1 /* 2 * Reads /proc/self/psinfo such that it can be tested whether Valgrind 3 * intercepts the system calls that access this pseudo-file. 4 */ 5 6 #include <fcntl.h> 7 #include <limits.h> 8 #include <procfs.h> 9 #include <stdio.h> 10 #include <unistd.h> 11 12 static void test_psinfo(int op, const char *label, 13 const char *path) 14 { 15 int fd; 16 if (op == 0) { 17 printf("open for %s:\n", label); 18 19 fd = open(path, O_RDONLY); 20 if (fd < 0) { 21 perror("open"); 22 return; 23 } 24 } else { 25 printf("openat for %s:\n", label); 26 27 fd = openat(AT_FDCWD, path, O_RDONLY); 28 if (fd < 0) { 29 perror("openat"); 30 return; 31 } 32 } 33 34 psinfo_t psinfo; 35 ssize_t bytes = read(fd, &psinfo, sizeof(psinfo)); 36 if (bytes != sizeof(psinfo)) { 37 perror("read"); 38 return; 39 } 40 41 printf("fname: %s\n", psinfo.pr_fname); 42 printf("psargs: %s\n", psinfo.pr_psargs); 43 44 printf("argc: %d\n", psinfo.pr_argc); 45 unsigned int i; 46 char **argv = (char **) psinfo.pr_argv; 47 for (i = 0; i < psinfo.pr_argc; i++) { 48 printf("argv[%u]: %s\n", i, argv[i]); 49 } 50 51 close(fd); 52 } 53 54 int main(int argc, const char *argv[]) 55 { 56 char path[PATH_MAX]; 57 snprintf(path, sizeof(path), "/proc/%ld/psinfo", (long int) getpid()); 58 59 test_psinfo(0, "/proc/self/psinfo", "/proc/self/psinfo"); 60 printf("\n"); 61 test_psinfo(0, "/proc/<pid>/psinfo", path); 62 printf("\n"); 63 64 test_psinfo(1, "/proc/self/psinfo", "/proc/self/psinfo"); 65 printf("\n"); 66 test_psinfo(1, "/proc/<pid>/psinfo", path); 67 68 return 0; 69 } 70
