xref: /aosp_15_r20/external/linux-kselftest/tools/testing/selftests/proc/proc.h (revision 053f45be4e351dfd5e965df293cd45b779f579ee)
1*053f45beSAndroid Build Coastguard Worker #pragma once
2*053f45beSAndroid Build Coastguard Worker #undef NDEBUG
3*053f45beSAndroid Build Coastguard Worker #include <assert.h>
4*053f45beSAndroid Build Coastguard Worker #include <dirent.h>
5*053f45beSAndroid Build Coastguard Worker #include <errno.h>
6*053f45beSAndroid Build Coastguard Worker #include <stdbool.h>
7*053f45beSAndroid Build Coastguard Worker #include <stdlib.h>
8*053f45beSAndroid Build Coastguard Worker #include <string.h>
9*053f45beSAndroid Build Coastguard Worker #include <unistd.h>
10*053f45beSAndroid Build Coastguard Worker #include <sys/syscall.h>
11*053f45beSAndroid Build Coastguard Worker 
sys_getpid(void)12*053f45beSAndroid Build Coastguard Worker static inline pid_t sys_getpid(void)
13*053f45beSAndroid Build Coastguard Worker {
14*053f45beSAndroid Build Coastguard Worker 	return syscall(SYS_getpid);
15*053f45beSAndroid Build Coastguard Worker }
16*053f45beSAndroid Build Coastguard Worker 
sys_gettid(void)17*053f45beSAndroid Build Coastguard Worker static inline pid_t sys_gettid(void)
18*053f45beSAndroid Build Coastguard Worker {
19*053f45beSAndroid Build Coastguard Worker 	return syscall(SYS_gettid);
20*053f45beSAndroid Build Coastguard Worker }
21*053f45beSAndroid Build Coastguard Worker 
streq(const char * s1,const char * s2)22*053f45beSAndroid Build Coastguard Worker static inline bool streq(const char *s1, const char *s2)
23*053f45beSAndroid Build Coastguard Worker {
24*053f45beSAndroid Build Coastguard Worker 	return strcmp(s1, s2) == 0;
25*053f45beSAndroid Build Coastguard Worker }
26*053f45beSAndroid Build Coastguard Worker 
xstrtoull(const char * p,char ** end)27*053f45beSAndroid Build Coastguard Worker static unsigned long long xstrtoull(const char *p, char **end)
28*053f45beSAndroid Build Coastguard Worker {
29*053f45beSAndroid Build Coastguard Worker 	if (*p == '0') {
30*053f45beSAndroid Build Coastguard Worker 		*end = (char *)p + 1;
31*053f45beSAndroid Build Coastguard Worker 		return 0;
32*053f45beSAndroid Build Coastguard Worker 	} else if ('1' <= *p && *p <= '9') {
33*053f45beSAndroid Build Coastguard Worker 		unsigned long long val;
34*053f45beSAndroid Build Coastguard Worker 
35*053f45beSAndroid Build Coastguard Worker 		errno = 0;
36*053f45beSAndroid Build Coastguard Worker 		val = strtoull(p, end, 10);
37*053f45beSAndroid Build Coastguard Worker 		assert(errno == 0);
38*053f45beSAndroid Build Coastguard Worker 		return val;
39*053f45beSAndroid Build Coastguard Worker 	} else
40*053f45beSAndroid Build Coastguard Worker 		assert(0);
41*053f45beSAndroid Build Coastguard Worker }
42*053f45beSAndroid Build Coastguard Worker 
xreaddir(DIR * d)43*053f45beSAndroid Build Coastguard Worker static struct dirent *xreaddir(DIR *d)
44*053f45beSAndroid Build Coastguard Worker {
45*053f45beSAndroid Build Coastguard Worker 	struct dirent *de;
46*053f45beSAndroid Build Coastguard Worker 
47*053f45beSAndroid Build Coastguard Worker 	errno = 0;
48*053f45beSAndroid Build Coastguard Worker 	de = readdir(d);
49*053f45beSAndroid Build Coastguard Worker 	assert(de || errno == 0);
50*053f45beSAndroid Build Coastguard Worker 	return de;
51*053f45beSAndroid Build Coastguard Worker }
52