From 54b6467013bfbdb3ee606961c02fbff1271ca582 Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Fri, 19 Sep 2014 15:01:58 +0000
Subject: initial commit

---
 src/minutils/s6-swapon.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 src/minutils/s6-swapon.c

(limited to 'src/minutils/s6-swapon.c')

diff --git a/src/minutils/s6-swapon.c b/src/minutils/s6-swapon.c
new file mode 100644
index 0000000..6edd743
--- /dev/null
+++ b/src/minutils/s6-swapon.c
@@ -0,0 +1,37 @@
+/* ISC license. */
+
+#include <stdio.h>
+#include <mntent.h>
+#include <skalibs/bytestr.h>
+#include <skalibs/strerr2.h>
+
+extern int swapon (const char *, unsigned int) ;
+
+#define USAGE "s6-swapon device <or> s6-swapon -a"
+
+static int swaponall ()
+{
+  struct mntent *d ;
+  int e = 0 ;
+  FILE *yuck = setmntent("/etc/fstab", "r") ;
+  if (!yuck) strerr_diefu1sys(111, "setmntent /etc/fstab") ;
+  while ((d = getmntent(yuck)))
+    if (!str_diff(d->mnt_type, "swap") && (swapon(d->mnt_fsname, 0) == -1))
+    {
+      e++ ;
+      strerr_warnwu2sys("swapon ", d->mnt_fsname) ;
+    }
+  endmntent(yuck) ;
+  return e ;
+}
+
+int main (int argc, char const *const *argv)
+{
+  PROG = "s6-swapon" ;
+  if (argc < 2) strerr_dieusage(100, USAGE) ;
+  if ((argv[1][0] == '-') && (argv[1][1] == 'a') && !argv[1][2])
+    return swaponall() ;
+  if (swapon(argv[1], 0) == -1)
+    strerr_diefu2sys(111, "swapon ", argv[1]) ;
+  return 0 ;
+}
-- 
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