mirror of
https://codeberg.org/noisytoot/notnotdnethack.git
synced 2024-09-19 22:14:48 +01:00
Ron Nazarov
bd8b743c9a
Now compiles with gcc -Werror=old-style-definition. It should also be valid C23, although I haven't tried compiling with -std=c2x yet - there might be something else making it invalid. This also allows getting rid of (UN)WIDENED_PROTOTYPES and _P defines. I kept OBJ_P, MONST_P, and DLB_P for now. Done mostly by running cproto -Iinclude -C"int\nf(\n\ta,\n\tb)" -F"int\nf(a, b)" -pa then sed -i 's/^\(\(static \)\?[a-zA-Z]\+\) $/\1/' on each file, with some manual corrections/adjustments done after and anything cproto can't handle manually converted. The sed is to remove the extra space that cproto adds at the end of the line with the return type name. "register" is inconsistently sometimes removed - generally, I removed it when I did it manually but cproto didn't. GCC ignores register anyway so this shouldn't matter much.
125 lines
2.4 KiB
C
125 lines
2.4 KiB
C
/* SCCS Id: @(#)unixres.c 3.4 2001/07/08 */
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/* Copyright (c) Slash'EM development team, 2001. */
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/* NetHack may be freely redistributed. See license for details. */
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/* [ALI] This module defines nh_xxx functions to replace getuid etc which
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* will hide privileges from the caller if so desired.
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*
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* Currently supported UNIX variants:
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* Linux version 2.1.44 and above
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* FreeBSD (versions unknown)
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*
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* Note: SunOS and Solaris have no mechanism for retrieving the saved id,
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* so temporarily dropping privileges on these systems is sufficient to
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* hide them.
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*/
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#include "config.h"
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#ifdef GETRES_SUPPORT
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/* requires dynamic linking with libc */
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#include <dlfcn.h>
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static int
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real_getresuid(ruid, euid, suid)
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uid_t *ruid, *euid, *suid;
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{
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int (*f)(uid_t *, uid_t *, uid_t *); /* getresuid signature */
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f = dlsym(RTLD_NEXT, "getresuid");
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if (!f) return -1;
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return f(ruid, euid, suid);
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}
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static int
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real_getresgid(rgid, egid, sgid)
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gid_t *rgid, *egid, *sgid;
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{
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int (*f)(gid_t *, gid_t *, gid_t *); /* getresgid signature */
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f = dlsym(RTLD_NEXT, "getresgid");
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if (!f) return -1;
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return f(rgid, egid, sgid);
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}
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static unsigned int hiding_privileges = 0;
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/*
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* Note: returns the value _after_ action.
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*/
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int
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hide_privileges(boolean flag)
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{
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if (flag)
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hiding_privileges++;
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else if (hiding_privileges)
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hiding_privileges--;
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return hiding_privileges;
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}
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int
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nh_getresuid(ruid, euid, suid)
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uid_t *ruid, *euid, *suid;
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{
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int retval = real_getresuid(ruid, euid, suid);
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if (!retval && hiding_privileges)
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*euid = *suid = *ruid;
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return retval;
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}
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uid_t
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nh_getuid()
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{
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uid_t ruid, euid, suid;
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(void) real_getresuid(&ruid, &euid, &suid);
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return ruid;
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}
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uid_t
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nh_geteuid()
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{
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uid_t ruid, euid, suid;
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(void) real_getresuid(&ruid, &euid, &suid);
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if (hiding_privileges)
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euid = ruid;
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return euid;
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}
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int
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nh_getresgid(rgid, egid, sgid)
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gid_t *rgid, *egid, *sgid;
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{
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int retval = real_getresgid(rgid, egid, sgid);
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if (!retval && hiding_privileges)
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*egid = *sgid = *rgid;
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return retval;
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}
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gid_t
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nh_getgid()
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{
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gid_t rgid, egid, sgid;
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(void) real_getresgid(&rgid, &egid, &sgid);
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return rgid;
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}
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gid_t
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nh_getegid()
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{
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gid_t rgid, egid, sgid;
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(void) real_getresgid(&rgid, &egid, &sgid);
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if (hiding_privileges)
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egid = rgid;
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return egid;
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}
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#else /* GETRES_SUPPORT */
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#endif /* GETRES_SUPPORT */
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