1 files changed, 62 insertions, 0 deletions
diff --git a/src/libnsss/nsss_unix_grp_get.c b/src/libnsss/nsss_unix_grp_get.c
new file mode 100644
index 0000000..f7984a4
--- /dev/null
+++ b/src/libnsss/nsss_unix_grp_get.c
@@ -0,0 +1,62 @@
+/* ISC license. */
+
+#include <string.h>
+#include <pthread.h>
+#include <skalibs/types.h>
+#include <skalibs/genalloc.h>
+#include <skalibs/skamisc.h>
+#include <nsss/grp-def.h>
+#include <nsss/nsss-unix.h>
+#include "nsss-unix-internal.h"
+
+static inline char **grp_parsemem (char *s, genalloc *ga)
+{
+  char **grmem ;
+  char **p ;
+  size_t n = 0 ;
+  for (char *t = s ; *t ; t++) if (*t == ',') { n++ ; *t = 0 ; } ;
+  if (*s) n++ ;
+  if (!genalloc_readyplus(char *, ga, n+1)) return 0 ;
+  p = genalloc_s(char *, ga) + genalloc_len(char *, ga) ;
+  grmem = p ;
+  for (size_t i = 0 ; i < n ; i++) { *p++ = s ; s += strlen(s) + 1 ; }
+  *p++ = 0 ;
+  genalloc_setlen(char *, ga, genalloc_len(char *, ga) + n+1) ;
+  return grmem ;
+}
+
+static inline int grp_parseline (struct group *gr, char *s, size_t max, genalloc *ga)
+{
+  struct group gr2 ;
+  char *p ;
+  s[max-1] = 0 ;
+  if (!nsss_unix_field(&gr2.gr_name, &s)) return 0 ;
+  if (!nsss_unix_field(&gr2.gr_passwd, &s)) return 0 ;
+  if (!nsss_unix_field(&p, &s)) return 0 ;
+  if (!gid0_scan(p, &gr2.gr_gid)) return 0 ;
+  gr2.gr_mem = grp_parsemem(s, ga) ;
+  if (!gr2.gr_mem) return 0 ;
+  *gr = gr2 ;
+  return 1 ;
+}
+
+int nsss_unix_grp_get (nsss_unix_t *a, struct group *gr, stralloc *sa, genalloc *ga)
+{
+  int cs ;
+  pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs) ;
+  for (;;)
+  {
+    size_t sabase = sa->len ;
+    size_t gabase = genalloc_len(char *, ga) ;
+    if (skagetln_loose(&a->b, sa, '\n') <= 0) goto err ;
+    if (grp_parseline(gr, sa->s + sabase, sa->len - sabase, ga)) break ;
+    sa->len = sabase ;
+    genalloc_setlen(char *, ga, gabase) ;
+  }
+  pthread_setcancelstate(cs, 0) ;
+  return 1 ;
+
+ err:
+  pthread_setcancelstate(cs, 0) ;
+  return 0 ;
+}