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Add an fd argument to sudo_get_ttysize() instead of always using stderr.

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For sudoreplay we open /dev/tty, so use that instead of stderr when
determining the terminal size.
This commit is contained in:
Todd C. Miller
2023-04-16 15:45:19 -06:00
parent 5650b436e6
commit cc22cca34f
6 changed files with 18 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
include/sudo_util.h
View File

@@ -1,7 +1,7 @@
/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2013-2022 Todd C. Miller <Todd.Miller@sudo.ws>
* Copyright (c) 2013-2023 Todd C. Miller <Todd.Miller@sudo.ws>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@@ -336,7 +336,8 @@ sudo_dso_public char *sudo_ttyname_dev_v1(dev_t tdev, char *name, size_t namelen
/* ttysize.c */
sudo_dso_public void sudo_get_ttysize_v1(int *rowp, int *colp);
#define sudo_get_ttysize(_a, _b) sudo_get_ttysize_v1((_a), (_b))
sudo_dso_public void sudo_get_ttysize_v2(int fd, int *rowp, int *colp);
#define sudo_get_ttysize(_a, _b, _c) sudo_get_ttysize_v2((_a), (_b), (_c))
/* uuid.c */
sudo_dso_public void sudo_uuid_create_v1(unsigned char uuid_out[16]);

14
lib/util/ttysize.c
View File

@@ -1,7 +1,7 @@
/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2010-2012, 2014-2015 Todd C. Miller <Todd.Miller@sudo.ws>
* Copyright (c) 2010-2012, 2014-2015, 2023 Todd C. Miller <Todd.Miller@sudo.ws>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@@ -34,12 +34,12 @@
#include "sudo_util.h"
static int
get_ttysize_ioctl(int *rowp, int *colp)
get_ttysize_ioctl(int fd, int *rowp, int *colp)
{
struct winsize wsize;
debug_decl(get_ttysize_ioctl, SUDO_DEBUG_UTIL);
if (isatty(STDERR_FILENO) && ioctl(STDERR_FILENO, TIOCGWINSZ, &wsize) == 0) {
if (isatty(fd) && ioctl(fd, TIOCGWINSZ, &wsize) == 0) {
if (wsize.ws_row != 0 && wsize.ws_col != 0) {
*rowp = wsize.ws_row;
*colp = wsize.ws_col;
@@ -51,10 +51,16 @@ get_ttysize_ioctl(int *rowp, int *colp)
void
sudo_get_ttysize_v1(int *rowp, int *colp)
{
sudo_get_ttysize_v2(STDERR_FILENO, rowp, colp);
}
void
sudo_get_ttysize_v2(int fd, int *rowp, int *colp)
{
debug_decl(sudo_get_ttysize, SUDO_DEBUG_UTIL);
if (get_ttysize_ioctl(rowp, colp) == -1) {
if (get_ttysize_ioctl(fd, rowp, colp) == -1) {
char *p;
/* Fall back on $LINES and $COLUMNS. */

1
lib/util/util.exp.in
View File

@@ -83,6 +83,7 @@ sudo_gai_vfatal_nodebug_v1
sudo_gai_vwarn_nodebug_v1
sudo_gai_warn_nodebug_v1
sudo_get_ttysize_v1
sudo_get_ttysize_v2
sudo_getgrouplist2_v1
sudo_gethostname_v1
sudo_gettime_awake_v1

2
plugins/sudoers/sudoreplay.c
View File

@@ -660,7 +660,7 @@ setup_terminal(struct eventlog *evlog, bool interactive, bool resize)
if (!terminal_can_resize) {
/* either not xterm or not interactive */
sudo_get_ttysize(&terminal_lines, &terminal_cols);
sudo_get_ttysize(ttyfd, &terminal_lines, &terminal_cols);
}
if (evlog->lines == terminal_lines && evlog->columns == terminal_cols) {

4
src/parse_args.c
View File

@@ -755,7 +755,7 @@ usage(void)
{
int rows, cols;
sudo_get_ttysize(&rows, &cols);
sudo_get_ttysize(STDERR_FILENO, &rows, &cols);
display_usage(usage_err, cols);
exit(EXIT_FAILURE);
}
@@ -796,7 +796,7 @@ help(void)
int rows, cols;
debug_decl(help, SUDO_DEBUG_ARGS);
sudo_get_ttysize(&rows, &cols);
sudo_get_ttysize(STDERR_FILENO, &rows, &cols);
sudo_lbuf_init(&lbuf, usage_out, indent, NULL, cols);
if (strcmp(pname, "sudoedit") == 0) {
sudoedit = true;

2
src/sudo.c
View File

@@ -623,7 +623,7 @@ get_user_info(struct user_details *ud)
goto oom;
ud->host = info[i] + sizeof("host=") - 1;
sudo_get_ttysize(&ud->ts_rows, &ud->ts_cols);
sudo_get_ttysize(STDERR_FILENO, &ud->ts_rows, &ud->ts_cols);
if (asprintf(&info[++i], "lines=%d", ud->ts_rows) == -1)
goto oom;
if (asprintf(&info[++i], "cols=%d", ud->ts_cols) == -1)