1 /* kill.c - a program to send signals to processes
2 *
3 * Copyright 2012 Daniel Walter <d.walter@0x90.at>
4 *
5 * See http://opengroup.org/onlinepubs/9699919799/utilities/kill.html
6 *
7 * killall5.c - Send signal to all processes outside current session.
8 *
9 * Copyright 2014 Ranjan Kumar <ranjankumar.bth@gmail.com>
10 * Copyright 2014 Kyungwan Han <asura321@gamil.com>
11 *
12 * No Standard
13
14 USE_KILL(NEWTOY(kill, "?ls: ", TOYFLAG_BIN|TOYFLAG_MAYFORK))
15 USE_KILLALL5(NEWTOY(killall5, "?o*ls: [!lo][!ls]", TOYFLAG_SBIN))
16
17 config KILL
18 bool "kill"
19 default y
20 help
21 usage: kill [-l [SIGNAL] | -s SIGNAL | -SIGNAL] PID...
22
23 Send signal to process(es).
24
25 -l List signal name(s) and number(s)
26 -s Send SIGNAL (default SIGTERM)
27
28 config KILLALL5
29 bool "killall5"
30 default y
31 depends on KILL
32 help
33 usage: killall5 [-l [SIGNAL]] [-SIGNAL|-s SIGNAL] [-o PID]...
34
35 Send a signal to all processes outside current session.
36
37 -l List signal name(s) and number(s)
38 -o PID Omit PID
39 -s Send SIGNAL (default SIGTERM)
40 */
41
42 // This has to match the filename:
43 #define FOR_kill
44 #define FORCE_FLAGS
45 #include "toys.h"
46
GLOBALS(char * s;struct arg_list * o;)47 GLOBALS(
48 char *s;
49 struct arg_list *o;
50 )
51
52 // But kill's flags are a subset of killall5's
53
54 #define FOR_killall5
55 #include "generated/flags.h"
56
57 void kill_main(void)
58 {
59 int signum;
60 char *tmp, **args = toys.optargs;
61 pid_t pid;
62
63 // list signal(s)
64 if (FLAG(l)) {
65 if (*args) {
66 int signum = sig_to_num(*args);
67 char *s = 0;
68
69 if (signum>=0) s = num_to_sig(signum&127);
70 if (isdigit(**args)) puts(s ? s : "UNKNOWN");
71 else printf("%d\n", signum);
72 } else list_signals();
73
74 return;
75 }
76
77 // signal must come before pids, so "kill -9 -1" isn't confusing.
78
79 if (!TT.s && *args && **args=='-') TT.s = *(args++)+1;
80 if (TT.s) {
81 char *arg;
82 int i = strtol(TT.s, &arg, 10);
83
84 if (!*arg) arg = num_to_sig(i);
85 else arg = TT.s;
86
87 if (!arg || -1 == (signum = sig_to_num(arg)))
88 error_exit("Unknown signal '%s'", arg);
89 } else signum = SIGTERM;
90
91 // is it killall5?
92 if (CFG_KILLALL5 && toys.which->name[4]=='a') {
93 DIR *dp;
94 struct dirent *entry;
95 int pid, sid;
96 long *olist = 0, ocount = 0;
97
98 // parse omit list
99 if (FLAG(o)) {
100 struct arg_list *ptr;
101
102 for (ptr = TT.o; ptr; ptr = ptr->next) ocount++;
103 olist = xmalloc(ocount*sizeof(long));
104 ocount = 0;
105 for (ptr = TT.o; ptr; ptr=ptr->next) olist[ocount++] = atolx(ptr->arg);
106 }
107
108 sid = getsid(pid = getpid());
109
110 if (!(dp = opendir("/proc"))) {
111 free(olist);
112 perror_exit("/proc");
113 }
114 while ((entry = readdir(dp))) {
115 int count, procpid, procsid;
116
117 if (!(procpid = atoi(entry->d_name))) continue;
118
119 snprintf(toybuf, sizeof(toybuf), "/proc/%d/stat", procpid);
120 if (!readfile(toybuf, toybuf, sizeof(toybuf))) continue;
121 if (sscanf(toybuf, "%*d %*s %*c %*d %*d %d", &procsid) != 1) continue;
122 if (pid == procpid || sid == procsid || procpid == 1) continue;
123
124 // Check for kernel threads.
125 snprintf(toybuf, sizeof(toybuf), "/proc/%d/cmdline", procpid);
126 if (!readfile(toybuf, toybuf, sizeof(toybuf)) || !*toybuf) continue;
127
128 // Check with omit list.
129 for (count = 0; count < ocount; count++)
130 if (procpid == olist[count]) break;
131 if (count != ocount) continue;
132
133 kill(procpid, signum);
134 }
135 closedir(dp);
136 free(olist);
137
138 // is it kill?
139 } else {
140
141 // "<1" in optstr wouldn't cover this because "-SIGNAL"
142 if (!*args) help_exit("missing argument");
143
144 while (*args) {
145 char *arg = *(args++);
146
147 pid = strtol(arg, &tmp, 10);
148 if (*tmp || kill(pid, signum) < 0) error_msg("unknown pid '%s'", arg);
149 }
150 }
151 }
152
killall5_main(void)153 void killall5_main(void)
154 {
155 kill_main();
156 }
157