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/*
* Copyright 2005-2024 Gentoo Foundation
* Distributed under the terms of the GNU General Public License v2
*
* Copyright 2005-2008 Ned Ludd - <solar@gentoo.org>
* Copyright 2005-2014 Mike Frysinger - <vapier@gentoo.org>
* Copyright 2018- Fabian Groffen - <grobian@gentoo.org>
*/
#include "main.h"
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include "contents.h"
/*
* Parse a line of CONTENTS file and provide access to the individual fields
*/
contents_entry *
contents_parse_line_len(char *line, size_t len)
{
static contents_entry e;
char *p;
if (len == 0 || line == NULL || *line == '\0' || *line == '\n')
return NULL;
/* chop trailing newline */
p = &line[len - 1];
if (*p == '\n') {
*p = '\0';
len--;
}
if (len <= 4) /* minimal: "dir /" */
return NULL;
memset(&e, 0x00, sizeof(e));
e._data = line;
if (!strncmp(e._data, "obj ", 4))
e.type = CONTENTS_OBJ;
else if (!strncmp(e._data, "dir ", 4))
e.type = CONTENTS_DIR;
else if (!strncmp(e._data, "sym ", 4))
e.type = CONTENTS_SYM;
else
return NULL;
e.name = e._data + 4;
len -= 4;
switch (e.type) {
/* dir /bin */
case CONTENTS_DIR:
break;
/* obj /bin/bash 62ed51c8b23866777552643ec57614b0 1120707577 */
case CONTENTS_OBJ:
for (p = &e.name[len - 1]; p >= e.name; p--) {
if (*p == ' ') {
if (e.mtime_str == NULL)
e.mtime_str = p + 1;
else if (e.digest == NULL)
e.digest = p + 1;
*p = '\0';
if (e.digest != NULL)
break;
}
}
break;
/* sym /bin/sh -> bash 1120707577 */
case CONTENTS_SYM:
for (p = &e.name[len - 1]; p >= e.name; p--) {
if (*p == ' ') {
if (e.mtime_str == NULL) {
e.mtime_str = p + 1;
} else if (e.sym_target == NULL) {
if (strncmp(p, " -> ", sizeof(" -> ") - 1) == 0)
e.sym_target = p + sizeof(" -> ") - 1;
else
continue;
}
*p = '\0';
if (e.sym_target != NULL)
break;
}
}
break;
}
if (e.mtime_str) {
e.mtime = strtol(e.mtime_str, NULL, 10);
if (e.mtime == LONG_MAX) {
e.mtime = 0;
e.mtime_str = NULL;
}
}
return &e;
}
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