coreutils-8.25HEADcoreutils-8.25master

1 files changed, 86 insertions, 0 deletions

diff --git a/src/operand2sig.c b/src/operand2sig.c
new file mode 100644
index 0000000..62039db
--- /dev/null
+++ b/src/operand2sig.c
@@ -0,0 +1,86 @@
+/* operand2sig.c -- common function for parsing signal specifications
+   Copyright (C) 2008-2016 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* Extracted from kill.c/timeout.c by Pádraig Brady.
+   FIXME: Move this to gnulib/str2sig.c */
+
+
+/* Convert OPERAND to a signal number with printable representation SIGNAME.
+   Return the signal number, or -1 if unsuccessful.  */
+
+#include <config.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#include "system.h"
+#include "error.h"
+#include "quote.h"
+#include "sig2str.h"
+#include "operand2sig.h"
+
+extern int
+operand2sig (char const *operand, char *signame)
+{
+  int signum;
+
+  if (ISDIGIT (*operand))
+    {
+      /* Note we don't put a limit on the maximum value passed,
+         because we're checking shell $? values here, and ksh for
+         example will add 256 to the signal value, thus being wider
+         than the number of WEXITSTATUS bits.
+         We could validate that values were not above say
+         ((WEXITSTATUS (~0) << 1) + 1), which would cater for ksh.
+         But some shells may use other adjustments in future to be
+         (forward) compatible with systems that support
+         wider exit status values as discussed at
+         http://austingroupbugs.net/view.php?id=947  */
+
+      char *endp;
+      long int l = (errno = 0, strtol (operand, &endp, 10));
+      int i = l;
+      signum = (operand == endp || *endp || errno || i != l ? -1
+                : WIFSIGNALED (i) ? WTERMSIG (i) : i);
+    }
+  else
+    {
+      /* Convert signal to upper case in the C locale, not in the
+         current locale.  Don't assume ASCII; it might be EBCDIC.  */
+      char *upcased = xstrdup (operand);
+      char *p;
+      for (p = upcased; *p; p++)
+        if (strchr ("abcdefghijklmnopqrstuvwxyz", *p))
+          *p += 'A' - 'a';
+
+      /* Look for the signal name, possibly prefixed by "SIG",
+         and possibly lowercased.  */
+      if (!(str2sig (upcased, &signum) == 0
+            || (upcased[0] == 'S' && upcased[1] == 'I' && upcased[2] == 'G'
+                && str2sig (upcased + 3, &signum) == 0)))
+        signum = -1;
+
+      free (upcased);
+    }
+
+  if (signum < 0 || sig2str (signum, signame) != 0)
+    {
+      error (0, 0, _("%s: invalid signal"), quote (operand));
+      return -1;
+    }
+
+  return signum;
+}