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authorEric Andersen <andersen@codepoet.org>2001-01-11 11:42:17 +0000
committerEric Andersen <andersen@codepoet.org>2001-01-11 11:42:17 +0000
commitae97a89e1a1a9833080dccc81f6cd26784e1b964 (patch)
tree6ff1ddc7e3980591c7fd0bbd5d9b8ac82da12886 /libc/string/strsignal.c
parentabdc3e4d06db2b9d93c509774fc7c4fde918ec8e (diff)
A large update from Manuel Novoa III <mnovoa3@bellsouth.net>.
Diffstat (limited to 'libc/string/strsignal.c')
-rw-r--r--libc/string/strsignal.c73
1 files changed, 50 insertions, 23 deletions
diff --git a/libc/string/strsignal.c b/libc/string/strsignal.c
index 1a0a6ca47..60acc65b0 100644
--- a/libc/string/strsignal.c
+++ b/libc/string/strsignal.c
@@ -14,16 +14,31 @@
* Also fixed a bug in the signal name lookup code. While the table is
* declared with dimension > 60, there are currently on 32 signals listed.
*
- * Also appended a test routine ( -DSTRSIGNAL_TEST ) to allow a quick check
- * on the buffer length when the sys_errorlist is modified.
+ * Also appended a test routine ( -DCHECK_BUF ) to allow a quick check
+ * on the buffer length and the number of known signals when the sys_errorlist
+ * is modified.
+ *
+ * Added the option WANT_SIGLIST for low-memory applications to omit the
+ * signal message strings and only output the signal number.
*/
+#define WANT_SIGLIST 1
+
#include <string.h>
#include <malloc.h>
#include <signal.h>
+#include <limits.h>
+
+#if (INT_MAX >> 31)
+/* We're set up for 32 bit ints */
+#error need to check size allocation for static buffer 'retbuf'
+#endif
+
extern char *__ltostr(char *buf, long uval, int base, int uppercase);
+#if WANT_SIGLIST
+
const char *const sys_siglist[] = {
"Unknown signal",
"Hangup",
@@ -60,26 +75,27 @@ const char *const sys_siglist[] = {
NULL
};
-#include <limits.h>
-
-#if (INT_MAX >> 31)
-/* We're set up for 32 bit ints */
-#error need to check size allocation for static buffer 'retbuf'
#endif
+#define NUM_KNOWN_SIGNALS 32
+
/********************** Function strsignal ************************************/
+static char retbuf[28]; /* 28 is sufficient for 32 bit ints */
+static const char unknown_signal[] = "Unknown Signal:";
+
char *strsignal(int sig)
{
- static char retbuf[28]; /* 28 is sufficient for 32 bit ints */
- static const char unknown_signal[] = "Unknown Signal:";
char *pos;
+#ifdef WANT_SIGLIST
/* if ((sig >= 0) && (sig < _NSIG)) { */
- if ((sig >= 0) && (sig < 32)) { /* WARNING!!! NOT ALL _NSIG DEFINED!!! */
+ /* WARNING!!! NOT ALL _NSIG DEFINED!!! */
+ if ((sig >= 0) && (sig < NUM_KNOWN_SIGNALS)) {
strcpy(retbuf, sys_siglist[sig]);
return retbuf;
}
+#endif
pos = __ltostr(retbuf + sizeof(unknown_signal) + 1, sig, 10, 0)
- sizeof(unknown_signal);
@@ -90,33 +106,44 @@ char *strsignal(int sig)
/********************** THE END ********************************************/
-#if STRSIGNAL_TEST
+#ifdef CHECK_BUF
/* quick way to check for sufficient buffer length */
#include <stdio.h>
#include <stdlib.h>
int main(void)
{
int max = 0;
- int i, j;
+ int j, retcode;
+
const char *p;
+#if WANT_SIGLIST
+ int i;
+#endif
+ retcode = EXIT_SUCCESS;
+#if WANT_SIGLIST
printf("_NSIG = %d from headers\n", _NSIG);
- for ( i=0 ; i < _NSIG ; i++ ) {
- p = sys_siglist[i];
- if (!p) {
- printf("Warning! I only count %d signals!\n", i);
- break;
- }
+ for ( i=0 ; sys_siglist[i] ; i++ ) {
j = strlen(sys_siglist[i])+1;
if (j > max) max = j;
}
- printf("max len = %i\n", j);
+ if (i != NUM_KNOWN_SIGNALS) {
+ printf("Error: strsignal.c - NUM_KNOWN_SIGNALS should be %d\n", i);
+ retcode = EXIT_FAILURE;
+ }
+#endif
p = strsignal(INT_MIN);
- printf("<%s> %d\n", p, strlen(p)+1);
+ j = strlen(p)+1;
+ if (j > max) max = j;
+ printf("strsignal.c - Test of INT_MIN: <%s> %d\n", p, j);
+
+ if (sizeof(retbuf) != max) {
+ printf("Error: strsignal.c - dimension of retbuf should be = %d\n", max);
+ retcode = EXIT_FAILURE;
+ }
+ printf("strsignal.c - dimension of retbuf correct at %d\n", max);
- p = strsignal(i-1);
- printf("last signal %d is %s\n", i-1, p);
- return EXIT_SUCCESS;
+ return retcode;
}
#endif