| 1 | #include <stdlib.h> |
| 2 | #include <stdio.h> |
| 3 | #include <unistd.h> |
| 4 | #include <errno.h> |
| 5 | #include <ctype.h> |
| 6 | #include <dirent.h> |
| 7 | #include <fcntl.h> |
| 8 | #include <string.h> |
| 9 | |
| 10 | int isnumeric(char *str) |
| 11 | { |
| 12 | while(*str) { |
| 13 | if(!isdigit(*str)) |
| 14 | return(0); |
| 15 | str++; |
| 16 | } |
| 17 | return(1); |
| 18 | } |
| 19 | |
| 20 | char *findcc(int fd) |
| 21 | { |
| 22 | int ret, dlen; |
| 23 | static char retbuf[1024]; |
| 24 | char readbuf[1024]; |
| 25 | char *p, *p2; |
| 26 | |
| 27 | dlen = 0; |
| 28 | p = readbuf; |
| 29 | do { |
| 30 | if(dlen == 1024) |
| 31 | dlen = 0; |
| 32 | ret = read(fd, readbuf + dlen, sizeof(readbuf) - dlen); |
| 33 | if(ret < 0) { |
| 34 | perror("read environ"); |
| 35 | return(NULL); |
| 36 | } |
| 37 | dlen += ret; |
| 38 | |
| 39 | while((p = memchr(readbuf, 0, dlen)) != NULL) { |
| 40 | if((p2 = strchr(readbuf, '=')) != NULL) { |
| 41 | *(p2++) = 0; |
| 42 | if(!strcasecmp(readbuf, "KRB5CCNAME") && !strncasecmp(p2, "FILE:", 5)) { |
| 43 | if(strlen(p2 + 5) >= sizeof(retbuf)) { |
| 44 | fprintf(stderr, "really long ccname!\n"); |
| 45 | return(NULL); |
| 46 | } |
| 47 | strcpy(retbuf, p2 + 5); |
| 48 | return(retbuf); |
| 49 | } |
| 50 | } |
| 51 | p++; |
| 52 | memmove(readbuf, p, dlen -= (p - readbuf)); |
| 53 | } |
| 54 | } while(ret != 0); |
| 55 | return(NULL); |
| 56 | } |
| 57 | |
| 58 | int main(int argc, char **argv) |
| 59 | { |
| 60 | int fd; |
| 61 | DIR *proc; |
| 62 | struct dirent *de; |
| 63 | char envbuf[1024]; |
| 64 | char *p, *cc; |
| 65 | |
| 66 | if((proc = opendir("/proc")) == NULL) { |
| 67 | perror("/proc"); |
| 68 | exit(1); |
| 69 | } |
| 70 | while((de = readdir(proc)) != NULL) { |
| 71 | if(!isnumeric(de->d_name)) |
| 72 | continue; |
| 73 | if(strlen(de->d_name) > 30) |
| 74 | continue; |
| 75 | |
| 76 | p = envbuf; |
| 77 | strcpy(p, "/proc/"); |
| 78 | p += 6; |
| 79 | strcpy(p, de->d_name); |
| 80 | p += strlen(de->d_name); |
| 81 | *(p++) = '/'; |
| 82 | strcpy(p, "environ"); |
| 83 | |
| 84 | if((fd = open(envbuf, O_RDONLY)) < 0) |
| 85 | continue; |
| 86 | cc = findcc(fd); |
| 87 | close(fd); |
| 88 | |
| 89 | if(cc != NULL) { |
| 90 | printf("%s %s\n", de->d_name, cc); |
| 91 | } |
| 92 | } |
| 93 | closedir(proc); |
| 94 | return(0); |
| 95 | } |