lineedit: fix trivial build failure

[oweals/busybox.git] / libbb / u_signal_names.c

diff --git a/libbb/u_signal_names.c b/libbb/u_signal_names.c
index dc4c0b2371a177b07b7d35cb4937c4524315968f..8c78f5e20c88026b223b9e33b42ff39fe7811169 100644 (file)
--- a/libbb/u_signal_names.c
+++ b/libbb/u_signal_names.c
@@ -4,15 +4,24 @@
  *
  * Copyright 2006 Rob Landley <rob@landley.net>
  *
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
 
+//config:config FEATURE_RTMINMAX
+//config:      bool "Support RTMIN[+n] and RTMAX[-n] signal names"
+//config:      default y
+//config:      help
+//config:        Support RTMIN[+n] and RTMAX[-n] signal names
+//config:        in kill, killall etc. This costs ~250 bytes.
+
 #include "libbb.h"
 
-static const char signals[32][7] = {
+/* Believe it or not, but some arches have more than 32 SIGs!
+ * HPPA: SIGSTKFLT == 36. */
+
+static const char signals[][7] = {
        // SUSv3 says kill must support these, and specifies the numerical values,
        // http://www.opengroup.org/onlinepubs/009695399/utilities/kill.html
-       // TODO: "[SIG]EXIT" shouldn't work for kill, right?
        // {0, "EXIT"}, {1, "HUP"}, {2, "INT"}, {3, "QUIT"},
        // {6, "ABRT"}, {9, "KILL"}, {14, "ALRM"}, {15, "TERM"}
        // And Posix adds the following:
@@ -20,6 +29,7 @@ static const char signals[32][7] = {
        // {SIGSEGV, "SEGV"}, {SIGUSR2, "USR2"}, {SIGPIPE, "PIPE"}, {SIGCHLD, "CHLD"},
        // {SIGCONT, "CONT"}, {SIGSTOP, "STOP"}, {SIGTSTP, "TSTP"}, {SIGTTIN, "TTIN"},
        // {SIGTTOU, "TTOU"}
+
        [0] = "EXIT",
 #ifdef SIGHUP
        [SIGHUP   ] = "HUP",
@@ -114,35 +124,81 @@ static const char signals[32][7] = {
 #ifdef SIGSYS
        [SIGSYS   ] = "SYS",
 #endif
+#if ENABLE_FEATURE_RTMINMAX
+# ifdef __SIGRTMIN
+       [__SIGRTMIN] = "RTMIN",
+# endif
+// This makes array about x2 bigger.
+// More compact approach is to special-case SIGRTMAX in print_signames()
+//# ifdef __SIGRTMAX
+//     [__SIGRTMAX] = "RTMAX",
+//# endif
+#endif
 };
 
 // Convert signal name to number.
 
-int get_signum(const char *name)
+int FAST_FUNC get_signum(const char *name)
 {
-       int i;
+       unsigned i;
 
        i = bb_strtou(name, NULL, 10);
        if (!errno)
                return i;
        if (strncasecmp(name, "SIG", 3) == 0)
                name += 3;
-       for (i = 0; i < sizeof(signals) / sizeof(signals[0]); i++)
+       for (i = 0; i < ARRAY_SIZE(signals); i++)
                if (strcasecmp(name, signals[i]) == 0)
                        return i;
 
-#if ENABLE_DESKTOP && (defined(SIGIOT) || defined(SIGIO))
-       /* These are aliased to other names */
+#if ENABLE_DESKTOP
+# if defined(SIGIOT) || defined(SIGIO)
+       /* SIGIO[T] are aliased to other names,
+        * thus cannot be stored in the signals[] array.
+        * Need special code to recognize them */
        if ((name[0] | 0x20) == 'i' && (name[1] | 0x20) == 'o') {
-#ifdef SIGIO
+#  ifdef SIGIO
                if (!name[2])
                        return SIGIO;
-#endif
-#ifdef SIGIOT
+#  endif
+#  ifdef SIGIOT
                if ((name[2] | 0x20) == 't' && !name[3])
                        return SIGIOT;
+#  endif
+       }
+# endif
 #endif
+
+#if ENABLE_FEATURE_RTMINMAX
+# if defined(SIGRTMIN) && defined(SIGRTMAX)
+/* libc may use some rt sigs for pthreads and therefore "remap" SIGRTMIN/MAX,
+ * but we want to use "raw" SIGRTMIN/MAX. Underscored names, if exist, provide
+ * them. If they don't exist, fall back to non-underscored ones: */
+#  if !defined(__SIGRTMIN)
+#   define __SIGRTMIN SIGRTMIN
+#  endif
+#  if !defined(__SIGRTMAX)
+#   define __SIGRTMAX SIGRTMAX
+#  endif
+       if (strncasecmp(name, "RTMIN", 5) == 0) {
+               if (!name[5])
+                       return __SIGRTMIN;
+               if (name[5] == '+') {
+                       i = bb_strtou(name + 6, NULL, 10);
+                       if (!errno && i <= __SIGRTMAX - __SIGRTMIN)
+                               return __SIGRTMIN + i;
+               }
+       }
+       else if (strncasecmp(name, "RTMAX", 5) == 0) {
+               if (!name[5])
+                       return __SIGRTMAX;
+               if (name[5] == '-') {
+                       i = bb_strtou(name + 6, NULL, 10);
+                       if (!errno && i <= __SIGRTMAX - __SIGRTMIN)
+                               return __SIGRTMAX - i;
+               }
        }
+# endif
 #endif
 
        return -1;
@@ -150,12 +206,31 @@ int get_signum(const char *name)
 
 // Convert signal number to name
 
-const char *get_signame(int number)
+const char* FAST_FUNC get_signame(int number)
 {
-       if ((unsigned)number < sizeof(signals) / sizeof(signals[0])) {
+       if ((unsigned)number < ARRAY_SIZE(signals)) {
                if (signals[number][0]) /* if it's not an empty str */
                        return signals[number];
        }
 
        return itoa(number);
 }
+
+
+// Print the whole signal list
+
+void FAST_FUNC print_signames(void)
+{
+       unsigned signo;
+
+       for (signo = 1; signo < ARRAY_SIZE(signals); signo++) {
+               const char *name = signals[signo];
+               if (name[0])
+                       printf("%2u) %s\n", signo, name);
+       }
+#if ENABLE_FEATURE_RTMINMAX
+# ifdef __SIGRTMAX
+       printf("%2u) %s\n", __SIGRTMAX, "RTMAX");
+# endif
+#endif
+}