X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/211b4228d0268fdb1a2664d4b7fc253e92d76166..115393d8e6050cc174ef15cc7cfaca23a81a3b89:/unix/uxpty.c

diff --git a/unix/uxpty.c b/unix/uxpty.c
index 96b64e8d..16ad6e21 100644
--- a/unix/uxpty.c
+++ b/unix/uxpty.c
@@ -80,7 +80,7 @@ struct pty_tag {
     int master_fd, slave_fd;
     void *frontend;
     char name[FILENAME_MAX];
-    int child_pid;
+    pid_t child_pid;
     int term_width, term_height;
     int child_dead, finished;
     int exit_code;
@@ -137,7 +137,7 @@ static int pty_compare_by_pid(void *av, void *bv)
 
 static int pty_find_by_pid(void *av, void *bv)
 {
-    int a = *(int *)av;
+    pid_t a = *(pid_t *)av;
     Pty b = (Pty)bv;
 
     if (a < b->child_pid)
@@ -167,7 +167,8 @@ static tree234 *ptys_by_pid = NULL;
 static Pty single_pty = NULL;
 
 #ifndef OMIT_UTMP
-static int pty_utmp_helper_pid, pty_utmp_helper_pipe;
+static pid_t pty_utmp_helper_pid;
+static int pty_utmp_helper_pipe;
 static int pty_stamped_utmp;
 static struct utmpx utmp_entry;
 #endif
@@ -260,7 +261,8 @@ static void cleanup_utmp(void)
 
 static void sigchld_handler(int signum)
 {
-    write(pty_signal_pipe[1], "x", 1);
+    if (write(pty_signal_pipe[1], "x", 1) <= 0)
+	/* not much we can do about it */;
 }
 
 #ifndef OMIT_UTMP
@@ -360,8 +362,10 @@ static void pty_open_master(Pty pty)
         /*
          * Set the pty master into non-blocking mode.
          */
-        int i = 1;
-        ioctl(pty->master_fd, FIONBIO, &i);
+        int fl;
+	fl = fcntl(pty->master_fd, F_GETFL);
+	if (fl != -1 && !(fl & O_NONBLOCK))
+	    fcntl(pty->master_fd, F_SETFL, fl | O_NONBLOCK);
     }
 
     if (!ptys_by_fd)
@@ -627,16 +631,16 @@ int pty_select_result(int fd, int event)
 
     if (fd == pty_signal_pipe[0]) {
 	pid_t pid;
-	int ipid;
 	int status;
 	char c[1];
 
-	read(pty_signal_pipe[0], c, 1); /* ignore its value; it'll be `x' */
+	if (read(pty_signal_pipe[0], c, 1) <= 0)
+	    /* ignore error */;
+	/* ignore its value; it'll be `x' */
 
 	do {
 	    pid = waitpid(-1, &status, WNOHANG);
 
-	    ipid = pid;
 	    pty = find234(ptys_by_pid, &pid, pty_find_by_pid);
 
 	    if (pty)
@@ -778,7 +782,7 @@ static const char *pty_init(void *frontend, void **backend_handle, Config *cfg,
 	ioctl(0, TIOCSCTTY, 1);
 #endif
 	pgrp = getpid();
-	tcsetpgrp(slavefd, pgrp);
+	tcsetpgrp(0, pgrp);
 	setpgid(pgrp, pgrp);
 	close(open(pty->name, O_WRONLY, 0));
 	setpgid(pgrp, pgrp);
@@ -1085,5 +1089,7 @@ Backend pty_backend = {
     pty_provide_logctx,
     pty_unthrottle,
     pty_cfg_info,
-    1
+    "pty",
+    -1,
+    0
 };