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#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
/* this will be running setgid root, so be careful! */
void usage(void) {
fprintf(stderr, "usage: netreport [-r]\n");
exit(1);
}
#define ADD 1
#define DEL 0
int main(int argc, char ** argv) {
int action = ADD;
/* more than long enough for "/var/run/netreport/<pid>\0" */
char netreport_name[64];
int netreport_file;
if (argc > 2) usage();
if (argc > 1) {
if (!strcmp(argv[1], "-r")) {
action = DEL;
} else {
usage();
}
}
snprintf(netreport_name, sizeof(netreport_name),
"/var/run/netreport/%d", getppid());
if (action == ADD) {
netreport_file = open(netreport_name,
O_EXCL | O_CREAT | O_WRONLY | O_TRUNC,
0);
if (netreport_file < 0) {
if (errno != EEXIST) {
perror("Could not create netreport file");
exit (1);
}
} else {
close(netreport_file);
}
} else {
/* ignore errors; not much we can do, won't hurt anything */
unlink(netreport_name);
}
exit(0);
}
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