busybox/libbb/concat_path_file.c

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/*
* busybox library eXtendet funcion
*
* concatenate path and file name to new allocation buffer,
* not addition '/' if path name already have '/'
*
*/
#include "libbb.h"
extern char *concat_path_file(const char *path, const char *filename)
{
char *outbuf;
int l;
int flg_slash = 1;
l = strlen(path);
if (l>0 && path[l-1] == '/')
flg_slash--;
l += strlen(filename);
if (l>0 && filename[0] == '/')
flg_slash--;
outbuf = xmalloc(l+1+flg_slash);
sprintf(outbuf, (flg_slash ? "%s/%s" : "%s%s"), path, filename);
return outbuf;
}