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Merge branch 'dt/xgethostname-nul-termination'

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gethostname(2) may not NUL terminate the buffer if hostname does
not fit; unfortunately there is no easy way to see if our buffer
was too small, but at least this will make sure we will not end up
using garbage past the end of the buffer.

* dt/xgethostname-nul-termination:
  xgethostname: handle long hostnames
  use HOST_NAME_MAX to size buffers for gethostname(2)
This commit is contained in:
Junio C Hamano
2017-04-23 22:07:57 -07:00
parent 2d646e3e1f 5781a9a270
commit 5938454cbc
7 changed files with 33 additions and 14 deletions
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4
ident.c
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@ -120,9 +120,9 @@ static int canonical_name(const char *host, struct strbuf *out)
static void add_domainname(struct strbuf *out, int *is_bogus)
{
char buf[1024];
char buf[HOST_NAME_MAX + 1];
if (gethostname(buf, sizeof(buf))) {
if (xgethostname(buf, sizeof(buf))) {
warning_errno("cannot get host name");
strbuf_addstr(out, "(none)");
*is_bogus = 1;