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If unprivileged, don't even look up user or group name. (always set uid and 

gid to -1.)  Don't bother checking 'unpriv' when it's redundant with the
uid/gid == -1 check.  (Doing the uid/gid handling consistently also fixes
the directory-creation code, which didn't check unpriv and did chmod/chown
anyway.)  One minor spaces/tabs cleanup at one of the uid/gid checks.
This commit is contained in:
cgd 2000-07-27 03:57:50 +00:00
parent 72b221b09c
commit 08f606dddb
1 changed files with 25 additions and 21 deletions
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20
usr.bin/xinstall/xinstall.c
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@ -1,4 +1,4 @@
/* $NetBSD: xinstall.c,v 1.40 2000/07/27 03:45:02 cgd Exp $ */
/* $NetBSD: xinstall.c,v 1.41 2000/07/27 03:57:50 cgd Exp $ */
/*
* Copyright (c) 1987, 1993
@ -43,7 +43,7 @@ __COPYRIGHT("@(#) Copyright (c) 1987, 1993\n\
#if 0
static char sccsid[] = "@(#)xinstall.c 8.1 (Berkeley) 7/21/93";
#else
__RCSID("$NetBSD: xinstall.c,v 1.40 2000/07/27 03:45:02 cgd Exp $");
__RCSID("$NetBSD: xinstall.c,v 1.41 2000/07/27 03:57:50 cgd Exp $");
#endif
#endif /* not lint */
@ -223,12 +223,18 @@ main(argc, argv)
usage();
/* get group and owner id's */
if (group && !(gp = getgrnam(group)) && !isdigit((unsigned char)*group))
if (unpriv)
uid = gid = -1;
else {
if (group && !(gp = getgrnam(group)) &&
!isdigit((unsigned char)*group))
errx(1, "unknown group %s", group);
gid = (group) ? ((gp) ? gp->gr_gid : atoi(group)) : -1;
if (owner && !(pp = getpwnam(owner)) && !isdigit((unsigned char)*owner))
if (owner && !(pp = getpwnam(owner)) &&
!isdigit((unsigned char)*owner))
errx(1, "unknown user %s", owner);
uid = (owner) ? ((pp) ? pp->pw_uid : atoi(owner)) : -1;
}
if (dodir) {
for (; *argv != NULL; ++argv)
@ -251,7 +257,7 @@ main(argc, argv)
if (stat(*argv, &from_sb))
err(1, "%s", *argv);
if (!S_ISREG(to_sb.st_mode))
errx(1, "%s: %s", to_name, strerror(EFTYPE));
errx(1, "%s: not a regular file", to_name);
if (!dolink && to_sb.st_dev == from_sb.st_dev &&
to_sb.st_ino == from_sb.st_ino)
errx(1, "%s and %s are the same file", *argv, to_name);
@ -359,7 +365,7 @@ install(from_name, to_name, fset, flags)
if (stat(from_name, &from_sb))
err(1, "%s", from_name);
if (!S_ISREG(from_sb.st_mode))
errx(1, "%s: %s", from_name, strerror(EFTYPE));
errx(1, "%s: not a regular file", to_name);
/* Build the target path. */
if (flags & DIRECTORY) {
(void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s",
@ -442,7 +448,6 @@ install(from_name, to_name, fset, flags)
err(1, "stripping %s", to_name);
}
if (!unpriv) {
/*
* Set owner, group, mode for target; do the chown first,
* chown may lose the setuid bits.
@ -452,7 +457,6 @@ install(from_name, to_name, fset, flags)
(void)unlink(to_name);
errx(1, "%s: chown/chgrp: %s", to_name, strerror(serrno));
}
}
if (fchmod(to_fd, mode)) {
serrno = errno;
(void)unlink(to_name);