passwd: rework:

* do not make backup copy by copying (just retain old file)
* correctly fall back to /etc/passwd if user is not in shadow
* fix bug with overlong passwd entries
* be permissive on some kinds of failures
* reduce stack usage
* code size: -500 bytes
This commit is contained in:
Denis Vlasenko
2006-11-30 16:41:15 +00:00
parent b8bb27c7ea
commit ab24e18c7a
5 changed files with 288 additions and 320 deletions

View File

@@ -9,11 +9,9 @@
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include <stdio.h>
#include <stdlib.h>
#include "libbb.h"
/* get_line_from_file() - This function reads an entire line from a text file,
/* This function reads an entire line from a text file,
* up to a newline or NUL byte. It returns a malloc'ed char * which must be
* stored and free'ed by the caller. If end is null '\n' isn't considered
* end of line. If end isn't null, length of the chunk read is stored in it. */
@@ -37,10 +35,12 @@ char *bb_get_chunk_from_file(FILE * file, int *end)
if (end)
*end = idx;
if (linebuf) {
if (ferror(file)) {
free(linebuf);
return NULL;
}
// huh, is fgets discards prior data on error like this?
// I don't think so....
//if (ferror(file)) {
// free(linebuf);
// return NULL;
//}
linebuf = xrealloc(linebuf, idx+1);
linebuf[idx] = 0;
}