我想获取此命令的选项:
my_cmd show --value true -D
为此，我需要通过选项两次(由于架构)。在第二遍期间，无法正确检索与其选项对应的参数。
在此示例中，在第二次传递期间检索到的参数(对于选项 --value)是 -D 而不是 true。
第一关:
void getoptions (int argc, char **argv, globalargs_t* globalargs) {
static const char *optstring = "vDqnd:c:f:o:h?:";
static const struct option longopts[] = {
{ "help", no_argument, NULL, 'h' },
{ "Debug", no_argument, NULL, 'D'},
{ "verbose", no_argument, NULL, 'v'},
{ "quiet", no_argument, NULL, 'q'},
{ "noheader", no_argument, NULL, 0},
{ "delimiter", required_argument, NULL, 0},
{ "columns", required_argument, NULL, 0},
{ "filter", required_argument, NULL, 0},
{ "order", required_argument, NULL, 0},
{ "getid", no_argument, NULL, 'i'},
{ NULL, no_argument, NULL, 0 }
};
int opt = 0;
int longindex = 0;
//opterr = 0;
/* Process the arguments with getopt_long(), then populate globalargs-> */
opt = getopt_long( argc, argv, optstring, longopts, &longindex );
while( opt != -1 ) {
switch( opt ) {
case '?':
break;
case 'D':
globalargs->debug = 1; /* true */
break;
case 'v':
globalargs->verbose++;
break;
case 'q':
globalargs->quiet = 1;
break;
case 'i':
globalargs->id = 1;
break;
case 'h':
globalargs->help = 1;
break;
case 0: /* long option without a short arg */
if( strcmp( "Debug", longopts[longindex].name ) == 0 ) {
globalargs->debug = 1;
}
if( strcmp( "verbose", longopts[longindex].name ) == 0 ) {
globalargs->verbose = 1;
}
if( strcmp( "quiet", longopts[longindex].name ) == 0 ) {
globalargs->quiet = 1;
}
if( strcmp( "noheader", longopts[longindex].name ) == 0 ) {
globalargs->noheader = 1;
}
if( strcmp( "delimiter", longopts[longindex].name ) == 0 ) {
globalargs->delimiter = *optarg;
}
if( strcmp( "filter", longopts[longindex].name ) == 0 ) {
globalargs->filter = optarg;
}
if( strcmp( "order", longopts[longindex].name ) == 0 ) {
globalargs->order = optarg;
}
if( strcmp( "columns", longopts[longindex].name ) == 0 ) {
globalargs->columns = optarg;
}
break;
default:
/* You won't actually get here. */
break;
}
opt = getopt_long( argc, argv, optstring, longopts, &longindex );
}
if (optind < argc) {
while (optind < argc) {
globalargs->actions[globalargs->actionsindex] = argv[optind++];
globalargs->actionsindex++;
}
}
}
第二遍:
void getspecificoptions(int argc, char **argv, globalargs_t* globalargs) {
static const char *optstring = ":n:d:v:d";
static const struct option longopts[] = {
{ "name", required_argument, NULL, 'n'},
{ "domain", required_argument, NULL, 0},
{ "value", required_argument, NULL, 0},
{ "defined_value", required_argument, NULL, 0},
{ NULL, no_argument, NULL, 0 }
};
optind = 1;
int opt = 0;
int longindex = 0;
/* Process the arguments with getopt_long(), then populate globalargs-> */
opt = getopt_long( argc, argv, optstring, longopts, &longindex );
while( opt != -1 ) {
switch( opt ) {
case 'n':
/* If used in update/add => must be still a filter */
globalargs->filter = strcat(globalargs->filter,"cluster.name=");
globalargs->filter = strcat(globalargs->filter, optarg);
if(!globalargs->table || strcmp(globalargs->table, "cluster") == 0 ) {
globalargs->table = "cluster";
}
else {
clmError(&t, "dbm-command", -1, "Incompatible options.");
exit(EXIT_FAILURE_OPTIONS);
}
break;
case 0: /* long option without a short arg */
if( strcmp( "domain", longopts[longindex].name ) == 0 ) {
}
else {
char* f = my_new(500*sizeof(char));
f = strcat(f, "cluster.dns_domain=");
f = strcat(f, optarg);
globalargs->actions[globalargs->actionsindex] = f;
globalargs->actionsindex++;
}
if(strcmp(globalargs->table,"") == 0 || strcmp(globalargs->table, "cluster") == 0 ) {
globalargs->table = "cluster";
}
else {
clmError(&t, "dbm-command", -1, "Incompatible options.");
exit(EXIT_FAILURE_OPTIONS);
}
}
if( strcmp( "value", longopts[longindex].name ) == 0 ) {
if(strcmp(globalargs->actions[0], "show") == 0 || strcmp(globalargs->actions[0], "delete") == 0 ) {
globalargs->filter = realloc(globalargs->filter, strlen(globalargs->filter) + strlen(optarg) + strlen("cluster_profile.value=") + 1);
globalargs->filter = strcat(globalargs->filter,"cluster_profile.value=");
globalargs->filter = strcat(globalargs->filter, optarg);
}
else {
char* act = my_new(strlen(optarg) + strlen("cluster_profile.value=") + 1U);
act = strcat(act, "cluster_profile.value=");
act = strcat(act, optarg);
globalargs->actions[globalargs->actionsindex] = act;
globalargs->actionsindex++;
}
if(strcmp(globalargs->table,"") == 0 || strcmp(globalargs->table, "profile") == 0 ) {
globalargs->table = "profile";
}
else {
clmError(&t, "dbm-command", -1, "Incompatible options.");
exit(EXIT_FAILURE_OPTIONS);
}
}
if( strcmp( "defined_value", longopts[longindex].name ) == 0 ) {
/* If used in update/add => must be still a filter */
globalargs->filter = strcat(globalargs->filter,"cluster_profile.defined_value=");
globalargs->filter = strcat(globalargs->filter, optarg);
if(!globalargs->table || strcmp(globalargs->table, "profile") == 0 ) {
globalargs->table = "profile";
}
else {
clmError(&t, "dbm-command", -1, "Incompatible options.");
exit(EXIT_FAILURE_OPTIONS);
}
}
break;
}
opt = getopt_long( argc, argv, optstring, longopts, &longindex );
}
}
在这些传递之后，我有 globalargs->filter="-D"。
如有任何帮助，我们将不胜感激。
谢谢!
最佳答案
必须将 optind 重置为 0 而不是 1。第一次通过时，限定标志被解析，但第二次则没有，因为 optind 是 1 而不是 0。将其设置为 0 会重新解析字符串。
optstring 的第一个字符也必须是 + 或 -(在前导冒号之前)以防止参数被重新排序。
这一切都假设您使用的是 GNU 的 getopt_long。
关于C Getopt : Wrong argument corresponding to its option，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/11867636/