uid.c revision 530bed0ca8285188ce6cbc9406e817da0ef4828b 
1#ifdef STRACE_UID_SIZE
2# if STRACE_UID_SIZE != 16
3#  error invalid STRACE_UID_SIZE
4# endif
5
6# define SIZEIFY(x)		SIZEIFY_(x,STRACE_UID_SIZE)
7# define SIZEIFY_(x,size)	SIZEIFY__(x,size)
8# define SIZEIFY__(x,size)	x ## size
9
10# define printuid	SIZEIFY(printuid)
11# define sys_chown	SIZEIFY(sys_chown)
12# define sys_fchown	SIZEIFY(sys_fchown)
13# define sys_getgroups	SIZEIFY(sys_getgroups)
14# define sys_getresuid	SIZEIFY(sys_getresuid)
15# define sys_getuid	SIZEIFY(sys_getuid)
16# define sys_setfsuid	SIZEIFY(sys_setfsuid)
17# define sys_setgroups	SIZEIFY(sys_setgroups)
18# define sys_setresuid	SIZEIFY(sys_setresuid)
19# define sys_setreuid	SIZEIFY(sys_setreuid)
20# define sys_setuid	SIZEIFY(sys_setuid)
21#endif /* STRACE_UID_SIZE */
22
23#include "defs.h"
24
25#ifdef STRACE_UID_SIZE
26# if !NEED_UID16_PARSERS
27#  undef STRACE_UID_SIZE
28# endif
29#else
30# define STRACE_UID_SIZE 32
31#endif
32
33#ifdef STRACE_UID_SIZE
34
35# undef uid_t
36# define uid_t		uid_t_(STRACE_UID_SIZE)
37# define uid_t_(size)	uid_t__(size)
38# define uid_t__(size)	uint ## size ## _t
39
40int
41sys_getuid(struct tcb *tcp)
42{
43	if (exiting(tcp))
44		tcp->u_rval = (uid_t) tcp->u_rval;
45	return RVAL_UDECIMAL;
46}
47
48int
49sys_setfsuid(struct tcb *tcp)
50{
51	if (entering(tcp))
52		tprintf("%u", (uid_t) tcp->u_arg[0]);
53	else
54		tcp->u_rval = (uid_t) tcp->u_rval;
55	return RVAL_UDECIMAL;
56}
57
58int
59sys_setuid(struct tcb *tcp)
60{
61	if (entering(tcp)) {
62		tprintf("%u", (uid_t) tcp->u_arg[0]);
63	}
64	return 0;
65}
66
67static void
68get_print_uid(struct tcb *tcp, const char *prefix, const long addr)
69{
70	uid_t uid;
71
72	if (umove(tcp, addr, &uid) < 0)
73		tprintf("%s%#lx", prefix, addr);
74	else
75		tprintf("%s[%u]", prefix, uid);
76}
77
78int
79sys_getresuid(struct tcb *tcp)
80{
81	if (exiting(tcp)) {
82		if (syserror(tcp)) {
83			tprintf("%#lx, %#lx, %#lx", tcp->u_arg[0],
84				tcp->u_arg[1], tcp->u_arg[2]);
85		} else {
86			get_print_uid(tcp, "", tcp->u_arg[0]);
87			get_print_uid(tcp, ", ", tcp->u_arg[1]);
88			get_print_uid(tcp, ", ", tcp->u_arg[2]);
89		}
90	}
91	return 0;
92}
93
94int
95sys_setreuid(struct tcb *tcp)
96{
97	if (entering(tcp)) {
98		printuid("", tcp->u_arg[0]);
99		printuid(", ", tcp->u_arg[1]);
100	}
101	return 0;
102}
103
104int
105sys_setresuid(struct tcb *tcp)
106{
107	if (entering(tcp)) {
108		printuid("", tcp->u_arg[0]);
109		printuid(", ", tcp->u_arg[1]);
110		printuid(", ", tcp->u_arg[2]);
111	}
112	return 0;
113}
114
115int
116sys_chown(struct tcb *tcp)
117{
118	if (entering(tcp)) {
119		printpath(tcp, tcp->u_arg[0]);
120		printuid(", ", tcp->u_arg[1]);
121		printuid(", ", tcp->u_arg[2]);
122	}
123	return 0;
124}
125
126int
127sys_fchown(struct tcb *tcp)
128{
129	if (entering(tcp)) {
130		printfd(tcp, tcp->u_arg[0]);
131		printuid(", ", tcp->u_arg[1]);
132		printuid(", ", tcp->u_arg[2]);
133	}
134	return 0;
135}
136
137void
138printuid(const char *text, const unsigned int uid)
139{
140	if ((unsigned int) -1 == uid || (uid_t) -1 == uid)
141		tprintf("%s-1", text);
142	else
143		tprintf("%s%u", text, uid);
144}
145
146int
147sys_setgroups(struct tcb *tcp)
148{
149	if (entering(tcp)) {
150		unsigned long len, size, start, cur, end, abbrev_end;
151		uid_t gid;
152		int failed = 0;
153
154		len = tcp->u_arg[0];
155		tprintf("%lu, ", len);
156		if (len == 0) {
157			tprints("[]");
158			return 0;
159		}
160		start = tcp->u_arg[1];
161		if (start == 0) {
162			tprints("NULL");
163			return 0;
164		}
165		size = len * sizeof(gid);
166		end = start + size;
167		if (!verbose(tcp) || size / sizeof(gid) != len || end < start) {
168			tprintf("%#lx", start);
169			return 0;
170		}
171		if (abbrev(tcp)) {
172			abbrev_end = start + max_strlen * sizeof(gid);
173			if (abbrev_end < start)
174				abbrev_end = end;
175		} else {
176			abbrev_end = end;
177		}
178		tprints("[");
179		for (cur = start; cur < end; cur += sizeof(gid)) {
180			if (cur > start)
181				tprints(", ");
182			if (cur >= abbrev_end) {
183				tprints("...");
184				break;
185			}
186			if (umoven(tcp, cur, sizeof(gid), (char *) &gid) < 0) {
187				tprints("?");
188				failed = 1;
189				break;
190			}
191			tprintf("%u", (unsigned int) gid);
192		}
193		tprints("]");
194		if (failed)
195			tprintf(" %#lx", tcp->u_arg[1]);
196	}
197	return 0;
198}
199
200int
201sys_getgroups(struct tcb *tcp)
202{
203	unsigned long len;
204
205	if (entering(tcp)) {
206		len = tcp->u_arg[0];
207		tprintf("%lu, ", len);
208	} else {
209		unsigned long size, start, cur, end, abbrev_end;
210		uid_t gid;
211		int failed = 0;
212
213		start = tcp->u_arg[1];
214		if (start == 0) {
215			tprints("NULL");
216			return 0;
217		}
218		len = tcp->u_rval;
219		if (len == 0) {
220			tprints("[]");
221			return 0;
222		}
223		size = len * sizeof(gid);
224		end = start + size;
225		if (!verbose(tcp) || tcp->u_arg[0] == 0 ||
226		    size / sizeof(gid) != len || end < start) {
227			tprintf("%#lx", start);
228			return 0;
229		}
230		if (abbrev(tcp)) {
231			abbrev_end = start + max_strlen * sizeof(gid);
232			if (abbrev_end < start)
233				abbrev_end = end;
234		} else {
235			abbrev_end = end;
236		}
237		tprints("[");
238		for (cur = start; cur < end; cur += sizeof(gid)) {
239			if (cur > start)
240				tprints(", ");
241			if (cur >= abbrev_end) {
242				tprints("...");
243				break;
244			}
245			if (umoven(tcp, cur, sizeof(gid), (char *) &gid) < 0) {
246				tprints("?");
247				failed = 1;
248				break;
249			}
250			tprintf("%u", (unsigned int) gid);
251		}
252		tprints("]");
253		if (failed)
254			tprintf(" %#lx", tcp->u_arg[1]);
255	}
256	return 0;
257}
258
259#endif /* STRACE_UID_SIZE */
260