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Use libbb/get_line_from_file, change default state file location

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This commit is contained in:
Glenn L McGrath 2002-12-06 11:51:46 +00:00
parent cdbe5e5d4c
commit 398ff9d981
1 changed files with 39 additions and 128 deletions
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167
networking/ifupdown.c
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@ -3,7 +3,10 @@
* Based on ifupdown by Anthony Towns
* Copyright (c) 1999 Anthony Towns <aj@azure.humbug.org.au>
*
* Changes to upstream version
* Remove checks for kernel version, assume kernel version 2.2.0 or better
* Lines in the interfaces file cannot wrap.
* The default state file is moved to /var/run/ifstate
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@ -605,77 +608,6 @@ static int duplicate_if(interface_defn *ifa, interface_defn *ifb)
return(1);
}
static int get_line(char **result, size_t * result_len, FILE * f, int *line)
{
size_t pos;
do {
pos = 0;
do {
if (*result_len - pos < 10) {
char *newstr = xrealloc(*result, *result_len * 2 + 80);
*result = newstr;
*result_len = *result_len * 2 + 80;
}
if (!fgets(*result + pos, *result_len - pos, f)) {
if (ferror(f) == 0 && pos == 0)
return 0;
if (ferror(f) != 0)
return 0;
}
pos += xstrlen(*result + pos);
} while (pos == *result_len - 1 && (*result)[pos - 1] != '\n');
if (pos != 0 && (*result)[pos - 1] == '\n') {
(*result)[--pos] = '\0';
}
(*line)++;
{
int first = 0;
while (isspace((*result)[first]) && (*result)[first]) {
first++;
}
memmove(*result, *result + first, pos - first + 1);
pos -= first;
}
} while ((*result)[0] == '#');
while ((*result)[pos - 1] == '\\') {
(*result)[--pos] = '\0';
do {
if (*result_len - pos < 10) {
char *newstr = xrealloc(*result, *result_len * 2 + 80);
*result = newstr;
*result_len = *result_len * 2 + 80;
}
if (!fgets(*result + pos, *result_len - pos, f)) {
if (ferror(f) == 0 && pos == 0)
return 0;
if (ferror(f) != 0)
return 0;
}
pos += xstrlen(*result + pos);
} while (pos == *result_len - 1 && (*result)[pos - 1] != '\n');
if (pos != 0 && (*result)[pos - 1] == '\n') {
(*result)[--pos] = '\0';
}
(*line)++;
}
while (isspace((*result)[pos - 1])) { /* remove trailing whitespace */
pos--;
}
(*result)[pos] = '\0';
return 1;
}
static interfaces_file *read_interfaces(char *filename)
{
interface_defn *currif = NULL;
@ -687,8 +619,7 @@ static interfaces_file *read_interfaces(char *filename)
char firstword[80];
char *buf = NULL;
char *rest;
int line;
size_t buf_len = 0;
// int line;
enum { NONE, IFACE, MAPPING } currently_processing = NONE;
@ -701,9 +632,20 @@ static interfaces_file *read_interfaces(char *filename)
if (f == NULL) {
return NULL;
}
line = 0;
while (get_line(&buf, &buf_len, f, &line)) {
while ((buf = get_line_from_file(f)) != NULL) {
char *end;
if (buf[0] == '#') {
continue;
}
end = last_char_is(buf, '\n');
if (end) {
*end = '\0';
}
while ((end = last_char_is(buf, ' ')) != NULL) {
*end = '\0';
}
rest = next_word(buf, firstword, 80);
if (rest == NULL) {
continue; /* blank line */
@ -763,12 +705,12 @@ static interfaces_file *read_interfaces(char *filename)
rest = next_word(rest, method_name, 80);
if (rest == NULL) {
error_msg("%s:%d: too few parameters for iface line", filename, line);
error_msg("too few parameters for line \"%s\"", buf);
return NULL;
}
if (rest[0] != '\0') {
error_msg("%s:%d: too many parameters for iface line", filename, line);
error_msg("too many parameters \"%s\"", buf);
return NULL;
}
@ -776,13 +718,13 @@ static interfaces_file *read_interfaces(char *filename)
currif->address_family = get_address_family(addr_fams, address_family_name);
if (!currif->address_family) {
error_msg("%s:%d: unknown address type", filename, line);
error_msg("unknown address type \"%s\"", buf);
return NULL;
}
currif->method = get_method(currif->address_family, method_name);
if (!currif->method) {
error_msg("%s:%d: unknown method", filename, line);
error_msg("unknown method \"%s\"", buf);
return NULL;
}
@ -797,7 +739,7 @@ static interfaces_file *read_interfaces(char *filename)
while (*where != NULL) {
if (duplicate_if(*where, currif)) {
error_msg("%s:%d: duplicate interface", filename, line);
error_msg("duplicate interface \"%s\"", buf);
return NULL;
}
where = &(*where)->next;
@ -814,7 +756,7 @@ static interfaces_file *read_interfaces(char *filename)
for (i = 0; i < defn->n_autointerfaces; i++) {
if (strcmp(firstword, defn->autointerfaces[i]) == 0) {
perror_msg("%s:%d: interface declared auto twice", filename, line);
perror_msg("interface declared auto twice \"%s\"", buf);
return NULL;
}
}
@ -839,7 +781,7 @@ static interfaces_file *read_interfaces(char *filename)
int i;
if (xstrlen(rest) == 0) {
error_msg("%s:%d: option with empty value", filename, line);
error_msg("option with empty value \"%s\"", buf);
return NULL;
}
@ -849,7 +791,7 @@ static interfaces_file *read_interfaces(char *filename)
&& strcmp(firstword, "post-down") != 0) {
for (i = 0; i < currif->n_options; i++) {
if (strcmp(currif->option[i].name, firstword) == 0) {
error_msg("%s:%d: duplicate option", filename, line);
error_msg("duplicate option \"%s\"", buf);
return NULL;
}
}
@ -878,7 +820,7 @@ static interfaces_file *read_interfaces(char *filename)
#ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
if (strcmp(firstword, "script") == 0) {
if (currmap->script != NULL) {
error_msg("%s:%d: duplicate script in mapping", filename, line);
error_msg("duplicate script in mapping \"%s\"", buf);
return NULL;
} else {
currmap->script = xstrdup(rest);
@ -891,14 +833,14 @@ static interfaces_file *read_interfaces(char *filename)
currmap->mapping[currmap->n_mappings] = xstrdup(rest);
currmap->n_mappings++;
} else {
error_msg("%s:%d: misplaced option", filename, line);
error_msg("misplaced option \"%s\"", buf);
return NULL;
}
#endif
break;
case NONE:
default:
error_msg("%s:%d: misplaced option", filename, line);
error_msg("misplaced option \"%s\"", buf);
return NULL;
}
}
@ -908,7 +850,6 @@ static interfaces_file *read_interfaces(char *filename)
return NULL;
}
fclose(f);
line = -1;
return defn;
}
@ -1187,10 +1128,12 @@ extern int ifupdown_main(int argc, char **argv)
char **target_iface = NULL;
char **state = NULL; /* list of iface=liface */
char *interfaces = "/etc/network/interfaces";
char *statefile = "/etc/network/ifstate";
char *statefile = "/var/run/ifstate";
int do_all = 0;
#ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
int run_mappings = 1;
#endif
int do_all = 0;
int force = 0;
int n_target_ifaces = 0;
int n_state = 0;
@ -1258,45 +1201,13 @@ extern int ifupdown_main(int argc, char **argv)
}
if (state_fp != NULL) {
char buf[80];
char *p;
#if 0
if (!no_act) {
int flags;
struct flock lock;
const int state_fd = fileno(state_fp);
flags = fcntl(state_fd, F_GETFD);
if ((flags < 0) || (fcntl(state_fd, F_SETFD, flags | FD_CLOEXEC) < 0)) {
perror_msg_and_die("failed to set FD_CLOEXEC on statefile %s", statefile);
}
lock.l_type = F_WRLCK;
lock.l_whence = SEEK_SET;
lock.l_start = 0;
lock.l_len = 0;
if (fcntl(state_fd, F_SETLKW, &lock) < 0) {
perror_msg_and_die("failed to lock statefile %s", statefile);
}
}
#endif
rewind(state_fp);
while ((p = fgets(buf, sizeof buf, state_fp)) != NULL) {
char *pch;
pch = buf + xstrlen(buf) - 1;
while (pch > buf && isspace(*pch)) {
pch--;
}
*(pch + 1) = '\0';
pch = buf;
while (isspace(*pch)) {
pch++;
}
add_to_state(&state, &n_state, &max_state, xstrdup(pch));
char *start;
while ((start = get_line_from_file(state_fp)) != NULL) {
char *end_ptr;
/* We should only need to check for a single character */
end_ptr = start + strcspn(start, " \t\n");
*end_ptr = '\0';
add_to_state(&state, &n_state, &max_state, start);
}
}