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-rw-r--r--source3/smbd/chgpasswd.c50
1 files changed, 30 insertions, 20 deletions
diff --git a/source3/smbd/chgpasswd.c b/source3/smbd/chgpasswd.c
index a277e729bf..5ccf3ed9da 100644
--- a/source3/smbd/chgpasswd.c
+++ b/source3/smbd/chgpasswd.c
@@ -61,28 +61,30 @@ static NTSTATUS check_oem_password(const char *user,
static int findpty(char **slave)
{
- int master;
- static fstring line;
- SMB_STRUCT_DIR *dirp;
+ int master = -1;
+ char *line = NULL;
+ SMB_STRUCT_DIR *dirp = NULL;
const char *dpname;
+ *slave = NULL;
+
#if defined(HAVE_GRANTPT)
/* Try to open /dev/ptmx. If that fails, fall through to old method. */
- if ((master = sys_open("/dev/ptmx", O_RDWR, 0)) >= 0)
- {
+ if ((master = sys_open("/dev/ptmx", O_RDWR, 0)) >= 0) {
grantpt(master);
unlockpt(master);
- *slave = (char *)ptsname(master);
- if (*slave == NULL)
- {
+ line = (char *)ptsname(master);
+ if (line) {
+ *slave = SMB_STRDUP(line);
+ }
+
+ if (*slave == NULL) {
DEBUG(0,
("findpty: Unable to create master/slave pty pair.\n"));
/* Stop fd leak on error. */
close(master);
return -1;
- }
- else
- {
+ } else {
DEBUG(10,
("findpty: Allocated slave pty %s\n", *slave));
return (master);
@@ -90,22 +92,25 @@ static int findpty(char **slave)
}
#endif /* HAVE_GRANTPT */
- fstrcpy(line, "/dev/ptyXX");
+ line = SMB_STRDUP("/dev/ptyXX");
+ if (!line) {
+ return (-1);
+ }
dirp = sys_opendir("/dev");
- if (!dirp)
+ if (!dirp) {
+ SAFE_FREE(line);
return (-1);
- while ((dpname = readdirname(dirp)) != NULL)
- {
- if (strncmp(dpname, "pty", 3) == 0 && strlen(dpname) == 5)
- {
+ }
+
+ while ((dpname = readdirname(dirp)) != NULL) {
+ if (strncmp(dpname, "pty", 3) == 0 && strlen(dpname) == 5) {
DEBUG(3,
("pty: try to open %s, line was %s\n", dpname,
line));
line[8] = dpname[3];
line[9] = dpname[4];
- if ((master = sys_open(line, O_RDWR, 0)) >= 0)
- {
+ if ((master = sys_open(line, O_RDWR, 0)) >= 0) {
DEBUG(3, ("pty: opened %s\n", line));
line[5] = 't';
*slave = line;
@@ -115,6 +120,7 @@ static int findpty(char **slave)
}
}
sys_closedir(dirp);
+ SAFE_FREE(line);
return (-1);
}
@@ -355,7 +361,7 @@ static int talktochild(int master, const char *seq)
static bool chat_with_program(char *passwordprogram, const struct passwd *pass,
char *chatsequence, bool as_root)
{
- char *slavedev;
+ char *slavedev = NULL;
int master;
pid_t pid, wpid;
int wstat;
@@ -381,6 +387,7 @@ static bool chat_with_program(char *passwordprogram, const struct passwd *pass,
if ((pid = sys_fork()) < 0) {
DEBUG(3, ("chat_with_program: Cannot fork() child for password change: %s\n", pass->pw_name));
+ SAFE_FREE(slavedev);
close(master);
CatchChild();
return (False);
@@ -388,6 +395,9 @@ static bool chat_with_program(char *passwordprogram, const struct passwd *pass,
/* we now have a pty */
if (pid > 0) { /* This is the parent process */
+ /* Don't need this anymore in parent. */
+ SAFE_FREE(slavedev);
+
if ((chstat = talktochild(master, chatsequence)) == False) {
DEBUG(3, ("chat_with_program: Child failed to change password: %s\n", pass->pw_name));
kill(pid, SIGKILL); /* be sure to end this process */