/*
* utils.c - various utility functions used in pppd.
*
- * Copyright (c) 1999-2002 Paul Mackerras. All rights reserved.
+ * Copyright (c) 1999-2024 Paul Mackerras. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
- * 2. The name(s) of the authors of this software must not be used to
- * endorse or promote products derived from this software without
- * prior written permission.
- *
- * 3. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by Paul Mackerras
- * <paulus@samba.org>".
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
*
* THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
#include <sys/mkdev.h>
#endif
-#include "pppd.h"
+#include "pppd-private.h"
#include "fsm.h"
#include "lcp.h"
+#include "pathnames.h"
#if defined(SUNOS4)
extern char *strerror();
#endif
-static void logit(int, char *, va_list);
+static void logit(int, const char *, va_list);
static void log_write(int, char *);
static void vslp_printer(void *, char *, ...);
static void format_packet(u_char *, int, printer_func, void *);
* Returns the number of chars put into buf.
*/
int
-slprintf(char *buf, int buflen, char *fmt, ...)
+slprintf(char *buf, int buflen, const char *fmt, ...)
{
va_list args;
int n;
#define OUTCHAR(c) (buflen > 0? (--buflen, *buf++ = (c)): 0)
int
-vslprintf(char *buf, int buflen, char *fmt, va_list args)
+vslprintf(char *buf, int buflen, const char *fmt, va_list args)
{
int c, i, n;
int width, prec, fillch;
int base, len, neg, quoted;
- long lval = 0;
- unsigned long val = 0;
- char *str, *f, *buf0;
+ long long lval = 0;
+ unsigned long long val = 0;
+ char *str, *buf0;
+ const char *f;
unsigned char *p;
char num[32];
time_t t;
case 'l':
c = *fmt++;
switch (c) {
+ case 'l':
+ c = *fmt++;
+ switch (c) {
+ case 'd':
+ lval = va_arg(args, long long);
+ if (lval < 0) {
+ neg = 1;
+ val = -lval;
+ } else
+ val = lval;
+ base = 10;
+ break;
+ case 'u':
+ val = va_arg(args, unsigned long long);
+ base = 10;
+ break;
+ default:
+ OUTCHAR('%');
+ OUTCHAR('l');
+ OUTCHAR('l');
+ --fmt; /* so %llz outputs %llz etc. */
+ continue;
+ }
+ break;
case 'd':
lval = va_arg(args, long);
if (lval < 0) {
* logit - does the hard work for fatal et al.
*/
static void
-logit(int level, char *fmt, va_list args)
+logit(int level, const char *fmt, va_list args)
{
char buf[1024];
* fatal - log an error message and die horribly.
*/
void
-fatal(char *fmt, ...)
+fatal(const char *fmt, ...)
{
va_list pvar;
* error - log an error message.
*/
void
-error(char *fmt, ...)
+error(const char *fmt, ...)
{
va_list pvar;
* warn - log a warning message.
*/
void
-warn(char *fmt, ...)
+warn(const char *fmt, ...)
{
va_list pvar;
* notice - log a notice-level message.
*/
void
-notice(char *fmt, ...)
+notice(const char *fmt, ...)
{
va_list pvar;
* info - log an informational message.
*/
void
-info(char *fmt, ...)
+info(const char *fmt, ...)
{
va_list pvar;
* dbglog - log a debug message.
*/
void
-dbglog(char *fmt, ...)
+dbglog(const char *fmt, ...)
{
va_list pvar;
for (done = 0; done < count; ) {
nb = read(fd, ptr, count - done);
if (nb < 0) {
- if (errno == EINTR && !got_sigterm)
+ if (errno == EINTR && !ppp_signaled(SIGTERM))
continue;
return -1;
}
}
#endif
-/* Procedures for locking the serial device using a lock file. */
-#ifndef LOCK_DIR
-#ifdef __linux__
-#define LOCK_DIR "/var/lock"
-#else
-#ifdef SVR4
-#define LOCK_DIR "/var/spool/locks"
-#else
-#define LOCK_DIR "/var/spool/lock"
-#endif
-#endif
-#endif /* LOCK_DIR */
+/*
+ * mkdir_check - helper for mkdir_recursive, creates a directory
+ * but do not error on EEXIST if and only if entry is a directory
+ * The caller must check for errno == ENOENT if appropriate.
+ */
+static int
+mkdir_check(const char *path)
+{
+ struct stat statbuf;
+
+ if (mkdir(path, 0755) >= 0)
+ return 0;
+
+ if (errno == EEXIST) {
+ if (stat(path, &statbuf) < 0)
+ /* got raced? */
+ return -1;
+
+ if ((statbuf.st_mode & S_IFMT) == S_IFDIR)
+ return 0;
+
+ /* already exists but not a dir, treat as failure */
+ errno = EEXIST;
+ return -1;
+ }
+
+ return -1;
+}
+/*
+ * mkdir_parent - helper for mkdir_recursive, modifies the string in place
+ * Assumes mkdir(path) already failed, so it first creates the parent then
+ * full path again.
+ */
+static int
+mkdir_parent(char *path)
+{
+ char *slash;
+ int rc;
+
+ slash = strrchr(path, '/');
+ if (!slash)
+ return -1;
+
+ *slash = 0;
+ if (mkdir_check(path) < 0) {
+ if (errno != ENOENT) {
+ *slash = '/';
+ return -1;
+ }
+ if (mkdir_parent(path) < 0) {
+ *slash = '/';
+ return -1;
+ }
+ }
+ *slash = '/';
+
+ return mkdir_check(path);
+}
+
+/*
+ * mkdir_recursive - recursively create directory if it didn't exist
+ */
+int
+mkdir_recursive(const char *path)
+{
+ char *copy;
+ int rc;
+
+ // optimistically try on full path first to avoid allocation
+ if (mkdir_check(path) == 0)
+ return 0;
+
+ copy = strdup(path);
+ if (!copy)
+ return -1;
+
+ rc = mkdir_parent(copy);
+ free(copy);
+ return rc;
+}
+
+/* Procedures for locking the serial device using a lock file. */
static char lock_file[MAXPATHLEN];
/*
return -1;
}
slprintf(lock_file, sizeof(lock_file), "%s/LK.%03d.%03d.%03d",
- LOCK_DIR, major(sbuf.st_dev),
+ PPP_PATH_LOCKDIR, major(sbuf.st_dev),
major(sbuf.st_rdev), minor(sbuf.st_rdev));
#else
char *p;
if ((p = strrchr(dev, '/')) != NULL)
dev = p + 1;
- slprintf(lock_file, sizeof(lock_file), "%s/LCK..%s", LOCK_DIR, dev);
+ slprintf(lock_file, sizeof(lock_file), "%s/LCK..%s", PPP_PATH_LOCKDIR, dev);
#endif
while ((fd = open(lock_file, O_EXCL | O_CREAT | O_RDWR, 0644)) < 0) {
projects / ppp.git / blobdiff