From ddfb267b0e72499f6022981733264a063ec881f0 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Thu, 4 Apr 2013 19:23:47 -0400
Subject: [PATCH] add put*ent functions for passwd/group files and similar for
 shadow

since shadow does not yet support enumeration (getspent), the
corresponding FILE-based get and put versions are also subbed out for
now. this is partly out of laziness and partly because it's not clear
how they should work in the presence of TCB shadow files. the stubs
should make it possible to compile some software that expects them to
exist, but such software still may not work properly.
---
 include/grp.h          |  1 +
 include/pwd.h          |  1 +
 src/passwd/fgetspent.c | 11 +++++++++++
 src/passwd/putgrent.c  | 14 ++++++++++++++
 src/passwd/putpwent.c  |  9 +++++++++
 5 files changed, 36 insertions(+)
 create mode 100644 src/passwd/fgetspent.c
 create mode 100644 src/passwd/putgrent.c
 create mode 100644 src/passwd/putpwent.c

diff --git a/include/grp.h b/include/grp.h
index 8e2e1f20..b331d326 100644
--- a/include/grp.h
+++ b/include/grp.h
@@ -36,6 +36,7 @@ void           setgrent(void);
 
 #ifdef _GNU_SOURCE
 struct group  *fgetgrent(FILE *stream);
+int putgrent(const struct group *, FILE *);
 #endif
 
 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
diff --git a/include/pwd.h b/include/pwd.h
index 91fe426f..55d9d42d 100644
--- a/include/pwd.h
+++ b/include/pwd.h
@@ -39,6 +39,7 @@ int getpwnam_r (const char *, struct passwd *, char *, size_t, struct passwd **)
 
 #ifdef _GNU_SOURCE
 struct passwd *fgetpwent(FILE *);
+int putpwent(const struct passwd *, FILE *);
 #endif
 
 #ifdef __cplusplus
diff --git a/src/passwd/fgetspent.c b/src/passwd/fgetspent.c
new file mode 100644
index 00000000..a9a3c970
--- /dev/null
+++ b/src/passwd/fgetspent.c
@@ -0,0 +1,11 @@
+#include "pwf.h"
+
+struct spwd *fgetspent(FILE *f)
+{
+	return 0;
+}
+
+int putspent(const struct spwd *sp, FILE *f)
+{
+	return -1;
+}
diff --git a/src/passwd/putgrent.c b/src/passwd/putgrent.c
new file mode 100644
index 00000000..d7847b15
--- /dev/null
+++ b/src/passwd/putgrent.c
@@ -0,0 +1,14 @@
+#include <grp.h>
+#include <stdio.h>
+
+int putgrent(const struct group *gr, FILE *f)
+{
+	int r;
+	size_t i;
+	flockfile(f);
+	r = fprintf(f, "%s:%s:%d:", gr->gr_name, gr->gr_passwd, gr->gr_gid);
+	if (gr->gr_mem) for (i=0; gr->gr_mem[i]; i++)
+		if (fprintf(f, "%s%s", i?",":"", gr->gr_mem[i])<0) r = -1;
+	funlockfile(f);
+	return r<0 ? -1 : 0;
+}
diff --git a/src/passwd/putpwent.c b/src/passwd/putpwent.c
new file mode 100644
index 00000000..80fbf384
--- /dev/null
+++ b/src/passwd/putpwent.c
@@ -0,0 +1,9 @@
+#include <pwd.h>
+#include <stdio.h>
+
+int putpwent(const struct passwd *pw, FILE *f)
+{
+	return fprintf(f, "%s:%s:%d:%d:%s:%s:%s\n",
+		pw->pw_name, pw->pw_passwd, pw->pw_uid, pw->pw_gid,
+		pw->pw_gecos, pw->pw_dir, pw->pw_shell)<0 ? -1 : 0;
+}
-- 
2.25.1