Oops. I forgot to commit this part of vodz' patch.
diff --git a/libbb/u_signal_names.c b/libbb/u_signal_names.c
new file mode 100644
index 0000000..623b103
--- /dev/null
+++ b/libbb/u_signal_names.c
@@ -0,0 +1,166 @@
+#include <signal.h>
+#include <ctype.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+struct signal_name {
+ const char *name;
+ int number;
+};
+
+static const struct signal_name signames[] = {
+ /* POSIX signals */
+ { "EXIT", 0 }, /* 0 */
+ { "HUP", SIGHUP }, /* 1 */
+ { "INT", SIGINT }, /* 2 */
+ { "QUIT", SIGQUIT }, /* 3 */
+ { "ILL", SIGILL }, /* 4 */
+ { "ABRT", SIGABRT }, /* 6 */
+ { "FPE", SIGFPE }, /* 8 */
+ { "KILL", SIGKILL }, /* 9 */
+ { "SEGV", SIGSEGV }, /* 11 */
+ { "PIPE", SIGPIPE }, /* 13 */
+ { "ALRM", SIGALRM }, /* 14 */
+ { "TERM", SIGTERM }, /* 15 */
+ { "USR1", SIGUSR1 }, /* 10 (arm,i386,m68k,ppc), 30 (alpha,sparc*), 16 (mips) */
+ { "USR2", SIGUSR2 }, /* 12 (arm,i386,m68k,ppc), 31 (alpha,sparc*), 17 (mips) */
+ { "CHLD", SIGCHLD }, /* 17 (arm,i386,m68k,ppc), 20 (alpha,sparc*), 18 (mips) */
+ { "CONT", SIGCONT }, /* 18 (arm,i386,m68k,ppc), 19 (alpha,sparc*), 25 (mips) */
+ { "STOP", SIGSTOP }, /* 19 (arm,i386,m68k,ppc), 17 (alpha,sparc*), 23 (mips) */
+ { "TSTP", SIGTSTP }, /* 20 (arm,i386,m68k,ppc), 18 (alpha,sparc*), 24 (mips) */
+ { "TTIN", SIGTTIN }, /* 21 (arm,i386,m68k,ppc,alpha,sparc*), 26 (mips) */
+ { "TTOU", SIGTTOU }, /* 22 (arm,i386,m68k,ppc,alpha,sparc*), 27 (mips) */
+ /* Miscellaneous other signals */
+#ifdef SIGTRAP
+ { "TRAP", SIGTRAP }, /* 5 */
+#endif
+#ifdef SIGIOT
+ { "IOT", SIGIOT }, /* 6, same as SIGABRT */
+#endif
+#ifdef SIGEMT
+ { "EMT", SIGEMT }, /* 7 (mips,alpha,sparc*) */
+#endif
+#ifdef SIGBUS
+ { "BUS", SIGBUS }, /* 7 (arm,i386,m68k,ppc), 10 (mips,alpha,sparc*) */
+#endif
+#ifdef SIGSYS
+ { "SYS", SIGSYS }, /* 12 (mips,alpha,sparc*) */
+#endif
+#ifdef SIGSTKFLT
+ { "STKFLT", SIGSTKFLT }, /* 16 (arm,i386,m68k,ppc) */
+#endif
+#ifdef SIGURG
+ { "URG", SIGURG }, /* 23 (arm,i386,m68k,ppc), 16 (alpha,sparc*), 21 (mips) */
+#endif
+#ifdef SIGIO
+ { "IO", SIGIO }, /* 29 (arm,i386,m68k,ppc), 23 (alpha,sparc*), 22 (mips) */
+#endif
+#ifdef SIGPOLL
+ { "POLL", SIGPOLL }, /* same as SIGIO */
+#endif
+#ifdef SIGCLD
+ { "CLD", SIGCLD }, /* same as SIGCHLD (mips) */
+#endif
+#ifdef SIGXCPU
+ { "XCPU", SIGXCPU }, /* 24 (arm,i386,m68k,ppc,alpha,sparc*), 30 (mips) */
+#endif
+#ifdef SIGXFSZ
+ { "XFSZ", SIGXFSZ }, /* 25 (arm,i386,m68k,ppc,alpha,sparc*), 31 (mips) */
+#endif
+#ifdef SIGVTALRM
+ { "VTALRM", SIGVTALRM }, /* 26 (arm,i386,m68k,ppc,alpha,sparc*), 28 (mips) */
+#endif
+#ifdef SIGPROF
+ { "PROF", SIGPROF }, /* 27 (arm,i386,m68k,ppc,alpha,sparc*), 29 (mips) */
+#endif
+#ifdef SIGPWR
+ { "PWR", SIGPWR }, /* 30 (arm,i386,m68k,ppc), 29 (alpha,sparc*), 19 (mips) */
+#endif
+#ifdef SIGINFO
+ { "INFO", SIGINFO }, /* 29 (alpha) */
+#endif
+#ifdef SIGLOST
+ { "LOST", SIGLOST }, /* 29 (arm,i386,m68k,ppc,sparc*) */
+#endif
+#ifdef SIGWINCH
+ { "WINCH", SIGWINCH }, /* 28 (arm,i386,m68k,ppc,alpha,sparc*), 20 (mips) */
+#endif
+#ifdef SIGUNUSED
+ { "UNUSED", SIGUNUSED }, /* 31 (arm,i386,m68k,ppc) */
+#endif
+ {0, 0}
+};
+
+/*
+ if str_sig == NULL returned signal name [*signo],
+ if str_sig != NULL - set *signo from signal_name,
+ findings with digit number or with or without SIG-prefix name
+
+ if startnum=0 flag for support finding zero signal,
+ but str_sig="0" always found, (hmm - standart or realize?)
+ if startnum<0 returned reverse signal_number <-> signal_name
+ if found error - returned NULL
+
+*/
+
+const char *
+u_signal_names(const char *str_sig, int *signo, int startnum)
+{
+ static char retstr[16];
+ const struct signal_name *s = signames;
+ static const char prefix[] = "SIG";
+ const char *sptr;
+
+ if(startnum)
+ s++;
+ if(str_sig==NULL) {
+ while (s->name != 0) {
+ if(s->number == *signo)
+ break;
+ s++;
+ }
+ } else {
+ if (isdigit(((unsigned char)*str_sig))) {
+ char *endp;
+ long int sn = strtol(str_sig, &endp, 10);
+ /* test correct and overflow */
+ if(*endp == 0 && sn >= 0 && sn < NSIG) {
+ *signo = (int)sn;
+ /* test for unnamed */
+ sptr = u_signal_names(0, signo, 0);
+ if(sptr==NULL)
+ return NULL;
+ if(sn!=0)
+ sptr += 3;
+ return sptr;
+ }
+ } else {
+ sptr = str_sig;
+ while (s->name != 0) {
+ if (strcasecmp(s->name, sptr) == 0) {
+ *signo = s->number;
+ if(startnum<0) {
+ sprintf(retstr, "%d", *signo);
+ return retstr;
+ }
+ break;
+ }
+ if(s!=signames && sptr == str_sig &&
+ strncasecmp(sptr, prefix, 3) == 0) {
+ sptr += 3; /* strlen(prefix) */
+ continue;
+ }
+ sptr = str_sig;
+ s++;
+ }
+ }
+ }
+ if(s->name==0)
+ return NULL;
+ if(s!=signames)
+ strcpy(retstr, prefix);
+ else
+ retstr[0] = 0;
+ return strcat(retstr, s->name);
+}