+++ /dev/null
-/* util.c -- readline utility functions */
-
-/* Copyright (C) 1987-2017 Free Software Foundation, Inc.
-
- This file is part of the GNU Readline Library (Readline), a library
- for reading lines of text with interactive input and history editing.
-
- Readline 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.
-
- Readline 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 Readline. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#define READLINE_LIBRARY
-
-#if defined (HAVE_CONFIG_H)
-# include <config.h>
-#endif
-
-#include <sys/types.h>
-#include <fcntl.h>
-#include "posixjmp.h"
-
-#if defined (HAVE_UNISTD_H)
-# include <unistd.h> /* for _POSIX_VERSION */
-#endif /* HAVE_UNISTD_H */
-
-#if defined (HAVE_STDLIB_H)
-# include <stdlib.h>
-#else
-# include "ansi_stdlib.h"
-#endif /* HAVE_STDLIB_H */
-
-#include <stdio.h>
-#include <ctype.h>
-
-/* System-specific feature definitions and include files. */
-#include "rldefs.h"
-#include "rlmbutil.h"
-
-#if defined (TIOCSTAT_IN_SYS_IOCTL)
-# include <sys/ioctl.h>
-#endif /* TIOCSTAT_IN_SYS_IOCTL */
-
-/* Some standard library routines. */
-#include "readline.h"
-
-#include "rlprivate.h"
-#include "xmalloc.h"
-#include "rlshell.h"
-
-/* **************************************************************** */
-/* */
-/* Utility Functions */
-/* */
-/* **************************************************************** */
-
-/* Return 0 if C is not a member of the class of characters that belong
- in words, or 1 if it is. */
-
-int _rl_allow_pathname_alphabetic_chars = 0;
-static const char * const pathname_alphabetic_chars = "/-_=~.#$";
-
-int
-rl_alphabetic (int c)
-{
- if (ALPHABETIC (c))
- return (1);
-
- return (_rl_allow_pathname_alphabetic_chars &&
- strchr (pathname_alphabetic_chars, c) != NULL);
-}
-
-#if defined (HANDLE_MULTIBYTE)
-int
-_rl_walphabetic (wchar_t wc)
-{
- int c;
-
- if (iswalnum (wc))
- return (1);
-
- c = wc & 0177;
- return (_rl_allow_pathname_alphabetic_chars &&
- strchr (pathname_alphabetic_chars, c) != NULL);
-}
-#endif
-
-/* How to abort things. */
-int
-_rl_abort_internal (void)
-{
- rl_ding ();
- rl_clear_message ();
- _rl_reset_argument ();
- rl_clear_pending_input ();
-
- RL_UNSETSTATE (RL_STATE_MACRODEF);
- while (rl_executing_macro)
- _rl_pop_executing_macro ();
-
- RL_UNSETSTATE (RL_STATE_MULTIKEY); /* XXX */
-
- rl_last_func = (rl_command_func_t *)NULL;
-
- _rl_longjmp (_rl_top_level, 1);
- return (0);
-}
-
-int
-rl_abort (int count, int key)
-{
- return (_rl_abort_internal ());
-}
-
-int
-_rl_null_function (int count, int key)
-{
- return 0;
-}
-
-int
-rl_tty_status (int count, int key)
-{
-#if defined (TIOCSTAT)
- ioctl (1, TIOCSTAT, (char *)0);
- rl_refresh_line (count, key);
-#else
- rl_ding ();
-#endif
- return 0;
-}
-
-/* Return a copy of the string between FROM and TO.
- FROM is inclusive, TO is not. */
-char *
-rl_copy_text (int from, int to)
-{
- register int length;
- char *copy;
-
- /* Fix it if the caller is confused. */
- if (from > to)
- SWAP (from, to);
-
- length = to - from;
- copy = (char *)xmalloc (1 + length);
- strncpy (copy, rl_line_buffer + from, length);
- copy[length] = '\0';
- return (copy);
-}
-
-/* Increase the size of RL_LINE_BUFFER until it has enough space to hold
- LEN characters. */
-void
-rl_extend_line_buffer (int len)
-{
- while (len >= rl_line_buffer_len)
- {
- rl_line_buffer_len += DEFAULT_BUFFER_SIZE;
- rl_line_buffer = (char *)xrealloc (rl_line_buffer, rl_line_buffer_len);
- }
-
- _rl_set_the_line ();
-}
-
-
-/* A function for simple tilde expansion. */
-int
-rl_tilde_expand (int ignore, int key)
-{
- register int start, end;
- char *homedir, *temp;
- int len;
-
- end = rl_point;
- start = end - 1;
-
- if (rl_point == rl_end && rl_line_buffer[rl_point] == '~')
- {
- homedir = tilde_expand ("~");
- _rl_replace_text (homedir, start, end);
- xfree (homedir);
- return (0);
- }
- else if (start >= 0 && rl_line_buffer[start] != '~')
- {
- for (; start >= 0 && !whitespace (rl_line_buffer[start]); start--)
- ;
- start++;
- }
- else if (start < 0)
- start = 0;
-
- end = start;
- do
- end++;
- while (whitespace (rl_line_buffer[end]) == 0 && end < rl_end);
-
- if (whitespace (rl_line_buffer[end]) || end >= rl_end)
- end--;
-
- /* If the first character of the current word is a tilde, perform
- tilde expansion and insert the result. If not a tilde, do
- nothing. */
- if (rl_line_buffer[start] == '~')
- {
- len = end - start + 1;
- temp = (char *)xmalloc (len + 1);
- strncpy (temp, rl_line_buffer + start, len);
- temp[len] = '\0';
- homedir = tilde_expand (temp);
- xfree (temp);
-
- _rl_replace_text (homedir, start, end);
- xfree (homedir);
- }
-
- return (0);
-}
-
-#if defined (USE_VARARGS)
-void
-#if defined (PREFER_STDARG)
-_rl_ttymsg (const char *format, ...)
-#else
-_rl_ttymsg (va_alist)
- va_dcl
-#endif
-{
- va_list args;
-#if defined (PREFER_VARARGS)
- char *format;
-#endif
-
-#if defined (PREFER_STDARG)
- va_start (args, format);
-#else
- va_start (args);
- format = va_arg (args, char *);
-#endif
-
- fprintf (stderr, "readline: ");
- vfprintf (stderr, format, args);
- fprintf (stderr, "\n");
- fflush (stderr);
-
- va_end (args);
-
- rl_forced_update_display ();
-}
-
-void
-#if defined (PREFER_STDARG)
-_rl_errmsg (const char *format, ...)
-#else
-_rl_errmsg (va_alist)
- va_dcl
-#endif
-{
- va_list args;
-#if defined (PREFER_VARARGS)
- char *format;
-#endif
-
-#if defined (PREFER_STDARG)
- va_start (args, format);
-#else
- va_start (args);
- format = va_arg (args, char *);
-#endif
-
- fprintf (stderr, "readline: ");
- vfprintf (stderr, format, args);
- fprintf (stderr, "\n");
- fflush (stderr);
-
- va_end (args);
-}
-
-#else /* !USE_VARARGS */
-void
-_rl_ttymsg (format, arg1, arg2)
- char *format;
-{
- fprintf (stderr, "readline: ");
- fprintf (stderr, format, arg1, arg2);
- fprintf (stderr, "\n");
-
- rl_forced_update_display ();
-}
-
-void
-_rl_errmsg (format, arg1, arg2)
- char *format;
-{
- fprintf (stderr, "readline: ");
- fprintf (stderr, format, arg1, arg2);
- fprintf (stderr, "\n");
-}
-#endif /* !USE_VARARGS */
-
-/* **************************************************************** */
-/* */
-/* String Utility Functions */
-/* */
-/* **************************************************************** */
-
-/* Determine if s2 occurs in s1. If so, return a pointer to the
- match in s1. The compare is case insensitive. */
-char *
-_rl_strindex (const char *s1, const char *s2)
-{
- register int i, l, len;
-
- for (i = 0, l = strlen (s2), len = strlen (s1); (len - i) >= l; i++)
- if (_rl_strnicmp (s1 + i, s2, l) == 0)
- return ((char *) (s1 + i));
- return ((char *)NULL);
-}
-
-#ifndef HAVE_STRPBRK
-/* Find the first occurrence in STRING1 of any character from STRING2.
- Return a pointer to the character in STRING1. */
-char *
-_rl_strpbrk (const char *string1, const char *string2)
-{
- register const char *scan;
-#if defined (HANDLE_MULTIBYTE)
- mbstate_t ps;
- register int i, v;
-
- memset (&ps, 0, sizeof (mbstate_t));
-#endif
-
- for (; *string1; string1++)
- {
- for (scan = string2; *scan; scan++)
- {
- if (*string1 == *scan)
- return ((char *)string1);
- }
-#if defined (HANDLE_MULTIBYTE)
- if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
- {
- v = _rl_get_char_len (string1, &ps);
- if (v > 1)
- string1 += v - 1; /* -1 to account for auto-increment in loop */
- }
-#endif
- }
- return ((char *)NULL);
-}
-#endif
-
-#if !defined (HAVE_STRCASECMP)
-/* Compare at most COUNT characters from string1 to string2. Case
- doesn't matter (strncasecmp). */
-int
-_rl_strnicmp (const char *string1, const char *string2, int count)
-{
- register const char *s1;
- register const char *s2;
- register int d;
-
- if (count <= 0 || (string1 == string2))
- return 0;
-
- s1 = string1;
- s2 = string2;
- do
- {
- d = _rl_to_lower (*s1) - _rl_to_lower (*s2); /* XXX - cast to unsigned char? */
- if (d != 0)
- return d;
- if (*s1++ == '\0')
- break;
- s2++;
- }
- while (--count != 0);
-
- return (0);
-}
-
-/* strcmp (), but caseless (strcasecmp). */
-int
-_rl_stricmp (const char *string1, const char *string2)
-{
- register const char *s1;
- register const char *s2;
- register int d;
-
- s1 = string1;
- s2 = string2;
-
- if (s1 == s2)
- return 0;
-
- while ((d = _rl_to_lower (*s1) - _rl_to_lower (*s2)) == 0)
- {
- if (*s1++ == '\0')
- return 0;
- s2++;
- }
-
- return (d);
-}
-#endif /* !HAVE_STRCASECMP */
-
-/* Stupid comparison routine for qsort () ing strings. */
-int
-_rl_qsort_string_compare (char **s1, char **s2)
-{
-#if defined (HAVE_STRCOLL)
- return (strcoll (*s1, *s2));
-#else
- int result;
-
- result = **s1 - **s2;
- if (result == 0)
- result = strcmp (*s1, *s2);
-
- return result;
-#endif
-}
-
-/* Function equivalents for the macros defined in chardefs.h. */
-#define FUNCTION_FOR_MACRO(f) int (f) (int c) { return f (c); }
-
-FUNCTION_FOR_MACRO (_rl_digit_p)
-FUNCTION_FOR_MACRO (_rl_digit_value)
-FUNCTION_FOR_MACRO (_rl_lowercase_p)
-FUNCTION_FOR_MACRO (_rl_pure_alphabetic)
-FUNCTION_FOR_MACRO (_rl_to_lower)
-FUNCTION_FOR_MACRO (_rl_to_upper)
-FUNCTION_FOR_MACRO (_rl_uppercase_p)
-
-/* A convenience function, to force memory deallocation to be performed
- by readline. DLLs on Windows apparently require this. */
-void
-rl_free (void *mem)
-{
- if (mem)
- free (mem);
-}
-
-/* Backwards compatibility, now that savestring has been removed from
- all `public' readline header files. */
-#undef _rl_savestring
-char *
-_rl_savestring (const char *s)
-{
- return (strcpy ((char *)xmalloc (1 + (int)strlen (s)), (s)));
-}
-
-#if defined (DEBUG)
-#if defined (USE_VARARGS)
-static FILE *_rl_tracefp;
-
-void
-#if defined (PREFER_STDARG)
-_rl_trace (const char *format, ...)
-#else
-_rl_trace (va_alist)
- va_dcl
-#endif
-{
- va_list args;
-#if defined (PREFER_VARARGS)
- char *format;
-#endif
-
-#if defined (PREFER_STDARG)
- va_start (args, format);
-#else
- va_start (args);
- format = va_arg (args, char *);
-#endif
-
- if (_rl_tracefp == 0)
- _rl_tropen ();
- vfprintf (_rl_tracefp, format, args);
- fprintf (_rl_tracefp, "\n");
- fflush (_rl_tracefp);
-
- va_end (args);
-}
-
-int
-_rl_tropen (void)
-{
- char fnbuf[128], *x;
-
- if (_rl_tracefp)
- fclose (_rl_tracefp);
-#if defined (_WIN32) && !defined (__CYGWIN__)
- /* Windows doesn't have /var/tmp, so open the trace file in the
- user's temporary directory instead. */
- snprintf (fnbuf, sizeof (fnbuf), "%s/rltrace.%ld",
- (sh_get_env_value ("TEMP")
- ? sh_get_env_value ("TEMP")
- : "."),
- getpid ());
-#else
- sprintf (fnbuf, "/var/tmp/rltrace.%ld", (long) getpid ());
-#endif
- unlink (fnbuf);
- _rl_tracefp = fopen (fnbuf, "w+");
- return _rl_tracefp != 0;
-}
-
-int
-_rl_trclose (void)
-{
- int r;
-
- r = fclose (_rl_tracefp);
- _rl_tracefp = 0;
- return r;
-}
-
-void
-_rl_settracefp (FILE *fp)
-{
- _rl_tracefp = fp;
-}
-#endif
-#endif /* DEBUG */
-
-
-#if HAVE_DECL_AUDIT_USER_TTY && defined (HAVE_LIBAUDIT_H) && defined (ENABLE_TTY_AUDIT_SUPPORT)
-#include <sys/socket.h>
-#include <libaudit.h>
-#include <linux/audit.h>
-#include <linux/netlink.h>
-
-/* Report STRING to the audit system. */
-void
-_rl_audit_tty (char *string)
-{
- struct audit_message req;
- struct sockaddr_nl addr;
- size_t size;
- int fd;
-
- fd = socket (PF_NETLINK, SOCK_RAW, NETLINK_AUDIT);
- if (fd < 0)
- return;
- size = strlen (string) + 1;
-
- if (NLMSG_SPACE (size) > MAX_AUDIT_MESSAGE_LENGTH)
- return;
-
- memset (&req, 0, sizeof(req));
- req.nlh.nlmsg_len = NLMSG_SPACE (size);
- req.nlh.nlmsg_type = AUDIT_USER_TTY;
- req.nlh.nlmsg_flags = NLM_F_REQUEST;
- req.nlh.nlmsg_seq = 0;
- if (size && string)
- memcpy (NLMSG_DATA(&req.nlh), string, size);
- memset (&addr, 0, sizeof(addr));
-
- addr.nl_family = AF_NETLINK;
- addr.nl_pid = 0;
- addr.nl_groups = 0;
-
- sendto (fd, &req, req.nlh.nlmsg_len, 0, (struct sockaddr*)&addr, sizeof(addr));
- close (fd);
-}
-#endif
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