diff options
Diffstat (limited to 'inet/rexec.c')
| -rw-r--r-- | inet/rexec.c | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/inet/rexec.c b/inet/rexec.c index f4772475fd..d91949de3c 100644 --- a/inet/rexec.c +++ b/inet/rexec.c @@ -40,6 +40,7 @@ static char sccsid[] = "@(#)rexec.c 8.1 (Berkeley) 6/4/93"; #include <netinet/in.h> +#include <alloca.h> #include <stdio.h> #include <netdb.h> #include <errno.h> @@ -56,16 +57,30 @@ rexec(ahost, rport, name, pass, cmd, fd2p) int *fd2p; { struct sockaddr_in sin, sin2, from; - struct hostent *hp; + struct hostent hostbuf, *hp; + size_t hstbuflen; + char *hsttmpbuf; u_short port; int s, timo = 1, s3; char c; + int herr; + + hstbuflen = 1024; + hsttmpbuf = __alloca (hstbuflen); + while (__gethostbyname_r (*ahost, &hostbuf, hsttmpbuf, hstbuflen, + &hp, &herr) < 0) + if (herr != NETDB_INTERNAL || errno != ERANGE) + { + herror(*ahost); + return -1; + } + else + { + /* Enlarge the buffer. */ + hstbuflen *= 2; + hsttmpbuf = __alloca (hstbuflen); + } - hp = gethostbyname(*ahost); - if (hp == 0) { - herror(*ahost); - return (-1); - } *ahost = hp->h_name; ruserpass(hp->h_name, &name, &pass); retry: |