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
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/* pgrep.c - pgrep and pkill implementation
*
* Copyright 2012 Madhur Verma <mad.flexi@gmail.com>
* Copyright 2013 Kyungwan Han <asura321@gmail.com>
*
USE_PGREP(NEWTOY(pgrep, "?P# s# xvonlf[!sP]", TOYFLAG_USR|TOYFLAG_BIN))
USE_PGREP(OLDTOY(pkill, pgrep, TOYFLAG_USR|TOYFLAG_BIN))
config PGREP
bool "pgrep"
default n
help
usage: pgrep [-flnovx] [-s SID|-P PPID|PATTERN]
pkill [-l|-SIGNAL] [-fnovx] [-s SID|-P PPID|PATTERN]
-l Show command name too / List all signals
-f Match against entire command line
-n Show/Signal the newest process only
-o Show/Signal the oldest process only
-v Negate the match
-x Match whole name (not substring)
-s Match session ID (0 for current)
-P Match parent process ID
*/
#define FOR_pgrep
#include "toys.h"
#include <regex.h>
#define flag_get(f,v,d) ((toys.optflags & f) ? v : d)
#define flag_chk(f) ((toys.optflags & f) ? 1 : 0)
GLOBALS(
long sid; //-s
long ppid; //-P
char *signame;
)
static int exec_action(unsigned pid, char *name, int signal)
{
if (toys.which->name[1] == 'g') {
printf("%d", pid);
if (flag_chk(FLAG_l)) printf(" %s", name);
printf("\n");
} else {
kill(pid, signal);
}
return 0;
}
static int regex_match(regex_t *rp, char *tar, char *patt)
{
regmatch_t rm[1];
int len = strlen(tar);
if (regexec(rp, tar, 1, rm, 0) == 0) {
if (flag_chk(FLAG_x)) {
if ((rm[0].rm_so == 0) && ((rm[0].rm_eo - rm[0].rm_so) == len)) return 1;
} else return 1;
}
return 0;
}
void pgrep_main(void)
{
int signum=0, eval=0, ret=1;
DIR *dp=NULL;
struct dirent *entry=NULL;
regex_t rp;
unsigned pid=0, ppid=0, sid=0, latest_pid=0;
char *cmdline=NULL, *latest_cmdline = NULL;
pid_t self = getpid();
if (!(dp = opendir("/proc"))) perror_exit("OPENDIR: failed to open /proc");
setlinebuf(stdout);
if (toys.which->name[1] == 'k') {
if (flag_chk(FLAG_l)) {
sig_to_num(NULL);
return;
}
if (!TT.signame && *toys.optargs && **toys.optargs == '-') {
TT.signame = *(toys.optargs++) + 1;
}
if (TT.signame) {
char *arg;
int i = strtol(TT.signame, &arg, 10);
if (!*arg) arg = num_to_sig(i);
else arg = TT.signame;
if (!arg || (signum = sig_to_num(arg)) == -1)
error_exit("Unknown signal '%s'", arg);
} else signum = SIGTERM;
}
if (!(flag_chk(FLAG_s) || flag_chk(FLAG_P)) && !*toys.optargs) {
toys.exithelp++;
error_exit("missing argument");
}
if (*(toys.optargs+1) && !(flag_chk(FLAG_s) || flag_chk(FLAG_P))) {
toys.exithelp++;
error_exit("max argument > 1");
}
if (*toys.optargs) { /* compile regular expression(PATTERN) */
if ((eval = regcomp(&rp, *toys.optargs, REG_EXTENDED | REG_NOSUB)) != 0) {
char errbuf[256];
(void) regerror(eval, &rp, errbuf, sizeof(errbuf));
error_exit("%s", errbuf);
}
}
if (flag_chk(FLAG_s)&&(TT.sid==0)) TT.sid = getsid(0);
while ((entry = readdir(dp))) {
int fd = -1, n = 0;
if (!isdigit(*entry->d_name)) continue;
pid = strtol(entry->d_name, NULL, 10);
if (pid == self) continue;
snprintf(toybuf, sizeof(toybuf), "/proc/%s/cmdline", entry->d_name);
if ((fd = open(toybuf, O_RDONLY)) == -1) goto cmdline_fail;
n = read(fd, toybuf, sizeof(toybuf));
close(fd);
toybuf[n--] = '\0';
if (n < 0) {
cmdline_fail:
snprintf(toybuf, sizeof(toybuf), "/proc/%s/comm", entry->d_name);
if ((fd = open(toybuf, O_RDONLY)) == -1) continue;
n = read(fd, toybuf, sizeof(toybuf));
close(fd);
toybuf[--n] = '\0';
if (n < 1) continue;
}
if (flag_chk(FLAG_f)) {
while (--n)
if (toybuf[n] < ' ') toybuf[n] = ' ';
}
if (cmdline) free(cmdline);
cmdline = xstrdup(toybuf);
if (flag_chk(FLAG_s) || flag_chk(FLAG_P)) {
snprintf(toybuf, sizeof(toybuf), "/proc/%s/stat", entry->d_name);
if ((fd = open(toybuf, O_RDONLY)) == -1) continue;
n = read(fd, toybuf, sizeof(toybuf));
close(fd);
if (n<1) continue;
n = sscanf(toybuf, "%*u %*s %*c %u %*u %u", &ppid, &sid);
if (flag_chk(FLAG_s)) if (sid != TT.sid) continue;
if (flag_chk(FLAG_P)) if (ppid != TT.ppid) continue;
}
if (!*toys.optargs || (regex_match(&rp, cmdline, *toys.optargs)^flag_chk(FLAG_v))) {
if (flag_chk(FLAG_n)) {
if (latest_cmdline) free(latest_cmdline);
latest_cmdline = xstrdup(cmdline);
latest_pid = pid;
} else exec_action(pid, cmdline, signum);
ret = 0;
if (flag_chk(FLAG_o)) break;
}
}
if (cmdline) free(cmdline);
if (latest_cmdline) {
exec_action(latest_pid, latest_cmdline, signum);
free(latest_cmdline);
}
if (*toys.optargs) regfree(&rp);
closedir(dp);
toys.exitval = ret;
}
|
