2 * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
3 * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
4 * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40 #include <sys/types.h>
47 /* Open-coding isprint(ch) et al proved more efficient than calling
48 * generalized libc interface. We don't *want* to do non-ASCII anyway.
50 /* #include <ctype.h> */
56 #include <sys/syscall.h>
59 const char *strerror(int);
62 /* Some libc have stpcpy, some don't. Sigh...
63 * Roll our private implementation...
66 #define stpcpy strace_stpcpy
67 extern char *stpcpy(char *dst, const char *src);
71 # define __attribute__(x) /*nothing*/
75 # define offsetof(type, member) \
76 (((char *) &(((type *) NULL)->member)) - ((char *) (type *) NULL))
79 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
83 # define MAX(a, b) (((a) > (b)) ? (a) : (b))
86 # define MIN(a, b) (((a) < (b)) ? (a) : (b))
88 #define CLAMP(val, min, max) MIN(MAX(min, val), max)
90 /* Glibc has an efficient macro for sigemptyset
91 * (it just does one or two assignments of 0 to internal vector of longs).
93 #if defined(__GLIBC__) && defined(__sigemptyset) && !defined(sigemptyset)
94 # define sigemptyset __sigemptyset
97 /* Configuration section */
98 #ifndef DEFAULT_STRLEN
99 /* default maximum # of bytes printed in `printstr', change with -s switch */
100 # define DEFAULT_STRLEN 32
102 #ifndef DEFAULT_ACOLUMN
103 # define DEFAULT_ACOLUMN 40 /* default alignment column for results */
106 * Maximum number of args to a syscall.
108 * Make sure that all entries in all syscallent.h files have nargs <= MAX_ARGS!
109 * linux/<ARCH>/syscallent*.h:
110 * all have nargs <= 6 except mips o32 which has nargs <= 7.
113 # ifdef LINUX_MIPSO32
119 /* default sorting method for call profiling */
120 #ifndef DEFAULT_SORTBY
121 # define DEFAULT_SORTBY "time"
124 * Experimental code using PTRACE_SEIZE can be enabled here.
125 * This needs Linux kernel 3.4.x or later to work.
128 /* To force NOMMU build, set to 1 */
129 #define NOMMU_SYSTEM 0
131 * Set to 1 to use speed-optimized vfprintf implementation.
132 * It results in strace using about 5% less CPU in user space
133 * (compared to glibc version).
134 * But strace spends a lot of time in kernel space,
135 * so overall it does not appear to be a significant win.
136 * Thus disabled by default.
138 #define USE_CUSTOM_PRINTF 0
141 # define ERESTARTSYS 512
143 #ifndef ERESTARTNOINTR
144 # define ERESTARTNOINTR 513
146 #ifndef ERESTARTNOHAND
147 # define ERESTARTNOHAND 514
149 #ifndef ERESTART_RESTARTBLOCK
150 # define ERESTART_RESTARTBLOCK 516
153 #if defined(SPARC) || defined(SPARC64)
154 # define PERSONALITY0_WORDSIZE 4
155 # define PERSONALITY1_WORDSIZE 4
156 # if defined(SPARC64)
157 # define SUPPORTED_PERSONALITIES 3
158 # define PERSONALITY2_WORDSIZE 8
160 # define SUPPORTED_PERSONALITIES 2
161 # endif /* SPARC64 */
162 #endif /* SPARC[64] */
165 # define SUPPORTED_PERSONALITIES 3
166 # define PERSONALITY0_WORDSIZE 8
167 # define PERSONALITY1_WORDSIZE 4
168 # define PERSONALITY2_WORDSIZE 4
172 # define SUPPORTED_PERSONALITIES 2
173 # define PERSONALITY0_WORDSIZE 4
174 # define PERSONALITY1_WORDSIZE 4
178 /* one personality */
182 /* The existing ARM personality, then AArch64 */
183 # define SUPPORTED_PERSONALITIES 2
184 # define PERSONALITY0_WORDSIZE 4
185 # define PERSONALITY1_WORDSIZE 8
186 # define DEFAULT_PERSONALITY 1
190 # define SUPPORTED_PERSONALITIES 2
191 # define PERSONALITY0_WORDSIZE 8
192 # define PERSONALITY1_WORDSIZE 4
196 # define SUPPORTED_PERSONALITIES 2
197 # define PERSONALITY0_WORDSIZE 8
198 # define PERSONALITY1_WORDSIZE 4
200 # define DEFAULT_PERSONALITY 1
204 #ifndef SUPPORTED_PERSONALITIES
205 # define SUPPORTED_PERSONALITIES 1
207 #ifndef DEFAULT_PERSONALITY
208 # define DEFAULT_PERSONALITY 0
210 #ifndef PERSONALITY0_WORDSIZE
211 # define PERSONALITY0_WORDSIZE SIZEOF_LONG
214 typedef struct sysent {
218 const char *sys_name;
221 typedef struct ioctlent {
226 /* Trace Control Block */
228 int flags; /* See below for TCB_ values */
229 int pid; /* If 0, this tcb is free */
230 int qual_flg; /* qual_flags[scno] or DEFAULT_QUAL_FLAGS + RAW */
231 int u_error; /* Error code */
232 long scno; /* System call number */
233 long u_arg[MAX_ARGS]; /* System call arguments */
234 #if defined(LINUX_MIPSN32) || defined(X32)
235 long long ext_arg[MAX_ARGS];
236 long long u_lrval; /* long long return value */
238 long u_rval; /* Return value */
239 #if SUPPORTED_PERSONALITIES > 1
240 unsigned int currpers; /* Personality at the time of scno update */
242 int curcol; /* Output column for this process */
243 FILE *outf; /* Output file for this process */
244 const char *auxstr; /* Auxiliary info from syscall (see RVAL_STR) */
245 const struct_sysent *s_ent; /* sysent[scno] or dummy struct for bad scno */
246 struct timeval stime; /* System time usage as of last process wait */
247 struct timeval dtime; /* Delta for system time usage */
248 struct timeval etime; /* Syscall entry time */
249 /* Support for tracing forked processes: */
250 long inst[2]; /* Saved clone args (badly named) */
253 struct UPT_info* libunwind_ui;
254 struct mmap_cache_t* mmap_cache;
255 unsigned int mmap_cache_size;
256 unsigned int mmap_cache_generation;
257 struct queue_t* queue;
262 /* We have attached to this process, but did not see it stopping yet */
263 #define TCB_STARTUP 0x01
264 #define TCB_IGNORE_ONE_SIGSTOP 0x02 /* Next SIGSTOP is to be ignored */
266 * Are we in system call entry or in syscall exit?
268 * This bit is set after all syscall entry processing is done.
269 * Therefore, this bit will be set when next ptrace stop occurs,
270 * which should be syscall exit stop. Other stops which are possible
271 * directly after syscall entry (death, ptrace event stop)
272 * are simpler and handled without calling trace_syscall(), therefore
273 * the places where TCB_INSYSCALL can be set but we aren't in syscall stop
274 * are limited to trace(), this condition is never observed in trace_syscall()
276 * The bit is cleared after all syscall exit processing is done.
278 * Use entering(tcp) / exiting(tcp) to check this bit to make code more readable.
280 #define TCB_INSYSCALL 0x04
281 #define TCB_ATTACHED 0x08 /* We attached to it already */
282 #define TCB_REPRINT 0x10 /* We should reprint this syscall on exit */
283 #define TCB_FILTERED 0x20 /* This system call has been filtered out */
285 /* qualifier flags */
286 #define QUAL_TRACE 0x001 /* this system call should be traced */
287 #define QUAL_ABBREV 0x002 /* abbreviate the structures of this syscall */
288 #define QUAL_VERBOSE 0x004 /* decode the structures of this syscall */
289 #define QUAL_RAW 0x008 /* print all args in hex for this syscall */
290 #define QUAL_SIGNAL 0x010 /* report events with this signal */
291 #define QUAL_READ 0x020 /* dump data read on this file descriptor */
292 #define QUAL_WRITE 0x040 /* dump data written to this file descriptor */
293 typedef uint8_t qualbits_t;
294 #define UNDEFINED_SCNO 0x100 /* Used only in tcp->qual_flg */
296 #define DEFAULT_QUAL_FLAGS (QUAL_TRACE | QUAL_ABBREV | QUAL_VERBOSE)
298 #define entering(tcp) (!((tcp)->flags & TCB_INSYSCALL))
299 #define exiting(tcp) ((tcp)->flags & TCB_INSYSCALL)
300 #define syserror(tcp) ((tcp)->u_error != 0)
301 #define verbose(tcp) ((tcp)->qual_flg & QUAL_VERBOSE)
302 #define abbrev(tcp) ((tcp)->qual_flg & QUAL_ABBREV)
303 #define filtered(tcp) ((tcp)->flags & TCB_FILTERED)
309 #define XLAT(x) { x, #x }
310 #define XLAT_END { 0, NULL }
312 extern const struct xlat addrfams[];
313 extern const struct xlat at_flags[];
314 extern const struct xlat open_access_modes[];
315 extern const struct xlat open_mode_flags[];
316 extern const struct xlat whence_codes[];
318 /* Format of syscall return values */
319 #define RVAL_DECIMAL 000 /* decimal format */
320 #define RVAL_HEX 001 /* hex format */
321 #define RVAL_OCTAL 002 /* octal format */
322 #define RVAL_UDECIMAL 003 /* unsigned decimal format */
323 #if defined(LINUX_MIPSN32) || defined(X32)
324 # if 0 /* unused so far */
325 # define RVAL_LDECIMAL 004 /* long decimal format */
326 # define RVAL_LHEX 005 /* long hex format */
327 # define RVAL_LOCTAL 006 /* long octal format */
329 # define RVAL_LUDECIMAL 007 /* long unsigned decimal format */
331 #define RVAL_FD 010 /* file descriptor */
332 #define RVAL_MASK 017 /* mask for these values */
334 #define RVAL_STR 020 /* Print `auxstr' field after return val */
335 #define RVAL_NONE 040 /* Print nothing */
337 #define TRACE_FILE 001 /* Trace file-related syscalls. */
338 #define TRACE_IPC 002 /* Trace IPC-related syscalls. */
339 #define TRACE_NETWORK 004 /* Trace network-related syscalls. */
340 #define TRACE_PROCESS 010 /* Trace process-related syscalls. */
341 #define TRACE_SIGNAL 020 /* Trace signal-related syscalls. */
342 #define TRACE_DESC 040 /* Trace file descriptor-related syscalls. */
343 #define TRACE_MEMORY 0100 /* Trace memory mapping-related syscalls. */
344 #define SYSCALL_NEVER_FAILS 0200 /* Syscall is always successful. */
345 #define STACKTRACE_INVALIDATE_CACHE 0400 /* Trigger proc/maps cache updating */
346 #define STACKTRACE_CAPTURE_ON_ENTER 01000 /* Capture stacktrace on "entering" stage */
347 #define TRACE_INDIRECT_SUBCALL 02000 /* Syscall is an indirect socket/ipc subcall. */
349 #if defined(ARM) || defined(AARCH64) \
350 || defined(I386) || defined(X32) || defined(X86_64) \
354 || defined(MICROBLAZE) \
356 || defined(SH) || defined(SH64) \
357 || defined(SPARC) || defined(SPARC64) \
359 # define NEED_UID16_PARSERS 1
361 # define NEED_UID16_PARSERS 0
369 extern cflag_t cflag;
370 extern bool debug_flag;
373 extern bool count_wallclock;
374 extern unsigned int qflag;
375 extern bool not_failing_only;
376 extern unsigned int show_fd_path;
377 extern bool hide_log_until_execve;
378 /* are we filtering traces based on paths? */
379 extern const char **paths_selected;
380 #define tracing_paths (paths_selected != NULL)
381 extern unsigned xflag;
382 extern unsigned followfork;
384 /* if this is true do the stack trace for every system call */
385 extern bool stack_trace_enabled;
387 extern unsigned ptrace_setoptions;
388 extern unsigned max_strlen;
389 extern unsigned os_release;
390 #undef KERNEL_VERSION
391 #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
393 enum bitness_t { BITNESS_CURRENT = 0, BITNESS_32 };
395 void error_msg(const char *fmt, ...) __attribute__ ((format(printf, 1, 2)));
396 void perror_msg(const char *fmt, ...) __attribute__ ((format(printf, 1, 2)));
397 void error_msg_and_die(const char *fmt, ...) __attribute__ ((noreturn, format(printf, 1, 2)));
398 void perror_msg_and_die(const char *fmt, ...) __attribute__ ((noreturn, format(printf, 1, 2)));
399 void die_out_of_memory(void) __attribute__ ((noreturn));
401 #if USE_CUSTOM_PRINTF
403 * See comment in vsprintf.c for allowed formats.
404 * Short version: %h[h]u, %zu, %tu are not allowed, use %[l[l]]u.
406 int strace_vfprintf(FILE *fp, const char *fmt, va_list args);
408 # define strace_vfprintf vfprintf
411 extern void set_sortby(const char *);
412 extern void set_overhead(int);
413 extern void qualify(const char *);
414 extern void print_pc(struct tcb *);
415 extern int trace_syscall(struct tcb *);
416 extern void count_syscall(struct tcb *, const struct timeval *);
417 extern void call_summary(FILE *);
419 extern void clear_regs(void);
420 extern void get_regs(pid_t pid);
422 extern int umoven(struct tcb *, long, unsigned int, char *);
423 #define umove(pid, addr, objp) \
424 umoven((pid), (addr), sizeof(*(objp)), (char *) (objp))
425 extern int umovestr(struct tcb *, long, unsigned int, char *);
426 extern int upeek(int pid, long, long *);
427 #if defined(SPARC) || defined(SPARC64) || defined(IA64) || defined(SH)
428 extern long getrval2(struct tcb *);
431 extern const char *signame(const int);
432 extern void pathtrace_select(const char *);
433 extern int pathtrace_match(struct tcb *);
434 extern int getfdpath(struct tcb *, int, char *, unsigned);
436 extern const char *xlookup(const struct xlat *, const unsigned int);
437 extern const char *xlat_search(const struct xlat *, const size_t, const unsigned int);
439 extern int string_to_uint(const char *str);
440 extern int next_set_bit(const void *bit_array, unsigned cur_bit, unsigned size_bits);
442 #define QUOTE_0_TERMINATED 0x01
443 #define QUOTE_OMIT_LEADING_TRAILING_QUOTES 0x02
445 extern int print_quoted_string(const char *, unsigned int, unsigned int);
447 /* a refers to the lower numbered u_arg,
448 * b refers to the higher numbered u_arg
450 #if HAVE_LITTLE_ENDIAN_LONG_LONG
451 # define LONG_LONG(a,b) \
452 ((long long)((unsigned long long)(unsigned)(a) | ((unsigned long long)(b)<<32)))
454 # define LONG_LONG(a,b) \
455 ((long long)((unsigned long long)(unsigned)(b) | ((unsigned long long)(a)<<32)))
457 extern int getllval(struct tcb *, unsigned long long *, int);
458 extern int printllval(struct tcb *, const char *, int)
459 __attribute__ ((format (printf, 2, 0)));
461 extern void printxval(const struct xlat *, const unsigned int, const char *);
462 extern int printargs(struct tcb *);
463 extern int printargs_lu(struct tcb *);
464 extern int printargs_ld(struct tcb *);
465 extern void addflags(const struct xlat *, int);
466 extern int printflags(const struct xlat *, int, const char *);
467 extern const char *sprintflags(const char *, const struct xlat *, int);
468 extern const char *sprintmode(int);
469 extern const char *sprinttime(time_t);
470 extern void dumpiov_in_msghdr(struct tcb *, long);
471 extern void dumpiov_in_mmsghdr(struct tcb *, long);
472 extern void dumpiov(struct tcb *, int, long);
473 extern void dumpstr(struct tcb *, long, int);
474 extern void printstr(struct tcb *, long, long);
475 extern void printnum_int(struct tcb *, long, const char *)
476 __attribute__ ((format (printf, 3, 0)));
477 extern void printnum_long(struct tcb *, long, const char *)
478 __attribute__ ((format (printf, 3, 0)));
479 extern void printpath(struct tcb *, long);
480 extern void printpathn(struct tcb *, long, unsigned int);
481 #define TIMESPEC_TEXT_BUFSIZE (sizeof(long)*3 * 2 + sizeof("{%u, %u}"))
482 #define TIMEVAL_TEXT_BUFSIZE TIMESPEC_TEXT_BUFSIZE
483 extern void printtv_bitness(struct tcb *, long, enum bitness_t, int);
484 #define printtv(tcp, addr) \
485 printtv_bitness((tcp), (addr), BITNESS_CURRENT, 0)
486 #define printtv_special(tcp, addr) \
487 printtv_bitness((tcp), (addr), BITNESS_CURRENT, 1)
488 extern char *sprinttv(char *, struct tcb *, long, enum bitness_t, int special);
489 extern void print_timespec(struct tcb *, long);
490 extern void sprint_timespec(char *, struct tcb *, long);
491 extern void printsiginfo(const siginfo_t *, int);
492 extern void printsiginfo_at(struct tcb *tcp, long addr);
493 extern void printfd(struct tcb *, int);
494 extern bool print_sockaddr_by_inode(const unsigned long, const char *);
495 extern void print_dirfd(struct tcb *, int);
496 extern void printsock(struct tcb *, long, int);
497 extern void print_sock_optmgmt(struct tcb *, long, int);
498 extern void printrusage(struct tcb *, long);
500 extern void printrusage32(struct tcb *, long);
502 extern void printuid(const char *, const unsigned int);
503 extern void print_sigset_addr_len(struct tcb *, long, long);
504 extern void printsignal(int);
505 extern void tprint_iov(struct tcb *, unsigned long, unsigned long, int decode_iov);
506 extern void tprint_iov_upto(struct tcb *, unsigned long, unsigned long, int decode_iov, unsigned long);
507 extern void tprint_open_modes(int);
508 extern const char *sprint_open_modes(int);
509 extern void print_loff_t(struct tcb *, long);
510 extern void print_seccomp_filter(struct tcb *tcp, unsigned long);
512 extern const struct_ioctlent *ioctl_lookup(const unsigned int);
513 extern const struct_ioctlent *ioctl_next_match(const struct_ioctlent *);
514 extern void ioctl_print_code(const unsigned int);
515 extern int ioctl_decode(struct tcb *, const unsigned int, long);
516 extern int ioctl_decode_command_number(const unsigned int);
517 extern int block_ioctl(struct tcb *, const unsigned int, long);
518 extern int evdev_ioctl(struct tcb *, const unsigned int, long);
519 extern int loop_ioctl(struct tcb *, const unsigned int, long);
520 extern int mtd_ioctl(struct tcb *, const unsigned int, long);
521 extern int ptp_ioctl(struct tcb *, const unsigned int, long);
522 extern int rtc_ioctl(struct tcb *, const unsigned int, long);
523 extern int scsi_ioctl(struct tcb *, const unsigned int, long);
524 extern int sock_ioctl(struct tcb *, const unsigned int, long);
525 extern int term_ioctl(struct tcb *, const unsigned int, long);
526 extern int ubi_ioctl(struct tcb *, const unsigned int, long);
527 extern int v4l2_ioctl(struct tcb *, const unsigned int, long);
529 extern int tv_nz(const struct timeval *);
530 extern int tv_cmp(const struct timeval *, const struct timeval *);
531 extern double tv_float(const struct timeval *);
532 extern void tv_add(struct timeval *, const struct timeval *, const struct timeval *);
533 extern void tv_sub(struct timeval *, const struct timeval *, const struct timeval *);
534 extern void tv_mul(struct timeval *, const struct timeval *, int);
535 extern void tv_div(struct timeval *, const struct timeval *, int);
538 extern void unwind_init(void);
539 extern void unwind_tcb_init(struct tcb *tcp);
540 extern void unwind_tcb_fin(struct tcb *tcp);
541 extern void unwind_cache_invalidate(struct tcb* tcp);
542 extern void unwind_print_stacktrace(struct tcb* tcp);
543 extern void unwind_capture_stacktrace(struct tcb* tcp);
546 /* Strace log generation machinery.
548 * printing_tcp: tcb which has incomplete line being printed right now.
549 * NULL if last line has been completed ('\n'-terminated).
550 * printleader(tcp) examines it, finishes incomplete line if needed,
551 * the sets it to tcp.
552 * line_ended() clears printing_tcp and resets ->curcol = 0.
553 * tcp->curcol == 0 check is also used to detect completeness
554 * of last line, since in -ff mode just checking printing_tcp for NULL
557 * If you change this code, test log generation in both -f and -ff modes
559 * strace -oLOG -f[f] test/threaded_execve
560 * strace -oLOG -f[f] test/sigkill_rain
561 * strace -oLOG -f[f] -p "`pidof web_browser`"
563 extern struct tcb *printing_tcp;
564 extern void printleader(struct tcb *);
565 extern void line_ended(void);
566 extern void tabto(void);
567 extern void tprintf(const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
568 extern void tprints(const char *str);
570 #if SUPPORTED_PERSONALITIES > 1
571 extern void set_personality(int personality);
572 extern unsigned current_personality;
574 # define set_personality(personality) ((void)0)
575 # define current_personality 0
578 #if SUPPORTED_PERSONALITIES == 1
579 # define current_wordsize PERSONALITY0_WORDSIZE
581 # if SUPPORTED_PERSONALITIES == 2 && PERSONALITY0_WORDSIZE == PERSONALITY1_WORDSIZE
582 # define current_wordsize PERSONALITY0_WORDSIZE
584 extern unsigned current_wordsize;
588 /* In many, many places we play fast and loose and use
589 * tprintf("%d", (int) tcp->u_arg[N]) to print fds, pids etc.
590 * We probably need to use widen_to_long() instead:
592 #if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
593 # define widen_to_long(v) (current_wordsize == 4 ? (long)(int32_t)(v) : (long)(v))
595 # define widen_to_long(v) ((long)(v))
598 extern const struct_sysent sysent0[];
599 extern const char *const errnoent0[];
600 extern const char *const signalent0[];
601 extern const struct_ioctlent ioctlent0[];
602 extern qualbits_t *qual_vec[SUPPORTED_PERSONALITIES];
603 #define qual_flags (qual_vec[current_personality])
604 #if SUPPORTED_PERSONALITIES > 1
605 extern const struct_sysent *sysent;
606 extern const char *const *errnoent;
607 extern const char *const *signalent;
608 extern const struct_ioctlent *ioctlent;
610 # define sysent sysent0
611 # define errnoent errnoent0
612 # define signalent signalent0
613 # define ioctlent ioctlent0
615 extern unsigned nsyscalls;
616 extern unsigned nerrnos;
617 extern unsigned nsignals;
618 extern unsigned nioctlents;
619 extern unsigned num_quals;
622 * If you need non-NULL sysent[scno].sys_func and sysent[scno].sys_name
624 #define SCNO_IS_VALID(scno) \
625 ((unsigned long)(scno) < nsyscalls && sysent[scno].sys_func)
627 /* Only ensures that sysent[scno] isn't out of range */
628 #define SCNO_IN_RANGE(scno) \
629 ((unsigned long)(scno) < nsyscalls)