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/*
* Copyright (c) 2010 Aconex. All Rights Reserved.
* Modify values within an MMV data file for PCPQA.
*/
#include <errno.h>
#include <sys/stat.h>
#include <pcp/pmapi.h>
#include <pcp/impl.h>
#include <pcp/mmv_stats.h>
#include <pcp/mmv_dev.h>
void *addr;
void
usage(void)
{
fprintf(stderr,
"Usage: %s: [options] file\n\n"
"Options:\n"
" -f flag set flag in header (none, noprefix, process)\n"
" -p pid overwrite MMV file PID with given PID\n",
pmProgname);
exit(1);
}
void
write_flags(char *flags)
{
mmv_disk_header_t *hdr = (mmv_disk_header_t *)addr;
if (strcmp(flags, "noprefix") == 0)
hdr->flags |= MMV_FLAG_NOPREFIX;
if (strcmp(flags, "process") == 0)
hdr->flags |= MMV_FLAG_PROCESS;
if (strcmp(flags, "none") == 0)
hdr->flags = 0;
hdr->g1 = ++hdr->g2;
}
void
write_pid(int pid)
{
mmv_disk_header_t *hdr = (mmv_disk_header_t *)addr;
hdr->process = pid;
hdr->g1 = ++hdr->g2;
}
int
main(int argc, char **argv)
{
struct stat sbuf;
char *file, *flags = NULL;
int c, err = 0, pid = 0;
__pmSetProgname(argv[0]);
while ((c = getopt(argc, argv, "f:p:")) != EOF) {
switch (c) {
case 'f':
flags = optarg;
break;
case 'p':
pid = atoi(optarg);
break;
default:
err++;
}
}
if (err || argc != optind + 1)
usage();
file = argv[optind];
c = open(file, O_RDWR, 0644);
if (c < 0) {
fprintf(stderr, "Cannot open %s for writing: %s\n",
file, strerror(errno));
exit(1);
}
fstat(c, &sbuf);
addr = __pmMemoryMap(c, sbuf.st_size, 1);
close(c);
if (flags)
write_flags(flags);
if (pid)
write_pid(pid);
__pmMemoryUnmap(addr, sbuf.st_size);
exit(0);
}
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