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-rw-r--r--cmd/nvedit.c26
1 files changed, 19 insertions, 7 deletions
diff --git a/cmd/nvedit.c b/cmd/nvedit.c
index 87c2a86..793b68b 100644
--- a/cmd/nvedit.c
+++ b/cmd/nvedit.c
@@ -1005,8 +1005,11 @@ sep_err:
#ifdef CONFIG_CMD_IMPORTENV
/*
- * env import [-d] [-t [-r] | -b | -c] addr [size]
- * -d: delete existing environment before importing;
+ * env import [-d] [-t [-r] | -b | -c] addr [size] [var ...]
+ * -d: delete existing environment before importing if no var is
+ * passed; if vars are passed, if one var is in the current
+ * environment but not in the environment at addr, delete var from
+ * current environment;
* otherwise overwrite / append to existing definitions
* -t: assume text format; either "size" must be given or the
* text data must be '\0' terminated
@@ -1019,6 +1022,11 @@ sep_err:
* addr: memory address to read from
* size: length of input data; if missing, proper '\0'
* termination is mandatory
+ * if var is set and size should be missing (i.e. '\0'
+ * termination), set size to '-'
+ * var... List of the names of the only variables that get imported from
+ * the environment at address 'addr'. Without arguments, the whole
+ * environment gets imported.
*/
static int do_env_import(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
@@ -1030,6 +1038,7 @@ static int do_env_import(cmd_tbl_t *cmdtp, int flag,
int fmt = 0;
int del = 0;
int crlf_is_lf = 0;
+ int wl = 0;
size_t size;
cmd = *argv;
@@ -1078,9 +1087,9 @@ static int do_env_import(cmd_tbl_t *cmdtp, int flag,
addr = simple_strtoul(argv[0], NULL, 16);
ptr = map_sysmem(addr, 0);
- if (argc == 2) {
+ if (argc >= 2 && strcmp(argv[1], "-")) {
size = simple_strtoul(argv[1], NULL, 16);
- } else if (argc == 1 && chk) {
+ } else if (chk) {
puts("## Error: external checksum format must pass size\n");
return CMD_RET_FAILURE;
} else {
@@ -1102,6 +1111,9 @@ static int do_env_import(cmd_tbl_t *cmdtp, int flag,
printf("## Info: input data size = %zu = 0x%zX\n", size, size);
}
+ if (argc > 2)
+ wl = 1;
+
if (chk) {
uint32_t crc;
env_t *ep = (env_t *)ptr;
@@ -1116,8 +1128,8 @@ static int do_env_import(cmd_tbl_t *cmdtp, int flag,
ptr = (char *)ep->data;
}
- if (himport_r(&env_htab, ptr, size, sep, del ? 0 : H_NOCLEAR,
- crlf_is_lf, 0, NULL) == 0) {
+ if (!himport_r(&env_htab, ptr, size, sep, del ? 0 : H_NOCLEAR,
+ crlf_is_lf, wl ? argc - 2 : 0, wl ? &argv[2] : NULL)) {
pr_err("## Error: Environment import failed: errno = %d\n",
errno);
return 1;
@@ -1247,7 +1259,7 @@ static char env_help_text[] =
#endif
#endif
#if defined(CONFIG_CMD_IMPORTENV)
- "env import [-d] [-t [-r] | -b | -c] addr [size] - import environment\n"
+ "env import [-d] [-t [-r] | -b | -c] addr [size] [var ...] - import environment\n"
#endif
"env print [-a | name ...] - print environment\n"
#if defined(CONFIG_CMD_RUN)