From 220534453eecc2c07ad710d72268aafd20b83138 Mon Sep 17 00:00:00 2001
From: joe <joe@jerkface.net>
Date: Fri, 8 May 2015 23:07:47 -0400
Subject: initial commit

---
 uidgid.c | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 uidgid.c

(limited to 'uidgid.c')

diff --git a/uidgid.c b/uidgid.c
new file mode 100644
index 0000000..befa754
--- /dev/null
+++ b/uidgid.c
@@ -0,0 +1,74 @@
+#include <sys/types.h>
+#include <pwd.h>
+#include <grp.h>
+#include "uidgid.h"
+#include "str.h"
+#include "scan.h"
+
+/* user */
+unsigned int uidgid_get(struct uidgid *u, char *ug) {
+  struct passwd *pwd =0;
+
+  if (! (pwd =getpwnam(ug))) return(0);
+  u->gid[0] =pwd->pw_gid; u->gids =1;
+  u->uid =pwd->pw_uid;
+  return(1);
+}
+
+/* uid:gid[:gid[:gid]...] */
+unsigned int uidgids_set(struct uidgid *u, char *ug) {
+  unsigned long id;
+  int i;
+
+  if (*(ug +=scan_ulong(ug, &id)) != ':') return(0);
+  u->uid =(uid_t)id;
+  ++ug;
+  for (i =0; i < 60; ++i, ++ug) {
+    ug +=scan_ulong(ug, &id);
+    u->gid[i] =(gid_t)id;
+    if (*ug != ':') { ++i; break; }
+  }
+  u->gid[i] =0;
+  u->gids =i;
+  if (*ug) return(0);
+  return(1);
+}
+
+/* [:]user[:group[:group]...] */
+unsigned int uidgids_get(struct uidgid *u, char *ug) {
+  char *g =0;
+  struct passwd *pwd =0;
+  struct group *gr =0;
+  int i, d =0;
+
+  if (*ug == ':') return(uidgids_set(u, ug +1));
+  if (ug[(d =str_chr(ug, ':'))] == ':') {
+    ug[d] =0;
+    g =ug +d +1;
+  }
+  if (! (pwd =getpwnam(ug))) { if (g) ug[d] =':'; return(0); }
+  u->uid =pwd->pw_uid;
+  if (! g) {
+    u->gid[0] =pwd->pw_gid;
+    u->gids =1;
+    return(1);
+  }
+  ug[d] =':';
+  for (i =0; i < 60; ++i) {
+    if (g[(d =str_chr(g, ':'))] == ':') {
+      g[d] =0;
+      if (! (gr =getgrnam(g))) { g[d] =':'; return(0); }
+      g[d] =':';
+      u->gid[i] =gr->gr_gid;
+      g +=d +1;
+    }
+    else {
+      if (! (gr =getgrnam(g))) return(0);
+      u->gid[i++] =gr->gr_gid;
+      break;
+    }
+  }
+  u->gid[i] =0;
+  u->gids =i;
+  return(1);
+}
-- 
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