u-boot/cmd/nvedit.c

13  * Support for persistent environment data
15  * The "environment" is stored on external storage as a list of '\0'
17  * a double '\0'. The environment is preceded by a 32 bit CRC over
18  * the data part and, in case of redundant environment, a byte of
23  * environment. After that, we use a hash table.
30 #include <environment.h>
66  * be used via get_env_id() as an indication, if the environment
67  * has changed or not. So it is possible to reread an environment
68  * variable only if the environment was changed ... done so for
80  * Command interface: print one or all environment variables
111 	printf("## Error: cannot export environment\n");  in env_print()
214  * Set a new environment variable,
310  * Set an environment variable to an integer value
312  * @param varname	Environment variable to set
325  * Set an environment variable to an value in hex
327  * @param varname	Environment variable to set
394  * Prompt for environment variable
622  * Interactively edit an environment variable
663  * Look up variable from environment,
689  * Look up variable from environment for restricted C runtime env.
732  * Decode the integer value of an environment variable and return it.
734  * @param name		Name of environment variable
744 	 * environment variable value is an integer and thus short.  in env_get_ulong()
761 	"save environment variables to persistent storage",
772  * i2 is the environment index for a 'name2=value2' pair.
815 		/* Reset the whole environment */  in do_env_default()
816 		set_default_env("## Resetting to default environment\n",  in do_env_default()
874  *	-c:	export as checksum protected environment format as
878  *	addr:	memory address where environment gets stored
880  *		export. Without arguments, the whole environment gets
887  * environment, a "current" redundancy flag. If size is given, this
974 			pr_err("## Error: Cannot export environment: errno = %d\n",  in do_env_export()
995 		pr_err("## Error: Cannot export environment: errno = %d\n",  in do_env_export()
1021  *	-d:	delete existing environment before importing if no var is
1023  *		environment but not in the environment at addr, delete var from
1024  *		current environment;
1033  *	-c:	assume checksum protected environment format
1040  *		the environment at address 'addr'. Without arguments, the whole
1041  *		environment gets imported.
1145 		pr_err("## Error: Environment import failed: errno = %d\n",  in do_env_import()
1246 	"ask name [message] [size] - ask for environment variable\nenv "
1251 	"default [-f] -a - [forcibly] reset default environment\n"
1255 	"env edit name - edit environment variable\n"
1261 	"env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
1268 	"env grep [-e] [-n | -v | -b] string [...] - search environment\n"
1270 	"env grep [-n | -v | -b] string [...] - search environment\n"
1274 	"env import [-d] [-t [-r] | -b | -c] addr [size] [var ...] - import environment\n"
1276 	"env print [-a | name ...] - print environment\n"
1278 	"env print -e [name ...] - print UEFI environment\n"
1281 	"env run var [...] - run commands in an environment variable\n"
1284 	"env save - save environment\n"
1294 	"environment handling commands", env_help_text
1304 	"edit environment variable",
1306 	"    - edit environment variable 'name'",
1313 	"print environment variables",
1314 	"[-a]\n    - print [all] values of all environment variables\n"
1320 	"    - print value of environment variable 'name'",
1327 	"search environment variables",
1333 	"    - list environment name=value pairs matching 'string'\n"
1345 	"set environment variables",
1352 	"    - [forcibly] set environment variable 'name' to 'value ...'\n"
1354 	"    - [forcibly] delete environment variable 'name'",
1362 	"get environment variables from stdin",
1364 	"    - get environment variable 'name' from stdin (max 'size' chars)"
1371 	"run commands in an environment variable",
1373 	"    - run the commands in the environment variable(s) 'var'",