File: [local] / src / usr.bin / sudo / Attic / lbuf.c (download)
Revision 1.5, Thu Dec 12 22:59:25 2013 UTC (10 years, 5 months ago) by naddy
Branch: MAIN
CVS Tags: OPENBSD_5_7_BASE, OPENBSD_5_7, OPENBSD_5_6_BASE, OPENBSD_5_6, OPENBSD_5_5_BASE, OPENBSD_5_5 Changes since 1.4: +7 -7 lines
handle ttysize/TIOCGSIZE as a fallback for winsize/TIOCGWINSZ, not the
other way around; ok millert@
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/*
* Copyright (c) 2007-2009 Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <config.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/ioctl.h>
#include <stdio.h>
#ifdef STDC_HEADERS
# include <stdlib.h>
# include <stddef.h>
#else
# ifdef HAVE_STDLIB_H
# include <stdlib.h>
# endif
#endif /* STDC_HEADERS */
#ifdef HAVE_STRING_H
# include <string.h>
#else
# ifdef HAVE_STRINGS_H
# include <strings.h>
# endif
#endif /* HAVE_STRING_H */
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif /* HAVE_UNISTD_H */
#include <ctype.h>
#ifdef HAVE_TERMIOS_H
# include <termios.h>
#else
# ifdef HAVE_TERMIO_H
# include <termio.h>
# endif
#endif
#include "sudo.h"
#include "lbuf.h"
#if !defined(TIOCGWINSZ) && defined(TIOCGSIZE)
# define TIOCGWINSZ TIOCGSIZE
# define winsize ttysize
# define ws_col ts_cols
#endif
int
get_ttycols()
{
char *p;
int cols;
#ifdef TIOCGSIZE
struct winsize win;
if (ioctl(STDERR_FILENO, TIOCGWINSZ, &win) == 0 && win.ws_col != 0)
return((int)win.ws_col);
#endif
/* Fall back on $COLUMNS. */
if ((p = getenv("COLUMNS")) == NULL || (cols = atoi(p)) <= 0)
cols = 80;
return(cols);
}
/*
* TODO: add support for embedded newlines in lbufs
*/
void
lbuf_init(lbuf, buf, indent, continuation)
struct lbuf *lbuf;
char *buf;
int indent;
int continuation;
{
lbuf->continuation = continuation;
lbuf->indent = indent;
lbuf->len = 0;
lbuf->size = 0;
lbuf->buf = NULL;
}
void
lbuf_destroy(lbuf)
struct lbuf *lbuf;
{
efree(lbuf->buf);
lbuf->buf = NULL;
}
/*
* Append strings to the buffer, expanding it as needed.
*/
void
#ifdef __STDC__
lbuf_append_quoted(struct lbuf *lbuf, const char *set, ...)
#else
lbuf_append_quoted(lbuf, set, va_alist)
struct lbuf *lbuf;
const char *set;
va_dcl
#endif
{
va_list ap;
int len = 0;
char *cp, *s;
#ifdef __STDC__
va_start(ap, set);
#else
va_start(ap);
#endif
while ((s = va_arg(ap, char *)) != NULL) {
len += strlen(s);
for (cp = s; (cp = strpbrk(cp, set)) != NULL; cp++)
len++;
}
va_end(ap);
/* Expand buffer as needed. */
if (lbuf->len + len >= lbuf->size) {
do {
lbuf->size += 256;
} while (lbuf->len + len >= lbuf->size);
lbuf->buf = erealloc(lbuf->buf, lbuf->size);
}
#ifdef __STDC__
va_start(ap, set);
#else
va_start(ap);
#endif
/* Append each string. */
while ((s = va_arg(ap, char *)) != NULL) {
while ((cp = strpbrk(s, set)) != NULL) {
len = (int)(cp - s);
memcpy(lbuf->buf + lbuf->len, s, len);
lbuf->len += len;
lbuf->buf[lbuf->len++] = '\\';
lbuf->buf[lbuf->len++] = *cp;
s = cp + 1;
}
if (*s != '\0') {
len = strlen(s);
memcpy(lbuf->buf + lbuf->len, s, len);
lbuf->len += len;
}
}
lbuf->buf[lbuf->len] = '\0';
va_end(ap);
}
/*
* Append strings to the buffer, expanding it as needed.
*/
void
#ifdef __STDC__
lbuf_append(struct lbuf *lbuf, ...)
#else
lbuf_append(lbuf, va_alist)
struct lbuf *lbuf;
va_dcl
#endif
{
va_list ap;
int len = 0;
char *s;
#ifdef __STDC__
va_start(ap, lbuf);
#else
va_start(ap);
#endif
while ((s = va_arg(ap, char *)) != NULL)
len += strlen(s);
va_end(ap);
/* Expand buffer as needed. */
if (lbuf->len + len >= lbuf->size) {
do {
lbuf->size += 256;
} while (lbuf->len + len >= lbuf->size);
lbuf->buf = erealloc(lbuf->buf, lbuf->size);
}
#ifdef __STDC__
va_start(ap, lbuf);
#else
va_start(ap);
#endif
/* Append each string. */
while ((s = va_arg(ap, char *)) != NULL) {
len = strlen(s);
memcpy(lbuf->buf + lbuf->len, s, len);
lbuf->len += len;
}
lbuf->buf[lbuf->len] = '\0';
va_end(ap);
}
/*
* Print the buffer with word wrap based on the tty width.
* The lbuf is reset on return.
*/
void
lbuf_print(lbuf)
struct lbuf *lbuf;
{
char *cp;
int i, have, contlen;
static int cols = -1;
if (cols == -1)
cols = get_ttycols();
contlen = lbuf->continuation ? 2 : 0;
/* For very small widths just give up... */
if (cols <= lbuf->indent + contlen + 20) {
puts(lbuf->buf);
goto done;
}
/*
* Print the buffer, splitting the line as needed on a word
* boundary.
*/
cp = lbuf->buf;
have = cols;
while (cp != NULL && *cp != '\0') {
char *ep = NULL;
int need = lbuf->len - (int)(cp - lbuf->buf);
if (need > have) {
have -= contlen; /* subtract for continuation char */
if ((ep = memrchr(cp, ' ', have)) == NULL)
ep = memchr(cp + have, ' ', need - have);
if (ep != NULL)
need = (int)(ep - cp);
}
if (cp != lbuf->buf) {
/* indent continued lines */
for (i = 0; i < lbuf->indent; i++)
putchar(' ');
}
fwrite(cp, need, 1, stdout);
cp = ep;
/*
* If there is more to print, reset have, incremement cp past
* the whitespace, and print a line continuaton char if needed.
*/
if (cp != NULL) {
have = cols - lbuf->indent;
do {
cp++;
} while (isspace((unsigned char)*cp));
if (lbuf->continuation) {
putchar(' ');
putchar(lbuf->continuation);
}
}
putchar('\n');
}
done:
lbuf->len = 0; /* reset the buffer for re-use. */
}