1 files changed, 329 insertions, 0 deletions
diff --git a/package/nvram/src/shutils.c b/package/nvram/src/shutils.c
new file mode 100644
index 000000000..49ad41af8
--- /dev/null
+++ b/package/nvram/src/shutils.c
@@ -0,0 +1,329 @@
+/*
+ * Shell-like utility functions
+ *
+ * Copyright 2004, Broadcom Corporation
+ * All Rights Reserved.
+ * 
+ * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
+ * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
+ * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
+ *
+ * $Id$
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <error.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <unistd.h>
+#include <signal.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <termios.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <net/ethernet.h>
+
+#include <shutils.h>
+
+/*
+ * Reads file and returns contents
+ * @param	fd	file descriptor
+ * @return	contents of file or NULL if an error occurred
+ */
+char *
+fd2str(int fd)
+{
+	char *buf = NULL;
+	size_t count = 0, n;
+
+	do {
+		buf = realloc(buf, count + 512);
+		n = read(fd, buf + count, 512);
+		if (n < 0) {
+			free(buf);
+			buf = NULL;
+		}
+		count += n;
+	} while (n == 512);
+
+	close(fd);
+	if (buf)
+		buf[count] = '\0';
+	return buf;
+}
+
+/*
+ * Reads file and returns contents
+ * @param	path	path to file
+ * @return	contents of file or NULL if an error occurred
+ */
+char *
+file2str(const char *path)
+{
+	int fd;
+
+	if ((fd = open(path, O_RDONLY)) == -1) {
+		perror(path);
+		return NULL;
+	}
+
+	return fd2str(fd);
+}
+
+/* 
+ * Waits for a file descriptor to change status or unblocked signal
+ * @param	fd	file descriptor
+ * @param	timeout	seconds to wait before timing out or 0 for no timeout
+ * @return	1 if descriptor changed status or 0 if timed out or -1 on error
+ */
+int
+waitfor(int fd, int timeout)
+{
+	fd_set rfds;
+	struct timeval tv = { timeout, 0 };
+
+	FD_ZERO(&rfds);
+	FD_SET(fd, &rfds);
+	return select(fd + 1, &rfds, NULL, NULL, (timeout > 0) ? &tv : NULL);
+}
+
+/* 
+ * Concatenates NULL-terminated list of arguments into a single
+ * commmand and executes it
+ * @param	argv	argument list
+ * @param	path	NULL, ">output", or ">>output"
+ * @param	timeout	seconds to wait before timing out or 0 for no timeout
+ * @param	ppid	NULL to wait for child termination or pointer to pid
+ * @return	return value of executed command or errno
+ */
+int
+_eval(char *const argv[], char *path, int timeout, int *ppid)
+{
+	pid_t pid;
+	int status;
+	int fd;
+	int flags;
+	int sig;
+	char buf[254]="";
+	int i;
+
+	switch (pid = fork()) {
+	case -1:	/* error */
+		perror("fork");
+		return errno;
+	case 0:		/* child */
+		/* Reset signal handlers set for parent process */
+		for (sig = 0; sig < (_NSIG-1); sig++)
+			signal(sig, SIG_DFL);
+
+		/* Clean up */
+		ioctl(0, TIOCNOTTY, 0);
+		close(STDIN_FILENO);
+		close(STDOUT_FILENO);
+		close(STDERR_FILENO);
+		setsid();
+
+		/* We want to check the board if exist UART? , add by honor 2003-12-04 */
+		if ((fd = open("/dev/console", O_RDWR)) < 0) {
+                        (void) open("/dev/null", O_RDONLY);
+                        (void) open("/dev/null", O_WRONLY);
+                        (void) open("/dev/null", O_WRONLY);
+		}
+		else{
+			close(fd);
+                        (void) open("/dev/console", O_RDONLY);
+                        (void) open("/dev/console", O_WRONLY);
+                        (void) open("/dev/console", O_WRONLY);
+		}
+
+		/* Redirect stdout to <path> */
+		if (path) {
+			flags = O_WRONLY | O_CREAT;
+			if (!strncmp(path, ">>", 2)) {
+				/* append to <path> */
+				flags |= O_APPEND;
+				path += 2;
+			} else if (!strncmp(path, ">", 1)) {
+				/* overwrite <path> */
+				flags |= O_TRUNC;
+				path += 1;
+			}
+			if ((fd = open(path, flags, 0644)) < 0)
+				perror(path);
+			else {
+				dup2(fd, STDOUT_FILENO);
+				close(fd);
+			}
+		}
+
+		/* execute command */
+		for(i=0 ; argv[i] ; i++)
+			snprintf(buf+strlen(buf), sizeof(buf), "%s ", argv[i]);
+		dprintf("cmd=[%s]\n", buf);
+		setenv("PATH", "/sbin:/bin:/usr/sbin:/usr/bin", 1);
+		alarm(timeout);
+		execvp(argv[0], argv);
+		perror(argv[0]);
+		exit(errno);
+	default:	/* parent */
+		if (ppid) {
+			*ppid = pid;
+			return 0;
+		} else {
+			waitpid(pid, &status, 0);
+			if (WIFEXITED(status))
+				return WEXITSTATUS(status);
+			else
+				return status;
+		}
+	}
+}
+
+/* 
+ * Concatenates NULL-terminated list of arguments into a single
+ * commmand and executes it
+ * @param	argv	argument list
+ * @return	stdout of executed command or NULL if an error occurred
+ */
+char *
+_backtick(char *const argv[])
+{
+	int filedes[2];
+	pid_t pid;
+	int status;
+	char *buf = NULL;
+
+	/* create pipe */
+	if (pipe(filedes) == -1) {
+		perror(argv[0]);
+		return NULL;
+	}
+
+	switch (pid = fork()) {
+	case -1:	/* error */
+		return NULL;
+	case 0:		/* child */
+		close(filedes[0]);	/* close read end of pipe */
+		dup2(filedes[1], 1);	/* redirect stdout to write end of pipe */
+		close(filedes[1]);	/* close write end of pipe */
+		execvp(argv[0], argv);
+		exit(errno);
+		break;
+	default:	/* parent */
+		close(filedes[1]);	/* close write end of pipe */
+		buf = fd2str(filedes[0]);
+		waitpid(pid, &status, 0);
+		break;
+	}
+	
+	return buf;
+}
+
+/* 
+ * Kills process whose PID is stored in plaintext in pidfile
+ * @param	pidfile	PID file
+ * @return	0 on success and errno on failure
+ */
+int
+kill_pidfile(char *pidfile)
+{
+	FILE *fp = fopen(pidfile, "r");
+	char buf[256];
+
+	if (fp && fgets(buf, sizeof(buf), fp)) {
+		pid_t pid = strtoul(buf, NULL, 0);
+		fclose(fp);
+		return kill(pid, SIGTERM);
+  	} else
+		return errno;
+}
+
+/*
+ * fread() with automatic retry on syscall interrupt
+ * @param	ptr	location to store to
+ * @param	size	size of each element of data
+ * @param	nmemb	number of elements
+ * @param	stream	file stream
+ * @return	number of items successfully read
+ */
+int
+safe_fread(void *ptr, size_t size, size_t nmemb, FILE *stream)
+{
+	size_t ret = 0;
+
+	do {
+		clearerr(stream);
+		ret += fread((char *)ptr + (ret * size), size, nmemb - ret, stream);
+	} while (ret < nmemb && ferror(stream) && errno == EINTR);
+
+	return ret;
+}
+
+/*
+ * fwrite() with automatic retry on syscall interrupt
+ * @param	ptr	location to read from
+ * @param	size	size of each element of data
+ * @param	nmemb	number of elements
+ * @param	stream	file stream
+ * @return	number of items successfully written
+ */
+int
+safe_fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
+{
+	size_t ret = 0;
+
+	do {
+		clearerr(stream);
+		ret += fwrite((char *)ptr + (ret * size), size, nmemb - ret, stream);
+	} while (ret < nmemb && ferror(stream) && errno == EINTR);
+
+	return ret;
+}
+
+/*
+ * Convert Ethernet address string representation to binary data
+ * @param	a	string in xx:xx:xx:xx:xx:xx notation
+ * @param	e	binary data
+ * @return	TRUE if conversion was successful and FALSE otherwise
+ */
+int
+ether_atoe(const char *a, unsigned char *e)
+{
+	char *c = (char *) a;
+	int i = 0;
+
+	memset(e, 0, ETHER_ADDR_LEN);
+	for (;;) {
+		e[i++] = (unsigned char) strtoul(c, &c, 16);
+		if (!*c++ || i == ETHER_ADDR_LEN)
+			break;
+	}
+	return (i == ETHER_ADDR_LEN);
+}
+
+/*
+ * Convert Ethernet address binary data to string representation
+ * @param	e	binary data
+ * @param	a	string in xx:xx:xx:xx:xx:xx notation
+ * @return	a
+ */
+char *
+ether_etoa(const unsigned char *e, char *a)
+{
+	char *c = a;
+	int i;
+
+	for (i = 0; i < ETHER_ADDR_LEN; i++) {
+		if (i)
+			*c++ = ':';
+		c += sprintf(c, "%02X", e[i] & 0xff);
+	}
+	return a;
+}