| 1 | #include <errno.h> |
| 2 | #include <stdio.h> |
| 3 | #include <stdlib.h> |
| 4 | #include <string.h> |
| 5 | #include <unistd.h> |
| 6 | #include <sys/types.h> |
| 7 | #include <sys/stat.h> |
| 8 | #include <fcntl.h> |
| 9 | #include "mdup.h" |
| 10 | |
| 11 | #define MAXFD 256 |
| 12 | |
| 13 | static void fail(const char *what) { perror(what); exit(1); } |
| 14 | |
| 15 | int main(int argc, char *argv[]) |
| 16 | { |
| 17 | int i, n; |
| 18 | int fd, fd2; |
| 19 | struct stat st; |
| 20 | int ino[MAXFD]; |
| 21 | int flag[MAXFD]; |
| 22 | mdup_fd fds[MAXFD]; |
| 23 | int win = 1; |
| 24 | |
| 25 | for (i = 0; i < argc - 1; i++) { |
| 26 | if (i >= MAXFD) { |
| 27 | fprintf(stderr, "too many\n"); |
| 28 | exit(1); |
| 29 | } |
| 30 | if (sscanf(argv[i + 1], "%d:%d", &fds[i].cur, &fds[i].want) < 2 || |
| 31 | fds[i].cur >= MAXFD) { |
| 32 | fprintf(stderr, "bad syntax\n"); |
| 33 | exit(1); |
| 34 | } |
| 35 | } |
| 36 | n = argc - 1; |
| 37 | for (i = 0; i < MAXFD; i++) flag[i] = -1; |
| 38 | for (i = 0; i < n; i++) { |
| 39 | fd = fds[i].cur; |
| 40 | if (flag[fd] >= 0) |
| 41 | ino[i] = ino[flag[fd]]; |
| 42 | else { |
| 43 | flag[fd] = i; |
| 44 | if ((fd2 = open(",delete-me", |
| 45 | O_WRONLY | O_CREAT | O_EXCL, |
| 46 | 0700)) < 0) |
| 47 | fail("creat"); |
| 48 | unlink(",delete-me"); |
| 49 | if (fd2 != fd) { |
| 50 | if (dup2(fd2, fd) < 0) fail("dup2"); |
| 51 | close(fd2); |
| 52 | } |
| 53 | if (fstat(fd, &st)) fail("fstat"); |
| 54 | ino[i] = st.st_ino; |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | if (mdup(fds, n)) fail("mdup"); |
| 59 | |
| 60 | for (i = 0; i < n; i++) { |
| 61 | fd = fds[i].cur; |
| 62 | if (fds[i].want != -1 && fds[i].want != fd) { |
| 63 | printf("fd %d[%d] != %d\n", fd, i, fds[i].want); |
| 64 | win = 0; |
| 65 | } else if (fstat(fd, &st)) { |
| 66 | printf("fstat %d[%d] failed: %s\n", fd, i, strerror(errno)); |
| 67 | win = 0; |
| 68 | } else if (st.st_ino != ino[i]) { |
| 69 | printf("ino %d[%d] wrong\n", fd, i); |
| 70 | win = 0; |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | return (!win); |
| 75 | } |