1 /*
2 * Copyright © 2003 Felix Kuehling
3 * Copyright © 2018 Advanced Micro Devices, Inc.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining
7 * a copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
15 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
16 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
17 * NON-INFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS, AUTHORS
18 * AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
21 * USE OR OTHER DEALINGS IN THE SOFTWARE.
22 *
23 * The above copyright notice and this permission notice (including the
24 * next paragraph) shall be included in all copies or substantial portions
25 * of the Software.
26 */
27
28 #include "u_process.h"
29 #include "detect_os.h"
30 #include "macros.h"
31 #include <string.h>
32 #include <errno.h>
33 #include <stdlib.h>
34
35 #undef GET_PROGRAM_NAME
36
37 #if DETECT_OS_WINDOWS
38 #include <windows.h>
39 #else
40 #include <unistd.h>
41 #endif
42
43 #if DETECT_OS_APPLE
44 #include <mach-o/dyld.h>
45 #endif
46
47 #if DETECT_OS_FREEBSD
48 #include <sys/types.h>
49 #include <sys/sysctl.h>
50 #endif
51
52 #if defined(__linux__) && defined(HAVE_PROGRAM_INVOCATION_NAME)
53
54 static char *path = NULL;
55
__freeProgramPath()56 static void __freeProgramPath()
57 {
58 free(path);
59 path = NULL;
60 }
61
62 static const char *
__getProgramName()63 __getProgramName()
64 {
65 char * arg = strrchr(program_invocation_name, '/');
66 if (arg) {
67 /* If the / character was found this is likely a linux path or
68 * an invocation path for a 64-bit wine program.
69 *
70 * However, some programs pass command line arguments into argv[0].
71 * Strip these arguments out by using the realpath only if it was
72 * a prefix of the invocation name.
73 */
74 if (!path) {
75 path = realpath("/proc/self/exe", NULL);
76 atexit(__freeProgramPath);
77 }
78
79 if (path && strncmp(path, program_invocation_name, strlen(path)) == 0) {
80 /* This shouldn't be null because path is a a prefix,
81 * but check it anyway since path is static. */
82 char * name = strrchr(path, '/');
83 if (name)
84 return name + 1;
85 }
86
87 return arg+1;
88 }
89
90 /* If there was no '/' at all we likely have a windows like path from
91 * a wine application.
92 */
93 arg = strrchr(program_invocation_name, '\\');
94 if (arg)
95 return arg+1;
96
97 return program_invocation_name;
98 }
99 # define GET_PROGRAM_NAME() __getProgramName()
100 #elif defined(HAVE_PROGRAM_INVOCATION_NAME)
101 # define GET_PROGRAM_NAME() program_invocation_short_name
102 #elif defined(__FreeBSD__) && (__FreeBSD__ >= 2)
103 # include <osreldate.h>
104 # if (__FreeBSD_version >= 440000)
105 # define GET_PROGRAM_NAME() getprogname()
106 # endif
107 #elif defined(__NetBSD__)
108 # include <sys/param.h>
109 # if defined(__NetBSD_Version__) && (__NetBSD_Version__ >= 106000100)
110 # define GET_PROGRAM_NAME() getprogname()
111 # endif
112 #elif defined(__DragonFly__)
113 # define GET_PROGRAM_NAME() getprogname()
114 #elif defined(__APPLE__)
115 # define GET_PROGRAM_NAME() getprogname()
116 #elif defined(ANDROID)
117 # define GET_PROGRAM_NAME() getprogname()
118 #elif defined(__sun)
119 /* Solaris has getexecname() which returns the full path - return just
120 the basename to match BSD getprogname() */
121 # include <libgen.h>
122
123 static const char *
__getProgramName()124 __getProgramName()
125 {
126 static const char *progname;
127
128 if (progname == NULL) {
129 const char *e = getexecname();
130 if (e != NULL) {
131 /* Have to make a copy since getexecname can return a readonly
132 string, but basename expects to be able to modify its arg. */
133 char *n = strdup(e);
134 if (n != NULL) {
135 progname = basename(n);
136 }
137 }
138 }
139 return progname;
140 }
141
142 # define GET_PROGRAM_NAME() __getProgramName()
143 #elif defined(WIN32)
144 static const char *
__getProgramName()145 __getProgramName()
146 {
147 static const char *progname;
148 if (progname == NULL) {
149 static char buf[MAX_PATH];
150 GetModuleFileNameA(NULL, buf, sizeof(buf));
151 progname = strrchr(buf, '\\');
152 if (progname)
153 progname++;
154 else
155 progname = buf;
156 }
157 return progname;
158 }
159 # define GET_PROGRAM_NAME() __getProgramName()
160 #elif defined(__HAIKU__)
161 # include <libgen.h>
162 extern char **__libc_argv;
163 extern int __libc_argc;
164
165 static const char *
__getProgramName()166 __getProgramName()
167 {
168 static const char *progname;
169
170 if (progname == NULL) {
171 char *n = strdup(__libc_argv[0]);
172 if (n != NULL) {
173 progname = basename(n);
174 }
175 }
176 return progname;
177 }
178 # define GET_PROGRAM_NAME() __getProgramName()
179 #endif
180
181 #if !defined(GET_PROGRAM_NAME)
182 # if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__UCLIBC__) || defined(ANDROID)
183 /* This is a hack. It's said to work on OpenBSD, NetBSD and GNU.
184 * Rogelio M.Serrano Jr. reported it's also working with UCLIBC. It's
185 * used as a last resort, if there is no documented facility available. */
186 static const char *
__getProgramName()187 __getProgramName()
188 {
189 extern const char *__progname;
190 char * arg = strrchr(__progname, '/');
191 if (arg)
192 return arg+1;
193 else
194 return __progname;
195 }
196 # define GET_PROGRAM_NAME() __getProgramName()
197 # else
198 # define GET_PROGRAM_NAME() ""
199 # pragma message ( "Warning: Per application configuration won't work with your OS version." )
200 # endif
201 #endif
202
203 const char *
util_get_process_name(void)204 util_get_process_name(void)
205 {
206 return GET_PROGRAM_NAME();
207 }
208
209 size_t
util_get_process_exec_path(char * process_path,size_t len)210 util_get_process_exec_path(char* process_path, size_t len)
211 {
212 #if DETECT_OS_WINDOWS
213 return GetModuleFileNameA(NULL, process_path, len);
214 #elif DETECT_OS_APPLE
215 uint32_t bufSize = len;
216 int result = _NSGetExecutablePath(process_path, &bufSize);
217
218 return (result == 0) ? strlen(process_path) : 0;
219 #elif DETECT_OS_FREEBSD
220 int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 };
221
222 (void) sysctl(mib, 4, process_path, &len, NULL, 0);
223 process_path[len - 1] = '\0';
224
225 return len;
226 #elif DETECT_OS_UNIX
227 ssize_t r;
228
229 if ((r = readlink("/proc/self/exe", process_path, len)) > 0)
230 goto success;
231 if ((r = readlink("/proc/curproc/exe", process_path, len)) > 0)
232 goto success;
233 if ((r = readlink("/proc/curproc/file", process_path, len)) > 0)
234 goto success;
235
236 return 0;
237 success:
238 if (r == len)
239 return 0;
240
241 process_path[r] = '\0';
242 return r;
243
244 #endif
245 return 0;
246 }
247