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Treat an empty hostname as a failure and return NULL.

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This commit is contained in:
Todd C. Miller
2017-10-20 07:37:40 -06:00
parent 740c619d33
commit 2c45774a35
1 changed files with 1 additions and 1 deletions
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2
lib/util/gethostname.c
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@@ -42,7 +42,7 @@ sudo_gethostname_v1(void)
hname = malloc(host_name_max + 1); hname = malloc(host_name_max + 1);
if (hname != NULL) { if (hname != NULL) {
if (gethostname(hname, host_name_max + 1) == 0) { if (gethostname(hname, host_name_max + 1) == 0 && *hname != '\0') {
/* Old gethostname() may not NUL-terminate if there is no room. */ /* Old gethostname() may not NUL-terminate if there is no room. */
hname[host_name_max] = '\0'; hname[host_name_max] = '\0';
} else { } else {