* Mini getpty implementation for busybox
* Bjorn Wesen, Axis Communications AB (bjornw@axis.com)
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
#include "libbb.h"
#define DEBUG 0
-int xgetpty(char *line)
+int FAST_FUNC xgetpty(char *line)
{
int p;
+
#if ENABLE_FEATURE_DEVPTS
p = open("/dev/ptmx", O_RDWR);
if (p > 0) {
- const char *name;
- grantpt(p);
- unlockpt(p);
- name = ptsname(p);
- if (!name) {
- bb_perror_msg("ptsname error (is /dev/pts mounted?)");
- goto fail;
+ grantpt(p); /* chmod+chown corresponding slave pty */
+ unlockpt(p); /* (what does this do?) */
+# ifndef HAVE_PTSNAME_R
+ {
+ const char *name;
+ name = ptsname(p); /* find out the name of slave pty */
+ if (!name) {
+ bb_perror_msg_and_die("ptsname error (is /dev/pts mounted?)");
+ }
+ safe_strncpy(line, name, GETPTY_BUFSIZE);
+ }
+# else
+ /* find out the name of slave pty */
+ if (ptsname_r(p, line, GETPTY_BUFSIZE-1) != 0) {
+ bb_perror_msg_and_die("ptsname error (is /dev/pts mounted?)");
}
- safe_strncpy(line, name, GETPTY_BUFSIZE);
+ line[GETPTY_BUFSIZE-1] = '\0';
+# endif
return p;
}
#else
}
}
#endif /* FEATURE_DEVPTS */
-USE_FEATURE_DEVPTS( fail:)
- bb_error_msg_and_die("open pty");
- return -1; /* never get here */
+ bb_error_msg_and_die("can't find free pty");
}
-
-