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telnet: fix minor style violation

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While here also fix a very unlikely NULL pointer dereference.

Submitted by:	Shawn Webb <shawn.webb@hardenedbsd.org>
This commit is contained in:
Philip Paeps 2019-07-10 22:36:14 +00:00
parent f6ccd325fc
commit 6071f00ffe
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=349896
1 changed files with 4 additions and 1 deletions
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5
contrib/telnet/telnet/commands.c
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@ -45,6 +45,7 @@ __FBSDID("$FreeBSD$");
#include <sys/socket.h>
#include <netinet/in.h>
#include <assert.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
@ -1654,11 +1655,13 @@ env_init(void)
|| (strncmp((char *)ep->value, "unix:", 5) == 0))) {
char hbuf[256+1];
char *cp2 = strchr((char *)ep->value, ':');
size_t buflen;
gethostname(hbuf, sizeof(hbuf));
hbuf[sizeof(hbuf)-1] = '\0';
unsigned int buflen = strlen(hbuf) + strlen(cp2) + 1;
buflen = strlen(hbuf) + strlen(cp2) + 1;
cp = (char *)malloc(sizeof(char)*buflen);
assert(cp != NULL);
snprintf((char *)cp, buflen, "%s%s", hbuf, cp2);
free(ep->value);
ep->value = (unsigned char *)cp;