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#include <config.h>
#include <stdlib.h>
#include <string.h>
#ifdef USE_DMALLOC
#include <dmalloc.h>
#endif
#include <stdio.h>
#include <math.h>
#include <glob.h>
#include <sys/stat.h>
#include "libhdr.h"
struct bkfile {
char *name;
int num;
};
static int cmp_func(const void *s1,const void *s2)
{
int i,j,k;
i=((struct bkfile *)s1)->num;
j=((struct bkfile *)s2)->num;
if(i<j) k=1;
else if(i>j) k=-1;
else k=0;
return k;
}
int mkbackup(const char *fname,int nback)
{
int i=0,j,k,k1,k2;
char *buf,*p,*p1;
struct stat sbuf;
struct bkfile *bkfiles;
glob_t globbuf;
if(!fname) {
(void)fprintf(stderr,"mkbackup(): NULL filename\n");
return -1;
}
if(nback<1) {
(void)fprintf(stderr,"mkbackup(): invalid backup number\n");
return -1;
}
if(nback==1) {
if(!stat(fname,&sbuf)) {
i=1;
j=(int)strlen(fname);
buf=(char *)malloc((size_t)j+2);
if(buf) {
(void)strcpy(buf,fname);
buf[j]='~';
buf[j+1]='\0';
i=rename(fname,buf);
free(buf);
}
if(i) (void)fprintf(stderr,"mkbackup(): Couldn't rename old seedfile\n");
}
} else {
j=(int)strlen(fname);
buf=malloc((size_t)j+2);
i=1;
if(buf) {
(void)strcpy(buf,fname);
buf[j]='*';
buf[j+1]='\0';
globbuf.gl_offs=2;
(void)glob(buf,0,NULL,&globbuf);
free(buf);
if(globbuf.gl_pathc) {
bkfiles=malloc(sizeof(struct bkfile)*globbuf.gl_pathc);
if(bkfiles) {
for(k=k1=0;k<(int)globbuf.gl_pathc;k++) {
p=globbuf.gl_pathv[k];
if(p[j]=='~') {
k2=(int)strtol(p+j+1,&p1,10);
if(k2>0 && k2<nback && *p1++=='~' && *p1=='\0') {
bkfiles[k1].name=p;
bkfiles[k1++].num=k2;
}
} else if(p[j]=='\0') {
bkfiles[k1].name=p;
bkfiles[k1++].num=0;
}
}
if(k1) {
qsort(bkfiles,(size_t)k1,sizeof(struct bkfile),cmp_func);
k2=1+(int)(log((double)nback)/log(10.0));
buf=malloc((size_t)(k2+3+j));
if(buf) {
for(k=0;k<k1;k++) {
(void)sprintf(buf,"%s~%d~",fname,bkfiles[k].num+1);
i=rename(bkfiles[k].name,buf);
if(i) break;
}
free(buf);
}
} else i=0;
free(bkfiles);
}
} else i=0;
globfree(&globbuf);
}
}
return i;
}
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