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| author | Bernhard Reutner-Fischer | 2006-03-18 23:02:45 +0000 |
|---|---|---|
| committer | Bernhard Reutner-Fischer | 2006-03-18 23:02:45 +0000 |
| commit | 2523da259ce69cc3da5d7c02d2f8301f4de5408b (patch) | |
| tree | 4c0c1f4bc2a56dfbdcd5f917e6d82b74843d9c93 | |
| parent | 66753a38509423fd81d85c61fd0401370353386d (diff) | |
| download | busybox-2523da259ce69cc3da5d7c02d2f8301f4de5408b.zip busybox-2523da259ce69cc3da5d7c02d2f8301f4de5408b.tar.gz | |
- explain what magic numbers we're using here.
| -rw-r--r-- | util-linux/freeramdisk.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/util-linux/freeramdisk.c b/util-linux/freeramdisk.c index 923a151..1f010c7 100644 --- a/util-linux/freeramdisk.c +++ b/util-linux/freeramdisk.c @@ -18,6 +18,11 @@ #include <unistd.h> #include "busybox.h" +/* From linux/fs.h */ +#define BLKFLSBUF _IO(0x12,97) +/* From <linux/fd.h> */ +#define FDFLUSH _IO(2,0x4b) + int freeramdisk_main(int argc, char **argv) { int result; @@ -29,7 +34,7 @@ int freeramdisk_main(int argc, char **argv) // Act like freeramdisk, fdflush, or both depending on configuration. result = ioctl(fd, (ENABLE_FREERAMDISK && bb_applet_name[1]=='r') - || !ENABLE_FDFLUSH ? _IO(0x12,97) : _IO(2,0x4b)); + || !ENABLE_FDFLUSH ? BLKFLSBUF : FDFLUSH); if (ENABLE_FEATURE_CLEAN_UP) close(fd); |