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- RCS_ID_C="$Id: chown.c,v 4.2 1994/09/29 23:09:02 jraja Exp $";
- /*
- * chown.c - chown() for usergroup link library
- *
- * Copyright © 1994 AmiTCP/IP Group,
- * Network Solutions Development Inc.
- * All rights reserved.
- *
- * This function is based on SetOwner37 code
- * Copyright © 1993 by Geert Uytterhoeven
- */
-
-
- /****** net.lib/chown *********************************************************
-
- NAME
- chown - change owner and group of a file
-
- SYNOPSIS
- #include <unistd.h>
-
- success = chown(path, owner, group)
-
- int chown(const char *, uid_t, gid_t);
-
- DESCRIPTION
- The owner ID and group ID of the file named by path or referenced by
- fd is changed as specified by the arguments owner and group. The
- owner of a file may change the group to a group of which he or she is
- a member, but the change owner capability is restricted to the
- super-user.
-
- Chown() clears the set-user-id and set-group-id bits on the file to
- prevent accidental or mischievious creation of set-user-id and
- set-group-id programs.
-
- One of the owner or group id's may be left unchanged by specifying it
- as -1.
-
- If the final component of path is a symbolic link, the ownership and
- group of the symbolic link is changed, not the ownership and group of
- the file or directory to which it points.
-
- RETURN VALUES
- Zero is returned if the operation was successful; -1 is returned if an
- error occurs, with a more specific error code being placed in the
- global variable errno.
-
- ERRORS
- Chown() will fail and the file will be unchanged if:
-
- [ENOTDIR] A component of the path prefix is not a directory.
-
- [EINVAL] The pathname contains a character with the high-order
- bit set.
-
- [ENAMETOOLONG]
- A component of a pathname exceeded 80 characters, or an
- entire path name exceeded 1023 characters.
-
- [ENOENT] The named file does not exist.
-
- [EACCES] Search permission is denied for a component of the path
- prefix.
-
- [ELOOP] Too many symbolic links were encountered in translating
- the pathname.
-
- [EPERM] The effective user ID is not the super-user.
-
- [EROFS] The named file resides on a read-only file system.
-
- [EFAULT] Path points outside the process's allocated address
- space.
-
- [EIO] An I/O error occurred while reading from or writing to
- the file system.
-
- SEE ALSO
- chmod(2)
-
- *****************************************************************************
- */
-
- #include <libraries/usergroup.h>
- #include <proto/dos.h>
- #include <dos/dosextens.h>
-
- #include "netlib.h"
-
- #ifndef ACTION_SET_OWNER
- #define ACTION_SET_OWNER 1036
- #endif
-
- int chown(const char *name, uid_t uid, gid_t gid)
- {
- BPTR lock;
- short rc = -1;
-
- if (lock = Lock((STRPTR)name, ACCESS_READ)) {
- if (uid == -1 || gid == -1) {
- /* XXX We are supposed to do stat() and find out the suitable value */
-
- }
- rc = DoPkt(((struct FileLock *)BADDR(lock))->fl_Task,
- ACTION_SET_OWNER,
- NULL, lock, MKBADDR("\0"),
- (UG2MU(uid) << 16) | UG2MU(gid), NULL);
- UnLock(lock);
- }
-
- if (!rc) {
- set_errno(IoErr());
- return -1;
- } else {
- return 0;
- }
- }
-
- #ifdef DEBUGGING
- #include <proto/usergroup.h>
- #include <stdlib.h>
- #include <string.h>
- #include <exec/execbase.h>
- int errno;
- extern struct ExecBase *SysBase;
-
- void PrintUserFault(LONG code, const UBYTE *banner);
-
- const static char usage[] = "usage: chown [-fR] owner[:group] file ...";
-
- void main(int argc, char *argv[])
- {
- struct Process *p = (struct Process *)SysBase->ThisTask;
- BPTR Stderr = p->pr_CES ? p->pr_CES : p->pr_COS;
-
- short perrors = 1, recursive = 0;
- uid_t uid; gid_t gid = -1;
- char *group, *user;
-
- while (argc > 1 && argv[1][0] == '-') {
- switch (argv[1][1]) {
- case 'f':
- perrors = 0;
- break;
- case 'R':
- recursive = 1;
- break;
- default:
- FPrintf(Stderr, usage);
- exit(10);
- }
- argv++, argc--;
- }
-
- if (argc <= 2) {
- FPrintf(Stderr, usage);
- exit(10);
- }
-
- user = argv[1]; argv++, argc--;
- group = rindex(user, ':');
-
- if (group) {
- *group++ = '\0';
- if (StrToLong(group, &gid) < 1) {
- struct group *gr = getgrnam(group);
- if (gr) {
- gid = gr->gr_gid;
- } else {
- if (perrors)
- PrintUserFault(errno, "chown: getgrnam");
- exit(RETURN_ERROR);
- }
- }
- }
-
- if (StrToLong(user, &uid) < 1) {
- struct passwd *pw = getpwnam(user);
- if (pw) {
- uid = pw->pw_uid;
- } else {
- if (perrors)
- PrintUserFault(errno, "chown: getpwnam");
- exit(RETURN_ERROR);
- }
- }
-
- while (argc-- > 1) {
- if (chown(argv++[1], uid, gid) == -1) {
- if (perrors)
- PrintUserFault(errno, "chmod");
- exit(RETURN_ERROR);
- }
- }
-
- exit(0);
- }
- #endif
-