massrename.c

#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>


int main ( int argc, char * argv[] )
{
  int retval=0;
  int len=0;
  char srcname[PATH_MAX+10];
  char dstname[PATH_MAX+10];
  FILE * srcfile;
  FILE * dstfile;

  if ( argc != 3 ) {
    fprintf(stderr, "massrename srcfile dstfile\n");
    exit(1);
  }
  srcfile=fopen(argv[1], "r");
  dstfile=fopen(argv[2], "r");
  if ( srcfile==NULL || dstfile==NULL ) {
    perror("fopen");
    exit(2);
  }
  while ( !feof(srcfile) && !feof(dstfile)) {
    if (NULL==fgets(srcname, PATH_MAX, srcfile) ) {
      break;
    }
    if (NULL==fgets(dstname, PATH_MAX, dstfile) ) {
      perror("fgets(dstname):");
      break;
    }
    len=strlen(dstname);
    dstname[len-1]='\0';
    len=strlen(srcname);
    srcname[len-1]='\0';
    if (0==strcmp(srcname,dstname))
      continue;

    if ( 0 != rename(srcname,dstname)) {
      retval++;
      perror("rename:");
    }

  }
  return retval;
}