mirror of
https://git.savannah.gnu.org/git/inetutils.git
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324 lines
8.5 KiB
C
324 lines
8.5 KiB
C
/*
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Copyright (C) 1995-2025 Free Software Foundation, Inc.
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This file is part of GNU Inetutils.
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GNU Inetutils is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at
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your option) any later version.
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GNU Inetutils is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see `http://www.gnu.org/licenses/'. */
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/*
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* Copyright (c) 1985, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <config.h>
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#include <ctype.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "ftp_var.h"
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/* Increase allocated length of `*startl' with `add'
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* beyond `*track', should present length not suffice.
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* `*track' points to last character in use. All of
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* the values `*start', `*track', * and `*size' are
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* updated during a successful reallocation.
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* Return zero on success.
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*/
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static int
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lengthen (char **start, char **track, size_t *size, size_t add)
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{
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char *new;
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size_t offset = (size_t) (*track - *start);
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if (*track < *start)
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return EXIT_FAILURE; /* Sanity check. */
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if (offset + add < *size)
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return EXIT_SUCCESS; /* Sufficient allocation. */
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new = realloc (*start, *size + add);
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if (!new)
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return EXIT_FAILURE; /* Parameters are unchanged here. */
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*start = new;
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*size += add;
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*track = *start + offset;
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return EXIT_SUCCESS;
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}
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#define MAX_MACRO_NESTING_DEPTH 1000
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void
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domacro (int argc, char *argv[])
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{
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static int nesting_depth = 0;
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int i, j, count = 2, loopflg = 0, allocflg = 0;
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char *cp1, *cp2;
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char *line2; /* Saved original of `line'. */
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size_t line2len; /* Its allocated length. */
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struct cmd *c;
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if (argc < 2 && !another (&argc, &argv, "macro name"))
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{
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printf ("Usage: %s macro_name.\n", argv[0]);
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code = -1;
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return;
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}
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for (i = 0; i < macnum; ++i)
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{
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if (!strncmp (argv[1], macros[i].mac_name, sizeof (macros[i].mac_name)))
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{
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break;
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}
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}
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if (i == macnum)
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{
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printf ("'%s' macro not found.\n", argv[1]);
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code = -1;
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return;
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}
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if (nesting_depth < 0)
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{
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printf ("?Corrupted macro execution state.\n");
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code = -1;
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return;
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}
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line2 = line;
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line2len = linelen;
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/* Generate a replacement for `line' to be used during
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* macro evaluation. There might appear some intr(),
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* so care must be taken before changing `line'.
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* The original is available as LINE2.
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*
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* Initially allocate an amount sufficient for
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* storing a copy of the original `line', which
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* is repeatedly reused once for each text line
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* of the stored macro definition.
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*/
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cp2 = malloc (strlen (line2) + 2);
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if (!cp2)
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{
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printf ("System refused resources for macro '%s'.\n", argv[1]);
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line = line2;
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linelen = line2len;
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code = -1;
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return;
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}
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linelen = strlen (line2) + 2;
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line = cp2;
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*line = '\0';
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if (++nesting_depth > MAX_MACRO_NESTING_DEPTH)
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{
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printf ("?Maximum macro nesting depth reached, aborting macro.\n");
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goto end_exec;
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}
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do
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{
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cp1 = macros[i].mac_start;
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while (cp1 != macros[i].mac_end)
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{
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/* Skip initial white space on each line of input. */
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while (isspace (*cp1))
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{
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cp1++;
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}
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/* Translate a line of text from macro definition
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* and put it in `line'. This global variable is
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* referenced by some parsing functions, so the
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* translation target cannot be changed easily.
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*/
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cp2 = line;
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while (*cp1 != '\0')
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{
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/* Usually two characters suffice.
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* This covers the default case below.
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*/
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if (lengthen (&line, &cp2, &linelen, 2))
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{
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allocflg = 1;
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goto end_exec;
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}
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switch (*cp1)
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{
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case '\\': /* Escaping character. */
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*cp2++ = *++cp1;
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break;
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case '$': /* Substitution. */
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if (isdigit (*(cp1 + 1)))
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{
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/* Argument expansion. */
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j = 0;
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while (isdigit (*++cp1))
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{
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if (j <= (INT_MAX - 9) / 10)
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j = 10 * j + *cp1 - '0';
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}
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cp1--;
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if (argc - 2 >= j && j >= 0)
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{
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if (lengthen (&line, &cp2, &linelen,
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strlen (argv[j + 1]) + 2))
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{
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allocflg = 1;
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goto end_exec;
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}
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strcpy (cp2, argv[j + 1]);
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cp2 += strlen (argv[j + 1]);
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}
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break;
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}
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if (*(cp1 + 1) == 'i')
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{
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/* The loop counter "$i" was detected. */
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loopflg = 1;
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cp1++; /* Back to last used char. */
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if (count < argc)
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{
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if (lengthen (&line, &cp2, &linelen,
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strlen (argv[count]) + 2))
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{
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allocflg = 1;
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goto end_exec;
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}
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strcpy (cp2, argv[count]);
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cp2 += strlen (argv[count]);
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}
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break;
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}
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/* Intentional fall through, since no acceptable
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* use of '$' was detected. Present input is the
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* dollar sign.
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*/
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/* FALLTHROUGH */
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default:
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*cp2++ = *cp1; /* Copy present character. */
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break;
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}
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/* Advance to next usable character. */
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if (*cp1 != '\0')
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cp1++;
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}
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*cp2 = '\0';
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makeargv ();
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if (margv[0] == NULL)
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{
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nesting_depth--;
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return;
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}
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c = getcmd (margv[0]);
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if (c == (struct cmd *) -1)
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{
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printf ("?Ambiguous command: '%s'.\n", margv[0]);
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code = -1;
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loopflg = 0;
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break;
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}
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else if (c == 0)
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{
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printf ("?Invalid command: '%s'.\n", margv[0]);
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code = -1;
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loopflg = 0;
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break;
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}
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else if (c->c_conn && !connected)
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{
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printf ("Not connected, needed for '%s'.\n", margv[0]);
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code = -1;
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loopflg = 0;
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break;
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}
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else
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{
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if (verbose)
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printf ("%s\n", line);
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(*c->c_handler) (margc, margv);
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if (bell && c->c_bell)
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putchar ('\007');
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/* The arguments set at the time of invoking
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* the macro must be recovered, to be used
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* in parsing next line of macro definition.
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*
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* Executing a macro line can change "line"
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* to no longer provide sufficient space for
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* the saved line2 contents.
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*/
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if (strlen (line2) >= linelen)
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{
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char *tmp = realloc (line, strlen (line2) + 1);
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if (tmp == NULL)
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{
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allocflg = 1;
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goto end_exec;
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}
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line = tmp;
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linelen = strlen (line2) + 1;
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}
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strcpy (line, line2);
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makeargv (); /* Get the arguments. */
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argc = margc;
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argv = margv;
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}
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if (cp1 != macros[i].mac_end)
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cp1++;
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}
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}
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while (loopflg && ++count < argc);
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end_exec:
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if (allocflg)
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{
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printf ("Memory allocation failed for macro '%s'.\n", argv[1]);
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code = -1;
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}
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free (line);
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line = line2;
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linelen = line2len;
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nesting_depth--;
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}
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