1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
|
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <signal.h>
static struct {
unsigned int number;
char *name;
} signals[] = {
#define _SIG(name) {SIG##name, #name}
/* Single Unix Specification signals */
_SIG(ABRT),
_SIG(ALRM),
_SIG(FPE),
_SIG(HUP),
_SIG(ILL),
_SIG(INT),
_SIG(KILL),
_SIG(PIPE),
_SIG(QUIT),
_SIG(SEGV),
_SIG(TERM),
_SIG(USR1),
_SIG(USR2),
_SIG(CHLD),
_SIG(CONT),
_SIG(STOP),
_SIG(TSTP),
_SIG(TTIN),
_SIG(TTOU),
_SIG(BUS),
_SIG(POLL),
_SIG(PROF),
_SIG(SYS),
_SIG(TRAP),
_SIG(URG),
_SIG(VTALRM),
_SIG(XCPU),
_SIG(XFSZ),
/* non-SUS signals */
_SIG(IO),
_SIG(PWR),
#ifdef SIGSTKFLT
_SIG(STKFLT),
#endif
_SIG(WINCH),
#undef _SIG
};
/* To indicate a matching signal was not found */
static const unsigned int SENTINEL = (unsigned int) -1;
void list_signals()
{
unsigned int sorted_signals[_NSIG];
unsigned int i;
unsigned int num;
memset(sorted_signals, SENTINEL, sizeof(sorted_signals));
// Sort the signals
for (i = 0; i < sizeof(signals)/sizeof(signals[0]); i++) {
sorted_signals[signals[i].number] = i;
}
num = 0;
for (i = 1; i < _NSIG; i++) {
unsigned int index = sorted_signals[i];
if (index == SENTINEL) {
continue;
}
fprintf(stderr, "%2d) SIG%-9s ", i, signals[index].name);
if ((num++ % 4) == 3) {
fprintf(stderr, "\n");
}
}
if ((num % 4) == 3) {
fprintf(stderr, "\n");
}
}
unsigned int name_to_signal(const char* name)
{
unsigned int i;
for (i = 1; i < sizeof(signals) / sizeof(signals[0]); i++) {
if (!strcasecmp(name, signals[i].name)) {
return signals[i].number;
}
}
return SENTINEL;
}
int kill_main(int argc, char **argv)
{
unsigned int sig = SIGTERM;
int result = 0;
argc--;
argv++;
if (argc >= 1 && argv[0][0] == '-') {
char *endptr;
size_t arg_len = strlen(argv[0]);
if (arg_len < 2) {
fprintf(stderr, "invalid argument: -\n");
return -1;
}
char* arg = argv[0] + 1;
if (arg_len == 2 && *arg == 'l') {
list_signals();
return 0;
}
sig = strtol(arg, &endptr, 10);
if (*endptr != '\0') {
sig = name_to_signal(arg);
if (sig == SENTINEL) {
fprintf(stderr, "invalid signal name: %s\n", arg);
return -1;
}
}
argc--;
argv++;
}
while(argc > 0){
int pid = atoi(argv[0]);
int err = kill(pid, sig);
if (err < 0) {
result = err;
fprintf(stderr, "could not kill pid %d: %s\n", pid, strerror(errno));
}
argc--;
argv++;
}
return result;
}
|
