Leaked source code of windows server 2003
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188 lines
6.0 KiB

/* STRINGS.C:
* This program dumps all the ascii strings in a
* file.
*
* History:
* 05-Jan-1992 IanJa obtained from \\toolsvr\contrib\petes\slm\src\TOOLS
* 05-Jan-1992 IanJa use buffered reads for small efficiency gain
* 22-Feb-1992 IanJa Unicode strings too if -U used.
* 17-Feb-1997 RajeevD added -a option
*/
#include <stdio.h> /* Standard I/O definitions */
#include <stdlib.h> /* Standard atoi types */
#include <process.h>
#define EOL "\n"
#define RDBIN "rb"
#define isascii(c) ((c) >= ' ' && (c) <= '~')
/* True if char is printable ascii */
#define isswitch(s) (((s)[0] == '-') || ((s)[0] == '/'))
/* True if string is switch */
#define swchar(s) ((s)[1]) /* Switch character */
#define MAXLEN 128 /* Max. minimum "string" length */
char prognam[] = "strings";
#define USAGE_FMT "usage: %s [-a][-U][-O][-l <length>]<file list>\n"
#define BUFSZ 512
char inBuf[BUFSZ];
void
__cdecl main(argc,argv)
int argc;
char **argv;
{
FILE *fi;
char save[MAXLEN];
int strlen;
char *p;
int nRead;
int i;
int argi;
long offset = 0L;
int threshold = 4;
int foffset = 0;
int fUnicode = 0;
int fAnnotate = 0;
if(argc == 1)
{
fprintf(stderr,USAGE_FMT,argv[0]);
fprintf(stderr," -a\tannotates each match with filename\n");
exit(1);
}
for(argi = 1,i = 1; argi < argc; ++argi)
{
if(isswitch(argv[argi]))
{
switch(swchar(argv[argi]))
{
case 'U':
fUnicode = 1;
break;
case 'O':
foffset = 1;
break;
case 'l':
if (argv[argi][2])
{
threshold = atoi(&argv[argi][2]);
}
else if(++argi == argc)
{
fprintf(stderr,"%s: missing length\n",argv[0]);
exit(1);
}
else
{
threshold = atoi(argv[argi]);
}
if(threshold > MAXLEN)
{
fprintf(stderr, "%s: length %d should be <= %d\n",
argv[0], threshold, MAXLEN);
exit(1);
}
break;
case 'a':
case 'A':
fAnnotate = 1;
break;
case '?':
fprintf(stderr,USAGE_FMT,argv[0]);
fprintf(stderr," -a\tannotates each match with filename\n");
exit(1);
default:
fprintf(stderr,"%s: unknown switch \"%s\"\n",
argv[0],argv[argi]);
exit(1);
}
}
else argv[i++] = argv[argi];
}
argc = i;
for(i = 1; i < argc; ++i)
{
if((fi = fopen(argv[i],RDBIN)) == NULL)
{
fprintf(stderr,"%s: cannot open \"%s\"\n",argv[0],argv[i]);
continue;
}
if (!fAnnotate)
fprintf(stdout,"%s:\n",argv[i]);
strlen = 0;
save[threshold - 1] = '\0';
while((nRead = fread(inBuf, 1, BUFSZ, fi)) > 0)
{
for (p = inBuf; p < &inBuf[nRead]; p++)
{
if(isascii(*p))
{
if(strlen < threshold - 1) save[strlen++] = *p;
else
{
if(strlen++ == threshold - 1)
{
if (fAnnotate)
fprintf (stdout, "%s: ", argv[i]);
if(foffset) fprintf(stdout,"%06lx: ",
offset - threshold + 1);
fputs(save,stdout);
}
putc(*p,stdout);
}
}
else
{
if(strlen >= threshold) fputs(EOL,stdout);
strlen = 0;
}
++offset;
}
if (fUnicode)
{
for (p = inBuf; p < &inBuf[nRead-1]; p++)
{
if(isascii(*p) && (p[1] == 0x00))
{
if(strlen < threshold - 1) save[strlen++] = *p;
else
{
if(strlen++ == threshold - 1)
{
if (fAnnotate)
fprintf (stdout, "%s: ", argv[i]);
fprintf(stdout, "U: ");
if(foffset) fprintf(stdout,"%06lx: ",
offset - threshold + 1);
fputs(save,stdout);
}
putc(*p,stdout);
}
++p;
}
else
{
if(strlen >= threshold) fputs(EOL,stdout);
strlen = 0;
}
++offset;
}
}
}
if(strlen >= threshold) fputs(EOL,stdout);
if (!feof(fi))
{
fprintf(stderr,"%s: error reading \"%s\"\n",argv[0],argv[i]);
continue;
}
fclose(fi);
}
exit(0);
}