1 files changed, 46 insertions, 0 deletions
diff --git a/src/skaembutils/s6-nice.c b/src/skaembutils/s6-nice.c
new file mode 100644
index 0000000..ec9f477
--- /dev/null
+++ b/src/skaembutils/s6-nice.c
@@ -0,0 +1,46 @@
+/* ISC license. */
+
+#include <unistd.h>
+#include <errno.h>
+#include <skalibs/sgetopt.h>
+#include <skalibs/uint.h>
+#include <skalibs/fmtscan.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/djbunix.h>
+
+#define USAGE "s6-nice [ -I | -i ] [ -n value ] prog..."
+
+int main (int argc, char const *const *argv, char const *const *envp)
+{
+  int incr = 10 ;
+  int strict = 0 ;
+  PROG = "s6-nice" ;
+  {
+    subgetopt_t l = SUBGETOPT_ZERO ;
+    for (;;)
+    {
+      register int opt = subgetopt_r(argc, argv, "Iin:", &l) ;
+      if (opt == -1) break ;
+      switch (opt)
+      {
+        case 'I' : strict = 0 ; break ;
+        case 'i' : strict = 1 ; break ;
+        case 'n': if (!int_scan(l.arg, &incr)) strerr_dieusage(100, USAGE) ; break ;
+        default : strerr_dieusage(100, USAGE) ;
+      }
+    }
+    argc -= l.ind ; argv += l.ind ;
+  }
+  if (!argc) strerr_dieusage(100, USAGE) ;
+
+  errno = 0 ;
+  if ((nice(incr) < 0) && errno)
+  {
+    char fmt[1+UINT_FMT] ;
+    fmt[int_fmt(fmt, incr)] = 0 ;
+    if (strict) strerr_diefu2sys(111, "nice to ", fmt) ;
+    else strerr_warnwu2sys("nice to ", fmt) ;
+  }
+  pathexec_run(argv[0], argv, envp) ;
+  strerr_dieexec((errno == ENOENT) ? 127 : 126, argv[0]) ;
+}