[hackers] [ubase] Add initial implementation of passwd(1) || sin

[git]

commit 1ec996439ab06930041afb534a230cd8dd3d95ee
Author: sin <s...@2f30.org>
Date:   Thu Jun 5 12:48:45 2014 +0100

    Add initial implementation of passwd(1)
    
    No shadow support yet.

diff --git a/Makefile b/Makefile
index a68d3ce..c8ba952 100644
--- a/Makefile
+++ b/Makefile
@@ -3,15 +3,17 @@ include config.mk
 .POSIX:
 .SUFFIXES: .c .o
 
-HDR = arg.h config.def.h proc.h reboot.h rtc.h util.h
+HDR = arg.h config.def.h passwd.h proc.h reboot.h rtc.h text.h util.h
 LIB = \
        util/agetcwd.o        \
+       util/agetline.o       \
        util/apathmax.o       \
        util/ealloc.o         \
        util/eprintf.o        \
        util/estrtol.o        \
        util/estrtoul.o       \
        util/explicit_bzero.o \
+       util/passwd.o         \
        util/proc.o           \
        util/putword.o        \
        util/recurse.o        \
@@ -43,6 +45,7 @@ SRC = \
        mount.c             \
        mountpoint.c        \
        pagesize.c          \
+       passwd.c            \
        pidof.c             \
        pivot_root.c        \
        ps.c                \
diff --git a/README b/README
index fae6dce..8dbd1a7 100644
--- a/README
+++ b/README
@@ -8,9 +8,9 @@ The following programs are currently implemented:
 
     chvt clear ctrlaltdel dd df  dmesg eject fallocate free getty halt
     hwclock id  insmod killall5 login  lsmod lsusb mknod  mkswap mount
-    mountpoint  pagesize pidof  pivot_root  ps respawn  rmmod stat  su
-    swapoff swapon  switch_root sysctl truncate umount  unshare uptime
-    watch who
+    mountpoint pagesize passwd pidof  pivot_root ps respawn rmmod stat
+    su  swapoff  swapon  switch_root sysctl  truncate  umount  unshare
+    uptime watch who
 
 The complement  of ubase  is sbase[1] which  mostly follows  POSIX and
 provides all the portable tools.  Together they are intended to form a
diff --git a/TODO b/TODO
index 1b47500..da61687 100644
--- a/TODO
+++ b/TODO
@@ -9,7 +9,6 @@ Tools to be implemented
  * losetup(8)
  * lspci
  * mkswap [-L]
- * passwd
  * adduser
  * addgroup
  * rmuser
diff --git a/passwd.c b/passwd.c
new file mode 100644
index 0000000..52e583b
--- /dev/null
+++ b/passwd.c
@@ -0,0 +1,142 @@
+/* See LICENSE file for copyright and license details. */
+#include <errno.h>
+#include <fcntl.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include "passwd.h"
+#include "util.h"
+
+static void
+usage(void)
+{
+       eprintf("usage: %s login
", argv0);
+}
+
+int
+main(int argc, char *argv[])
+{
+       char *pass, *cryptpass1, *cryptpass2, *cryptpass3;
+       char *p;
+       char template[] = "/tmp/pw.XXXXXX";
+       struct passwd *pw;
+       int ffd, tfd;
+       int r;
+
+       ARGBEGIN {
+       default:
+               usage();
+       } ARGEND;
+
+       if (argc != 1)
+               usage();
+
+       errno = 0;
+       pw = getpwnam(argv[0]);
+       if (errno)
+               eprintf("getpwnam: %s:", argv[0]);
+       else if (!pw)
+               eprintf("who are you?
");
+
+       switch (pw->pw_passwd[0]) {
+       case '!':
+       case '*':
+               eprintf("denied
");
+       }
+
+       if (pw->pw_passwd[0] == '