u-boot/cmd/nvedit.c

14  * Support for persistent environment data
16  * The "environment" is stored on external storage as a list of '\0'
18  * a double '\0'. The environment is preceded by a 32 bit CRC over
19  * the data part and, in case of redundant environment, a byte of
24  * environment. After that, we use a hash table.
31 #include <environment.h>
68  * be used via get_env_id() as an indication, if the environment
69  * has changed or not. So it is possible to reread an environment
70  * variable only if the environment was changed ... done so for
82  * Command interface: print one or all environment variables
113 	printf("## Error: cannot export environment\n");  in env_print()
211  * Set a new environment variable,
688  * Set an environment variable to an integer value
690  * @param varname	Environment variable to set
703  * Set an environment variable to an value in hex
705  * @param varname	Environment variable to set
742  * Prompt for environment variable
970  * Interactively edit an environment variable
1011  * Look up variable from environment,
1037  * Look up variable from environment for restricted C runtime env.
1075  * Decode the integer value of an environment variable and return it.
1087 	 * environment variable value is an integer and thus short.  in env_get_ulong()
1101 	printf("Saving Environment to %s...\n", env->name);  in do_env_save()
1108 	"save environment variables to persistent storage",
1119  * i2 is the environment index for a 'name2=value2' pair.
1162 		/* Reset the whole environment */  in do_env_default()
1163 		set_default_env("## Resetting to default environment\n");  in do_env_default()
1229  *	-c:	export as checksum protected environment format as
1233  *	addr:	memory address where environment gets stored
1235  *		export. Without arguments, the whole environment gets
1242  * environment, a "current" redundancy flag. If size is given, this
1329 			pr_err("Cannot export environment: errno = %d\n", errno);  in do_env_export()
1349 		pr_err("Cannot export environment: errno = %d\n", errno);  in do_env_export()
1372  *	-d:	delete existing environment before importing;
1381  *	-c:	assume checksum protected environment format
1484 		pr_err("Environment import failed: errno = %d\n", errno);  in do_env_import()
1585 	"ask name [message] [size] - ask for environment variable\nenv "
1590 	"default [-f] -a - [forcibly] reset default environment\n"
1595 	"env edit name - edit environment variable\n"
1601 	"env export [-t | -b | -c] [-s size] addr [var ...] - export environment\n"
1608 	"env grep [-e] [-n | -v | -b] string [...] - search environment\n"
1610 	"env grep [-n | -v | -b] string [...] - search environment\n"
1614 	"env import [-d] [-t [-r] | -b | -c] addr [size] - import environment\n"
1616 	"env print [-a | name ...] - print environment\n"
1618 	"env run var [...] - run commands in an environment variable\n"
1621 	"env save - save environment\n"
1628 	"environment handling commands", env_help_text
1638 	"edit environment variable",
1640 	"    - edit environment variable 'name'",
1647 	"print environment variables",
1648 	"[-a]\n    - print [all] values of all environment variables\n"
1650 	"    - print value of environment variable 'name'",
1657 	"search environment variables",
1663 	"    - list environment name=value pairs matching 'string'\n"
1675 	"set environment variables",
1677 	"    - [forcibly] set environment variable 'name' to 'value ...'\n"
1679 	"    - [forcibly] delete environment variable 'name'",
1687 	"get environment variables from stdin",
1689 	"    - get environment variable 'name' from stdin (max 'size' chars)"
1696 	"run commands in an environment variable",
1698 	"    - run the commands in the environment variable(s) 'var'",