Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / tools / env / fw_env_main.c

diff --git a/qemu/roms/u-boot/tools/env/fw_env_main.c b/qemu/roms/u-boot/tools/env/fw_env_main.c
new file mode 100644 (file)
index 0000000..ce50d58
--- /dev/null
+++ b/qemu/roms/u-boot/tools/env/fw_env_main.c
@@ -0,0 +1,147 @@
+/*
+ * (C) Copyright 2000-2008
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+/*
+ * Command line user interface to firmware (=U-Boot) environment.
+ *
+ * Implements:
+ *     fw_printenv [ -a key ] [[ -n name ] | [ name ... ]]
+ *              - prints the value of a single environment variable
+ *                "name", the ``name=value'' pairs of one or more
+ *                environment variables "name", or the whole
+ *                environment if no names are specified.
+ *     fw_setenv [ -a key ] name [ value ... ]
+ *             - If a name without any values is given, the variable
+ *               with this name is deleted from the environment;
+ *               otherwise, all "value" arguments are concatenated,
+ *               separated by single blank characters, and the
+ *               resulting string is assigned to the environment
+ *               variable "name"
+ *
+ * If '-a key' is specified, the env block is encrypted with AES 128 CBC.
+ * The 'key' argument is in the format of 32 hexadecimal numbers (16 bytes
+ * of AES key), eg. '-a aabbccddeeff00112233445566778899'.
+ */
+
+#include <fcntl.h>
+#include <getopt.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/file.h>
+#include <unistd.h>
+#include "fw_env.h"
+
+#define        CMD_PRINTENV    "fw_printenv"
+#define CMD_SETENV     "fw_setenv"
+
+static struct option long_options[] = {
+       {"script", required_argument, NULL, 's'},
+       {"help", no_argument, NULL, 'h'},
+       {NULL, 0, NULL, 0}
+};
+
+void usage(void)
+{
+
+       fprintf(stderr, "fw_printenv/fw_setenv, "
+               "a command line interface to U-Boot environment\n\n"
+               "usage:\tfw_printenv [-a key] [-n] [variable name]\n"
+               "\tfw_setenv [-a key] [variable name] [variable value]\n"
+               "\tfw_setenv -s [ file ]\n"
+               "\tfw_setenv -s - < [ file ]\n\n"
+               "The file passed as argument contains only pairs "
+               "name / value\n"
+               "Example:\n"
+               "# Any line starting with # is treated as comment\n"
+               "\n"
+               "\t      netdev         eth0\n"
+               "\t      kernel_addr    400000\n"
+               "\t      var1\n"
+               "\t      var2          The quick brown fox jumps over the "
+               "lazy dog\n"
+               "\n"
+               "A variable without value will be dropped. It is possible\n"
+               "to put any number of spaces between the fields, but any\n"
+               "space inside the value is treated as part of the value "
+               "itself.\n\n"
+       );
+}
+
+int main(int argc, char *argv[])
+{
+       char *p;
+       char *cmdname = *argv;
+       char *script_file = NULL;
+       int c;
+       const char *lockname = "/var/lock/" CMD_PRINTENV ".lock";
+       int lockfd = -1;
+       int retval = EXIT_SUCCESS;
+
+       lockfd = open(lockname, O_WRONLY | O_CREAT | O_TRUNC, 0666);
+       if (-1 == lockfd) {
+               fprintf(stderr, "Error opening lock file %s\n", lockname);
+               return EXIT_FAILURE;
+       }
+
+       if (-1 == flock(lockfd, LOCK_EX)) {
+               fprintf(stderr, "Error locking file %s\n", lockname);
+               close(lockfd);
+               return EXIT_FAILURE;
+       }
+
+       if ((p = strrchr (cmdname, '/')) != NULL) {
+               cmdname = p + 1;
+       }
+
+       while ((c = getopt_long (argc, argv, "a:ns:h",
+               long_options, NULL)) != EOF) {
+               switch (c) {
+               case 'a':
+                       /* AES key, handled later */
+                       break;
+               case 'n':
+                       /* handled in fw_printenv */
+                       break;
+               case 's':
+                       script_file = optarg;
+                       break;
+               case 'h':
+                       usage();
+                       goto exit;
+               default: /* '?' */
+                       fprintf(stderr, "Try `%s --help' for more information."
+                               "\n", cmdname);
+                       retval = EXIT_FAILURE;
+                       goto exit;
+               }
+       }
+
+       if (strcmp(cmdname, CMD_PRINTENV) == 0) {
+               if (fw_printenv(argc, argv) != 0)
+                       retval = EXIT_FAILURE;
+       } else if (strcmp(cmdname, CMD_SETENV) == 0) {
+               if (!script_file) {
+                       if (fw_setenv(argc, argv) != 0)
+                               retval = EXIT_FAILURE;
+               } else {
+                       if (fw_parse_script(script_file) != 0)
+                               retval = EXIT_FAILURE;
+               }
+       } else {
+               fprintf(stderr,
+                       "Identity crisis - may be called as `" CMD_PRINTENV
+                       "' or as `" CMD_SETENV "' but not as `%s'\n",
+                       cmdname);
+               retval = EXIT_FAILURE;
+       }
+
+exit:
+       flock(lockfd, LOCK_UN);
+       close(lockfd);
+       return retval;
+}