Find 'avrdude.conf' based on absolute path to executable (#780)
* Find 'avrdude.conf' based on absolute path to executable * Update coding style * Update coding style * Update 'src/doc/avrdude.texi' to reflect the new search method for 'avrdude.conf'
This commit is contained in:
Kristof Mulier
GitHub
parent
6aa65683ad
commit
5c896992cd
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@ -547,6 +547,8 @@ add_executable(avrdude
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main.c
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term.c
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term.h
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whereami.c
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whereami.h
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"${EXTRA_WINDOWS_SOURCES}"
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)
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@ -194,6 +194,8 @@ include_HEADERS = libavrdude.h
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avrdude_SOURCES = \
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main.c \
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whereami.c \
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whereami.h \
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term.c \
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term.h
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@ -448,10 +448,22 @@ Currently, the following programmer ids are understood and supported:
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@item -C @var{config-file}
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Use the specified config file for configuration data. This file
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contains all programmer and part definitions that AVRDUDE knows about.
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If not
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specified, AVRDUDE reads the configuration file from
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/usr/local/etc/avrdude.conf (FreeBSD and Linux). See Appendix A for
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the method of searching for the configuration file for Windows.
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If not specified, AVRDUDE looks for the configuration file in the following
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two locations:
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@enumerate
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@item
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@code{<directory from which application loaded>/../etc/avrdude.conf}
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@item
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@code{<directory from which application loaded>/avrdude.conf}
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@end enumerate
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If not found there, the lookup procedure becomes platform dependent. On FreeBSD
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and Linux, AVRDUDE looks at @code{/usr/local/etc/avrdude.conf}. See Appendix A
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for the method of searching on Windows.
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If @var{config-file} is written as @var{+filename}
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then this file is read after the system wide and user configuration
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@ -2296,6 +2308,10 @@ configuration files:
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@enumerate
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@item
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Only for the system configuration file:
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@code{<directory from which application loaded>/../etc/avrdude.conf}
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@item
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The directory from which the application loaded.
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129
src/main.c
129
src/main.c
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@ -33,6 +33,7 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <whereami.h>
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#include <stdarg.h>
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#include <errno.h>
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#include <fcntl.h>
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@ -329,6 +330,10 @@ int main(int argc, char * argv [])
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char * partdesc; /* part id */
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char sys_config[PATH_MAX]; /* system wide config file */
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char usr_config[PATH_MAX]; /* per-user config file */
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char executable_abspath[PATH_MAX]; /* absolute path to avrdude executable */
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char executable_dirpath[PATH_MAX]; /* absolute path to folder with executable */
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bool executable_abspath_found = false; /* absolute path to executable found */
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bool sys_config_found = false; /* 'avrdude.conf' file found */
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char * e; /* for strtol() error checking */
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int baudrate; /* override default programmer baud rate */
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double bitclock; /* Specify programmer bit clock (JTAG ICE) */
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@ -417,31 +422,131 @@ int main(int argc, char * argv [])
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is_open = 0;
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logfile = NULL;
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/*
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* EXECUTABLE ABSPATH
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* ------------------
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* Determine the absolute path to avrdude executable. This will be used to
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* locate the 'avrdude.conf' file later.
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*/
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int executable_dirpath_len;
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int executable_abspath_len = wai_getExecutablePath(
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executable_abspath,
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PATH_MAX,
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&executable_dirpath_len
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);
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if (
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(executable_abspath_len != -1) &&
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(executable_abspath_len != 0) &&
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(executable_dirpath_len != -1) &&
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(executable_dirpath_len != 0)
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) {
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// All requirements satisfied, executable path was found
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executable_abspath_found = true;
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// Make sure the string is null terminated
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executable_abspath[executable_abspath_len] = '\0';
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// Replace all backslashes with forward slashes
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i = 0;
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while (true) {
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if (executable_abspath[i] == '\0') {
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break;
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}
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if (executable_abspath[i] == '\\') {
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executable_abspath[i] = '/';
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}
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i++;
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}
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// Define 'executable_dirpath' to be the path to the parent folder of the
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// executable.
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strcpy(executable_dirpath, executable_abspath);
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executable_dirpath[executable_dirpath_len] = '\0';
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// Debug output
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// avrdude_message(MSG_INFO, "executable_abspath = %s\n", executable_abspath);
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// avrdude_message(MSG_INFO, "executable_abspath_len = %i\n", executable_abspath_len);
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// avrdude_message(MSG_INFO, "executable_dirpath = %s\n", executable_dirpath);
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// avrdude_message(MSG_INFO, "executable_dirpath_len = %i\n", executable_dirpath_len);
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}
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/*
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* SYSTEM CONFIG
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* -------------
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* Determine the location of 'avrdude.conf'. Check in this order:
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* 1. <dirpath of executable>/../etc/avrdude.conf
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* 2. <dirpath of executable>/avrdude.conf
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* 3. CONFIG_DIR/avrdude.conf
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*
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* When found, write the result into the 'sys_config' variable.
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*/
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if (executable_abspath_found) {
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// 1. Check <dirpath of executable>/../etc/avrdude.conf
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strcpy(sys_config, executable_dirpath);
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sys_config[PATH_MAX - 1] = '\0';
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i = strlen(sys_config);
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if (i && (sys_config[i - 1] != '/'))
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strcat(sys_config, "/");
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strcat(sys_config, "../etc/avrdude.conf");
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sys_config[PATH_MAX - 1] = '\0';
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if (access(sys_config, F_OK) == 0) {
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sys_config_found = true;
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}
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else {
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// 2. Check <dirpath of executable>/avrdude.conf
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strcpy(sys_config, executable_dirpath);
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sys_config[PATH_MAX - 1] = '\0';
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i = strlen(sys_config);
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if (i && (sys_config[i - 1] != '/'))
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strcat(sys_config, "/");
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strcat(sys_config, "avrdude.conf");
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sys_config[PATH_MAX - 1] = '\0';
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if (access(sys_config, F_OK) == 0) {
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sys_config_found = true;
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}
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}
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}
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if (!sys_config_found) {
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// 3. Check CONFIG_DIR/avrdude.conf
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#if defined(WIN32NATIVE)
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win_sys_config_set(sys_config);
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win_usr_config_set(usr_config);
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win_sys_config_set(sys_config);
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#else
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strcpy(sys_config, CONFIG_DIR);
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i = strlen(sys_config);
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if (i && (sys_config[i - 1] != '/'))
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strcat(sys_config, "/");
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strcat(sys_config, "avrdude.conf");
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#endif
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if (access(sys_config, F_OK) == 0) {
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sys_config_found = true;
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}
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}
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// Debug output
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// avrdude_message(MSG_INFO, "sys_config = %s\n", sys_config);
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// avrdude_message(MSG_INFO, "sys_config_found = %s\n", sys_config_found ? "true" : "false");
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// avrdude_message(MSG_INFO, "\n");
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strcpy(sys_config, CONFIG_DIR);
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i = strlen(sys_config);
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if (i && (sys_config[i-1] != '/'))
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strcat(sys_config, "/");
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strcat(sys_config, "avrdude.conf");
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/*
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* USER CONFIG
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* -----------
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* Determine the location of '.avrduderc'. Nothing changed here.
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*/
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#if defined(WIN32NATIVE)
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win_usr_config_set(usr_config);
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#else
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usr_config[0] = 0;
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homedir = getenv("HOME");
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if (homedir != NULL) {
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strcpy(usr_config, homedir);
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i = strlen(usr_config);
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if (i && (usr_config[i-1] != '/'))
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if (i && (usr_config[i - 1] != '/'))
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strcat(usr_config, "/");
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strcat(usr_config, ".avrduderc");
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}
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#endif
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len = strlen(progname) + 2;
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for (i=0; i<len; i++)
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progbuf[i] = ' ';
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@ -0,0 +1,796 @@
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// (‑●‑●)> dual licensed under the WTFPL v2 and MIT licenses
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// without any warranty.
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// by Gregory Pakosz (@gpakosz)
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// https://github.com/gpakosz/whereami
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// in case you want to #include "whereami.c" in a larger compilation unit
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#if !defined(WHEREAMI_H)
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#include <whereami.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if !defined(WAI_MALLOC) || !defined(WAI_FREE) || !defined(WAI_REALLOC)
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#include <stdlib.h>
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#endif
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#if !defined(WAI_MALLOC)
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#define WAI_MALLOC(size) malloc(size)
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#endif
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#if !defined(WAI_FREE)
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#define WAI_FREE(p) free(p)
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#endif
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#if !defined(WAI_REALLOC)
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#define WAI_REALLOC(p, size) realloc(p, size)
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#endif
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#ifndef WAI_NOINLINE
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#if defined(_MSC_VER)
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#define WAI_NOINLINE __declspec(noinline)
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#elif defined(__GNUC__)
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#define WAI_NOINLINE __attribute__((noinline))
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#else
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#error unsupported compiler
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#endif
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#endif
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#if defined(_MSC_VER)
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#define WAI_RETURN_ADDRESS() _ReturnAddress()
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#elif defined(__GNUC__)
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#define WAI_RETURN_ADDRESS() __builtin_extract_return_addr(__builtin_return_address(0))
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#else
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#error unsupported compiler
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#endif
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#if defined(_WIN32)
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#ifndef WIN32_LEAN_AND_MEAN
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#define WIN32_LEAN_AND_MEAN
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#endif
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#if defined(_MSC_VER)
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#pragma warning(push, 3)
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#endif
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#include <windows.h>
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#include <intrin.h>
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#if defined(_MSC_VER)
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#pragma warning(pop)
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#endif
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#include <stdbool.h>
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static int WAI_PREFIX(getModulePath_)(HMODULE module, char* out, int capacity, int* dirname_length)
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{
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wchar_t buffer1[MAX_PATH];
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wchar_t buffer2[MAX_PATH];
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wchar_t* path = NULL;
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int length = -1;
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bool ok;
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for (ok = false; !ok; ok = true)
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{
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DWORD size;
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int length_, length__;
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size = GetModuleFileNameW(module, buffer1, sizeof(buffer1) / sizeof(buffer1[0]));
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if (size == 0)
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break;
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else if (size == (DWORD)(sizeof(buffer1) / sizeof(buffer1[0])))
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{
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DWORD size_ = size;
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do
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{
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wchar_t* path_;
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path_ = (wchar_t*)WAI_REALLOC(path, sizeof(wchar_t) * size_ * 2);
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if (!path_)
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break;
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size_ *= 2;
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path = path_;
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size = GetModuleFileNameW(module, path, size_);
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}
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while (size == size_);
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if (size == size_)
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break;
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}
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else
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path = buffer1;
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if (!_wfullpath(buffer2, path, MAX_PATH))
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break;
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length_ = (int)wcslen(buffer2);
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length__ = WideCharToMultiByte(CP_UTF8, 0, buffer2, length_ , out, capacity, NULL, NULL);
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if (length__ == 0)
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length__ = WideCharToMultiByte(CP_UTF8, 0, buffer2, length_, NULL, 0, NULL, NULL);
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if (length__ == 0)
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break;
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if (length__ <= capacity && dirname_length)
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{
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int i;
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for (i = length__ - 1; i >= 0; --i)
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{
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if (out[i] == '\\')
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{
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*dirname_length = i;
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break;
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}
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}
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}
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length = length__;
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}
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if (path != buffer1)
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WAI_FREE(path);
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return ok ? length : -1;
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}
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WAI_NOINLINE WAI_FUNCSPEC
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int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
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{
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return WAI_PREFIX(getModulePath_)(NULL, out, capacity, dirname_length);
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}
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WAI_NOINLINE WAI_FUNCSPEC
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int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
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{
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HMODULE module;
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int length = -1;
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#if defined(_MSC_VER)
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#pragma warning(push)
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#pragma warning(disable: 4054)
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#endif
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if (GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, (LPCTSTR)WAI_RETURN_ADDRESS(), &module))
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#if defined(_MSC_VER)
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#pragma warning(pop)
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#endif
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{
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length = WAI_PREFIX(getModulePath_)(module, out, capacity, dirname_length);
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}
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return length;
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}
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#elif defined(__linux__) || defined(__CYGWIN__) || defined(__sun) || defined(WAI_USE_PROC_SELF_EXE)
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#if defined(__linux__)
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#include <linux/limits.h>
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#else
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#include <limits.h>
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#endif
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#ifndef __STDC_FORMAT_MACROS
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#define __STDC_FORMAT_MACROS
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#endif
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#include <inttypes.h>
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#include <stdbool.h>
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#if !defined(WAI_PROC_SELF_EXE)
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#if defined(__sun)
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#define WAI_PROC_SELF_EXE "/proc/self/path/a.out"
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#else
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#define WAI_PROC_SELF_EXE "/proc/self/exe"
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#endif
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#endif
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WAI_FUNCSPEC
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int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
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{
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char buffer[PATH_MAX];
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char* resolved = NULL;
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int length = -1;
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bool ok;
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for (ok = false; !ok; ok = true)
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{
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resolved = realpath(WAI_PROC_SELF_EXE, buffer);
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if (!resolved)
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break;
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length = (int)strlen(resolved);
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if (length <= capacity)
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{
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memcpy(out, resolved, length);
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if (dirname_length)
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{
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int i;
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for (i = length - 1; i >= 0; --i)
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{
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if (out[i] == '/')
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{
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*dirname_length = i;
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break;
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}
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}
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}
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}
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}
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return ok ? length : -1;
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}
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#if !defined(WAI_PROC_SELF_MAPS_RETRY)
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#define WAI_PROC_SELF_MAPS_RETRY 5
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#endif
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#if !defined(WAI_PROC_SELF_MAPS)
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#if defined(__sun)
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#define WAI_PROC_SELF_MAPS "/proc/self/map"
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#else
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#define WAI_PROC_SELF_MAPS "/proc/self/maps"
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#endif
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#endif
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#if defined(__ANDROID__) || defined(ANDROID)
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#include <fcntl.h>
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#include <sys/mman.h>
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#include <unistd.h>
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#endif
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#include <stdbool.h>
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WAI_NOINLINE WAI_FUNCSPEC
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int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
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{
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int length = -1;
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FILE* maps = NULL;
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for (int r = 0; r < WAI_PROC_SELF_MAPS_RETRY; ++r)
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{
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maps = fopen(WAI_PROC_SELF_MAPS, "r");
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if (!maps)
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break;
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for (;;)
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{
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char buffer[PATH_MAX < 1024 ? 1024 : PATH_MAX];
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uint64_t low, high;
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char perms[5];
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uint64_t offset;
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uint32_t major, minor;
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char path[PATH_MAX];
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uint32_t inode;
|
||||
|
||||
if (!fgets(buffer, sizeof(buffer), maps))
|
||||
break;
|
||||
|
||||
if (sscanf(buffer, "%" PRIx64 "-%" PRIx64 " %s %" PRIx64 " %x:%x %u %s\n", &low, &high, perms, &offset, &major, &minor, &inode, path) == 8)
|
||||
{
|
||||
uint64_t addr = (uintptr_t)WAI_RETURN_ADDRESS();
|
||||
if (low <= addr && addr <= high)
|
||||
{
|
||||
char* resolved;
|
||||
|
||||
resolved = realpath(path, buffer);
|
||||
if (!resolved)
|
||||
break;
|
||||
|
||||
length = (int)strlen(resolved);
|
||||
#if defined(__ANDROID__) || defined(ANDROID)
|
||||
if (length > 4
|
||||
&&buffer[length - 1] == 'k'
|
||||
&&buffer[length - 2] == 'p'
|
||||
&&buffer[length - 3] == 'a'
|
||||
&&buffer[length - 4] == '.')
|
||||
{
|
||||
int fd = open(path, O_RDONLY);
|
||||
if (fd == -1)
|
||||
{
|
||||
length = -1; // retry
|
||||
break;
|
||||
}
|
||||
|
||||
char* begin = (char*)mmap(0, offset, PROT_READ, MAP_SHARED, fd, 0);
|
||||
if (begin == MAP_FAILED)
|
||||
{
|
||||
close(fd);
|
||||
length = -1; // retry
|
||||
break;
|
||||
}
|
||||
|
||||
char* p = begin + offset - 30; // minimum size of local file header
|
||||
while (p >= begin) // scan backwards
|
||||
{
|
||||
if (*((uint32_t*)p) == 0x04034b50UL) // local file header signature found
|
||||
{
|
||||
uint16_t length_ = *((uint16_t*)(p + 26));
|
||||
|
||||
if (length + 2 + length_ < (int)sizeof(buffer))
|
||||
{
|
||||
memcpy(&buffer[length], "!/", 2);
|
||||
memcpy(&buffer[length + 2], p + 30, length_);
|
||||
length += 2 + length_;
|
||||
}
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
--p;
|
||||
}
|
||||
|
||||
munmap(begin, offset);
|
||||
close(fd);
|
||||
}
|
||||
#endif
|
||||
if (length <= capacity)
|
||||
{
|
||||
memcpy(out, resolved, length);
|
||||
|
||||
if (dirname_length)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = length - 1; i >= 0; --i)
|
||||
{
|
||||
if (out[i] == '/')
|
||||
{
|
||||
*dirname_length = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fclose(maps);
|
||||
maps = NULL;
|
||||
|
||||
if (length != -1)
|
||||
break;
|
||||
}
|
||||
|
||||
return length;
|
||||
}
|
||||
|
||||
#elif defined(__APPLE__)
|
||||
|
||||
#define _DARWIN_BETTER_REALPATH
|
||||
#include <mach-o/dyld.h>
|
||||
#include <limits.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <dlfcn.h>
|
||||
#include <stdbool.h>
|
||||
|
||||
WAI_FUNCSPEC
|
||||
int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
|
||||
{
|
||||
char buffer1[PATH_MAX];
|
||||
char buffer2[PATH_MAX];
|
||||
char* path = buffer1;
|
||||
char* resolved = NULL;
|
||||
int length = -1;
|
||||
bool ok;
|
||||
|
||||
for (ok = false; !ok; ok = true)
|
||||
{
|
||||
uint32_t size = (uint32_t)sizeof(buffer1);
|
||||
if (_NSGetExecutablePath(path, &size) == -1)
|
||||
{
|
||||
path = (char*)WAI_MALLOC(size);
|
||||
if (!_NSGetExecutablePath(path, &size))
|
||||
break;
|
||||
}
|
||||
|
||||
resolved = realpath(path, buffer2);
|
||||
if (!resolved)
|
||||
break;
|
||||
|
||||
length = (int)strlen(resolved);
|
||||
if (length <= capacity)
|
||||
{
|
||||
memcpy(out, resolved, length);
|
||||
|
||||
if (dirname_length)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = length - 1; i >= 0; --i)
|
||||
{
|
||||
if (out[i] == '/')
|
||||
{
|
||||
*dirname_length = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (path != buffer1)
|
||||
WAI_FREE(path);
|
||||
|
||||
return ok ? length : -1;
|
||||
}
|
||||
|
||||
WAI_NOINLINE WAI_FUNCSPEC
|
||||
int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
|
||||
{
|
||||
char buffer[PATH_MAX];
|
||||
char* resolved = NULL;
|
||||
int length = -1;
|
||||
|
||||
for(;;)
|
||||
{
|
||||
Dl_info info;
|
||||
|
||||
if (dladdr(WAI_RETURN_ADDRESS(), &info))
|
||||
{
|
||||
resolved = realpath(info.dli_fname, buffer);
|
||||
if (!resolved)
|
||||
break;
|
||||
|
||||
length = (int)strlen(resolved);
|
||||
if (length <= capacity)
|
||||
{
|
||||
memcpy(out, resolved, length);
|
||||
|
||||
if (dirname_length)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = length - 1; i >= 0; --i)
|
||||
{
|
||||
if (out[i] == '/')
|
||||
{
|
||||
*dirname_length = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
return length;
|
||||
}
|
||||
|
||||
#elif defined(__QNXNTO__)
|
||||
|
||||
#include <limits.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <dlfcn.h>
|
||||
#include <stdbool.h>
|
||||
|
||||
#if !defined(WAI_PROC_SELF_EXE)
|
||||
#define WAI_PROC_SELF_EXE "/proc/self/exefile"
|
||||
#endif
|
||||
|
||||
WAI_FUNCSPEC
|
||||
int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
|
||||
{
|
||||
char buffer1[PATH_MAX];
|
||||
char buffer2[PATH_MAX];
|
||||
char* resolved = NULL;
|
||||
FILE* self_exe = NULL;
|
||||
int length = -1;
|
||||
bool ok;
|
||||
|
||||
for (ok = false; !ok; ok = true)
|
||||
{
|
||||
self_exe = fopen(WAI_PROC_SELF_EXE, "r");
|
||||
if (!self_exe)
|
||||
break;
|
||||
|
||||
if (!fgets(buffer1, sizeof(buffer1), self_exe))
|
||||
break;
|
||||
|
||||
resolved = realpath(buffer1, buffer2);
|
||||
if (!resolved)
|
||||
break;
|
||||
|
||||
length = (int)strlen(resolved);
|
||||
if (length <= capacity)
|
||||
{
|
||||
memcpy(out, resolved, length);
|
||||
|
||||
if (dirname_length)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = length - 1; i >= 0; --i)
|
||||
{
|
||||
if (out[i] == '/')
|
||||
{
|
||||
*dirname_length = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fclose(self_exe);
|
||||
|
||||
return ok ? length : -1;
|
||||
}
|
||||
|
||||
WAI_FUNCSPEC
|
||||
int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
|
||||
{
|
||||
char buffer[PATH_MAX];
|
||||
char* resolved = NULL;
|
||||
int length = -1;
|
||||
|
||||
for(;;)
|
||||
{
|
||||
Dl_info info;
|
||||
|
||||
if (dladdr(WAI_RETURN_ADDRESS(), &info))
|
||||
{
|
||||
resolved = realpath(info.dli_fname, buffer);
|
||||
if (!resolved)
|
||||
break;
|
||||
|
||||
length = (int)strlen(resolved);
|
||||
if (length <= capacity)
|
||||
{
|
||||
memcpy(out, resolved, length);
|
||||
|
||||
if (dirname_length)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = length - 1; i >= 0; --i)
|
||||
{
|
||||
if (out[i] == '/')
|
||||
{
|
||||
*dirname_length = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
return length;
|
||||
}
|
||||
|
||||
#elif defined(__DragonFly__) || defined(__FreeBSD__) || \
|
||||
defined(__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__)
|
||||
|
||||
#include <limits.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/sysctl.h>
|
||||
#include <dlfcn.h>
|
||||
#include <stdbool.h>
|
||||
|
||||
#if defined(__OpenBSD__)
|
||||
|
||||
#include <unistd.h>
|
||||
|
||||
WAI_FUNCSPEC
|
||||
int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
|
||||
{
|
||||
char buffer1[4096];
|
||||
char buffer2[PATH_MAX];
|
||||
char buffer3[PATH_MAX];
|
||||
char** argv = (char**)buffer1;
|
||||
char* resolved = NULL;
|
||||
int length = -1;
|
||||
bool ok;
|
||||
|
||||
for (ok = false; !ok; ok = true)
|
||||
{
|
||||
int mib[4] = { CTL_KERN, KERN_PROC_ARGS, getpid(), KERN_PROC_ARGV };
|
||||
size_t size;
|
||||
|
||||
if (sysctl(mib, 4, NULL, &size, NULL, 0) != 0)
|
||||
break;
|
||||
|
||||
if (size > sizeof(buffer1))
|
||||
{
|
||||
argv = (char**)WAI_MALLOC(size);
|
||||
if (!argv)
|
||||
break;
|
||||
}
|
||||
|
||||
if (sysctl(mib, 4, argv, &size, NULL, 0) != 0)
|
||||
break;
|
||||
|
||||
if (strchr(argv[0], '/'))
|
||||
{
|
||||
resolved = realpath(argv[0], buffer2);
|
||||
if (!resolved)
|
||||
break;
|
||||
}
|
||||
else
|
||||
{
|
||||
const char* PATH = getenv("PATH");
|
||||
if (!PATH)
|
||||
break;
|
||||
|
||||
size_t argv0_length = strlen(argv[0]);
|
||||
|
||||
const char* begin = PATH;
|
||||
while (1)
|
||||
{
|
||||
const char* separator = strchr(begin, ':');
|
||||
const char* end = separator ? separator : begin + strlen(begin);
|
||||
|
||||
if (end - begin > 0)
|
||||
{
|
||||
if (*(end -1) == '/')
|
||||
--end;
|
||||
|
||||
if (((end - begin) + 1 + argv0_length + 1) <= sizeof(buffer2))
|
||||
{
|
||||
memcpy(buffer2, begin, end - begin);
|
||||
buffer2[end - begin] = '/';
|
||||
memcpy(buffer2 + (end - begin) + 1, argv[0], argv0_length + 1);
|
||||
|
||||
resolved = realpath(buffer2, buffer3);
|
||||
if (resolved)
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (!separator)
|
||||
break;
|
||||
|
||||
begin = ++separator;
|
||||
}
|
||||
|
||||
if (!resolved)
|
||||
break;
|
||||
}
|
||||
|
||||
length = (int)strlen(resolved);
|
||||
if (length <= capacity)
|
||||
{
|
||||
memcpy(out, resolved, length);
|
||||
|
||||
if (dirname_length)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = length - 1; i >= 0; --i)
|
||||
{
|
||||
if (out[i] == '/')
|
||||
{
|
||||
*dirname_length = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (argv != (char**)buffer1)
|
||||
WAI_FREE(argv);
|
||||
|
||||
return ok ? length : -1;
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
WAI_FUNCSPEC
|
||||
int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
|
||||
{
|
||||
char buffer1[PATH_MAX];
|
||||
char buffer2[PATH_MAX];
|
||||
char* path = buffer1;
|
||||
char* resolved = NULL;
|
||||
int length = -1;
|
||||
bool ok;
|
||||
|
||||
for (ok = false; !ok; ok = true)
|
||||
{
|
||||
#if defined(__NetBSD__)
|
||||
int mib[4] = { CTL_KERN, KERN_PROC_ARGS, -1, KERN_PROC_PATHNAME };
|
||||
#else
|
||||
int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 };
|
||||
#endif
|
||||
size_t size = sizeof(buffer1);
|
||||
|
||||
if (sysctl(mib, 4, path, &size, NULL, 0) != 0)
|
||||
break;
|
||||
|
||||
resolved = realpath(path, buffer2);
|
||||
if (!resolved)
|
||||
break;
|
||||
|
||||
length = (int)strlen(resolved);
|
||||
if (length <= capacity)
|
||||
{
|
||||
memcpy(out, resolved, length);
|
||||
|
||||
if (dirname_length)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = length - 1; i >= 0; --i)
|
||||
{
|
||||
if (out[i] == '/')
|
||||
{
|
||||
*dirname_length = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return ok ? length : -1;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
WAI_NOINLINE WAI_FUNCSPEC
|
||||
int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length)
|
||||
{
|
||||
char buffer[PATH_MAX];
|
||||
char* resolved = NULL;
|
||||
int length = -1;
|
||||
|
||||
for(;;)
|
||||
{
|
||||
Dl_info info;
|
||||
|
||||
if (dladdr(WAI_RETURN_ADDRESS(), &info))
|
||||
{
|
||||
resolved = realpath(info.dli_fname, buffer);
|
||||
if (!resolved)
|
||||
break;
|
||||
|
||||
length = (int)strlen(resolved);
|
||||
if (length <= capacity)
|
||||
{
|
||||
memcpy(out, resolved, length);
|
||||
|
||||
if (dirname_length)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = length - 1; i >= 0; --i)
|
||||
{
|
||||
if (out[i] == '/')
|
||||
{
|
||||
*dirname_length = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
return length;
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
#error unsupported platform
|
||||
|
||||
#endif
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
|
@ -0,0 +1,67 @@
|
|||
// (‑●‑●)> dual licensed under the WTFPL v2 and MIT licenses
|
||||
// without any warranty.
|
||||
// by Gregory Pakosz (@gpakosz)
|
||||
// https://github.com/gpakosz/whereami
|
||||
|
||||
#ifndef WHEREAMI_H
|
||||
#define WHEREAMI_H
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
#ifndef WAI_FUNCSPEC
|
||||
#define WAI_FUNCSPEC
|
||||
#endif
|
||||
#ifndef WAI_PREFIX
|
||||
#define WAI_PREFIX(function) wai_##function
|
||||
#endif
|
||||
|
||||
/**
|
||||
* Returns the path to the current executable.
|
||||
*
|
||||
* Usage:
|
||||
* - first call `int length = wai_getExecutablePath(NULL, 0, NULL);` to
|
||||
* retrieve the length of the path
|
||||
* - allocate the destination buffer with `path = (char*)malloc(length + 1);`
|
||||
* - call `wai_getExecutablePath(path, length, NULL)` again to retrieve the
|
||||
* path
|
||||
* - add a terminal NUL character with `path[length] = '\0';`
|
||||
*
|
||||
* @param out destination buffer, optional
|
||||
* @param capacity destination buffer capacity
|
||||
* @param dirname_length optional recipient for the length of the dirname part
|
||||
* of the path.
|
||||
*
|
||||
* @return the length of the executable path on success (without a terminal NUL
|
||||
* character), otherwise `-1`
|
||||
*/
|
||||
WAI_FUNCSPEC
|
||||
int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length);
|
||||
|
||||
/**
|
||||
* Returns the path to the current module
|
||||
*
|
||||
* Usage:
|
||||
* - first call `int length = wai_getModulePath(NULL, 0, NULL);` to retrieve
|
||||
* the length of the path
|
||||
* - allocate the destination buffer with `path = (char*)malloc(length + 1);`
|
||||
* - call `wai_getModulePath(path, length, NULL)` again to retrieve the path
|
||||
* - add a terminal NUL character with `path[length] = '\0';`
|
||||
*
|
||||
* @param out destination buffer, optional
|
||||
* @param capacity destination buffer capacity
|
||||
* @param dirname_length optional recipient for the length of the dirname part
|
||||
* of the path.
|
||||
*
|
||||
* @return the length of the module path on success (without a terminal NUL
|
||||
* character), otherwise `-1`
|
||||
*/
|
||||
WAI_FUNCSPEC
|
||||
int WAI_PREFIX(getModulePath)(char* out, int capacity, int* dirname_length);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif // #ifndef WHEREAMI_H
|
||||
Loading…
Reference in New Issue