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-rw-r--r--df.c103
1 files changed, 103 insertions, 0 deletions
diff --git a/df.c b/df.c
new file mode 100644
index 0000000..a0692af
--- /dev/null
+++ b/df.c
@@ -0,0 +1,103 @@
+#include "internal.h"
+#include <stdio.h>
+#include <mntent.h>
+#include <sys/stat.h>
+#include <sys/vfs.h>
+
+const char df_usage[] = "df [filesystem ...]\n"
+"\n"
+"\tPrint the filesystem space used and space available.\n";
+
+
+static int
+df(const char * device, const char * mountPoint)
+{
+ struct statfs s;
+ long blocks_used;
+ long blocks_percent_used;
+
+ if ( statfs(mountPoint, &s) != 0 ) {
+ name_and_error(mountPoint);
+ return 1;
+ }
+
+ if ( s.f_blocks > 0 ) {
+ blocks_used = s.f_blocks - s.f_bfree;
+ blocks_percent_used = (long)
+ (blocks_used * 100.0 / (blocks_used + s.f_bavail) + 0.5);
+
+/*
+ printf(
+ "%-20s %7ld %7ld %7ld %5ld%% %s\n"
+ ,device
+ ,s.f_blocks
+ ,s.f_blocks - s.f_bfree
+ ,s.f_bavail
+ ,blocks_percent_used
+ ,mountPoint);
+*/
+
+ printf(
+ "%-20s %7.0f %7.0f %7.0f %5ld%% %s\n"
+ ,device
+ ,s.f_blocks * (s.f_bsize / 1024.0)
+ ,(s.f_blocks - s.f_bfree) * (s.f_bsize / 1024.0)
+ ,s.f_bavail * (s.f_bsize / 1024.0)
+ ,blocks_percent_used
+ ,mountPoint);
+
+ }
+
+ return 0;
+}
+
+extern int
+df_main(struct FileInfo * i, int argc, char * * argv)
+{
+ static const char header[] =
+ "Filesystem 1024-blocks Used Available Capacity Mounted on\n";
+ printf(header);
+
+ if ( argc > 1 ) {
+ struct mntent * mountEntry;
+ int status;
+
+ while ( argc > 1 ) {
+ if ( (mountEntry = findMountPoint(argv[1], "/etc/mtab")) == 0
+ && (mountEntry = findMountPoint(argv[1], "/proc/mounts")) == 0 )
+ {
+ fprintf(stderr, "%s: can't find mount point.\n"
+ ,argv[1]);
+ return 1;
+ }
+ status = df(mountEntry->mnt_fsname, mountEntry->mnt_dir);
+ if ( status != 0 )
+ return status;
+ argc--;
+ argv++;
+ }
+ return 0;
+ }
+ else {
+ FILE * mountTable;
+ struct mntent * mountEntry;
+
+ if ( (mountTable = setmntent("/etc/mtab", "r")) == 0
+ && (mountTable = setmntent("/proc/mounts", "r")) == 0
+ ) {
+ name_and_error("/etc/mtab");
+ return 1;
+ }
+
+ while ( (mountEntry = getmntent(mountTable)) != 0 ) {
+ int status = df(
+ mountEntry->mnt_fsname
+ ,mountEntry->mnt_dir);
+ if ( status != 0 )
+ return status;
+ }
+ endmntent(mountTable);
+ }
+
+ return 0;
+}