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fstest.c
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fstest.c
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/*-
* Copyright (c) 2006-2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS 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 AUTHORS 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.
*
* $FreeBSD: src/tools/regression/fstest/fstest.c,v 1.1 2007/01/17 01:42:07 pjd Exp $
*/
#ifdef linux
#define _GNU_SOURCE
#endif
#include <sys/param.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <grp.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <assert.h>
#include <sys/types.h>
#include <utime.h>
#ifdef HAS_ACL
#include <sys/acl.h>
#endif
#include <sys/types.h>
#include <attr/xattr.h>
#ifndef HAS_TRUNCATE64
#define truncate64 truncate
#endif
#ifndef HAS_STAT64
#define stat64 stat
#define lstat64 lstat
#endif
#ifndef ALLPERMS
#define ALLPERMS (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO)
#endif
enum action {
ACTION_OPEN,
ACTION_CREATE,
ACTION_UNLINK,
ACTION_MKDIR,
ACTION_RMDIR,
ACTION_LINK,
ACTION_SYMLINK,
ACTION_RENAME,
ACTION_MKFIFO,
ACTION_CHMOD,
#ifdef HAS_LCHMOD
ACTION_LCHMOD,
#endif
ACTION_CHOWN,
ACTION_LCHOWN,
#ifdef HAS_CHFLAGS
ACTION_CHFLAGS,
#endif
#ifdef HAS_LCHFLAGS
ACTION_LCHFLAGS,
#endif
ACTION_TRUNCATE,
ACTION_STAT,
ACTION_LSTAT,
ACTION_UTIME,
#ifdef HAS_ACL
ACTION_GETFACL,
ACTION_SETFACL,
#endif
ACTION_GETXATTR,
ACTION_SETXATTR,
};
#define TYPE_NONE 0x0000
#define TYPE_STRING 0x0001
#define TYPE_NUMBER 0x0002
#define TYPE_OPTIONAL 0x0100
#define OPTIONAL_NUMBER_SENTINEL -1
#define MAX_ARGS 8
struct syscall_desc {
char *sd_name;
enum action sd_action;
int sd_args[MAX_ARGS];
};
static struct syscall_desc syscalls[] = {
{ "open", ACTION_OPEN, { TYPE_STRING, TYPE_STRING, TYPE_NUMBER | TYPE_OPTIONAL, TYPE_NONE } },
{ "create", ACTION_CREATE, { TYPE_STRING, TYPE_NUMBER, TYPE_NONE } },
{ "unlink", ACTION_UNLINK, { TYPE_STRING, TYPE_NONE } },
{ "mkdir", ACTION_MKDIR, { TYPE_STRING, TYPE_NUMBER, TYPE_NONE } },
{ "rmdir", ACTION_RMDIR, { TYPE_STRING, TYPE_NONE } },
{ "link", ACTION_LINK, { TYPE_STRING, TYPE_STRING, TYPE_NONE } },
{ "symlink", ACTION_SYMLINK, { TYPE_STRING, TYPE_STRING, TYPE_NONE } },
{ "rename", ACTION_RENAME, { TYPE_STRING, TYPE_STRING, TYPE_NONE } },
{ "mkfifo", ACTION_MKFIFO, { TYPE_STRING, TYPE_NUMBER, TYPE_NONE } },
{ "chmod", ACTION_CHMOD, { TYPE_STRING, TYPE_NUMBER, TYPE_NONE } },
#ifdef HAS_LCHMOD
{ "lchmod", ACTION_LCHMOD, { TYPE_STRING, TYPE_NUMBER, TYPE_NONE } },
#endif
{ "chown", ACTION_CHOWN, { TYPE_STRING, TYPE_NUMBER, TYPE_NUMBER, TYPE_NONE } },
{ "lchown", ACTION_LCHOWN, { TYPE_STRING, TYPE_NUMBER, TYPE_NUMBER, TYPE_NONE } },
#ifdef HAS_CHFLAGS
{ "chflags", ACTION_CHFLAGS, { TYPE_STRING, TYPE_STRING, TYPE_NONE } },
#endif
#ifdef HAS_LCHFLAGS
{ "lchflags", ACTION_LCHFLAGS, { TYPE_STRING, TYPE_STRING, TYPE_NONE } },
#endif
{ "truncate", ACTION_TRUNCATE, { TYPE_STRING, TYPE_NUMBER, TYPE_NONE } },
{ "stat", ACTION_STAT, { TYPE_STRING, TYPE_STRING, TYPE_NONE } },
{ "lstat", ACTION_LSTAT, { TYPE_STRING, TYPE_STRING, TYPE_NONE } },
{ "utime", ACTION_UTIME, { TYPE_STRING, TYPE_NUMBER | TYPE_OPTIONAL,
TYPE_NUMBER | TYPE_OPTIONAL, TYPE_NONE } },
#ifdef HAS_ACL
{ "getfacl", ACTION_GETFACL, { TYPE_STRING, TYPE_STRING, TYPE_NONE } },
{ "setfacl", ACTION_SETFACL, { TYPE_STRING, TYPE_STRING,
TYPE_STRING | TYPE_OPTIONAL, TYPE_NONE } },
#endif
{ "getxattr", ACTION_GETXATTR, { TYPE_STRING, TYPE_STRING, TYPE_NONE } },
{ "setxattr", ACTION_SETXATTR, { TYPE_STRING, TYPE_STRING, TYPE_STRING | TYPE_OPTIONAL, TYPE_STRING | TYPE_OPTIONAL, TYPE_NONE } },
{ NULL, -1, { TYPE_NONE } }
};
struct flag {
long long f_flag;
char *f_str;
};
static struct flag open_flags[] = {
#ifdef O_RDONLY
{ O_RDONLY, "O_RDONLY" },
#endif
#ifdef O_WRONLY
{ O_WRONLY, "O_WRONLY" },
#endif
#ifdef O_RDWR
{ O_RDWR, "O_RDWR" },
#endif
#ifdef O_NONBLOCK
{ O_NONBLOCK, "O_NONBLOCK" },
#endif
#ifdef O_APPEND
{ O_APPEND, "O_APPEND" },
#endif
#ifdef O_CREAT
{ O_CREAT, "O_CREAT" },
#endif
#ifdef O_TRUNC
{ O_TRUNC, "O_TRUNC" },
#endif
#ifdef O_EXCL
{ O_EXCL, "O_EXCL" },
#endif
#ifdef O_SHLOCK
{ O_SHLOCK, "O_SHLOCK" },
#endif
#ifdef O_EXLOCK
{ O_EXLOCK, "O_EXLOCK" },
#endif
#ifdef O_DIRECT
{ O_DIRECT, "O_DIRECT" },
#endif
#ifdef O_FSYNC
{ O_FSYNC, "O_FSYNC" },
#endif
#ifdef O_SYNC
{ O_SYNC, "O_SYNC" },
#endif
#ifdef O_NOFOLLOW
{ O_NOFOLLOW, "O_NOFOLLOW" },
#endif
#ifdef O_NOCTTY
{ O_NOCTTY, "O_NOCTTY" },
#endif
{ 0, NULL }
};
#ifdef HAS_CHFLAGS
static struct flag chflags_flags[] = {
#ifdef UF_NODUMP
{ UF_NODUMP, "UF_NODUMP" },
#endif
#ifdef UF_IMMUTABLE
{ UF_IMMUTABLE, "UF_IMMUTABLE" },
#endif
#ifdef UF_APPEND
{ UF_APPEND, "UF_APPEND" },
#endif
#ifdef UF_NOUNLINK
{ UF_NOUNLINK, "UF_NOUNLINK" },
#endif
#ifdef UF_OPAQUE
{ UF_OPAQUE, "UF_OPAQUE" },
#endif
#ifdef SF_ARCHIVED
{ SF_ARCHIVED, "SF_ARCHIVED" },
#endif
#ifdef SF_IMMUTABLE
{ SF_IMMUTABLE, "SF_IMMUTABLE" },
#endif
#ifdef SF_APPEND
{ SF_APPEND, "SF_APPEND" },
#endif
#ifdef SF_NOUNLINK
{ SF_NOUNLINK, "SF_NOUNLINK" },
#endif
#ifdef SF_SNAPSHOT
{ SF_SNAPSHOT, "SF_SNAPSHOT" },
#endif
{ 0, NULL }
};
#endif
static const char *err2str(int error);
static void
usage(void)
{
fprintf(stderr, "usage: fstest [-u uid] [-g gid1[,gid2[...]]] syscall args ...\n");
exit(1);
}
static long long
str2flags(struct flag *tflags, char *sflags)
{
long long flags = 0;
unsigned int i;
char *f;
for (f = strtok(sflags, ","); f != NULL; f = strtok(NULL, ",")) {
/* Support magic 'none' flag which just reset all flags. */
if (strcmp(f, "none") == 0)
return (0);
for (i = 0; tflags[i].f_str != NULL; i++) {
if (strcmp(tflags[i].f_str, f) == 0)
break;
}
if (tflags[i].f_str == NULL) {
fprintf(stderr, "unknown flag '%s'\n", f);
exit(1);
}
flags |= tflags[i].f_flag;
}
return (flags);
}
#ifdef HAS_CHFLAGS
static char *
flags2str(struct flag *tflags, long long flags)
{
static char sflags[1024];
unsigned int i;
sflags[0] = '\0';
for (i = 0; tflags[i].f_str != NULL; i++) {
if (flags & tflags[i].f_flag) {
if (sflags[0] != '\0')
strlcat(sflags, ",", sizeof(sflags));
strlcat(sflags, tflags[i].f_str, sizeof(sflags));
}
}
if (sflags[0] == '\0')
strlcpy(sflags, "none", sizeof(sflags));
return (sflags);
}
#endif
static struct syscall_desc *
find_syscall(const char *name)
{
int i;
for (i = 0; syscalls[i].sd_name != NULL; i++) {
if (strcmp(syscalls[i].sd_name, name) == 0)
return (&syscalls[i]);
}
return (NULL);
}
static void
show_stat(struct stat64 *sp, const char *what)
{
if (strcmp(what, "mode") == 0)
printf("0%o", (unsigned int)(sp->st_mode & ALLPERMS));
else if (strcmp(what, "inode") == 0)
printf("%lld", (long long)sp->st_ino);
else if (strcmp(what, "nlink") == 0)
printf("%lld", (long long)sp->st_nlink);
else if (strcmp(what, "uid") == 0)
printf("%d", (int)sp->st_uid);
else if (strcmp(what, "gid") == 0)
printf("%d", (int)sp->st_gid);
else if (strcmp(what, "size") == 0)
printf("%lld", (long long)sp->st_size);
else if (strcmp(what, "blocks") == 0)
printf("%lld", (long long)sp->st_blocks);
else if (strcmp(what, "atime") == 0)
printf("%lld", (long long)sp->st_atime);
else if (strcmp(what, "mtime") == 0)
printf("%lld", (long long)sp->st_mtime);
else if (strcmp(what, "ctime") == 0)
printf("%lld", (long long)sp->st_ctime);
#ifdef HAS_CHFLAGS
else if (strcmp(what, "flags") == 0)
printf("%s", flags2str(chflags_flags, sp->st_flags));
#endif
else if (strcmp(what, "type") == 0) {
switch (sp->st_mode & S_IFMT) {
case S_IFIFO:
printf("fifo");
break;
case S_IFCHR:
printf("char");
break;
case S_IFDIR:
printf("dir");
break;
case S_IFBLK:
printf("block");
break;
case S_IFREG:
printf("regular");
break;
case S_IFLNK:
printf("symlink");
break;
case S_IFSOCK:
printf("socket");
break;
default:
printf("unknown");
break;
}
} else {
printf("unknown");
}
}
static void
show_stats(struct stat64 *sp, char *what)
{
const char *s = "";
char *w;
for (w = strtok(what, ","); w != NULL; w = strtok(NULL, ",")) {
printf("%s", s);
show_stat(sp, w);
s = ",";
}
printf("\n");
}
#ifdef HAS_ACL
/*
* Get the current setting of an ACL
*
* Argument may be :
* - access : to get the list of permissions in access control list
* - default : to get the list of permissions in default control list
*/
int do_getfacl(const char *path, const char *filter)
{
char *textacl;
acl_t acl;
ssize_t size;
const char *p;
const char *loc;
char c;
int def;
int k;
errno = 0;
def = !strcmp(filter,"default");
if (def || !strcmp(filter,"access")) {
acl = acl_get_file(path,(def ? ACL_TYPE_DEFAULT : ACL_TYPE_ACCESS));
if (acl) {
/*
* When there is no extended ACL, we get
* ENODATA (not mentioned in the man.)
* In such situation return basic ACL
* (or void for default ACL) with no error
*/
if (errno == ENODATA)
errno = 0;
textacl = acl_to_text(acl,&size);
/* getting all the access or default rights */
k = 0;
p = textacl;
while (p && *p) {
loc = p;
if (loc && strchr("ugom",*loc)) {
c = *loc;
loc = strchr(loc,':');
if (loc) {
if (k) {
putchar(',');
k++;
}
putchar(c);
k++;
while (*loc
&& (*loc != '\n')
&& (*loc != '\t')) {
c = *loc++;
putchar(c);
k++;
}
}
}
while (*p && (*p != '\n')) p++;
if (*p) p++;
}
if (textacl)
acl_free(textacl);
if (k)
putchar('\n');
else
printf("void\n");
acl_free(acl);
}
} else
errno = EBADRQC; /* "bad request" */
return (-errno);
}
/*
* Set a new ACL
*
* The first argument can be a list of options among k (remove
* default entries), b (remove extended entries) or m (modify entry).
* If m is present, it can be associated with d to mean default
* acl, and next argument gives the new permissions
*/
int do_setfacl(const char *path, const char *options, const char *textacl)
{
int r;
int type;
acl_t acl;
int dob;
int dok;
int dom;
struct stat st;
char textmode[30];
r = 0;
dob = strchr(options,'b') != (char*)NULL;
dok = strchr(options,'k') != (char*)NULL;
dom = strchr(options,'m') != (char*)NULL;
if ((dom && !textacl)
|| (!dom && (textacl || (!dok && !dob) || strchr(options,'d')))) {
errno = EBADRQC; /* "bad request" */
r = -1;
} else {
if (dob || dok) {
r = acl_delete_def_file(path);
}
if (dob && !r) {
if (!stat(path,&st)) {
sprintf(textmode,"u::%c%c%c,g::%c%c%c,o::%c%c%c",
(st.st_mode & 0400 ? 'r' : '-'),
(st.st_mode & 0200 ? 'w' : '-'),
(st.st_mode & 0100 ? 'x' : '-'),
(st.st_mode & 0040 ? 'r' : '-'),
(st.st_mode & 0020 ? 'w' : '-'),
(st.st_mode & 0010 ? 'x' : '-'),
(st.st_mode & 004 ? 'r' : '-'),
(st.st_mode & 002 ? 'w' : '-'),
(st.st_mode & 001 ? 'x' : '-'));
acl = acl_from_text(textmode);
if (acl) {
r = acl_set_file(path,ACL_TYPE_ACCESS,acl);
acl_free(acl);
} else
r = -1;
} else
r = -1;
}
if (!r && dom) {
if (strchr(options,'d'))
type = ACL_TYPE_DEFAULT;
else
type = ACL_TYPE_ACCESS;
acl = acl_from_text(textacl);
if (acl) {
r = acl_set_file(path,type,acl);
acl_free(acl);
} else
r = -1;
}
}
if (r)
r = -errno;
return (r);
}
#endif
/*
* Get the current setting of an xattr
*
* Argument may be :
* - access : to get the list of permissions in access control list
* - default : to get the list of permissions in default control list
*/
int do_getxattr(const char *path, const char *name)
{
int size = 1024;
int count = 0;
int vsize;
unsigned char *value = malloc(size);
if ((vsize = getxattr(path, name, value, size)) == -1) {
if (errno == ERANGE && count < 10) { // less than 1MB
size *= 2;
count++;
free(value);
value = malloc(size);
}
else {
return -errno;
}
}
int i;
for (i = 0; i < vsize; i++)
putchar(value[i]);
return 0;
}
/*
* Set a new xattr
*
* The options is a string of one character either:
* c (for create; return EEXIST if attribute exists already)
* r (for replace; return ENOATTR if attribute doesn't already exist).
*/
int do_setxattr(const char *path, const char *name, void *value,
const char *options)
{
int size = strlen(value);
int flags = 0;
if (options) {
flags = (strcmp(options, "c") == 0) ? XATTR_CREATE : flags;
flags = (strcmp(options, "r") == 0) ? XATTR_REPLACE : flags;
}
if (setxattr(path, name, value, size, flags) == -1) {
return -errno;
}
return 0;
}
static unsigned int
call_syscall(struct syscall_desc *scall, int argc, char *argv[])
{
struct stat64 sb;
struct utimbuf ut;
long long flags;
unsigned int i;
char *endp;
int rval;
union {
char *str;
long long num;
} args[MAX_ARGS];
/*
* Verify correctness of the arguments.
*/
for (i = 0; i < sizeof(args)/sizeof(args[0]); i++) {
if (scall->sd_args[i] == TYPE_NONE) {
if (i >= argc || argv[i] == NULL || strcmp(argv[i], ":") == 0)
break;
fprintf(stderr, "too many arguments [%s]\n", argv[i]);
exit(1);
} else {
if (i >= argc || argv[i] == NULL ||
strcmp(argv[i], ":") == 0) {
if (scall->sd_args[i] & TYPE_OPTIONAL) {
if (scall->sd_args[i] & TYPE_STRING) {
args[i].str = NULL;
}
if (scall->sd_args[i] & TYPE_NUMBER) {
args[i].num = OPTIONAL_NUMBER_SENTINEL;
}
continue;
}
fprintf(stderr, "too few arguments\n");
exit(1);
}
if (scall->sd_args[i] & TYPE_STRING) {
if (strcmp(argv[i], "NULL") == 0)
args[i].str = NULL;
else if (strcmp(argv[i], "DEADCODE") == 0)
args[i].str = (void *)0xdeadc0de;
else
args[i].str = argv[i];
} else if (scall->sd_args[i] & TYPE_NUMBER) {
args[i].num = strtoll(argv[i], &endp, 0);
if (*endp != '\0' && !isspace((unsigned char)*endp)) {
fprintf(stderr, "invalid argument %u, number expected [%s]\n", i, endp);
exit(1);
}
}
}
}
/*
* Call the given syscall.
*/
#define NUM(n) (args[(n)].num)
#define STR(n) (args[(n)].str)
switch (scall->sd_action) {
case ACTION_OPEN:
flags = str2flags(open_flags, STR(1));
if (flags & O_CREAT) {
if (NUM(2) == OPTIONAL_NUMBER_SENTINEL) {
fprintf(stderr, "too few arguments\n");
exit(1);
}
rval = open(STR(0), flags, (mode_t)NUM(2));
} else {
if (NUM(2) != OPTIONAL_NUMBER_SENTINEL) {
fprintf(stderr, "too many arguments\n");
exit(1);
}
rval = open(STR(0), flags);
}
break;
case ACTION_CREATE:
rval = open(STR(0), O_CREAT | O_EXCL, NUM(1));
if (rval >= 0)
close(rval);
break;
case ACTION_UNLINK:
rval = unlink(STR(0));
break;
case ACTION_MKDIR:
rval = mkdir(STR(0), NUM(1));
break;
case ACTION_RMDIR:
rval = rmdir(STR(0));
break;
case ACTION_LINK:
rval = link(STR(0), STR(1));
break;
case ACTION_SYMLINK:
rval = symlink(STR(0), STR(1));
break;
case ACTION_RENAME:
rval = rename(STR(0), STR(1));
break;
case ACTION_MKFIFO:
rval = mkfifo(STR(0), NUM(1));
break;
case ACTION_CHMOD:
rval = chmod(STR(0), NUM(1));
break;
#ifdef HAS_LCHMOD
case ACTION_LCHMOD:
rval = lchmod(STR(0), NUM(1));
break;
#endif
case ACTION_CHOWN:
rval = chown(STR(0), NUM(1), NUM(2));
break;
case ACTION_LCHOWN:
rval = lchown(STR(0), NUM(1), NUM(2));
break;
#ifdef HAS_CHFLAGS
case ACTION_CHFLAGS:
rval = chflags(STR(0), str2flags(chflags_flags, STR(1)));
break;
#endif
#ifdef HAS_LCHFLAGS
case ACTION_LCHFLAGS:
rval = lchflags(STR(0), str2flags(chflags_flags, STR(1)));
break;
#endif
case ACTION_TRUNCATE:
rval = truncate64(STR(0), NUM(1));
break;
case ACTION_STAT:
rval = stat64(STR(0), &sb);
if (rval == 0) {
show_stats(&sb, STR(1));
return (i);
}
break;
case ACTION_LSTAT:
rval = lstat64(STR(0), &sb);
if (rval == 0) {
show_stats(&sb, STR(1));
return (i);
}
break;
case ACTION_UTIME :
switch (i) {
case 1 :
rval = utime(STR(0), (struct utimbuf*)NULL);
break;
case 3:
ut.actime = NUM(1);
ut.modtime = NUM(2);
rval = utime(STR(0), &ut);
break;
default :
fprintf(stderr,"utime() requires 1 or 3 arguments\n");
exit(1);
}
break;
#ifdef HAS_ACL
case ACTION_GETFACL :
rval = do_getfacl(STR(0), STR(1));
if (rval == 0)
return (i);
break;
case ACTION_SETFACL :
rval = do_setfacl(STR(0), STR(1), STR(2));
break;
#endif
case ACTION_GETXATTR :
rval = do_getxattr(STR(0), STR(1));
if (rval == 0)
return (i);
break;
case ACTION_SETXATTR :
rval = do_setxattr(STR(0), STR(1), STR(2), STR(3));
break;
default:
fprintf(stderr, "unsupported syscall\n");
exit(1);
}
#undef STR
#undef NUM
if (rval < 0) {
const char *serrno;
serrno = err2str(errno);
fprintf(stderr, "%s returned %d\n", scall->sd_name, rval);
printf("%s\n", serrno);
exit(1);
}
printf("0\n");
return (i);
}
static void
set_gids(char *gids)
{
gid_t *gidset;
long ngroups;
char *g, *endp;
unsigned i;
ngroups = sysconf(_SC_NGROUPS_MAX);
assert(ngroups > 0);
gidset = malloc(sizeof(*gidset) * ngroups);
assert(gidset != NULL);
for (i = 0, g = strtok(gids, ","); g != NULL; g = strtok(NULL, ","), i++) {
if (i >= (unsigned int)ngroups) {
fprintf(stderr, "too many gids\n");
exit(1);
}
gidset[i] = strtol(g, &endp, 0);
if (*endp != '\0' && !isspace((unsigned char)*endp)) {
fprintf(stderr, "invalid gid '%s' - number expected\n",
g);
exit(1);
}
}
if (setgroups(i, gidset) < 0) {
fprintf(stderr, "cannot change groups: %s\n", strerror(errno));
exit(1);
}
if (setegid(gidset[0]) < 0) {
fprintf(stderr, "cannot change effective gid: %s\n", strerror(errno));
exit(1);
}
free(gidset);
}
int
main(int argc, char *argv[])
{
struct syscall_desc *scall;
unsigned int n;
char *gids, *endp;
int uid, umsk, ch;
uid = -1;
gids = NULL;
umsk = 0;
while ((ch = getopt(argc, argv, "g:u:U:")) != -1) {
switch(ch) {
case 'g':
gids = optarg;
break;
case 'u':
uid = (int)strtol(optarg, &endp, 0);
if (*endp != '\0' && !isspace((unsigned char)*endp)) {
fprintf(stderr, "invalid uid '%s' - number "
"expected\n", optarg);
exit(1);
}
break;
case 'U':
umsk = (int)strtol(optarg, &endp, 0);
if (*endp != '\0' && !isspace((unsigned char)*endp)) {
fprintf(stderr, "invalid umask '%s' - number "
"expected\n", optarg);
exit(1);
}
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc < 1) {
fprintf(stderr, "too few arguments\n");
usage();
}
if (gids != NULL) {
fprintf(stderr, "changing groups to %s\n", gids);
set_gids(gids);
}
if (uid != -1) {
fprintf(stderr, "changing uid to %d\n", uid);
if (setuid(uid) < 0) {
fprintf(stderr, "cannot change uid: %s\n",
strerror(errno));
exit(1);
}
}
/* Change umask to requested value or to 0, if not requested. */
umask(umsk);
while (argc > 0) {
scall = find_syscall(argv[0]);
if (scall == NULL) {
fprintf(stderr, "syscall '%s' not supported\n", argv[0]);
exit(1);
}
argc--;
argv++;
n = call_syscall(scall, argc, argv);
argc -= n;
argv += n;
if (argv[0] == NULL)
break;
argc--;
argv++;
}
exit(0);
}
static const char *
err2str(int error)
{
static char errnum[8];
switch (error) {
#ifdef EPERM
case EPERM:
return ("EPERM");
#endif
#ifdef ENOENT
case ENOENT:
return ("ENOENT");
#endif
#ifdef ESRCH
case ESRCH:
return ("ESRCH");
#endif
#ifdef EINTR
case EINTR:
return ("EINTR");
#endif
#ifdef EIO
case EIO:
return ("EIO");
#endif
#ifdef ENXIO
case ENXIO:
return ("ENXIO");
#endif
#ifdef E2BIG
case E2BIG:
return ("E2BIG");
#endif
#ifdef ENOEXEC
case ENOEXEC:
return ("ENOEXEC");
#endif
#ifdef EBADF
case EBADF:
return ("EBADF");
#endif
#ifdef ECHILD
case ECHILD:
return ("ECHILD");
#endif
#ifdef EDEADLK
case EDEADLK:
return ("EDEADLK");
#endif
#ifdef ENOMEM
case ENOMEM:
return ("ENOMEM");
#endif
#ifdef EACCES
case EACCES:
return ("EACCES");
#endif
#ifdef EFAULT
case EFAULT:
return ("EFAULT");
#endif
#ifdef ENOTBLK
case ENOTBLK:
return ("ENOTBLK");
#endif
#ifdef EBUSY
case EBUSY:
return ("EBUSY");
#endif
#ifdef EEXIST
case EEXIST:
return ("EEXIST");
#endif
#ifdef EXDEV
case EXDEV:
return ("EXDEV");
#endif
#ifdef ENODEV
case ENODEV:
return ("ENODEV");
#endif
#ifdef ENOTDIR
case ENOTDIR:
return ("ENOTDIR");
#endif
#ifdef EISDIR
case EISDIR:
return ("EISDIR");
#endif
#ifdef EINVAL
case EINVAL:
return ("EINVAL");
#endif
#ifdef ENFILE
case ENFILE:
return ("ENFILE");
#endif
#ifdef EMFILE
case EMFILE:
return ("EMFILE");
#endif
#ifdef ENOTTY
case ENOTTY:
return ("ENOTTY");
#endif
#ifdef ETXTBSY
case ETXTBSY: