107 lines
2.8 KiB
C
107 lines
2.8 KiB
C
/*
|
|
* Copyright 1998 by Albert Cahalan; all rights resered.
|
|
* This file may be used subject to the terms and conditions of the
|
|
* GNU Library General Public License Version 2, or any later version
|
|
* at your option, as published by the Free Software Foundation.
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Library General Public License for more details.
|
|
*/
|
|
#include <sys/types.h>
|
|
|
|
/* sanitize a string, without the nice BSD library function: */
|
|
/* strvis(vis_args, k->ki_args, VIS_TAB | VIS_NL | VIS_NOSLASH) */
|
|
int octal_escape_str(char *dst, const char *src, size_t n){
|
|
unsigned char c;
|
|
char d;
|
|
size_t i;
|
|
const char *codes =
|
|
"Z------abtnvfr-------------e----"
|
|
" *******************************" /* better: do not print any space */
|
|
"****************************\\***"
|
|
"*******************************-"
|
|
"--------------------------------"
|
|
"********************************"
|
|
"********************************"
|
|
"********************************";
|
|
for(i=0; i<n;){
|
|
c = (unsigned char) *(src++);
|
|
d = codes[c];
|
|
switch(d){
|
|
case 'Z':
|
|
goto leave;
|
|
case '*':
|
|
i++;
|
|
*(dst++) = c;
|
|
break;
|
|
case '-':
|
|
if(i+4 > n) goto leave;
|
|
i += 4;
|
|
*(dst++) = '\\';
|
|
*(dst++) = "01234567"[c>>6];
|
|
*(dst++) = "01234567"[(c>>3)&07];
|
|
*(dst++) = "01234567"[c&07];
|
|
break;
|
|
default:
|
|
if(i+2 > n) goto leave;
|
|
i += 2;
|
|
*(dst++) = '\\';
|
|
*(dst++) = d;
|
|
break;
|
|
}
|
|
}
|
|
leave:
|
|
*(dst++) = '\0';
|
|
return i;
|
|
}
|
|
|
|
/* sanitize a string via one-way mangle */
|
|
int simple_escape_str(char *dst, const char *src, size_t n){
|
|
unsigned char c;
|
|
size_t i;
|
|
const char *codes =
|
|
"Z-------------------------------"
|
|
"********************************"
|
|
"********************************"
|
|
"*******************************-"
|
|
"--------------------------------"
|
|
"********************************"
|
|
"********************************"
|
|
"********************************";
|
|
for(i=0; i<n;){
|
|
c = (unsigned char) *(src++);
|
|
switch(codes[c]){
|
|
case 'Z':
|
|
goto leave;
|
|
case '*':
|
|
i++;
|
|
*(dst++) = c;
|
|
break;
|
|
case '-':
|
|
i++;
|
|
*(dst++) = '?';
|
|
break;
|
|
}
|
|
}
|
|
leave:
|
|
*(dst++) = '\0';
|
|
return i;
|
|
}
|
|
|
|
/* escape a string as desired */
|
|
int escape_str(char *dst, const char *src, size_t n){
|
|
return simple_escape_str(dst, src, n);
|
|
}
|
|
|
|
/* escape an argv or environment string array */
|
|
int escape_strlist(char *dst, const char **src, size_t n){
|
|
size_t i = 0;
|
|
while(*src){
|
|
i += simple_escape_str(dst+i, *src, n-i);
|
|
if((n-i > 1) && (*(src+1))) dst[i++] = ' ';
|
|
src++;
|
|
}
|
|
return i;
|
|
}
|