1 files changed, 53 insertions, 0 deletions
diff --git a/src/minutils/s6-swapoff.c b/src/minutils/s6-swapoff.c
new file mode 100644
index 0000000..1067040
--- /dev/null
+++ b/src/minutils/s6-swapoff.c
@@ -0,0 +1,53 @@
+/* ISC license. */
+
+#include <errno.h>
+#include <skalibs/bytestr.h>
+#include <skalibs/buffer.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/stralloc.h>
+#include <skalibs/djbunix.h>
+#include <skalibs/skamisc.h>
+
+extern int swapoff (char const *) ;
+
+#define USAGE "s6-swapoff device <or> s6-swapoff -a"
+
+#define BUFSIZE 4096
+
+static int swapoffall ( )
+{
+  char buf[BUFSIZE+1] ;
+  buffer b ;
+  stralloc sa = STRALLOC_ZERO ;
+  int e = 0 ;
+  int r ;
+  int fd = open_readb("/proc/swaps") ;
+  if (fd < 0) strerr_diefu1sys(111, "open_readb /proc/swaps") ;
+  buffer_init(&b, &buffer_read, fd, buf, BUFSIZE+1) ;
+  if (skagetln(&b, &sa, '\n') < 0) strerr_diefu1sys(111, "skagetln") ;
+  for (;;)
+  {
+    unsigned int n ;
+    sa.len = 0 ;
+    r = skagetln(&b, &sa, '\n') ;
+    if (r < 0) strerr_diefu1sys(111, "skagetln") ;
+    if (!r) break ;
+    n = byte_chr(sa.s, sa.len, ' ') ;
+    if (n >= sa.len) strerr_dief1x(111, "invalid line in /proc/swaps") ;
+    sa.s[n] = 0 ;
+    if (swapoff(sa.s) < 0) { e++ ; strerr_warnwu2sys("swapoff ", sa.s) ; }
+  }
+  fd_close(fd) ;
+  stralloc_free(&sa) ;
+  return e ;
+}
+
+int main (int argc, char const *const *argv)
+{
+  PROG = "s6-swapoff" ;
+  if (argc < 2) strerr_dieusage(100, USAGE) ;
+  if ((argv[1][0] == '-') && (argv[1][1] == 'a') && !argv[1][2])
+    return swapoffall() ;
+  if (swapoff(argv[1]) == -1) strerr_diefu2sys(111, "swapoff ", argv[1]) ;
+  return 0 ;
+}