2 * Copryight 1997 Sean Eric Fagan
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. All advertising materials mentioning features or use of this software
13 * must display the following acknowledgement:
14 * This product includes software developed by Sean Eric Fagan
15 * 4. Neither the name of the author may be used to endorse or promote
16 * products derived from this software without specific prior written
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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31 * $FreeBSD: src/usr.bin/truss/syscalls.c,v 1.10.2.6 2003/04/14 18:24:38 mdodd Exp $
35 * This file has routines used to print out system calls and their
39 #include <sys/types.h>
40 #include <sys/socket.h>
42 #include <netinet/in.h>
43 #include <arpa/inet.h>
58 * This should probably be in its own file.
61 struct syscall syscalls[] = {
63 { { String, 0 } , { String | OUT, 1 }, { Int, 2 }}},
65 { { Int, 0 }, {Quad, 2 }, { Int, 4 }}},
67 { { Hex, 0 }, {Int, 1}, {Hex, 2}, {Hex, 3}, {Int, 4}, {Quad, 6}}},
69 { { String | IN, 0} , { Hex, 1}, {Octal, 2}}},
70 { "close", 1, 1, { { Int, 0 } } },
72 { { Int, 0}, {Ptr | OUT , 1 }}},
74 { { String | IN, 0 }, { Ptr | OUT, 1 }}},
76 { { String | IN, 0 }, { Ptr | OUT, 1 }}},
78 { { Int, 0}, { Ptr | IN, 1 }, { Int, 2 }}},
80 { { Int, 0}, { Ioctl, 1 }, { Hex, 2 }}},
81 { "break", 1, 1, { { Hex, 0 }}},
82 { "exit", 0, 1, { { Hex, 0 }}},
83 { "access", 1, 2, { { String | IN, 0 }, { Int, 1 }}},
85 { { Signal, 0 }, { Ptr | IN, 1 }, { Ptr | OUT, 2 }}},
87 { { Hex, 0 }, { Sockaddr | OUT, 1 }, { Ptr | OUT, 2 } } },
89 { { Hex, 0 }, { Sockaddr | IN, 1 }, { Int, 2 } } },
91 { { Hex, 0 }, { Sockaddr | IN, 1 }, { Int, 2 } } },
92 { "getpeername", 1, 3,
93 { { Hex, 0 }, { Sockaddr | OUT, 1 }, { Ptr | OUT, 2 } } },
94 { "getsockname", 1, 3,
95 { { Hex, 0 }, { Sockaddr | OUT, 1 }, { Ptr | OUT, 2 } } },
96 { 0, 0, 0, { { 0, 0 }}},
100 * If/when the list gets big, it might be desirable to do it
101 * as a hash table or binary search.
105 get_syscall(const char *name) {
106 struct syscall *sc = syscalls;
109 if (!strcmp(name, sc->name))
119 * Copy a fixed amount of bytes from the process.
123 get_struct(int procfd, void *offset, void *buf, int len) {
128 if ((fd = dup(procfd)) == -1)
130 if ((p = fdopen(fd, "r")) == NULL)
132 fseeko(p, (uintptr_t)offset, SEEK_SET);
133 for (pos = (char *)buf; len--; pos++) {
134 if ((c = fgetc(p)) == EOF)
144 * Copy a string from the process. Note that it is
145 * expected to be a C string, but if max is set, it will
146 * only get that much.
150 get_string(int procfd, void *offset, int max) {
152 int size, len, c, fd;
155 if ((fd = dup(procfd)) == -1)
157 if ((p = fdopen(fd, "r")) == NULL)
159 buf = malloc( size = (max ? max : 64 ) );
162 fseeko(p, (uintptr_t)offset, SEEK_SET);
163 while ((c = fgetc(p)) != EOF) {
165 if (c == 0 || len == max) {
171 tmp = realloc(buf, size+64);
187 * Gag. This is really unportable. Multiplication is more portable.
188 * But slower, from the code I saw.
192 make_quad(unsigned long p1, unsigned long p2) {
205 * Converts a syscall argument into a string. Said string is
206 * allocated via malloc(), so needs to be free()'d. The file
207 * descriptor is for the process' memory (via /proc), and is used
208 * to get any data (where the argument is a pointer). sc is
209 * a pointer to the syscall description (see above); args is
210 * an array of all of the system call arguments.
214 print_arg(int fd, struct syscall_args *sc, unsigned long *args) {
216 switch (sc->type & ARG_MASK) {
219 sprintf(tmp, "0x%lx", args[sc->offset]);
223 sprintf(tmp, "0%lo", args[sc->offset]);
227 sprintf(tmp, "%ld", args[sc->offset]);
232 tmp2 = get_string(fd, (void*)args[sc->offset], 0);
233 tmp = malloc(strlen(tmp2) + 3);
234 sprintf(tmp, "\"%s\"", tmp2);
240 unsigned long long t;
241 unsigned long l1, l2;
242 l1 = args[sc->offset];
243 l2 = args[sc->offset+1];
244 t = make_quad(l1, l2);
246 sprintf(tmp, "0x%qx", t);
251 sprintf(tmp, "0x%lx", args[sc->offset]);
255 const char *temp = ioctlname(args[sc->offset]);
260 sprintf(tmp, "0x%lx", args[sc->offset]);
268 sig = args[sc->offset];
270 if (sig > 0 && sig < NSIG) {
272 sprintf(tmp, "sig%s", sys_signame[sig]);
273 for (i = 0; tmp[i] != '\0'; ++i)
274 tmp[i] = toupper(tmp[i]);
276 sprintf(tmp, "%ld", sig);
282 struct sockaddr_storage ss;
284 struct sockaddr_in *lsin;
285 struct sockaddr_in6 *lsin6;
286 struct sockaddr_un *sun;
292 /* yuck: get ss_len */
293 if (get_struct(fd, (void *)args[sc->offset], &ss,
294 sizeof(ss.ss_len) + sizeof(ss.ss_family)) == -1)
295 err(1, "get_struct %p", (void *)args[sc->offset]);
296 /* sockaddr_un never have the length filled in! */
297 if (ss.ss_family == AF_UNIX) {
298 if (get_struct(fd, (void *)args[sc->offset], &ss,
301 err(2, "get_struct %p", (void *)args[sc->offset]);
303 if (get_struct(fd, (void *)args[sc->offset], &ss,
304 ss.ss_len < sizeof(ss) ? ss.ss_len : sizeof(ss))
306 err(2, "get_struct %p", (void *)args[sc->offset]);
309 switch (ss.ss_family) {
311 lsin = (struct sockaddr_in *)&ss;
312 inet_ntop(AF_INET, &lsin->sin_addr, addr, sizeof addr);
313 asprintf(&tmp, "{ AF_INET %s:%d }", addr, htons(lsin->sin_port));
316 lsin6 = (struct sockaddr_in6 *)&ss;
317 inet_ntop(AF_INET6, &lsin6->sin6_addr, addr, sizeof addr);
318 asprintf(&tmp, "{ AF_INET6 [%s]:%d }", addr, htons(lsin6->sin6_port));
321 sun = (struct sockaddr_un *)&ss;
322 asprintf(&tmp, "{ AF_UNIX \"%s\" }", sun->sun_path);
325 sa = (struct sockaddr *)&ss;
326 asprintf(&tmp, "{ sa_len = %d, sa_family = %d, sa_data = {%n%*s } }",
327 (int)sa->sa_len, (int)sa->sa_family, &i,
328 6 * (int)(sa->sa_len - ((char *)&sa->sa_data - (char *)sa)), "");
331 for (q = (u_char *)&sa->sa_data; q < (u_char *)sa + sa->sa_len; q++)
332 p += sprintf(p, " %#02x,", *q);
343 * Print (to trussinfo->outfile) the system call and its arguments. Note that
344 * nargs is the number of arguments (not the number of words; this is
345 * potentially confusing, I know).
349 print_syscall(struct trussinfo *trussinfo, const char *name, int nargs, char **s_args) {
352 len += fprintf(trussinfo->outfile, "%s(", name);
353 for (i = 0; i < nargs; i++) {
355 len += fprintf(trussinfo->outfile, "%s", s_args[i]);
357 len += fprintf(trussinfo->outfile, "<missing argument>");
358 len += fprintf(trussinfo->outfile, "%s", i < (nargs - 1) ? "," : "");
360 len += fprintf(trussinfo->outfile, ")");
361 for (i = 0; i < 6 - (len / 8); i++)
362 fprintf(trussinfo->outfile, "\t");
366 print_syscall_ret(struct trussinfo *trussinfo, const char *name, int nargs, char **s_args, int errorp, int retval) {
367 print_syscall(trussinfo, name, nargs, s_args);
369 fprintf(trussinfo->outfile, " ERR#%d '%s'\n", retval, strerror(retval));
371 fprintf(trussinfo->outfile, " = %d (0x%x)\n", retval, retval);