");
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default:
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pr_error("Invalid option letter");
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}
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}
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while (argc-- > 0)
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{
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int has_meta = 0;
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arg = *argv++;
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for (s = arg; *s != '\0'; s++)
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{
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if (strchr(metachars, *s) != NULL)
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{
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has_meta = 1;
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break;
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}
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}
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if (quote_all || (has_meta && strlen(meta_escape) == 0))
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printf("%c%s%c", openquote, arg, closequote);
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else
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{
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for (s = arg; *s != '\0'; s++)
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{
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if (strchr(metachars, *s) != NULL)
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printf("%s", meta_escape);
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printf("%c", *s);
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}
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}
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if (argc > 0)
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printf(" ");
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else
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printf("\n");
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}
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return (0);
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}
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