1 #include <fcntl.h> 2 #include <stdio.h> 3 4 int main(int argc, char *argv[]) 5 { 6 int pid = atoi(argv[1]); 7 int sfd; 8 char sname[32]; 9 char buf[1024]; 10 char *s; 11 int i; 12 int signal, blocked, ignore, caught; 13 14 sprintf(sname, "/proc/%d/stat", pid); 15 16 sfd = open(sname, O_RDONLY); 17 if (sfd == -1) { 18 perror(sname); 19 return 1; 20 } 21 22 i = read(sfd, buf, 1024); 23 buf[i] = '\0'; 24 25 for (i = 0, s = buf; i < 30; i++) { 26 while (*++s != ' ') { 27 if (!*s) 28 break; 29 } 30 } 31 32 if (sscanf(s, "%d%d%d%d", &signal, &blocked, &ignore, &caught) != 4) { 33 fprintf(stderr, "/proc/pid/stat format error\n"); 34 return 1; 35 } 36 37 printf("%8x %8x %8x %8x\n", signal, blocked, ignore, caught); 38 39 return 0; 40 } 41
