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env: tool: add command line option to input lockfile path

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The default lockname is set to /var/lock. This limits the
usage of this application where OS uses different lockfile
location parameter.
For example, In case of android, the default lock
path location is /data.
Hence by providing the command line option to input lockfile
path will be useful to reuse the tool across multiple
operating system.

usage: ./fw_printenv -l <lockfile path>

Signed-off-by: Ravi Babu <ravibabu@ti.com>
This commit is contained in:
B, Ravi 2016-09-26 18:24:08 +05:30 committed by Tom Rini
parent 279dcd8975
commit d40dbfb740
2 changed files with 30 additions and 6 deletions
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1
tools/env/fw_env.h vendored
View file

@ -63,6 +63,7 @@ struct env_opts {
#endif
int aes_flag; /* Is AES encryption used? */
uint8_t aes_key[AES_KEY_LENGTH];
char *lockname;
};
int parse_aes_key(char *key, uint8_t *bin_key);

35
tools/env/fw_env_main.c vendored
View file

@ -46,6 +46,7 @@ static struct option long_options[] = {
{"help", no_argument, NULL, 'h'},
{"script", required_argument, NULL, 's'},
{"noheader", required_argument, NULL, 'n'},
{"lock", required_argument, NULL, 'l'},
{NULL, 0, NULL, 0}
};
@ -72,6 +73,7 @@ void usage_printenv(void)
" -c, --config configuration file, default:" CONFIG_FILE "\n"
#endif
" -n, --noheader do not repeat variable name in output\n"
" -l, --lock lock node, default:/var/lock\n"
"\n");
}
@ -88,6 +90,7 @@ void usage_setenv(void)
#ifdef CONFIG_FILE
" -c, --config configuration file, default:" CONFIG_FILE "\n"
#endif
" -l, --lock lock node, default:/var/lock\n"
" -s, --script batch mode to minimize writes\n"
"\n"
"Examples:\n"
@ -119,7 +122,7 @@ static void parse_common_args(int argc, char *argv[])
env_opts.config_file = CONFIG_FILE;
#endif
while ((c = getopt_long(argc, argv, ":a:c:h", long_options, NULL)) !=
while ((c = getopt_long(argc, argv, ":a:c:l:h", long_options, NULL)) !=
EOF) {
switch (c) {
case 'a':
@ -134,6 +137,9 @@ static void parse_common_args(int argc, char *argv[])
env_opts.config_file = optarg;
break;
#endif
case 'l':
env_opts.lockname = optarg;
break;
case 'h':
do_printenv ? usage_printenv() : usage_setenv();
exit(EXIT_SUCCESS);
@ -155,8 +161,8 @@ int parse_printenv_args(int argc, char *argv[])
parse_common_args(argc, argv);
while ((c = getopt_long(argc, argv, "a:c:ns:h", long_options, NULL)) !=
EOF) {
while ((c = getopt_long(argc, argv, "a:c:ns:l:h", long_options, NULL))
!= EOF) {
switch (c) {
case 'n':
noheader = 1;
@ -164,6 +170,7 @@ int parse_printenv_args(int argc, char *argv[])
case 'a':
case 'c':
case 'h':
case 'l':
/* ignore common options */
break;
default: /* '?' */
@ -181,8 +188,8 @@ int parse_setenv_args(int argc, char *argv[])
parse_common_args(argc, argv);
while ((c = getopt_long(argc, argv, "a:c:ns:h", long_options, NULL)) !=
EOF) {
while ((c = getopt_long(argc, argv, "a:c:ns:l:h", long_options, NULL))
!= EOF) {
switch (c) {
case 's':
script_file = optarg;
@ -190,6 +197,7 @@ int parse_setenv_args(int argc, char *argv[])
case 'a':
case 'c':
case 'h':
case 'l':
/* ignore common options */
break;
default: /* '?' */
@ -203,7 +211,7 @@ int parse_setenv_args(int argc, char *argv[])
int main(int argc, char *argv[])
{
const char *lockname = "/var/lock/" CMD_PRINTENV ".lock";
char *lockname = "/var/lock/" CMD_PRINTENV ".lock";
int lockfd = -1;
int retval = EXIT_SUCCESS;
char *_cmdname;
@ -235,6 +243,18 @@ int main(int argc, char *argv[])
argc -= optind;
argv += optind;
if (env_opts.lockname) {
lockname = malloc(sizeof(env_opts.lockname) +
sizeof(CMD_PRINTENV) + 10);
if (!lockname) {
fprintf(stderr, "Unable allocate memory");
exit(EXIT_FAILURE);
}
sprintf(lockname, "%s/%s.lock",
env_opts.lockname, CMD_PRINTENV);
}
lockfd = open(lockname, O_WRONLY | O_CREAT | O_TRUNC, 0666);
if (-1 == lockfd) {
fprintf(stderr, "Error opening lock file %s\n", lockname);
@ -260,6 +280,9 @@ int main(int argc, char *argv[])
}
}
if (env_opts.lockname)
free(lockname);
flock(lockfd, LOCK_UN);
close(lockfd);
return retval;