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
|
/*
* Copyright (c) 2012 Red Hat.
* Copyright (c) 1995-2002 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include "pmapi.h"
#include "impl.h"
#include "pmda.h"
#include <sys/stat.h>
#include "summary.h"
#include "domain.h"
extern void summary_init(pmdaInterface *);
extern void summary_done(void);
pid_t clientPID;
int
main(int argc, char **argv)
{
int errflag = 0;
int sep = __pmPathSeparator();
char **commandArgv;
pmdaInterface dispatch;
int i;
int len, c;
int clientPipe[2];
char helpfile[MAXPATHLEN];
int cmdpipe; /* metric source/cmd pipe */
char *command = NULL;
char *username;
__pmSetProgname(argv[0]);
__pmGetUsername(&username);
__pmSetInternalState(PM_STATE_PMCS); /* we are below the PMAPI */
snprintf(helpfile, sizeof(helpfile), "%s%c" "summary" "%c" "help",
pmGetConfig("PCP_PMDAS_DIR"), sep, sep);
pmdaDaemon (&dispatch, PMDA_INTERFACE_2, pmProgname, SYSSUMMARY,
"summary.log", helpfile);
while ((c = pmdaGetOpt(argc, argv, "H:h:D:d:l:U:",
&dispatch, &errflag)) != EOF) {
switch (c) {
case 'H': /* backwards compatibility, synonym for -h */
dispatch.version.two.ext->e_helptext = optarg;
break;
case 'U':
username = optarg;
break;
case '?':
errflag++;
break;
}
}
for (len=0, i=optind; i < argc; i++) {
len += strlen(argv[i]) + 1;
}
if (len == 0) {
fprintf(stderr, "%s: a command must be given after the options\n",
pmProgname);
errflag++;
}
else {
command = (char *)malloc(len+2);
command[0] = '\0';
for (i=optind; i < argc; i++) {
if (i > optind)
strcat(command, " ");
strcat(command, argv[i]);
}
}
commandArgv = argv + optind;
if (errflag) {
fprintf(stderr, "Usage: %s [options] command [arg ...]\n\n",
pmProgname);
fputs("Options:\n"
" -h helpfile help text file\n"
" -d domain use domain (numeric) for metrics domain of PMDA\n"
" -l logfile write log into logfile rather than using default log name\n"
" -U username user account to run under (default \"pcp\")\n",
stderr);
exit(1);
}
/* force errors from here on into the log */
pmdaOpenLog(& dispatch);
/* switch to alternate user account now */
__pmSetProcessIdentity(username);
/* initialize */
summary_init(&dispatch);
pmdaConnect(&dispatch);
if (dispatch.status) {
fprintf (stderr, "Cannot connect to pmcd: %s\n",
pmErrStr(dispatch.status));
exit (1);
}
/*
* open a pipe to the command
*/
if (pipe1(clientPipe) < 0) {
perror("pipe");
exit(oserror());
}
if ((clientPID = fork()) == 0) {
/* child */
char cmdpath[MAXPATHLEN+5];
close(clientPipe[0]);
if (dup2(clientPipe[1], fileno(stdout)) < 0) {
perror("dup");
exit(oserror());
}
close(clientPipe[1]);
snprintf (cmdpath, sizeof(cmdpath), "exec %s", commandArgv[0]);
execv(commandArgv[0], commandArgv);
perror(cmdpath);
exit(oserror());
}
fprintf(stderr, "clientPID = %" FMT_PID "\n", clientPID);
close(clientPipe[1]);
cmdpipe = clientPipe[0]; /* parent/agent reads from here */
__pmSetVersionIPC(cmdpipe, PDU_VERSION2);
summaryMainLoop(pmProgname, cmdpipe, &dispatch);
summary_done();
exit(0);
}
|
