diff options
Diffstat (limited to 'misc/ttyslot.c')
| -rw-r--r-- | misc/ttyslot.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/misc/ttyslot.c b/misc/ttyslot.c index 3d9fee62fc..794cada0af 100644 --- a/misc/ttyslot.c +++ b/misc/ttyslot.c @@ -36,6 +36,7 @@ static char sccsid[] = "@(#)ttyslot.c 8.1 (Berkeley) 6/4/93"; #endif /* LIBC_SCCS and not lint */ #include <ttyent.h> +#include <alloca.h> #include <stdio.h> #include <string.h> #include <unistd.h> @@ -47,12 +48,19 @@ ttyslot() register int slot; register char *p; int cnt; + size_t buflen = __sysconf (_SC_TTY_NAME_MAX) + 1; char *name; + if (buflen == 0) + /* This should be enough if no fixed value is given. */ + buflen = 32; + + name = __alloca (buflen); + setttyent(); - for (cnt = 0; cnt < 3; ++cnt) - if (name = ttyname(cnt)) { - if (p = rindex(name, '/')) + for (cnt = 0; cnt < 3; ++cnt) + if (__ttyname_r (cnt, name, buflen) >= 0) { + if (p = rindex(name, '/')) ++p; else p = name; |