openocd: fix SPDX tag format for files .c
[openocd.git] / src / helper / options.c
index bbd071fd8191c96c1e88e09718b6c8fd7763ac85..327c418d0db9fa5b2d37f7d7b86f8aae8e718593 100644 (file)
@@ -1,24 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
 /***************************************************************************
  *   Copyright (C) 2004, 2005 by Dominic Rath                              *
  *   Dominic.Rath@gmx.de                                                   *
  *                                                                         *
  *   Copyright (C) 2007-2010 Ã˜yvind Harboe                                 *
  *   oyvind.harboe@zylin.com                                               *
- *                                                                         *
- *   This program is free software; you can redistribute it and/or modify  *
- *   it under the terms of the GNU General Public License as published by  *
- *   the Free Software Foundation; either version 2 of the License, or     *
- *   (at your option) any later version.                                   *
- *                                                                         *
- *   This program is distributed in the hope that it will be useful,       *
- *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
- *   GNU General Public License for more details.                          *
- *                                                                         *
- *   You should have received a copy of the GNU General Public License     *
- *   along with this program; if not, write to the                         *
- *   Free Software Foundation, Inc.,                                       *
- *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
  ***************************************************************************/
 
 #ifdef HAVE_CONFIG_H
 
 #include <getopt.h>
 
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+#if IS_DARWIN
+#include <libproc.h>
+#endif
+/* sys/sysctl.h is deprecated on Linux from glibc 2.30 */
+#ifndef __linux__
+#ifdef HAVE_SYS_SYSCTL_H
+#include <sys/sysctl.h>
+#endif
+#endif
+#if IS_WIN32 && !IS_CYGWIN
+#include <windows.h>
+#endif
+
 static int help_flag, version_flag;
 
 static const struct option long_options[] = {
@@ -41,7 +44,6 @@ static const struct option long_options[] = {
        {"search",              required_argument,              0,                              's'},
        {"log_output",  required_argument,              0,                              'l'},
        {"command",             required_argument,              0,                              'c'},
-       {"pipe",                no_argument,                    0,                              'p'},
        {0, 0, 0, 0}
 };
 
@@ -52,90 +54,212 @@ int configuration_output_handler(struct command_context *context, const char *li
        return ERROR_OK;
 }
 
-#ifdef _WIN32
-static char *find_suffix(const char *text, const char *suffix)
+/* Return the canonical path to the directory the openocd executable is in.
+ * The path should be absolute, use / as path separator and have all symlinks
+ * resolved. The returned string is malloc'd. */
+static char *find_exe_path(void)
 {
-       size_t text_len = strlen(text);
-       size_t suffix_len = strlen(suffix);
+       char *exepath = NULL;
 
-       if (suffix_len == 0)
-               return (char *)text + text_len;
+       do {
+#if IS_WIN32 && !IS_CYGWIN
+               exepath = malloc(MAX_PATH);
+               if (!exepath)
+                       break;
+               GetModuleFileName(NULL, exepath, MAX_PATH);
 
-       if (suffix_len > text_len || strncmp(text + text_len - suffix_len, suffix, suffix_len) != 0)
-               return NULL; /* Not a suffix of text */
+               /* Convert path separators to UNIX style, should work on Windows also. */
+               for (char *p = exepath; *p; p++) {
+                       if (*p == '\\')
+                               *p = '/';
+               }
 
-       return (char *)text + text_len - suffix_len;
-}
+#elif IS_DARWIN
+               exepath = malloc(PROC_PIDPATHINFO_MAXSIZE);
+               if (!exepath)
+                       break;
+               if (proc_pidpath(getpid(), exepath, PROC_PIDPATHINFO_MAXSIZE) <= 0) {
+                       free(exepath);
+                       exepath = NULL;
+               }
+
+#elif defined(CTL_KERN) && defined(KERN_PROC) && defined(KERN_PROC_PATHNAME) /* *BSD */
+#ifndef PATH_MAX
+#define PATH_MAX 1024
 #endif
+               char *path = malloc(PATH_MAX);
+               if (!path)
+                       break;
+               int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 };
+               size_t size = PATH_MAX;
 
-static void add_default_dirs(void)
-{
-       const char *run_prefix;
-       char *path;
+               if (sysctl(mib, (u_int)ARRAY_SIZE(mib), path, &size, NULL, 0) != 0)
+                       break;
+
+#ifdef HAVE_REALPATH
+               exepath = realpath(path, NULL);
+               free(path);
+#else
+               exepath = path;
+#endif
+
+#elif defined(HAVE_REALPATH) /* Assume POSIX.1-2008 */
+               /* Try Unices in order of likelihood. */
+               exepath = realpath("/proc/self/exe", NULL); /* Linux/Cygwin */
+               if (!exepath)
+                       exepath = realpath("/proc/self/path/a.out", NULL); /* Solaris */
+               if (!exepath)
+                       exepath = realpath("/proc/curproc/file", NULL); /* FreeBSD (Should be covered above) */
+#endif
+       } while (0);
+
+       if (exepath) {
+               /* Strip executable file name, leaving path */
+               *strrchr(exepath, '/') = '\0';
+       } else {
+               LOG_WARNING("Could not determine executable path, using configured BINDIR.");
+               LOG_DEBUG("BINDIR = %s", BINDIR);
+#ifdef HAVE_REALPATH
+               exepath = realpath(BINDIR, NULL);
+#else
+               exepath = strdup(BINDIR);
+#endif
+       }
 
-#ifdef _WIN32
-       char strExePath[MAX_PATH];
-       GetModuleFileName(NULL, strExePath, MAX_PATH);
+       return exepath;
+}
 
-       /* Strip executable file name, leaving path */
-       *strrchr(strExePath, '\\') = '\0';
+static char *find_relative_path(const char *from, const char *to)
+{
+       size_t i;
 
-       /* Convert path separators to UNIX style, should work on Windows also. */
-       for (char *p = strExePath; *p; p++) {
-               if (*p == '\\')
-                       *p = '/';
+       /* Skip common /-separated parts of from and to */
+       i = 0;
+       for (size_t n = 0; from[n] == to[n]; n++) {
+               if (from[n] == '\0') {
+                       i = n;
+                       break;
+               }
+               if (from[n] == '/')
+                       i = n + 1;
+       }
+       from += i;
+       to += i;
+
+       /* Count number of /-separated non-empty parts of from */
+       i = 0;
+       while (from[0] != '\0') {
+               if (from[0] != '/')
+                       i++;
+               char *next = strchr(from, '/');
+               if (!next)
+                       break;
+               from = next + 1;
        }
 
-       char *end_of_prefix = find_suffix(strExePath, BINDIR);
-       if (end_of_prefix != NULL)
-               *end_of_prefix = '\0';
+       /* Prepend that number of ../ in front of to */
+       char *relpath = malloc(i * 3 + strlen(to) + 1);
+       relpath[0] = '\0';
+       for (size_t n = 0; n < i; n++)
+               strcat(relpath, "../");
+       strcat(relpath, to);
 
-       run_prefix = strExePath;
-#else
-       run_prefix = "";
-#endif
+       return relpath;
+}
 
-       LOG_DEBUG("bindir=%s", BINDIR);
-       LOG_DEBUG("pkgdatadir=%s", PKGDATADIR);
-       LOG_DEBUG("run_prefix=%s", run_prefix);
+static void add_user_dirs(void)
+{
+       char *path;
 
-       /*
-        * The directory containing OpenOCD-supplied scripts should be
-        * listed last in the built-in search order, so the user can
-        * override these scripts with site-specific customizations.
-        */
-       const char *home = getenv("HOME");
+#if IS_WIN32
+       const char *appdata = getenv("APPDATA");
 
-       if (home) {
-               path = alloc_printf("%s/.openocd", home);
+       if (appdata) {
+               path = alloc_printf("%s/OpenOCD", appdata);
                if (path) {
+                       /* Convert path separators to UNIX style, should work on Windows also. */
+                       for (char *p = path; *p; p++) {
+                               if (*p == '\\')
+                                       *p = '/';
+                       }
                        add_script_search_dir(path);
                        free(path);
                }
        }
-#ifdef _WIN32
-       const char *appdata = getenv("APPDATA");
+       /* WIN32 may also have HOME defined, particularly under Cygwin, so add those paths below too */
+#endif
 
-       if (appdata) {
-               path = alloc_printf("%s/OpenOCD", appdata);
+       const char *home = getenv("HOME");
+#if IS_DARWIN
+       if (home) {
+               path = alloc_printf("%s/Library/Preferences/org.openocd", home);
                if (path) {
                        add_script_search_dir(path);
                        free(path);
                }
        }
 #endif
+       const char *xdg_config = getenv("XDG_CONFIG_HOME");
+
+       if (xdg_config) {
+               path = alloc_printf("%s/openocd", xdg_config);
+               if (path) {
+                       add_script_search_dir(path);
+                       free(path);
+               }
+       } else if (home) {
+               path = alloc_printf("%s/.config/openocd", home);
+               if (path) {
+                       add_script_search_dir(path);
+                       free(path);
+               }
+       }
+
+       if (home) {
+               path = alloc_printf("%s/.openocd", home);
+               if (path) {
+                       add_script_search_dir(path);
+                       free(path);
+               }
+       }
+}
 
-       path = alloc_printf("%s%s%s", run_prefix, PKGDATADIR, "/site");
+static void add_default_dirs(void)
+{
+       char *path;
+       char *exepath = find_exe_path();
+       char *bin2data = find_relative_path(BINDIR, PKGDATADIR);
+
+       LOG_DEBUG("bindir=%s", BINDIR);
+       LOG_DEBUG("pkgdatadir=%s", PKGDATADIR);
+       LOG_DEBUG("exepath=%s", exepath);
+       LOG_DEBUG("bin2data=%s", bin2data);
+
+       /*
+        * The directory containing OpenOCD-supplied scripts should be
+        * listed last in the built-in search order, so the user can
+        * override these scripts with site-specific customizations.
+        */
+       path = getenv("OPENOCD_SCRIPTS");
+       if (path)
+               add_script_search_dir(path);
+
+       add_user_dirs();
+
+       path = alloc_printf("%s/%s/%s", exepath, bin2data, "site");
        if (path) {
                add_script_search_dir(path);
                free(path);
        }
 
-       path = alloc_printf("%s%s%s", run_prefix, PKGDATADIR, "/scripts");
+       path = alloc_printf("%s/%s/%s", exepath, bin2data, "scripts");
        if (path) {
                add_script_search_dir(path);
                free(path);
        }
+
+       free(exepath);
+       free(bin2data);
 }
 
 int parse_cmdline_args(struct command_context *cmd_ctx, int argc, char *argv[])
@@ -146,7 +270,7 @@ int parse_cmdline_args(struct command_context *cmd_ctx, int argc, char *argv[])
                /* getopt_long stores the option index here. */
                int option_index = 0;
 
-               c = getopt_long(argc, argv, "hvd::l:f:s:c:p", long_options, &option_index);
+               c = getopt_long(argc, argv, "hvd::l:f:s:c:", long_options, &option_index);
 
                /* Detect the end of the options. */
                if (c == -1)
@@ -173,39 +297,39 @@ int parse_cmdline_args(struct command_context *cmd_ctx, int argc, char *argv[])
                                break;
                        case 'd':               /* --debug | -d */
                        {
-                               char *command = alloc_printf("debug_level %s", optarg ? optarg : "3");
-                               command_run_line(cmd_ctx, command);
-                               free(command);
+                               int retval = command_run_linef(cmd_ctx, "debug_level %s", optarg ? optarg : "3");
+                               if (retval != ERROR_OK)
+                                       return retval;
                                break;
                        }
                        case 'l':               /* --log_output | -l */
-                               if (optarg) {
-                                       char *command = alloc_printf("log_output %s", optarg);
-                                       command_run_line(cmd_ctx, command);
-                                       free(command);
-                               }
+                               if (optarg)
+                                       command_run_linef(cmd_ctx, "log_output %s", optarg);
                                break;
                        case 'c':               /* --command | -c */
                                if (optarg)
                                    add_config_command(optarg);
                                break;
-                       case 'p':
-                               /* to replicate the old syntax this needs to be synchronous
-                                * otherwise the gdb stdin will overflow with the warning message */
-                               command_run_line(cmd_ctx, "gdb_port pipe; log_output openocd.log");
-                               LOG_WARNING("deprecated option: -p/--pipe. Use '-c \"gdb_port pipe; "
-                                               "log_output openocd.log\"' instead.");
-                               break;
+                       default:  /* '?' */
+                               /* getopt will emit an error message, all we have to do is bail. */
+                               return ERROR_FAIL;
                }
        }
 
+       if (optind < argc) {
+               /* Catch extra arguments on the command line. */
+               LOG_OUTPUT("Unexpected command line argument: %s\n", argv[optind]);
+               return ERROR_FAIL;
+       }
+
        if (help_flag) {
                LOG_OUTPUT("Open On-Chip Debugger\nLicensed under GNU GPL v2\n");
                LOG_OUTPUT("--help       | -h\tdisplay this help\n");
                LOG_OUTPUT("--version    | -v\tdisplay OpenOCD version\n");
                LOG_OUTPUT("--file       | -f\tuse configuration file <name>\n");
                LOG_OUTPUT("--search     | -s\tdir to search for config files and scripts\n");
-               LOG_OUTPUT("--debug      | -d\tset debug level <0-3>\n");
+               LOG_OUTPUT("--debug      | -d\tset debug level to 3\n");
+               LOG_OUTPUT("             | -d<n>\tset debug level to <level>\n");
                LOG_OUTPUT("--log_output | -l\tredirect log output to file <name>\n");
                LOG_OUTPUT("--command    | -c\trun <command>\n");
                exit(-1);

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