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newlib/winsup/utils/setfacl.c
Corinna Vinschen ce63785554 * getfacl.c: Add copyright hint. 
* setfacl.c: Ditto.
        * strace.cc: Ditto.
2001-03-05 17:55:23 +00:00

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/* setfacl.c
Copyright 2000, 2001 Red Hat Inc.
Written by Corinna Vinschen <vinschen@redhat.com>
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <getopt.h>
#include <pwd.h>
#include <grp.h>
#include <sys/types.h>
#include <sys/acl.h>
#ifndef BOOL
#define BOOL int
#endif
#ifndef TRUE
#define TRUE (1)
#endif
#ifndef FALSE
#define FALSE (0)
#endif
#ifndef ILLEGAL_MODE
#define ILLEGAL_MODE ((mode_t)0xffffffff)
#endif
typedef enum {
NoAction,
Set,
Modify,
Delete,
ModNDel,
SetFromFile
} action_t;
char *myname;
int usage ()
{
fprintf(stderr, "usage: %s [-r] -s acl_entries file...\n", myname);
fprintf(stderr, " %s [-r] -md acl_entries file...\n", myname);
fprintf(stderr, " %s [-r] -f acl_file file...\n", myname);
return 1;
}
mode_t getperm (char *in)
{
if (isdigit (*in) && !in[1])
{
int i = atoi (in);
if (i < 0 || i > 7)
return ILLEGAL_MODE;
return i << 6 | i << 3 | i;
}
if (strlen (in) != 3)
return ILLEGAL_MODE;
if (!strchr ("r-", in[0])
|| !strchr ("w-", in[1])
|| !strchr ("x-", in[2]))
return ILLEGAL_MODE;
return (in[0] == 'r' ? S_IRUSR | S_IRGRP | S_IROTH : 0)
| (in[1] == 'w' ? S_IWUSR | S_IWGRP | S_IWOTH : 0)
| (in[2] == 'x' ? S_IXUSR | S_IXGRP | S_IXOTH : 0);
}
BOOL
getaclentry (action_t action, char *c, aclent_t *ace)
{
char *c2;
ace->a_type = 0;
ace->a_id = 0;
ace->a_perm = 0;
if (!strncmp (c, "default:", 8)
|| !strncmp (c, "d:", 2))
{
ace->a_type = ACL_DEFAULT;
c = strchr (c, ':') + 1;
}
if (!strncmp (c, "user:", 5)
|| !strncmp (c, "u:", 2))
{
ace->a_type |= USER_OBJ;
c = strchr (c, ':') + 1;
}
else if (!strncmp (c, "group:", 6)
|| !strncmp (c, "g:", 2))
{
ace->a_type |= GROUP_OBJ;
c = strchr (c, ':') + 1;
}
else if (!strncmp (c, "mask:", 5)
|| !strncmp (c, "m:", 2))
{
if (!(ace->a_type & ACL_DEFAULT))
return FALSE;
ace->a_type |= CLASS_OBJ;
c = strchr (c, ':') + 1;
}
else if (!strncmp (c, "other:", 6)
|| !strncmp (c, "o:", 2))
{
if (!(ace->a_type & ACL_DEFAULT))
return FALSE;
ace->a_type |= OTHER_OBJ;
c = strchr (c, ':') + 1;
}
else
return FALSE;
if (ace->a_type & (USER_OBJ | GROUP_OBJ))
{
if ((c2 = strchr (c, ':')))
{
if (action == Delete)
return FALSE;
*c2 = '\0';
}
else if (action != Delete)
return FALSE;
if (c2 == c)
{
if (action == Delete)
return FALSE;
}
else if (isdigit (*c))
{
char *c3;
ace->a_id = strtol (c, &c3, 10);
if (*c3)
return FALSE;
}
else if (ace->a_type & USER_OBJ)
{
struct passwd *pw = getpwnam (c);
if (!pw)
return FALSE;
ace->a_id = pw->pw_uid;
}
else
{
struct group *gr = getgrnam (c);
if (!gr)
return FALSE;
ace->a_id = gr->gr_gid;
}
if (ace->a_type & USER_OBJ)
{
ace->a_type &= ~USER_OBJ;
ace->a_type |= USER;
}
else
{
ace->a_type &= ~GROUP_OBJ;
ace->a_type |= GROUP;
}
if (c2)
c = c2 + 1;
}
if (action == Delete)
{
if ((ace->a_type & (CLASS_OBJ | OTHER_OBJ))
&& *c)
return FALSE;
ace->a_perm = ILLEGAL_MODE;
return TRUE;
}
if ((ace->a_perm = getperm (c)) == ILLEGAL_MODE)
return FALSE;
return TRUE;
}
BOOL
getaclentries (action_t action, char *buf, aclent_t *acls, int *idx)
{
char *c;
if (action == SetFromFile)
{
FILE *fp;
char fbuf[256];
if (! (fp = fopen (buf, "r")))
return FALSE;
while (fgets (fbuf, 256, fp))
{
if (!getaclentry (action, fbuf, acls + (*idx)++))
{
fclose (fp);
return FALSE;
}
}
fclose (fp);
}
else
for (c = strtok (buf, ","); c; c = strtok (NULL, ","))
if (!getaclentry (action, c, acls + (*idx)++))
return FALSE;
return TRUE;
}
int
searchace (aclent_t *aclp, int nentries, int type, int id)
{
int i;
for (i = 0; i < nentries; ++i)
if ((aclp[i].a_type == type && (id < 0 || aclp[i].a_id == id))
|| !aclp[i].a_type)
return i;
return -1;
}
int
modacl (aclent_t *tgt, int tcnt, aclent_t *src, int scnt)
{
int t, s, i;
for (s = 0; s < scnt; ++s)
{
t = searchace (tgt, MAX_ACL_ENTRIES, src[s].a_type,
(src[s].a_type & (USER | GROUP)) ? src[s].a_id : -1);
if (t < 0)
return -1;
if (src[s].a_perm == ILLEGAL_MODE)
{
if (t < tcnt)
{
for (i = t + 1; i < tcnt; ++i)
tgt[i - 1] = tgt[i];
--tcnt;
}
}
else
{
tgt[t] = src[s];
if (t >= tcnt)
++tcnt;
}
}
return tcnt;
}
void
setfacl (action_t action, char *path, aclent_t *acls, int cnt)
{
aclent_t lacl[MAX_ACL_ENTRIES];
int lcnt;
memset (lacl, 0, sizeof lacl);
if (action == Set)
{
if (acl (path, SETACL, cnt, acls))
perror (myname);
return;
}
if ((lcnt = acl (path, GETACL, MAX_ACL_ENTRIES, lacl)) < 0
|| (lcnt = modacl (lacl, lcnt, acls, cnt)) < 0
|| (lcnt = acl (path, SETACL, lcnt, lacl)) < 0)
perror (myname);
}
int
main (int argc, char **argv)
{
extern char *optarg;
extern int optind;
int c;
action_t action = NoAction;
int ropt = 0;
aclent_t acls[MAX_ACL_ENTRIES];
int aclidx = 0;
myname = argv[0];
memset (acls, 0, sizeof acls);
while ((c = getopt (argc, argv, "d:f:m:rs:")) != EOF)
switch (c)
{
case 'd':
if (action == NoAction)
action = Delete;
else if (action == Modify)
action = ModNDel;
else
return usage ();
if (! getaclentries (Delete, optarg, acls, &aclidx))
{
fprintf (stderr, "%s: illegal acl entries\n", myname);
return 2;
}
break;
case 'f':
if (action == NoAction)
action = Set;
else
return usage ();
if (! getaclentries (SetFromFile, optarg, acls, &aclidx))
{
fprintf (stderr, "%s: illegal acl entries\n", myname);
return 2;
}
break;
case 'm':
if (action == NoAction)
action = Modify;
else if (action == Delete)
action = ModNDel;
else
return usage ();
if (! getaclentries (Modify, optarg, acls, &aclidx))
{
fprintf (stderr, "%s: illegal acl entries\n", myname);
return 2;
}
break;
case 'r':
if (!ropt)
ropt = 1;
else
return usage ();
break;
case 's':
if (action == NoAction)
action = Set;
else
return usage ();
break;
if (! getaclentries (Set, optarg, acls, &aclidx))
{
fprintf (stderr, "%s: illegal acl entries\n", myname);
return 2;
}
default:
return usage ();
}
if (action == NoAction)
return usage ();
if (optind > argc - 1)
return usage ();
if (action == Set)
switch (aclcheck (acls, aclidx, NULL))
{
case GRP_ERROR:
fprintf (stderr, "%s: more than one group entry.\n", myname);
return 2;
case USER_ERROR:
fprintf (stderr, "%s: more than one user entry.\n", myname);
return 2;
case CLASS_ERROR:
fprintf (stderr, "%s: more than one mask entry.\n", myname);
return 2;
case OTHER_ERROR:
fprintf (stderr, "%s: more than one other entry.\n", myname);
return 2;
case DUPLICATE_ERROR:
fprintf (stderr, "%s: duplicate additional user or group.\n", myname);
return 2;
case ENTRY_ERROR:
fprintf (stderr, "%s: invalid entry type.\n", myname);
return 2;
case MISS_ERROR:
fprintf (stderr, "%s: missing entries.\n", myname);
return 2;
case MEM_ERROR:
fprintf (stderr, "%s: out of memory.\n", myname);
return 2;
default:
break;
}
for (c = optind; c < argc; ++c)
setfacl (action, argv[c], acls, aclidx);
return 0;
}
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