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| author | Eric Andersen <andersen@codepoet.org> | 2001-02-24 19:17:07 +0000 |
|---|---|---|
| committer | Eric Andersen <andersen@codepoet.org> | 2001-02-24 19:17:07 +0000 |
| commit | d160a27ec15b9304e6576616639f0f347022a258 (patch) | |
| tree | 1732d8e76fe36c67099357c3076ceb5cc60ac084 /util-linux/pivot_root.c | |
| parent | dc12190ba258dcaa3b5758fabf0e92f8e8380b26 (diff) | |
| download | busybox-w32-d160a27ec15b9304e6576616639f0f347022a258.tar.gz busybox-w32-d160a27ec15b9304e6576616639f0f347022a258.tar.bz2 busybox-w32-d160a27ec15b9304e6576616639f0f347022a258.zip | |
Stub out the syscall, not the whole application. The stubbed
out syscall sets errno properly and whines about missing kernel
support.
-Erik
Diffstat (limited to 'util-linux/pivot_root.c')
| -rw-r--r-- | util-linux/pivot_root.c | 26 |
1 files changed, 18 insertions, 8 deletions
diff --git a/util-linux/pivot_root.c b/util-linux/pivot_root.c index d34dcd7cc..4d7f8a3d1 100644 --- a/util-linux/pivot_root.c +++ b/util-linux/pivot_root.c | |||
| @@ -3,24 +3,35 @@ | |||
| 3 | * pivot_root.c - Change root file system. Based on util-linux 2.10s | 3 | * pivot_root.c - Change root file system. Based on util-linux 2.10s |
| 4 | * | 4 | * |
| 5 | * busyboxed by Evin Robertson | 5 | * busyboxed by Evin Robertson |
| 6 | * pivot_root syscall stubbed by Erik Andersen, so it will compile | ||
| 7 | * regardless of the kernel being used. | ||
| 6 | */ | 8 | */ |
| 7 | #include <stdlib.h> | 9 | #include <stdlib.h> |
| 8 | #include <stdio.h> | 10 | #include <stdio.h> |
| 11 | #include <errno.h> | ||
| 9 | #include <sys/syscall.h> | 12 | #include <sys/syscall.h> |
| 10 | #include <linux/unistd.h> | 13 | #include <linux/unistd.h> |
| 11 | #include "busybox.h" | 14 | #include "busybox.h" |
| 12 | 15 | ||
| 13 | #ifndef __NR_pivot_root | 16 | #ifndef __NR_pivot_root |
| 14 | #warning This kernel does not support the pivot_root syscall | 17 | #warning This kernel does not support the pivot_root syscall |
| 15 | #warning The pivot_root application is being stubbed out... | 18 | #warning The pivot_root system call is being stubbed out... |
| 16 | int pivot_root_main(int argc, char **argv) | 19 | int pivot_root(const char * new_root,const char * put_old) |
| 17 | { | 20 | { |
| 18 | printf("Please recompile with a kernel supporting the pivot_root syscall.\n"); | 21 | /* BusyBox was compiled against a kernel that did not support |
| 19 | return 0; | 22 | * the pivot_root system call. To make this application work, |
| 23 | * you will need to recompile with a kernel supporting the | ||
| 24 | * pivot_root system call. | ||
| 25 | */ | ||
| 26 | fprintf(stderr, "\n\nTo make this application work, you will need to recompile\n"); | ||
| 27 | fprintf(stderr, "with a kernel supporting the pivot_root system call. -Erik\n\n"); | ||
| 28 | errno=ENOSYS; | ||
| 29 | return -1; | ||
| 20 | } | 30 | } |
| 21 | #else | 31 | #else |
| 22 | |||
| 23 | static _syscall2(int,pivot_root,const char *,new_root,const char *,put_old) | 32 | static _syscall2(int,pivot_root,const char *,new_root,const char *,put_old) |
| 33 | #endif | ||
| 34 | |||
| 24 | 35 | ||
| 25 | 36 | ||
| 26 | int pivot_root_main(int argc, char **argv) | 37 | int pivot_root_main(int argc, char **argv) |
| @@ -28,13 +39,12 @@ int pivot_root_main(int argc, char **argv) | |||
| 28 | if (argc != 3) | 39 | if (argc != 3) |
| 29 | show_usage(); | 40 | show_usage(); |
| 30 | 41 | ||
| 31 | if (pivot_root(argv[1],argv[2]) < 0) | 42 | if (pivot_root(argv[1],argv[2]) < 0) |
| 32 | perror_msg_and_die("pivot_root"); | 43 | perror_msg_and_die("pivot_root"); |
| 33 | 44 | ||
| 34 | return EXIT_SUCCESS; | 45 | return EXIT_SUCCESS; |
| 35 | 46 | ||
| 36 | } | 47 | } |
| 37 | #endif | ||
| 38 | 48 | ||
| 39 | 49 | ||
| 40 | /* | 50 | /* |