dac77d3089
Currently we only handle login names - it should be trivial to fix to allow for parsing UIDs as well.
126 lines
2.3 KiB
C
126 lines
2.3 KiB
C
/* See LICENSE file for copyright and license details. */
|
|
#include <sys/types.h>
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <pwd.h>
|
|
#include <grp.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <limits.h>
|
|
#include "util.h"
|
|
|
|
static void user(struct passwd *pw);
|
|
static void curproc(void);
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
eprintf("usage: %s [user]\n", argv0);
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
struct passwd *pw;
|
|
|
|
ARGBEGIN {
|
|
default:
|
|
usage();
|
|
} ARGEND;
|
|
|
|
switch (argc) {
|
|
case 0:
|
|
curproc();
|
|
break;
|
|
case 1:
|
|
errno = 0;
|
|
pw = getpwnam(argv[0]);
|
|
if (errno != 0)
|
|
eprintf("getpwnam %s:", argv[0]);
|
|
else if (!pw)
|
|
eprintf("getpwnam %s: no such user\n", argv[0]);
|
|
user(pw);
|
|
break;
|
|
default:
|
|
usage();
|
|
}
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
static void
|
|
user(struct passwd *pw)
|
|
{
|
|
struct group *gr;
|
|
gid_t gid, groups[NGROUPS_MAX];
|
|
int ngroups;
|
|
int i;
|
|
|
|
printf("uid=%u(%s)", pw->pw_uid, pw->pw_name);
|
|
printf(" gid=%u", pw->pw_gid);
|
|
if (!(gr = getgrgid(pw->pw_gid)))
|
|
eprintf("getgrgid:");
|
|
printf("(%s)", gr->gr_name);
|
|
|
|
ngroups = NGROUPS_MAX;
|
|
getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups);
|
|
for (i = 0; i < ngroups; i++) {
|
|
gid = groups[i];
|
|
printf("%s%u", !i ? " groups=" : ",", gid);
|
|
if (!(gr = getgrgid(gid)))
|
|
eprintf("getgrgid:");
|
|
printf("(%s)", gr->gr_name);
|
|
}
|
|
putchar('\n');
|
|
}
|
|
|
|
static void
|
|
curproc(void)
|
|
{
|
|
struct passwd *pw;
|
|
struct group *gr;
|
|
uid_t uid, euid;
|
|
gid_t gid, egid, groups[NGROUPS_MAX];
|
|
int ngroups;
|
|
int i;
|
|
|
|
/* Print uid/euid info */
|
|
uid = getuid();
|
|
printf("uid=%u", uid);
|
|
if (!(pw = getpwuid(uid)))
|
|
eprintf("getpwuid:");
|
|
printf("(%s)", pw->pw_name);
|
|
if ((euid = geteuid()) != uid) {
|
|
printf(" euid=%u", euid);
|
|
if (!(pw = getpwuid(euid)))
|
|
eprintf("getpwuid:");
|
|
printf("(%s)", pw->pw_name);
|
|
}
|
|
|
|
/* Print gid/egid info */
|
|
gid = getgid();
|
|
printf(" gid=%u", gid);
|
|
if (!(gr = getgrgid(gid)))
|
|
eprintf("getgrgid:");
|
|
printf("(%s)", gr->gr_name);
|
|
if ((egid = getegid()) != gid) {
|
|
printf(" egid=%u", egid);
|
|
if (!(gr = getgrgid(egid)))
|
|
eprintf("getgrgid:");
|
|
printf("(%s)", gr->gr_name);
|
|
}
|
|
|
|
/* Print groups */
|
|
ngroups = getgroups(NGROUPS_MAX, groups);
|
|
if (ngroups < 0)
|
|
eprintf("getgroups:");
|
|
for (i = 0; i < ngroups; i++) {
|
|
gid = groups[i];
|
|
printf("%s%u", !i ? " groups=" : ",", gid);
|
|
if (!(gr = getgrgid(gid)))
|
|
eprintf("getgrgid:");
|
|
printf("(%s)", gr->gr_name);
|
|
}
|
|
putchar('\n');
|
|
}
|