ngx_get_options
Ubuntu 下 nginx-1.24.0 源码分析 - ngx_get_options函数-CSDN博客
static ngx_int_t
ngx_get_options(int argc, char *const *argv)
{
u_char *p;
ngx_int_t i;
for (i = 1; i < argc; i++) {
p = (u_char *) argv[i];
if (*p++ != '-') {
ngx_log_stderr(0, "invalid option: \"%s\"", argv[i]);
return NGX_ERROR;
}
while (*p) {
switch (*p++) {
case '?':
case 'h':
ngx_show_version = 1;
ngx_show_help = 1;
break;
case 'v':
ngx_show_version = 1;
break;
case 'V':
ngx_show_version = 1;
ngx_show_configure = 1;
break;
case 't':
ngx_test_config = 1;
break;
case 'T':
ngx_test_config = 1;
ngx_dump_config = 1;
break;
case 'q':
ngx_quiet_mode = 1;
break;
case 'p':
if (*p) {
ngx_prefix = p;
goto next;
}
if (argv[++i]) {
ngx_prefix = (u_char *) argv[i];
goto next;
}
ngx_log_stderr(0, "option \"-p\" requires directory name");
return NGX_ERROR;
case 'e':
if (*p) {
ngx_error_log = p;
} else if (argv[++i]) {
ngx_error_log = (u_char *) argv[i];
} else {
ngx_log_stderr(0, "option \"-e\" requires file name");
return NGX_ERROR;
}
if (ngx_strcmp(ngx_error_log, "stderr") == 0) {
ngx_error_log = (u_char *) "";
}
goto next;
case 'c':
if (*p) {
ngx_conf_file = p;
goto next;
}
if (argv[++i]) {
ngx_conf_file = (u_char *) argv[i];
goto next;
}
ngx_log_stderr(0, "option \"-c\" requires file name");
return NGX_ERROR;
case 'g':
if (*p) {
ngx_conf_params = p;
goto next;
}
if (argv[++i]) {
ngx_conf_params = (u_char *) argv[i];
goto next;
}
ngx_log_stderr(0, "option \"-g\" requires parameter");
return NGX_ERROR;
case 's':
if (*p) {
ngx_signal = (char *) p;
} else if (argv[++i]) {
ngx_signal = argv[i];
} else {
ngx_log_stderr(0, "option \"-s\" requires parameter");
return NGX_ERROR;
}
if (ngx_strcmp(ngx_signal, "stop") == 0
|| ngx_strcmp(ngx_signal, "quit") == 0
|| ngx_strcmp(ngx_signal, "reopen") == 0
|| ngx_strcmp(ngx_signal, "reload") == 0)
{
ngx_process = NGX_PROCESS_SIGNALLER;
goto next;
}
ngx_log_stderr(0, "invalid option: \"-s %s\"", ngx_signal);
return NGX_ERROR;
default:
ngx_log_stderr(0, "invalid option: \"%c\"", *(p - 1));
return NGX_ERROR;
}
}
next:
continue;
}
return NGX_OK;
}static ngx_int_t
ngx_get_options(int argc, char *const *argv)
{
u_char *p;
ngx_int_t i;
for (i = 1; i < argc; i++) {
p = (u_char *) argv[i];
if (*p++ != '-') {
ngx_log_stderr(0, "invalid option: \"%s\"", argv[i]);
return NGX_ERROR;
}
while (*p) {
switch (*p++) {
case '?':
case 'h':
ngx_show_version = 1;
ngx_show_help = 1;
break;
case 'v':
ngx_show_version = 1;
break;
case 'V':
ngx_show_version = 1;
ngx_show_configure = 1;
break;
case 't':
ngx_test_config = 1;
break;
case 'T':
ngx_test_config = 1;
ngx_dump_config = 1;
break;
case 'q':
ngx_quiet_mode = 1;
break;
case 'p':
if (*p) {
ngx_prefix = p;
goto next;
}
if (argv[++i]) {
ngx_prefix = (u_char *) argv[i];
goto next;
}
ngx_log_stderr(0, "option \"-p\" requires directory name");
return NGX_ERROR;
case 'e':
if (*p) {
ngx_error_log = p;
} else if (argv[++i]) {
ngx_error_log = (u_char *) argv[i];
} else {
ngx_log_stderr(0, "option \"-e\" requires file name");
return NGX_ERROR;
}
if (ngx_strcmp(ngx_error_log, "stderr") == 0) {
ngx_error_log = (u_char *) "";
}
goto next;
case 'c':
if (*p) {
ngx_conf_file = p;
goto next;
}
if (argv[++i]) {
ngx_conf_file = (u_char *) argv[i];
goto next;
}
ngx_log_stderr(0, "option \"-c\" requires file name");
return NGX_ERROR;
case 'g':
if (*p) {
ngx_conf_params = p;
goto next;
}
if (argv[++i]) {
ngx_conf_params = (u_char *) argv[i];
goto next;
}
ngx_log_stderr(0, "option \"-g\" requires parameter");
return NGX_ERROR;
case 's':
if (*p) {
ngx_signal = (char *) p;
} else if (argv[++i]) {
ngx_signal = argv[i];
} else {
ngx_log_stderr(0, "option \"-s\" requires parameter");
return NGX_ERROR;
}
if (ngx_strcmp(ngx_signal, "stop") == 0
|| ngx_strcmp(ngx_signal, "quit") == 0
|| ngx_strcmp(ngx_signal, "reopen") == 0
|| ngx_strcmp(ngx_signal, "reload") == 0)
{
ngx_process = NGX_PROCESS_SIGNALLER;
goto next;
}
ngx_log_stderr(0, "invalid option: \"-s %s\"", ngx_signal);
return NGX_ERROR;
default:
ngx_log_stderr(0, "invalid option: \"%c\"", *(p - 1));
return NGX_ERROR;
}
}
next:
continue;
}
循环，从 1 开始，argv[0] 是程序名
此时
argc=1
因为此次执行的是
sudo ./nginx
只有程序名
所以条件不成立
return NGX_OK;返回 NGX_OK