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-rw-r--r--shell_cmds/id/id.c529
1 files changed, 529 insertions, 0 deletions
diff --git a/shell_cmds/id/id.c b/shell_cmds/id/id.c
new file mode 100644
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--- /dev/null
+++ b/shell_cmds/id/id.c
@@ -0,0 +1,529 @@
+/*-
+ * Copyright (c) 1991, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static const char copyright[] =
+"@(#) Copyright (c) 1991, 1993\n\
+ The Regents of the University of California. All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)id.c 8.2 (Berkeley) 2/16/94";
+#endif
+#endif /* not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/usr.bin/id/id.c,v 1.33 2006/12/29 12:28:34 stefanf Exp $");
+
+#include <sys/param.h>
+#ifndef __APPLE__
+#include <sys/mac.h>
+#endif /* !__APPLE__ */
+
+#ifdef USE_BSM_AUDIT
+#include <bsm/audit.h>
+#endif
+
+#include <err.h>
+#include <errno.h>
+#include <grp.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+void id_print(struct passwd *, int, int, int);
+void pline(struct passwd *);
+void pretty(struct passwd *);
+void auditid(void);
+void fullname(struct passwd *);
+void group(struct passwd *, int);
+void maclabel(void);
+void usage(void);
+struct passwd *who(char *);
+
+int isgroups, iswhoami;
+
+#ifdef __APPLE__
+// SPI for 5235093
+int32_t getgrouplist_2(const char *, gid_t, gid_t **);
+#endif
+
+int
+main(int argc, char *argv[])
+{
+ struct group *gr;
+ struct passwd *pw;
+ int Gflag, Mflag, Pflag, ch, gflag, id, nflag, pflag, rflag, uflag;
+ int Aflag;
+ int Fflag;
+ const char *myname;
+
+ Gflag = Mflag = Pflag = gflag = nflag = pflag = rflag = uflag = 0;
+ Aflag = 0;
+ Fflag = 0;
+
+ myname = strrchr(argv[0], '/');
+ myname = (myname != NULL) ? myname + 1 : argv[0];
+ if (strcmp(myname, "groups") == 0) {
+ isgroups = 1;
+ Gflag = nflag = 1;
+ }
+ else if (strcmp(myname, "whoami") == 0) {
+ iswhoami = 1;
+ uflag = nflag = 1;
+ }
+
+ while ((ch = getopt(argc, argv,
+ (isgroups || iswhoami) ? "" : "AFPGMagnpru")) != -1)
+ switch(ch) {
+#ifdef USE_BSM_AUDIT
+ case 'A':
+ Aflag = 1;
+ break;
+#endif
+ case 'F':
+ Fflag = 1;
+ break;
+ case 'G':
+ Gflag = 1;
+ break;
+ case 'M':
+ Mflag = 1;
+ break;
+ case 'P':
+ Pflag = 1;
+ break;
+ case 'a':
+ break;
+ case 'g':
+ gflag = 1;
+ break;
+ case 'n':
+ nflag = 1;
+ break;
+ case 'p':
+ pflag = 1;
+ break;
+ case 'r':
+ rflag = 1;
+ break;
+ case 'u':
+ uflag = 1;
+ break;
+ case '?':
+ default:
+ usage();
+ }
+ argc -= optind;
+ argv += optind;
+
+ if (iswhoami && argc > 0)
+ usage();
+
+ switch(Aflag + Fflag + Gflag + Mflag + Pflag + gflag + pflag + uflag) {
+ case 1:
+ break;
+ case 0:
+ if (!nflag && !rflag)
+ break;
+ /* FALLTHROUGH */
+ default:
+ usage();
+ }
+
+ pw = *argv ? who(*argv) : NULL;
+
+ if (Mflag && pw != NULL)
+ usage();
+
+#ifdef USE_BSM_AUDIT
+ if (Aflag) {
+ auditid();
+ exit(0);
+ }
+#endif
+
+ if (Fflag) {
+ fullname(pw);
+ exit(0);
+ }
+
+ if (gflag) {
+ id = pw ? pw->pw_gid : rflag ? getgid() : getegid();
+ if (nflag && (gr = getgrgid(id)))
+ (void)printf("%s\n", gr->gr_name);
+ else
+ (void)printf("%u\n", id);
+ exit(0);
+ }
+
+ if (uflag) {
+ id = pw ? pw->pw_uid : rflag ? getuid() : geteuid();
+ if (nflag && (pw = getpwuid(id)))
+ (void)printf("%s\n", pw->pw_name);
+ else
+ (void)printf("%u\n", id);
+ exit(0);
+ }
+
+ if (Gflag) {
+ group(pw, nflag);
+ exit(0);
+ }
+
+ if (Mflag) {
+ maclabel();
+ exit(0);
+ }
+
+ if (Pflag) {
+ pline(pw);
+ exit(0);
+ }
+
+ if (pflag) {
+ pretty(pw);
+ exit(0);
+ }
+
+ if (pw) {
+ id_print(pw, 1, 0, 0);
+ }
+ else {
+ id = getuid();
+ pw = getpwuid(id);
+ id_print(pw, 0, 1, 1);
+ }
+ exit(0);
+}
+
+void
+pretty(struct passwd *pw)
+{
+ struct group *gr;
+ u_int eid, rid;
+ char *login;
+
+ if (pw) {
+ (void)printf("uid\t%s\n", pw->pw_name);
+ (void)printf("groups\t");
+ group(pw, 1);
+ } else {
+ if ((login = getlogin()) == NULL)
+ err(1, "getlogin");
+
+ pw = getpwuid(rid = getuid());
+ if (pw == NULL || strcmp(login, pw->pw_name))
+ (void)printf("login\t%s\n", login);
+ if (pw)
+ (void)printf("uid\t%s\n", pw->pw_name);
+ else
+ (void)printf("uid\t%u\n", rid);
+
+ if ((eid = geteuid()) != rid) {
+ if ((pw = getpwuid(eid)))
+ (void)printf("euid\t%s\n", pw->pw_name);
+ else
+ (void)printf("euid\t%u\n", eid);
+ }
+ if ((rid = getgid()) != (eid = getegid())) {
+ if ((gr = getgrgid(rid)))
+ (void)printf("rgid\t%s\n", gr->gr_name);
+ else
+ (void)printf("rgid\t%u\n", rid);
+ }
+ (void)printf("groups\t");
+ group(NULL, 1);
+ }
+}
+
+void
+id_print(struct passwd *pw, int use_ggl, int p_euid, int p_egid)
+{
+ struct group *gr;
+ gid_t gid, egid, lastgid;
+ uid_t uid, euid;
+ int cnt, ngroups;
+#ifdef __APPLE__
+ gid_t *groups = NULL;
+#else
+ gid_t groups[NGROUPS + 1];
+#endif
+ const char *fmt;
+
+#ifdef __APPLE__
+ if (pw == NULL) {
+ pw = getpwuid(getuid());
+ }
+
+ use_ggl = 1;
+#endif
+
+ if (pw != NULL) {
+ uid = pw->pw_uid;
+ gid = pw->pw_gid;
+ }
+ else {
+ uid = getuid();
+ gid = getgid();
+ }
+
+ if (use_ggl && pw != NULL) {
+#ifdef __APPLE__
+ // 5235093
+ ngroups = getgrouplist_2(pw->pw_name, gid, &groups);
+#else
+ ngroups = NGROUPS + 1;
+ getgrouplist(pw->pw_name, gid, groups, &ngroups);
+#endif
+ }
+ else {
+#ifdef __APPLE__
+ groups = malloc((NGROUPS + 1) * sizeof(gid_t));
+#endif
+ ngroups = getgroups(NGROUPS + 1, groups);
+ }
+
+#ifdef __APPLE__
+ if (ngroups < 0)
+ warn("failed to retrieve group list");
+#endif
+
+ if (pw != NULL)
+ printf("uid=%u(%s)", uid, pw->pw_name);
+ else
+ printf("uid=%u", getuid());
+ printf(" gid=%u", gid);
+ if ((gr = getgrgid(gid)))
+ (void)printf("(%s)", gr->gr_name);
+ if (p_euid && (euid = geteuid()) != uid) {
+ (void)printf(" euid=%u", euid);
+ if ((pw = getpwuid(euid)))
+ (void)printf("(%s)", pw->pw_name);
+ }
+ if (p_egid && (egid = getegid()) != gid) {
+ (void)printf(" egid=%u", egid);
+ if ((gr = getgrgid(egid)))
+ (void)printf("(%s)", gr->gr_name);
+ }
+ fmt = " groups=%u";
+ for (lastgid = -1, cnt = 0; cnt < ngroups; ++cnt) {
+ if (lastgid == (gid = groups[cnt]))
+ continue;
+ printf(fmt, gid);
+ fmt = ",%u";
+ if ((gr = getgrgid(gid)))
+ printf("(%s)", gr->gr_name);
+ lastgid = gid;
+ }
+ printf("\n");
+#ifdef __APPLE__
+ free(groups);
+#endif
+}
+
+#ifdef USE_BSM_AUDIT
+void
+auditid(void)
+{
+ auditinfo_addr_t auditinfo;
+
+ if (getaudit_addr(&auditinfo, sizeof(auditinfo)) < 0)
+ err(1, "getaudit");
+ printf("auid=%d\n", auditinfo.ai_auid);
+ printf("mask.success=0x%08x\n", auditinfo.ai_mask.am_success);
+ printf("mask.failure=0x%08x\n", auditinfo.ai_mask.am_failure);
+ printf("termid.port=0x%08x\n", auditinfo.ai_termid.at_port);
+ printf("asid=%d\n", auditinfo.ai_asid);
+}
+#endif
+
+void
+fullname(struct passwd *pw)
+{
+
+ if (!pw) {
+ if ((pw = getpwuid(getuid())) == NULL)
+ err(1, "getpwuid");
+ }
+
+ (void)printf("%s\n", pw->pw_gecos);
+}
+
+void
+group(struct passwd *pw, int nflag)
+{
+ struct group *gr;
+ int cnt, id, lastid, ngroups;
+#ifdef __APPLE__
+ gid_t *groups = NULL;
+#else
+ gid_t groups[NGROUPS + 1];
+#endif
+ const char *fmt;
+
+#ifdef __APPLE__
+ if (pw == NULL) {
+ pw = getpwuid(getuid());
+ }
+#endif
+
+ if (pw) {
+#ifdef __APPLE__
+ // 5235093
+ ngroups = getgrouplist_2(pw->pw_name, pw->pw_gid, &groups);
+#else
+ ngroups = NGROUPS + 1;
+ (void) getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups);
+#endif
+ } else {
+#ifdef __APPLE__
+ groups = malloc((NGROUPS + 1) * sizeof(gid_t));
+#endif
+ groups[0] = getgid();
+ ngroups = getgroups(NGROUPS, groups + 1) + 1;
+ }
+ fmt = nflag ? "%s" : "%u";
+ for (lastid = -1, cnt = 0; cnt < ngroups; ++cnt) {
+ if (lastid == (id = groups[cnt]))
+ continue;
+ if (nflag) {
+ if ((gr = getgrgid(id)))
+ (void)printf(fmt, gr->gr_name);
+ else
+ (void)printf(*fmt == ' ' ? " %u" : "%u",
+ id);
+ fmt = " %s";
+ } else {
+ (void)printf(fmt, id);
+ fmt = " %u";
+ }
+ lastid = id;
+ }
+ (void)printf("\n");
+#ifdef __APPLE__
+ free(groups);
+#endif
+}
+
+void
+maclabel(void)
+{
+#ifdef __APPLE__
+ errx(1, "-M unsupported");
+#else /* !__APPLE__ */
+ char *string;
+ mac_t label;
+ int error;
+
+ error = mac_prepare_process_label(&label);
+ if (error == -1)
+ errx(1, "mac_prepare_type: %s", strerror(errno));
+
+ error = mac_get_proc(label);
+ if (error == -1)
+ errx(1, "mac_get_proc: %s", strerror(errno));
+
+ error = mac_to_text(label, &string);
+ if (error == -1)
+ errx(1, "mac_to_text: %s", strerror(errno));
+
+ (void)printf("%s\n", string);
+ mac_free(label);
+ free(string);
+#endif /* __APPLE__ */
+}
+
+struct passwd *
+who(char *u)
+{
+ struct passwd *pw;
+ long id;
+ char *ep;
+
+ /*
+ * Translate user argument into a pw pointer. First, try to
+ * get it as specified. If that fails, try it as a number.
+ */
+ if ((pw = getpwnam(u)))
+ return(pw);
+ id = strtol(u, &ep, 10);
+ if (*u && !*ep && (pw = getpwuid(id)))
+ return(pw);
+ errx(1, "%s: no such user", u);
+ /* NOTREACHED */
+}
+
+void
+pline(struct passwd *pw)
+{
+
+ if (!pw) {
+ if ((pw = getpwuid(getuid())) == NULL)
+ err(1, "getpwuid");
+ }
+
+ (void)printf("%s:%s:%d:%d:%s:%ld:%ld:%s:%s:%s\n", pw->pw_name,
+ pw->pw_passwd, pw->pw_uid, pw->pw_gid, pw->pw_class,
+ (long)pw->pw_change, (long)pw->pw_expire, pw->pw_gecos,
+ pw->pw_dir, pw->pw_shell);
+}
+
+
+void
+usage(void)
+{
+
+ if (isgroups)
+ (void)fprintf(stderr, "usage: groups [user]\n");
+ else if (iswhoami)
+ (void)fprintf(stderr, "usage: whoami\n");
+ else
+ (void)fprintf(stderr, "%s\n%s%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
+ "usage: id [user]",
+#ifdef USE_BSM_AUDIT
+ " id -A\n",
+#else
+ "",
+#endif
+ " id -F [user]",
+ " id -G [-n] [user]",
+ " id -M",
+ " id -P [user]",
+ " id -g [-nr] [user]",
+ " id -p [user]",
+ " id -u [-nr] [user]");
+ exit(1);
+}
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