Some more functions for our BSD compatibility library.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18436 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler
@@ -6,8 +6,11 @@ UseHeaders [ FDirName $(HAIKU_TOP) headers compatibility bsd ] : true ;
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SharedLibrary libbsd.so :
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err.c
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fgetln.c
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getpass.c
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issetugid.c
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progname.c
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stringlist.c
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unvis.c
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vis.c
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;
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@@ -0,0 +1,66 @@
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/*
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* Copyright 2006, Haiku, Inc. All Rights Reserved.
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* Distributed under the terms of the MIT License.
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*
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* Authors:
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* Axel Dörfler, [email protected]
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#define LINE_LENGTH 4096
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char *
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fgetln(FILE *stream, size_t *_length)
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{
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// TODO: this function is not thread-safe
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static size_t sBufferSize;
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static char *sBuffer;
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size_t length, left;
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char *line;
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if (sBuffer == NULL) {
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sBuffer = (char *)malloc(LINE_LENGTH);
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if (sBuffer == NULL)
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return NULL;
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sBufferSize = LINE_LENGTH;
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}
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line = sBuffer;
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left = sBufferSize;
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for (;;) {
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line = fgets(line, left, stream);
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if (line == NULL) {
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free(sBuffer);
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sBuffer = NULL;
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return NULL;
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}
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length = strlen(line);
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if (line[length - 1] != '\n' && length == sBufferSize - 1) {
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// more data is following, enlarge buffer
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char *newBuffer = realloc(sBuffer, sBufferSize + LINE_LENGTH);
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if (newBuffer == NULL) {
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free(sBuffer);
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sBuffer = NULL;
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return NULL;
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}
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sBuffer = newBuffer;
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sBufferSize += LINE_LENGTH;
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line = sBuffer + length;
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left += 1;
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} else
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break;
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}
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return sBuffer;
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}
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@@ -0,0 +1,54 @@
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/*
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* Copyright 2006, Haiku, Inc. All Rights Reserved.
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* Distributed under the terms of the MIT License.
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*
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* Authors:
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* Axel Dörfler, [email protected]
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*/
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#include <stdbool.h>
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#include <stdio.h>
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#include <termios.h>
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#include <unistd.h>
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char *
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getpass(const char *prompt)
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{
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static char password[128];
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struct termios termios;
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bool changed = false;
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// Turn off echo
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if (tcgetattr(fileno(stdin), &termios) == 0) {
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struct termios noEchoTermios = termios;
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noEchoTermios.c_lflag &= ~(ECHO | ISIG);
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changed = tcsetattr(fileno(stdin), TCSAFLUSH, &noEchoTermios) == 0;
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}
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// Show prompt
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fputs(prompt, stdout);
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fflush(stdout);
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// Read password
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if (fgets(password, sizeof(password), stdin) != NULL) {
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size_t length = strlen(password);
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if (password[length - 1] == '\n')
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password[length - 1] = '\0';
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if (changed) {
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// Manually move to the next line
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putchar('\n');
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}
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}
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// Restore termios setting
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if (changed)
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tcsetattr(fileno(stdin), TCSAFLUSH, &termios);
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return password;
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}
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@@ -0,0 +1,297 @@
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/*-
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* Copyright (c) 1989, 1993
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)unvis.c 8.1 (Berkeley) 6/4/93";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD: src/lib/libc/gen/unvis.c,v 1.9 2004/08/02 08:46:23 stefanf Exp $");
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#include <sys/types.h>
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#include <ctype.h>
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#include <vis.h>
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/*
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* decode driven by state machine
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*/
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#define S_GROUND 0 /* haven't seen escape char */
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#define S_START 1 /* start decoding special sequence */
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#define S_META 2 /* metachar started (M) */
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#define S_META1 3 /* metachar more, regular char (-) */
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#define S_CTRL 4 /* control char started (^) */
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#define S_OCTAL2 5 /* octal digit 2 */
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#define S_OCTAL3 6 /* octal digit 3 */
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#define S_HEX2 7 /* hex digit 2 */
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#define S_HTTP 0x080 /* %HEXHEX escape */
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#define isoctal(c) (((u_char)(c)) >= '0' && ((u_char)(c)) <= '7')
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#define ishex(c) ((((u_char)(c)) >= '0' && ((u_char)(c)) <= '9') || (((u_char)(c)) >= 'a' && ((u_char)(c)) <= 'f'))
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/*
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* unvis - decode characters previously encoded by vis
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*/
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int
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unvis(char *cp, int c, int *astate, int flag)
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{
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if (flag & UNVIS_END) {
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if (*astate == S_OCTAL2 || *astate == S_OCTAL3) {
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*astate = S_GROUND;
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return (UNVIS_VALID);
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}
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return (*astate == S_GROUND ? UNVIS_NOCHAR : UNVIS_SYNBAD);
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}
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switch (*astate & ~S_HTTP) {
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case S_GROUND:
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*cp = 0;
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if (c == '\\') {
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*astate = S_START;
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return (0);
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}
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if (flag & VIS_HTTPSTYLE && c == '%') {
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*astate = S_START | S_HTTP;
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return (0);
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}
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*cp = c;
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return (UNVIS_VALID);
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case S_START:
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if (*astate & S_HTTP) {
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if (ishex(tolower(c))) {
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*cp = isdigit(c) ? (c - '0') : (tolower(c) - 'a');
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*astate = S_HEX2;
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return (0);
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}
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}
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switch(c) {
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case '\\':
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*cp = c;
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*astate = S_GROUND;
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return (UNVIS_VALID);
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case '0': case '1': case '2': case '3':
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case '4': case '5': case '6': case '7':
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*cp = (c - '0');
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*astate = S_OCTAL2;
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return (0);
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case 'M':
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*cp = 0200;
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*astate = S_META;
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return (0);
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case '^':
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*astate = S_CTRL;
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return (0);
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case 'n':
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*cp = '\n';
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*astate = S_GROUND;
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return (UNVIS_VALID);
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case 'r':
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*cp = '\r';
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*astate = S_GROUND;
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return (UNVIS_VALID);
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case 'b':
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*cp = '\b';
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*astate = S_GROUND;
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return (UNVIS_VALID);
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case 'a':
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*cp = '\007';
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*astate = S_GROUND;
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return (UNVIS_VALID);
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case 'v':
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*cp = '\v';
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*astate = S_GROUND;
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return (UNVIS_VALID);
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case 't':
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*cp = '\t';
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*astate = S_GROUND;
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return (UNVIS_VALID);
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case 'f':
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*cp = '\f';
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*astate = S_GROUND;
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return (UNVIS_VALID);
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case 's':
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*cp = ' ';
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*astate = S_GROUND;
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return (UNVIS_VALID);
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case 'E':
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*cp = '\033';
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*astate = S_GROUND;
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return (UNVIS_VALID);
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case '\n':
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/*
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* hidden newline
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*/
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*astate = S_GROUND;
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return (UNVIS_NOCHAR);
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case '$':
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/*
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* hidden marker
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*/
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*astate = S_GROUND;
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return (UNVIS_NOCHAR);
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}
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*astate = S_GROUND;
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return (UNVIS_SYNBAD);
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case S_META:
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if (c == '-')
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*astate = S_META1;
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else if (c == '^')
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*astate = S_CTRL;
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else {
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*astate = S_GROUND;
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return (UNVIS_SYNBAD);
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}
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return (0);
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case S_META1:
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*astate = S_GROUND;
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*cp |= c;
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return (UNVIS_VALID);
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case S_CTRL:
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if (c == '?')
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*cp |= 0177;
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else
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*cp |= c & 037;
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*astate = S_GROUND;
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return (UNVIS_VALID);
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case S_OCTAL2: /* second possible octal digit */
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if (isoctal(c)) {
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/*
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* yes - and maybe a third
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*/
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*cp = (*cp << 3) + (c - '0');
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*astate = S_OCTAL3;
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return (0);
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}
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/*
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* no - done with current sequence, push back passed char
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*/
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*astate = S_GROUND;
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return (UNVIS_VALIDPUSH);
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case S_OCTAL3: /* third possible octal digit */
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*astate = S_GROUND;
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if (isoctal(c)) {
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*cp = (*cp << 3) + (c - '0');
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return (UNVIS_VALID);
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}
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/*
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* we were done, push back passed char
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*/
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return (UNVIS_VALIDPUSH);
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case S_HEX2: /* second mandatory hex digit */
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if (ishex(tolower(c))) {
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*cp = (isdigit(c) ? (*cp << 4) + (c - '0') : (*cp << 4) + (tolower(c) - 'a' + 10));
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}
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*astate = S_GROUND;
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return (UNVIS_VALID);
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default:
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/*
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* decoder in unknown state - (probably uninitialized)
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*/
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*astate = S_GROUND;
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return (UNVIS_SYNBAD);
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}
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}
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/*
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* strunvis - decode src into dst
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*
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* Number of chars decoded into dst is returned, -1 on error.
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* Dst is null terminated.
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*/
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int
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strunvis(char *dst, const char *src)
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{
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char c;
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char *start = dst;
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int state = 0;
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while ( (c = *src++) ) {
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again:
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switch (unvis(dst, c, &state, 0)) {
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case UNVIS_VALID:
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dst++;
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break;
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case UNVIS_VALIDPUSH:
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dst++;
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goto again;
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case 0:
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case UNVIS_NOCHAR:
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break;
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default:
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return (-1);
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}
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}
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if (unvis(dst, c, &state, UNVIS_END) == UNVIS_VALID)
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dst++;
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*dst = '\0';
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return (dst - start);
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}
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int
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strunvisx(char *dst, const char *src, int flag)
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{
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char c;
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char *start = dst;
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int state = 0;
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while ( (c = *src++) ) {
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again:
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switch (unvis(dst, c, &state, flag)) {
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case UNVIS_VALID:
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dst++;
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break;
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case UNVIS_VALIDPUSH:
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dst++;
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goto again;
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case 0:
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case UNVIS_NOCHAR:
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break;
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default:
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return (-1);
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}
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}
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if (unvis(dst, c, &state, UNVIS_END) == UNVIS_VALID)
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dst++;
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*dst = '\0';
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return (dst - start);
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}
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