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There is no longer a reason for the plugin to init the debug subsystem

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itself.  It will always be initialized by the front-end if needed.
This commit is contained in:
Todd C. Miller
2014-09-08 16:24:32 -06:00
parent 0f735f6581
commit e20475922d
5 changed files with 32 additions and 128 deletions
Download Patch File Download Diff File Expand all files Collapse all files

109
lib/util/sudo_debug.c
View File

@@ -64,7 +64,7 @@
*/
/* Note: this must match the order in sudo_debug.h */
const char *const sudo_debug_priorities[] = {
static const char *const sudo_debug_priorities[] = {
"crit",
"err",
"warn",
@@ -77,7 +77,7 @@ const char *const sudo_debug_priorities[] = {
};
/* Note: this must match the order in sudo_debug.h */
const char *const sudo_debug_subsystems[] = {
static const char *const sudo_debug_subsystems[] = {
"main",
"args",
"exec",
@@ -110,21 +110,13 @@ const char *const sudo_debug_subsystems[] = {
#define NUM_SUBSYSTEMS (sizeof(sudo_debug_subsystems) / sizeof(sudo_debug_subsystems[0]) - 1)
/* Values for sudo_debug_mode */
#define SUDO_DEBUG_MODE_DISABLED 0
#define SUDO_DEBUG_MODE_FILE 1
#define SUDO_DEBUG_MODE_CONV 2
static int sudo_debug_settings[NUM_SUBSYSTEMS];
static int sudo_debug_fd = -1;
static int sudo_debug_mode;
static bool sudo_debug_initialized;
static char sudo_debug_pidstr[(((sizeof(int) * 8) + 2) / 3) + 3];
static size_t sudo_debug_pidlen;
static const int num_subsystems = NUM_SUBSYSTEMS;
/* Exposed for sudo_printf.c */
void sudo_debug_write_file(const char *func, const char *file, int line, const char *str, int len, int errno_val);
/*
* Parse settings string from sudo.conf and open debugfile.
* Returns 1 on success, 0 if cannot open debugfile.
@@ -136,34 +128,33 @@ int sudo_debug_init(const char *debugfile, const char *settings)
int i, j;
/* Make sure we are not already initialized. */
if (sudo_debug_mode != SUDO_DEBUG_MODE_DISABLED)
if (sudo_debug_initialized)
return 1;
/* A debug file name is required. */
if (debugfile == NULL)
return 1;
/* Init per-subsystems settings to -1 since 0 is a valid priority. */
for (i = 0; i < num_subsystems; i++)
sudo_debug_settings[i] = -1;
/* Open debug file if specified. */
if (debugfile != NULL) {
if (sudo_debug_fd != -1)
close(sudo_debug_fd);
sudo_debug_fd = open(debugfile, O_WRONLY|O_APPEND, S_IRUSR|S_IWUSR);
if (sudo_debug_fd == -1) {
/* Create debug file as needed and set group ownership. */
if (errno == ENOENT) {
sudo_debug_fd = open(debugfile, O_WRONLY|O_APPEND|O_CREAT,
S_IRUSR|S_IWUSR);
}
if (sudo_debug_fd == -1)
return 0;
ignore_result(fchown(sudo_debug_fd, (uid_t)-1, 0));
/* Open debug file. */
if (sudo_debug_fd != -1)
close(sudo_debug_fd);
sudo_debug_fd = open(debugfile, O_WRONLY|O_APPEND, S_IRUSR|S_IWUSR);
if (sudo_debug_fd == -1) {
/* Create debug file as needed and set group ownership. */
if (errno == ENOENT) {
sudo_debug_fd = open(debugfile, O_WRONLY|O_APPEND|O_CREAT,
S_IRUSR|S_IWUSR);
}
(void)fcntl(sudo_debug_fd, F_SETFD, FD_CLOEXEC);
sudo_debug_mode = SUDO_DEBUG_MODE_FILE;
} else {
/* Called from the plugin, no debug file. */
sudo_debug_mode = SUDO_DEBUG_MODE_CONV;
if (sudo_debug_fd == -1)
return 0;
ignore_result(fchown(sudo_debug_fd, (uid_t)-1, 0));
}
(void)fcntl(sudo_debug_fd, F_SETFD, FD_CLOEXEC);
sudo_debug_initialized = true;
/* Stash the pid string so we only have to format it once. */
(void)snprintf(sudo_debug_pidstr, sizeof(sudo_debug_pidstr), "[%d] ",
@@ -298,44 +289,8 @@ sudo_debug_exit_ptr(const char *func, const char *file, int line,
"<- %s @ %s:%d := %p", func, file, line, rval);
}
static void
sudo_debug_write_conv(const char *func, const char *file, int lineno,
const char *str, int len, int errnum)
{
/* Remove trailing newlines. */
while (len > 0 && str[len - 1] == '\n')
len--;
if (len > 0) {
if (func != NULL && file != NULL) {
if (errnum) {
sudo_printf(SUDO_CONV_DEBUG_MSG, "%.*s: %s @ %s() %s:%d",
len, str, strerror(errnum), func, file, lineno);
} else {
sudo_printf(SUDO_CONV_DEBUG_MSG, "%.*s @ %s() %s:%d",
len, str, func, file, lineno);
}
} else {
if (errnum) {
sudo_printf(SUDO_CONV_DEBUG_MSG, "%.*s: %s",
len, str, strerror(errnum));
} else {
sudo_printf(SUDO_CONV_DEBUG_MSG, "%.*s", len, str);
}
}
} else if (errnum) {
/* Only print error string. */
if (func != NULL && file != NULL) {
sudo_printf(SUDO_CONV_DEBUG_MSG, "%s @ %s() %s:%d",
strerror(errnum), func, file, lineno);
} else {
sudo_printf(SUDO_CONV_DEBUG_MSG, "%s", strerror(errnum));
}
}
}
void
sudo_debug_write_file(const char *func, const char *file, int lineno,
sudo_debug_write2(const char *func, const char *file, int lineno,
const char *str, int len, int errnum)
{
char *timestr, numbuf[(((sizeof(int) * 8) + 2) / 3) + 2];
@@ -411,20 +366,6 @@ sudo_debug_write_file(const char *func, const char *file, int lineno,
ignore_result(writev(sudo_debug_fd, iov, iovcnt));
}
void
sudo_debug_write2(const char *func, const char *file, int lineno,
const char *str, int len, int errnum)
{
switch (sudo_debug_mode) {
case SUDO_DEBUG_MODE_CONV:
sudo_debug_write_conv(func, file, lineno, str, len, errnum);
break;
case SUDO_DEBUG_MODE_FILE:
sudo_debug_write_file(func, file, lineno, str, len, errnum);
break;
}
}
void
sudo_debug_vprintf2(const char *func, const char *file, int lineno, int level,
const char *fmt, va_list ap)
@@ -432,7 +373,7 @@ sudo_debug_vprintf2(const char *func, const char *file, int lineno, int level,
int buflen, pri, subsys, saved_errno = errno;
char static_buf[1024], *buf = static_buf;
if (!sudo_debug_mode)
if (!sudo_debug_initialized)
return;
/* Extract pri and subsystem from level. */
@@ -491,7 +432,7 @@ sudo_debug_execve2(int level, const char *path, char *const argv[], char *const
int buflen, pri, subsys, log_envp = 0;
size_t plen;
if (!sudo_debug_mode)
if (!sudo_debug_initialized)
return;
/* Extract pri and subsystem from level. */

15
lib/util/sudo_printf.c
View File

@@ -33,15 +33,11 @@
#include "sudo_plugin.h"
#include "sudo_debug.h"
/* Not exported outside libsudo_util */
void sudo_debug_write_file(const char *func, const char *file, int line, const char *str, int len, int errno_val);
__dso_public int
_sudo_printf(int msg_type, const char *fmt, ...)
{
va_list ap;
char *buf;
int len = -1;
int len;
switch (msg_type) {
case SUDO_CONV_INFO_MSG:
@@ -54,15 +50,8 @@ _sudo_printf(int msg_type, const char *fmt, ...)
len = vfprintf(stderr, fmt, ap);
va_end(ap);
break;
case SUDO_CONV_DEBUG_MSG:
/* XXX - add debug version of vfprintf()? */
va_start(ap, fmt);
len = vasprintf(&buf, fmt, ap);
va_end(ap);
if (len != -1)
sudo_debug_write_file(NULL, NULL, 0, buf, len, 0);
break;
default:
len = -1;
errno = EINVAL;
break;
}