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Diffstat (limited to 'reference/C/EXAMPLES/statfs.c')
| -rw-r--r-- | reference/C/EXAMPLES/statfs.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/reference/C/EXAMPLES/statfs.c b/reference/C/EXAMPLES/statfs.c new file mode 100644 index 0000000..f5a41a8 --- /dev/null +++ b/reference/C/EXAMPLES/statfs.c @@ -0,0 +1,117 @@ + +/************************************************************************ + * + * Purpose: Program to demonstrate the 'statfs' function. + * The program will show the number of free blocks + * on the /tmp filesystem. + * + * Author: M J Leslie + * + * Date: 09-Nov-97 MJL Inital Release + * + * Notes: This function is only available on older unix systems. + * SVR4 systems replaced statfs with statvfs. + * + ************************************************************************/ + +#include <sys/types.h> +#include <sys/vfs.h> + +#define UNDEF -1 +#define OK 0 +#define FAIL 1 + +void GetFileSystemStat( + const char *Path, /* I Path to a file on the file system to be queried */ + long *BSize, /* O Size of blocks on this file system */ + long *Blocks, /* O Total no. of blocks on this file system */ + long *BFree, /* O No. of blocks still available to an ordinary user */ + long *Files, /* O Maximum no. of files possible on this file system */ + long *FFree, /* O No. of free file nodes (ie max - currently allocated) */ + int *Status); /* O Returned status of this function call: + OK File system parameters found + FAIL Unable to determine file system + parameters */ + +main() +{ + long BSize; + long Blocks; + long BFree; + long Files; + long FFree; + int Status; + + GetFileSystemStat("/tmp", /* I Path to a file on the file system to be queried */ + &BSize, /* O Size of blocks on this file system */ + &Blocks, /* O Total no. of blocks on this file system */ + &BFree, /* O No. of blocks still available to an ordinary user */ + &Files, /* O Maximum no. of files possible on this file system */ + &FFree, /* O No. of free file nodes (ie max - currently allocated) */ + &Status); /* O REturned status of this function call: + OK File system parameters found + FAIL */ + + printf("Free Blocks = %d\n", BFree); + +} + + +/* PUBLIC FUNCTION + ******************************************************************************** + ** + ** mos_GetFileSystemStat + ** + ** DESCRIPTION + ** + ** Gets information on the file-system on which a particular file resides + ** + ** IMPLEMENTATION NOTES + ** + ** On some file systems (eg NFS mounted partitions) it may not be possible + ** to determine all the required parameters. In these cases the returned + ** value will be set to MOS_UNDEF. + ** + ******************************************************************************** +*/ + +void GetFileSystemStat( + const char *Path, /* I Path to a file on the file system to be queried */ + long *BSize, /* O Size of blocks on this file system */ + long *Blocks, /* O Total no. of blocks on this file system */ + long *BFree, /* O No. of blocks still available to an ordinary user */ + long *Files, /* O Maximum no. of files possible on this file system */ + long *FFree, /* O No. of free file nodes (ie max - currently allocated) */ + int *Status) /* O returned status of this function call: + OK File system parameters found + FAIL Unable to determine file system + parameters */ + +{ + struct statfs FSBuf; /* structure to contain file system information */ + + int locStatus; /* local status value */ + + locStatus = statfs(Path, &FSBuf); + + if (locStatus != 0) + { + *BSize = UNDEF; + *Blocks = UNDEF; + *BFree = UNDEF; + *Files = UNDEF; + *FFree = UNDEF; + + *Status = FAIL; + } + else + { + *BSize = FSBuf.f_bsize; + *Blocks = FSBuf.f_blocks; + *BFree = FSBuf.f_bavail; + *Files = FSBuf.f_files; + *FFree = FSBuf.f_ffree; + + *Status = OK; + } +} |