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authorEric Andersen1999-10-06 20:25:32 +0000
committerEric Andersen1999-10-06 20:25:32 +0000
commit17d49efd8ce6507152d78a70574193bb1b313af6 (patch)
tree64e24302dc2575867d8a78897500e5a5b2a48398 /df.c
parent9d3aba7b37b275350a9fe0887871da9ba73dcbd7 (diff)
downloadbusybox-17d49efd8ce6507152d78a70574193bb1b313af6.zip
busybox-17d49efd8ce6507152d78a70574193bb1b313af6.tar.gz
More stuff.
Diffstat (limited to 'df.c')
-rw-r--r--df.c61
1 files changed, 51 insertions, 10 deletions
diff --git a/df.c b/df.c
index a0692af..bbda694 100644
--- a/df.c
+++ b/df.c
@@ -17,7 +17,7 @@ df(const char * device, const char * mountPoint)
long blocks_percent_used;
if ( statfs(mountPoint, &s) != 0 ) {
- name_and_error(mountPoint);
+ perror(mountPoint);
return 1;
}
@@ -52,7 +52,7 @@ df(const char * device, const char * mountPoint)
}
extern int
-df_main(struct FileInfo * i, int argc, char * * argv)
+df_main(int argc, char * * argv)
{
static const char header[] =
"Filesystem 1024-blocks Used Available Capacity Mounted on\n";
@@ -63,11 +63,9 @@ df_main(struct FileInfo * i, int argc, char * * argv)
int status;
while ( argc > 1 ) {
- if ( (mountEntry = findMountPoint(argv[1], "/etc/mtab")) == 0
- && (mountEntry = findMountPoint(argv[1], "/proc/mounts")) == 0 )
+ if ( (mountEntry = findMountPoint(argv[1], "/proc/mounts")) == 0 )
{
- fprintf(stderr, "%s: can't find mount point.\n"
- ,argv[1]);
+ fprintf(stderr, "%s: can't find mount point.\n" ,argv[1]);
return 1;
}
status = df(mountEntry->mnt_fsname, mountEntry->mnt_dir);
@@ -82,10 +80,8 @@ df_main(struct FileInfo * i, int argc, char * * argv)
FILE * mountTable;
struct mntent * mountEntry;
- if ( (mountTable = setmntent("/etc/mtab", "r")) == 0
- && (mountTable = setmntent("/proc/mounts", "r")) == 0
- ) {
- name_and_error("/etc/mtab");
+ if ( (mountTable = setmntent("/proc/mounts", "r")) == 0) {
+ perror("/proc/mounts");
return 1;
}
@@ -101,3 +97,48 @@ df_main(struct FileInfo * i, int argc, char * * argv)
return 0;
}
+
+
+
+
+/*
+ * Given a block device, find the mount table entry if that block device
+ * is mounted.
+ *
+ * Given any other file (or directory), find the mount table entry for its
+ * filesystem.
+ */
+extern struct mntent *
+findMountPoint(const char * name, const char * table)
+{
+ struct stat s;
+ dev_t mountDevice;
+ FILE * mountTable;
+ struct mntent * mountEntry;
+
+ if ( stat(name, &s) != 0 )
+ return 0;
+
+ if ( (s.st_mode & S_IFMT) == S_IFBLK )
+ mountDevice = s.st_rdev;
+ else
+ mountDevice = s.st_dev;
+
+
+ if ( (mountTable = setmntent(table, "r")) == 0 )
+ return 0;
+
+ while ( (mountEntry = getmntent(mountTable)) != 0 ) {
+ if ( strcmp(name, mountEntry->mnt_dir) == 0
+ || strcmp(name, mountEntry->mnt_fsname) == 0 ) /* String match. */
+ break;
+ if ( stat(mountEntry->mnt_fsname, &s) == 0
+ && s.st_rdev == mountDevice ) /* Match the device. */
+ break;
+ if ( stat(mountEntry->mnt_dir, &s) == 0
+ && s.st_dev == mountDevice ) /* Match the directory's mount point. */
+ break;
+ }
+ endmntent(mountTable);
+ return mountEntry;
+}