selinux/libselinux/utils/getpidprevcon.c

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#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <selinux/selinux.h>
int main(int argc, char **argv)
{
pid_t pid;
char *buf;
int rc;
if (argc != 2) {
fprintf(stderr, "usage: %s pid\n", argv[0]);
exit(1);
}
if (sscanf(argv[1], "%d", &pid) != 1) {
fprintf(stderr, "%s: invalid pid %s\n", argv[0], argv[1]);
exit(2);
}
rc = getpidprevcon(pid, &buf);
if (rc < 0) {
fprintf(stderr, "%s: getpidprevcon() failed: %s\n", argv[0], strerror(errno));
exit(3);
}
printf("%s\n", buf);
freecon(buf);
exit(EXIT_SUCCESS);
}