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make parsemode() generic

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use for uudecode and chmod

Signed-off-by: Hiltjo Posthuma <hiltjo@codemadness.org>
This commit is contained in:
Hiltjo Posthuma
2014-04-09 15:17:20 +02:00
committed by sin
parent ff474a8cbc
commit 560340341f
5 changed files with 84 additions and 104 deletions
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77
util/mode.c Normal file
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@@ -0,0 +1,77 @@
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <sys/stat.h>
#include "../util.h"
void
parsemode(const char *str, mode_t *mode, int *oper)
{
char *end;
const char *p;
int octal;
mode_t mask = 0;
octal = strtol(str, &end, 8);
if(*end == '\0') {
if(octal < 0 || octal > 07777)
eprintf("%s: invalid mode\n", str);
if(octal & 04000) *mode |= S_ISUID;
if(octal & 02000) *mode |= S_ISGID;
if(octal & 01000) *mode |= S_ISVTX;
if(octal & 00400) *mode |= S_IRUSR;
if(octal & 00200) *mode |= S_IWUSR;
if(octal & 00100) *mode |= S_IXUSR;
if(octal & 00040) *mode |= S_IRGRP;
if(octal & 00020) *mode |= S_IWGRP;
if(octal & 00010) *mode |= S_IXGRP;
if(octal & 00004) *mode |= S_IROTH;
if(octal & 00002) *mode |= S_IWOTH;
if(octal & 00001) *mode |= S_IXOTH;
return;
}
for(p = str; *p; p++)
switch(*p) {
/* masks */
case 'u':
mask |= S_IRWXU;
break;
case 'g':
mask |= S_IRWXG;
break;
case 'o':
mask |= S_IRWXO;
break;
case 'a':
mask |= S_IRWXU|S_IRWXG|S_IRWXO;
break;
/* opers */
case '+':
case '-':
case '=':
if(oper)
*oper = (int)*p;
break;
/* modes */
case 'r':
*mode |= S_IRUSR|S_IRGRP|S_IROTH;
break;
case 'w':
*mode |= S_IWUSR|S_IWGRP|S_IWOTH;
break;
case 'x':
*mode |= S_IXUSR|S_IXGRP|S_IXOTH;
break;
case 's':
*mode |= S_ISUID|S_ISGID;
break;
case 't':
*mode |= S_ISVTX;
break;
/* error */
default:
eprintf("%s: invalid mode\n", str);
}
if(mask)
*mode &= mask;
}