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/*
* Copyright (c) 1997,2008 Andrew G. Morgan <morgan@kernel.org>
*
* This displays the capabilities of given target process(es).
*/
#include <sys/types.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/capability.h>
static void usage(int code)
{
fprintf(stderr,
"usage: getcaps <pid> [<pid> ...]\n\n"
" This program displays the capabilities on the queried process(es).\n"
" The capabilities are displayed in the cap_from_text(3) format.\n"
"\n"
" Optional arguments:\n"
" --help, -h or --usage display this message.\n"
" --verbose use a more verbose output format.\n"
" --ugly or --legacy use the archaic legacy output format.\n"
" --license display license info\n");
exit(code);
}
int main(int argc, char **argv)
{
int retval = 0;
int verbose = 0;
if (argc < 2) {
usage(1);
}
for ( ++argv; --argc > 0; ++argv ) {
ssize_t length;
int pid;
cap_t cap_d;
if (!strcmp(argv[0], "--help") || !strcmp(argv[0], "--usage") ||
!strcmp(argv[0], "-h")) {
usage(0);
} else if (!strcmp(argv[0], "--license")) {
printf("%s has a you choose license: BSD 3-clause or GPL2\n"
"[Copyright (c) 1997-8,2007,2019 Andrew G. Morgan <morgan@kernel.org>]\n",
argv[0]);
exit(0);
} else if (!strcmp(argv[0], "--verbose")) {
verbose = 1;
continue;
} else if (!strcmp(argv[0], "--ugly") || !strcmp(argv[0], "--legacy")) {
verbose = 2;
continue;
}
pid = atoi(argv[0]);
cap_d = cap_get_pid(pid);
if (cap_d == NULL) {
fprintf(stderr, "Failed to get cap's for process %d:"
" (%s)\n", pid, strerror(errno));
retval = 1;
continue;
} else {
char *result = cap_to_text(cap_d, &length);
if (verbose == 1) {
printf("Capabilities for '%s': %s\n", *argv, result);
} else if (verbose == 2) {
fprintf(stderr, "Capabilities for `%s': %s\n", *argv, result);
} else {
printf("%s: %s\n", *argv, result);
}
cap_free(result);
result = NULL;
cap_free(cap_d);
}
}
return retval;
}
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