From bea0037dbdd979603fb0b5be8b43f5478c1f6fec Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Fri, 19 Sep 2014 02:53:32 +0000
Subject: initial commit

---
 src/skaembutils/s6-chown.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 src/skaembutils/s6-chown.c

(limited to 'src/skaembutils/s6-chown.c')

diff --git a/src/skaembutils/s6-chown.c b/src/skaembutils/s6-chown.c
new file mode 100644
index 0000000..ef6a4a0
--- /dev/null
+++ b/src/skaembutils/s6-chown.c
@@ -0,0 +1,60 @@
+/* ISC license. */
+
+#include <sys/types.h>
+#include <unistd.h>
+#include <skalibs/sgetopt.h>
+#include <skalibs/uint.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/djbunix.h>
+
+#define USAGE "s6-chown [ -U ] [ -u uid ] [ -g gid ] file"
+
+int main (int argc, char const *const *argv, char const *const *envp)
+{
+  int uid = -1, gid = -1 ;
+  PROG = "s6-chown" ;
+  {
+    subgetopt_t l = SUBGETOPT_ZERO ;
+    for (;;)
+    {
+      register int opt = subgetopt_r(argc, argv, "Uu:g:", &l) ;
+      if (opt == -1) break ;
+      switch (opt)
+      {
+        case 'u':
+        {
+          unsigned int u ;
+          if (!uint0_scan(l.arg, &u)) strerr_dieusage(100, USAGE) ;
+          uid = u ;
+          break ;
+        }
+        case 'g':
+        {
+          unsigned int g ;
+          if (!uint0_scan(l.arg, &g)) strerr_dieusage(100, USAGE) ;
+          gid = g ;
+          break ;
+        }
+        case 'U':
+        {
+          unsigned int x ;
+          char const *s = env_get2(envp, "UID") ;
+          if (!s) strerr_dienotset(100, "UID") ;
+          if (!uint0_scan(s, &x)) strerr_dieinvalid(100, "UID") ;
+          uid = x ;
+          s = env_get2(envp, "GID") ;
+          if (!s) strerr_dienotset(100, "GID") ;
+          if (!uint0_scan(s, &x)) strerr_dieinvalid(100, "GID") ;
+          gid = x ;
+          break ;
+        }
+        default : strerr_dieusage(100, USAGE) ;
+      }
+    }
+    argc -= l.ind ; argv += l.ind ;
+  }
+  if (!argc) strerr_dieusage(100, USAGE) ;
+  if (chown(*argv, uid, gid) == -1)
+    strerr_diefu2sys(111, "chown ", argv[0]) ;
+  return 0 ;
+}
-- 
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