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#include <stdio.h>
#include <malloc.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "../include/os.h"
#include "../include/strexp.h"
#include "../include/prochandle.h"
#include "../include/fio.h"
#include "../include/df.h"
/*
* Returns a dynamically allocated array of device listings.
* The number of device listings allocated will be indicated
* by total.
*/
df_stat_struct **DiskFreeGetListing(int *total)
{
int i, n;
char *strptr, *strptr2;
char tmp_file[PATH_MAX + NAME_MAX];
pid_t p;
struct stat stat_buf;
char **strv;
int strc;
FILE *fp;
df_stat_struct **df_stat = NULL;
char df_mounted_on[NAME_MAX + PATH_MAX];
char df_filesystem[NAME_MAX + PATH_MAX];
off_t df_total;
off_t df_used;
off_t df_available;
/* Pointer to total must exist. */
if(total == NULL)
return(df_stat);
else
*total = 0;
/* Get tempory file name. */
strptr = tmpnam(NULL);
if(strptr == NULL)
return(df_stat);
strncpy(tmp_file, strptr, PATH_MAX + NAME_MAX);
tmp_file[PATH_MAX + NAME_MAX - 1] = '\0';
/* Make sure temp file does NOT exist before running. */
if(!stat(tmp_file, &stat_buf))
return(df_stat);
/* Run df program, blocking execution. */
p = ExecBAO(DF_CMD, tmp_file);
if(p < 0)
return(df_stat);
/* Check if output file exists. */
if(stat(tmp_file, &stat_buf))
return(df_stat);
fp = fopen(tmp_file, "rb");
if(fp == NULL)
return(df_stat);
/* Skip past first line. */
strptr = FReadNextLineAlloc(fp, '#');
if(strptr == NULL)
{
fclose(fp);
return(df_stat);
}
free(strptr); /* Discard first line. */
/* Begin reading each line. */
strptr = FReadNextLineAlloc(fp, '#');
while(strptr != NULL)
{
/* Begin parsing line. */
/* Remove carrage returns at the end of the line. */
strptr2 = strchr(strptr, '\n');
if(strptr2 != NULL)
*strptr2 = '\0';
strptr2 = strchr(strptr, '\r');
if(strptr2 != NULL)
*strptr2 = '\0';
/* Explode line. */
strv = strexp(strptr, &strc);
/* Get filesystem. */
if(strc >= 1)
strncpy(df_filesystem, strv[0], NAME_MAX + PATH_MAX);
df_filesystem[NAME_MAX + PATH_MAX - 1] = '\0';
/* Get total. */
df_total = (strc >= 2) ? atol(strv[1]) : 0;
/* Get used. */
df_used = (strc >= 3) ? atol(strv[2]) : 0;
/* Get available. */
df_available = (strc >= 4) ? atol(strv[3]) : 0;
/* Skip capacity %. */
/* Get mounted on. */
if(strc >= 6)
strncpy(df_mounted_on, strv[5], NAME_MAX + PATH_MAX);
df_mounted_on[NAME_MAX + PATH_MAX - 1] = '\0';
/* Free exploded strings. */
for(i = 0; i < strc; i++)
{
free(strv[i]);
}
free(strv);
strv = NULL;
/* Free current line and read next line. */
free(strptr);
strptr = FReadNextLineAlloc(fp, '#');
/* Allocate one more pointer for a df_stat_struct. */
n = *total;
*total += 1;
df_stat = (df_stat_struct **)realloc(
df_stat,
(*total) * sizeof(df_stat_struct *)
);
if(df_stat == NULL)
{
*total = 0;
return(df_stat);
}
/* Allocate a df_stat_struct. */
df_stat[n] = (df_stat_struct *)calloc(
1,
sizeof(df_stat_struct)
);
if(df_stat[n] == NULL)
{
*total -= 1;
}
/* Set new values (convert to required units). */
#if defined(_AIX_)
strncpy(df_stat[n]->filesystem, df_filesystem, NAME_MAX + PATH_MAX);
df_stat[n]->filesystem[NAME_MAX + PATH_MAX - 1] = '\0';
/* AIX returns in units of 512 bytes. */
df_stat[n]->total = df_total * 2;
df_stat[n]->used = df_used * 2;
df_stat[n]->available = df_available * 2;
strncpy(df_stat[n]->mounted_on, df_mounted_on, NAME_MAX + PATH_MAX);
df_stat[n]->mounted_on[NAME_MAX + PATH_MAX - 1] = '\0';
#else
/* All other systems should return in units of 1024 bytes. */
strncpy(df_stat[n]->filesystem, df_filesystem, NAME_MAX + PATH_MAX);
df_stat[n]->filesystem[NAME_MAX + PATH_MAX - 1] = '\0';
df_stat[n]->total = df_total;
df_stat[n]->used = df_used;
df_stat[n]->available = df_available;
strncpy(df_stat[n]->mounted_on, df_mounted_on, NAME_MAX + PATH_MAX);
df_stat[n]->mounted_on[NAME_MAX + PATH_MAX - 1] = '\0';
#endif
}
/* Close file. */
fclose(fp);
fp = NULL;
/* Remove file. */
unlink(tmp_file);
tmp_file[0] = '\0';
return(df_stat);
}
void DiskFreeDeleteListing(df_stat_struct **df_stat, int total)
{
int i;
for(i = 0; i < total; i++)
free(df_stat[i]);
free(df_stat);
return;
}
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