How to find the system call number
You can easily identify it using the command ausyscall.
usage
root@choco002:~# ausyscall
usage: ausyscall [arch] name | number | --dump | --exact
root@choco002:~# ausyscall --dump
Using x86_64 syscall table:
0 read
1 write
2 open
3 close
4 stat
5 fstat
6 lstat
7 poll
8 lseek
9 mmap
10 mprotect
11 munmap
12 brk
13 rt_sigaction
14 rt_sigprocmask
15 rt_sigreturn
16 ioctl
17 pread
18 pwrite
19 readv
20 writev
21 access
22 pipe
23 select
24 sched_yield
25 mremap
26 msync
27 mincore
28 madvise
29 shmget
30 shmat
31 shmctl
32 dup
33 dup2
34 pause
35 nanosleep
36 getitimer
37 alarm
38 setitimer
39 getpid
40 sendfile
41 socket
42 connect
43 accept
44 sendto
45 recvfrom
46 sendmsg
47 recvmsg
48 shutdown
49 bind
50 listen
51 getsockname
52 getpeername
53 socketpair
54 setsockopt
55 getsockopt
56 clone
57 fork
58 vfork
59 execve
60 exit
61 wait4
62 kill
63 uname
64 semget
65 semop
66 semctl
67 shmdt
68 msgget
69 msgsnd
70 msgrcv
71 msgctl
72 fcntl
73 flock
74 fsync
75 fdatasync
76 truncate
77 ftruncate
78 getdents
79 getcwd
80 chdir
81 fchdir
82 rename
83 mkdir
84 rmdir
85 creat
86 link
87 unlink
88 symlink
89 readlink
90 chmod
91 fchmod
92 chown
93 fchown
94 lchown
95 umask
96 gettimeofday
97 getrlimit
98 getrusage
99 sysinfo
100 times
101 ptrace
102 getuid
103 syslog
104 getgid
105 setuid
106 setgid
107 geteuid
108 getegid
109 setpgid
110 getppid
111 getpgrp
112 setsid
113 setreuid
114 setregid
115 getgroups
116 setgroups
117 setresuid
118 getresuid
119 setresgid
120 getresgid
121 getpgid
122 setfsuid
123 setfsgid
124 getsid
125 capget
126 capset
127 rt_sigpending
128 rt_sigtimedwait
129 rt_sigqueueinfo
130 rt_sigsuspend
131 sigaltstack
132 utime
133 mknod
134 uselib
135 personality
136 ustat
137 statfs
138 fstatfs
139 sysfs
140 getpriority
141 setpriority
142 sched_setparam
143 sched_getparam
144 sched_setscheduler
145 sched_getscheduler
146 sched_get_priority_max
147 sched_get_priority_min
148 sched_rr_get_interval
149 mlock
150 munlock
151 mlockall
152 munlockall
153 vhangup
154 modify_ldt
155 pivot_root
156 _sysctl
157 prctl
158 arch_prctl
159 adjtimex
160 setrlimit
161 chroot
162 sync
163 acct
164 settimeofday
165 mount
166 umount2
167 swapon
168 swapoff
169 reboot
170 sethostname
171 setdomainname
172 iopl
173 ioperm
174 create_module
175 init_module
176 delete_module
177 get_kernel_syms
178 query_module
179 quotactl
180 nfsservctl
181 getpmsg
182 putpmsg
183 afs_syscall
184 tuxcall
185 security
186 gettid
187 readahead
188 setxattr
189 lsetxattr
190 fsetxattr
191 getxattr
192 lgetxattr
193 fgetxattr
194 listxattr
195 llistxattr
196 flistxattr
197 removexattr
198 lremovexattr
199 fremovexattr
200 tkill
201 time
202 futex
203 sched_setaffinity
204 sched_getaffinity
205 set_thread_area
206 io_setup
207 io_destroy
208 io_getevents
209 io_submit
210 io_cancel
211 get_thread_area
212 lookup_dcookie
213 epoll_create
214 epoll_ctl_old
215 epoll_wait_old
216 remap_file_pages
217 getdents64
218 set_tid_address
219 restart_syscall
220 semtimedop
221 fadvise64
222 timer_create
223 timer_settime
224 timer_gettime
225 timer_getoverrun
226 timer_delete
227 clock_settime
228 clock_gettime
229 clock_getres
230 clock_nanosleep
231 exit_group
232 epoll_wait
233 epoll_ctl
234 tgkill
235 utimes
236 vserver
237 mbind
238 set_mempolicy
239 get_mempolicy
240 mq_open
241 mq_unlink
242 mq_timedsend
243 mq_timedreceive
244 mq_notify
245 mq_getsetattr
246 kexec_load
247 waitid
248 add_key
249 request_key
250 keyctl
251 ioprio_set
252 ioprio_get
253 inotify_init
254 inotify_add_watch
255 inotify_rm_watch
256 migrate_pages
257 openat
258 mkdirat
259 mknodat
260 fchownat
261 futimesat
262 newfstatat
263 unlinkat
264 renameat
265 linkat
266 symlinkat
267 readlinkat
268 fchmodat
269 faccessat
270 pselect6
271 ppoll
272 unshare
273 set_robust_list
274 get_robust_list
275 splice
276 tee
277 sync_file_range
278 vmsplice
279 move_pages
280 utimensat
281 epoll_pwait
282 signalfd
283 timerfd_create
284 eventfd
285 fallocate
286 timerfd_settime
287 timerfd_gettime
288 accept4
289 signalfd4
290 eventfd2
291 epoll_create1
292 dup3
293 pipe2
294 inotify_init1
295 preadv
296 pwritev
297 rt_tgsigqueueinfo
298 perf_event_open
299 recvmmsg
300 fanotify_init
301 fanotify_mark
302 prlimit64
303 name_to_handle_at
304 open_by_handle_at
305 clock_adjtime
306 syncfs
307 sendmmsg
308 setns
309 getcpu
310 process_vm_readv
311 process_vm_writev
312 kcmp
313 finit_module
314 sched_setattr
315 sched_getattr
316 renameat2
317 seccomp
318 getrandom
319 memfd_create
320 kexec_file_load
321 bpf
322 execveat
323 userfaultfd
324 membarrier
325 mlock2
326 copy_file_range
327 preadv2
328 pwritev2
329 pkey_mprotect
330 pkey_alloc
331 pkey_free
332 statx
333 io_pgetevents
334 rseq
It's possible to specify the architecture, but is there a chance to see something other than x86_64. If you don't know the architecture, you can check the architecture of the machine you are currently using by typing uname -m.
ausyscall(8) - Linux man page ausyscall - Unix, Linux Command
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