1 /* $NetBSD: signalnumber.c,v 1.3 2020/08/20 22:56:56 kre Exp $ */
2
3 /*
4 * Software available to all and sundry without limitations
5 * but without warranty of fitness for any purpose whatever.
6 *
7 * Licensed for any use, including redistribution in source
8 * and binary forms, with or without modifications, subject
9 * the following agreement:
10 *
11 * Licensee agrees to indemnify licensor, and distributor, for
12 * the full amount of any any claim made by the licensee against
13 * the licensor or distributor, for any action that results from
14 * any use or redistribution of this software, plus any costs
15 * incurred by licensor or distributor resulting from that claim.
16 *
17 * This licence must be retained with the software.
18 */
19
20 #include "namespace.h"
21
22 #include <signal.h>
23 #include <stdlib.h>
24 #include <string.h>
25 #include <ctype.h>
26
27 /*
28 * signalnumber()
29 *
30 * Converts the signal named "name" to its
31 * signal number.
32 *
33 * "name" can be the signal name with or without
34 * the leading "SIG" prefix, and character comparisons
35 * are done in a case independent manner.
36 * (ie: SIGINT == INT == int == Int == SiGiNt == (etc).)
37 *
38 * Returns:
39 * 0 on error (invalid signal name)
40 * otherwise the signal number that corresponds to "name"
41 */
42
43 int
signalnumber(const char * name)44 signalnumber(const char *name)
45 {
46 int i;
47 #ifndef SMALL
48 long offs;
49 char *ep;
50 #endif
51
52 if (strncasecmp(name, "sig", 3) == 0)
53 name += 3;
54
55 for (i = 1; i < NSIG; ++i)
56 if (sys_signame[i] != NULL &&
57 strcasecmp(name, sys_signame[i]) == 0)
58 return i;
59
60 #ifndef SMALL
61 if (strncasecmp(name, "rtm", 3) == 0) {
62 name += 3;
63 if (strncasecmp(name, "ax", 2) == 0)
64 i = SIGRTMAX;
65 else if (strncasecmp(name, "in", 2) == 0)
66 i = SIGRTMIN;
67 else
68 return 0;
69 name += 2;
70 if (name[0] == '\0')
71 return i;
72 if (i == SIGRTMAX && name[0] != '-')
73 return 0;
74 if (i == SIGRTMIN && name[0] != '+')
75 return 0;
76 if (!isdigit((unsigned char)name[1]))
77 return 0;
78 offs = strtol(name+1, &ep, 10);
79 if (ep == name+1 || *ep != '\0' ||
80 offs < 0 || offs > SIGRTMAX-SIGRTMIN)
81 return 0;
82 if (name[0] == '+')
83 i += (int)offs;
84 else
85 i -= (int)offs;
86 if (i >= SIGRTMIN && i <= SIGRTMAX)
87 return i;
88 }
89 #endif
90 return 0;
91 }
92