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Fix stair-stepped output when the output of a sudo command is piped

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to another command and use_pty is set.
This commit is contained in:
Todd C. Miller
2017-09-26 14:21:11 -06:00
parent 1051cf1e6f
commit 3b88cdfcd8
2 changed files with 14 additions and 0 deletions
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8
src/exec_pty.c
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@@ -17,6 +17,7 @@
#include <config.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <sys/ioctl.h>
@@ -1159,6 +1160,7 @@ exec_pty(struct command_details *details, struct command_status *cstat)
struct plugin_container *plugin;
sigset_t set, oset;
struct sigaction sa;
struct stat sb;
pid_t ppgrp;
int sv[2];
debug_decl(exec_pty, SUDO_DEBUG_EXEC)
@@ -1259,6 +1261,8 @@ exec_pty(struct command_details *details, struct command_status *cstat)
/* Not logging stdin, do not interpose. */
sudo_debug_printf(SUDO_DEBUG_INFO,
"stdin not a tty, not logging");
if (fstat(STDIN_FILENO, &sb) == 0 && S_ISFIFO(sb.st_mode))
pipeline = true;
io_fds[SFD_STDIN] = dup(STDIN_FILENO);
if (io_fds[SFD_STDIN] == -1)
sudo_fatal("dup");
@@ -1278,6 +1282,8 @@ exec_pty(struct command_details *details, struct command_status *cstat)
/* Not logging stdout, do not interpose. */
sudo_debug_printf(SUDO_DEBUG_INFO,
"stdout not a tty, not logging");
if (fstat(STDOUT_FILENO, &sb) == 0 && S_ISFIFO(sb.st_mode))
pipeline = true;
io_fds[SFD_STDOUT] = dup(STDOUT_FILENO);
if (io_fds[SFD_STDOUT] == -1)
sudo_fatal("dup");
@@ -1297,6 +1303,8 @@ exec_pty(struct command_details *details, struct command_status *cstat)
/* Not logging stderr, do not interpose. */
sudo_debug_printf(SUDO_DEBUG_INFO,
"stderr not a tty, not logging");
if (fstat(STDERR_FILENO, &sb) == 0 && S_ISFIFO(sb.st_mode))
pipeline = true;
io_fds[SFD_STDERR] = dup(STDERR_FILENO);
if (io_fds[SFD_STDERR] == -1)
sudo_fatal("dup");