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-rw-r--r--libc/gen/pw_scan.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/libc/gen/pw_scan.c b/libc/gen/pw_scan.c
index 3d49aa8..e785511 100644
--- a/libc/gen/pw_scan.c
+++ b/libc/gen/pw_scan.c
@@ -124,6 +124,13 @@ __pw_scan(char *bp, struct passwd *pw, int flags)
goto fmt;
if (p[0])
pw->pw_fields |= _PWF_GID;
+ else {
+ if (pw->pw_name[0] != '+' && pw->pw_name[0] != '-') {
+ if (flags & _PWSCAN_WARN)
+ warnx("no gid for user %s", pw->pw_name);
+ return (0);
+ }
+ }
id = strtoul(p, &ep, 10);
if (errno == ERANGE) {
if (flags & _PWSCAN_WARN)