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This commit is contained in:
Eric Andersen
1999-10-06 20:25:32 +00:00
parent 9d3aba7b37
commit 17d49efd8c
21 changed files with 597 additions and 430 deletions
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61
df.c
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@ -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;
}