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tools: env: update usage strings

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Signed-off-by: Andreas Fenkart <andreas.fenkart@digitalstrom.com>
This commit is contained in:
Andreas Fenkart 2015-12-09 13:13:27 +01:00 committed by Tom Rini
parent af93e3d8ab
commit b92ae3af6e
1 changed files with 75 additions and 42 deletions
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117
tools/env/fw_env_main.c vendored
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@ -36,12 +36,16 @@
#include <unistd.h>
#include "fw_env.h"
#define CMD_PRINTENV "fw_printenv"
#define CMD_PRINTENV "fw_printenv"
#define CMD_SETENV "fw_setenv"
static int do_printenv;
static struct option long_options[] = {
{"script", required_argument, NULL, 's'},
{"aes", required_argument, NULL, 'a'},
{"config", required_argument, NULL, 'c'},
{"help", no_argument, NULL, 'h'},
{"script", required_argument, NULL, 's'},
{"noheader", required_argument, NULL, 'n'},
{NULL, 0, NULL, 0}
};
@ -49,36 +53,58 @@ struct common_args common_args;
struct printenv_args printenv_args;
struct setenv_args setenv_args;
void usage(void)
void usage_printenv(void)
{
fprintf(stderr, "fw_printenv/fw_setenv, "
"a command line interface to U-Boot environment\n\n"
#ifndef CONFIG_FILE
"usage:\tfw_printenv [-a key] [-n] [variable name]\n"
"\tfw_setenv [-a key] [variable name] [variable value]\n"
#else
"usage:\tfw_printenv [-c /my/fw_env.config] [-a key] [-n] [variable name]\n"
"\tfw_setenv [-c /my/fw_env.config] [-a key] [variable name] [variable value]\n"
fprintf(stderr,
"Usage: fw_printenv [OPTIONS]... [VARIABLE]...\n"
"Print variables from U-Boot environment\n"
"\n"
" -h, --help print this help.\n"
#ifdef CONFIG_ENV_AES
" -a, --aes aes key to access environment\n"
#endif
"\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"
#ifdef CONFIG_FILE
" -c, --config configuration file, default:" CONFIG_FILE "\n"
#endif
" -n, --noheader do not repeat variable name in output\n"
"\n");
}
void usage_setenv(void)
{
fprintf(stderr,
"Usage: fw_setenv [OPTIONS]... [VARIABLE]...\n"
"Modify variables in U-Boot environment\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"
" -h, --help print this help.\n"
#ifdef CONFIG_ENV_AES
" -a, --aes aes key to access environment\n"
#endif
#ifdef CONFIG_FILE
" -c, --config configuration file, default:" CONFIG_FILE "\n"
#endif
" -s, --script batch mode to minimize writes\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"
);
"Examples:\n"
" fw_setenv foo bar set variable foo equal bar\n"
" fw_setenv foo clear variable foo\n"
" fw_setenv --script file run batch script\n"
"\n"
"Script Syntax:\n"
" key [space] value\n"
" lines starting with '#' are treated as commment\n"
"\n"
" A variable without value will be deleted. Any number of spaces are\n"
" allowed between key and value. Space inside of the value is treated\n"
" as part of the value itself.\n"
"\n"
"Script Example:\n"
" netdev eth0\n"
" kernel_addr 400000\n"
" foo empty empty empty empty empty empty\n"
" bar\n"
"\n");
}
static void parse_common_args(int argc, char *argv[])
@ -105,7 +131,7 @@ static void parse_common_args(int argc, char *argv[])
break;
#endif
case 'h':
usage();
do_printenv ? usage_printenv() : usage_setenv();
exit(EXIT_SUCCESS);
break;
default:
@ -137,7 +163,7 @@ int parse_printenv_args(int argc, char *argv[])
/* ignore common options */
break;
default: /* '?' */
usage();
usage_printenv();
exit(EXIT_FAILURE);
break;
}
@ -163,7 +189,7 @@ int parse_setenv_args(int argc, char *argv[])
/* ignore common options */
break;
default: /* '?' */
usage();
usage_setenv();
exit(EXIT_FAILURE);
break;
}
@ -173,27 +199,34 @@ int parse_setenv_args(int argc, char *argv[])
int main(int argc, char *argv[])
{
char *cmdname = *argv;
const char *lockname = "/var/lock/" CMD_PRINTENV ".lock";
int lockfd = -1;
int retval = EXIT_SUCCESS;
char *_cmdname;
if (strrchr(cmdname, '/') != NULL)
cmdname = strrchr(cmdname, '/') + 1;
_cmdname = *argv;
if (strrchr(_cmdname, '/') != NULL)
_cmdname = strrchr(_cmdname, '/') + 1;
if (strcmp(cmdname, CMD_PRINTENV) == 0) {
if (parse_printenv_args(argc, argv))
exit(EXIT_FAILURE);
} else if (strcmp(cmdname, CMD_SETENV) == 0) {
if (parse_setenv_args(argc, argv))
exit(EXIT_FAILURE);
if (strcmp(_cmdname, CMD_PRINTENV) == 0) {
do_printenv = 1;
} else if (strcmp(_cmdname, CMD_SETENV) == 0) {
do_printenv = 0;
} else {
fprintf(stderr,
"Identity crisis - may be called as `%s' or as `%s' but not as `%s'\n",
CMD_PRINTENV, CMD_SETENV, cmdname);
CMD_PRINTENV, CMD_SETENV, _cmdname);
exit(EXIT_FAILURE);
}
if (do_printenv) {
if (parse_printenv_args(argc, argv))
exit(EXIT_FAILURE);
} else {
if (parse_setenv_args(argc, argv))
exit(EXIT_FAILURE);
}
/* shift parsed flags, jump to non-option arguments */
argc -= optind;
argv += optind;
@ -210,10 +243,10 @@ int main(int argc, char *argv[])
return EXIT_FAILURE;
}
if (strcmp(cmdname, CMD_PRINTENV) == 0) {
if (do_printenv) {
if (fw_printenv(argc, argv) != 0)
retval = EXIT_FAILURE;
} else if (strcmp(cmdname, CMD_SETENV) == 0) {
} else {
if (!setenv_args.script_file) {
if (fw_setenv(argc, argv) != 0)
retval = EXIT_FAILURE;