[hackers] [PATCH 3/3][sbase] chgrp: parse gid if operand is not group name

[Richard Ipsum]

Don't treat failure to find group name as an error.
---
 chgrp.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/chgrp.c b/chgrp.c
index 7ee3553..69c43a4 100644
--- a/chgrp.c
+++ b/chgrp.c
@@ -44,6 +44,7 @@ int
 main(int argc, char *argv[])
 {
        struct group *gr;
+       char *group;
        struct recursor r = { .fn = chgrp, .hist = NULL, .depth = 0, .maxdepth 
= 1,
                              .follow = 'P', .flags = 0 };
 
@@ -66,14 +67,14 @@ main(int argc, char *argv[])
        if (argc < 2)
                usage();
 
-       errno = 0;
-       if (!(gr = getgrnam(argv[0]))) {
-               if (errno)
-                       eprintf("getgrnam %s:", argv[0]);
-               else
-                       eprintf("getgrnam %s: no such group\n", argv[0]);
+       group = argv[0];
+       if (group && *group) {
+               gr = getgrnam(group);
+               gid = gr ? gr->gr_gid : estrtonum(group, 0, UINT_MAX);
        }
-       gid = gr->gr_gid;
+
+       if (gid == -1)
+               usage();
 
        for (argc--, argv++; *argv; argc--, argv++)
                recurse(*argv, NULL, &r);
-- 
2.21.0