本文实例讲述了Linux下C语言修改进程名称的方法。分享给大家供大家参考。具体如下：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
|
#include <stdio.h>#include <string.h>#include "./util/setproctitle.c"// extern char **environ;// int main(int argc , char *argv[])// {// int i;// printf("argc:%d\n" , argc);// for (i = 0; i < argc; ++i){// printf("0x%x\n" , argv[i]);// printf("argv[%d]:%s\n" , i , argv[i]);// }// printf("evriron=%x\n" , environ[0]);// return 0;// }int main(int argc, char **argv){ spt_init(argc,argv); setproctitle("设置进程名为:this is a test"); sleep(1000); return 0;} |
setproctitle.c文件如下：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
/* ========================================================================== * setproctitle.c - Linux/Darwin setproctitle. * -------------------------------------------------------------------------- * Copyright (C) 2010 William Ahern * Copyright (C) 2013 Salvatore Sanfilippo * Copyright (C) 2013 Stam He * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to permit * persons to whom the Software is furnished to do so, subject to the * following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN * NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE * USE OR OTHER DEALINGS IN THE SOFTWARE. * ========================================================================== */#ifndef _GNU_SOURCE#define _GNU_SOURCE#endif #include <stddef.h> /* NULL size_t */#include <stdarg.h> /* va_list va_start va_end */#include <stdlib.h> /* malloc(3) setenv(3) clearenv(3) setproctitle(3) getprogname(3) */#include <stdio.h> /* vsnprintf(3) snprintf(3) */#include <string.h> /* strlen(3) strchr(3) strdup(3) memset(3) memcpy(3) */#include <errno.h> /* errno program_invocation_name program_invocation_short_name */#if !defined(HAVE_SETPROCTITLE)#define HAVE_SETPROCTITLE (defined __NetBSD__ || defined __FreeBSD__ || defined __OpenBSD__)#endif#if !HAVE_SETPROCTITLE#if (defined __linux || defined __APPLE__)extern char **environ;static struct { /* original value */ const char *arg0; /* title space available */ char *base, *end; /* pointer to original nul character within base */ char *nul; _Bool reset; int error;} SPT;#ifndef SPT_MIN#define SPT_MIN(a, b) (((a) < (b))? (a) : (b))#endifstatic inline size_t spt_min(size_t a, size_t b);static int spt_clearenv(void);static int spt_copyenv(char *oldenv[]);static int spt_copyargs(int argc, char *argv[]) ;void spt_init(int argc, char *argv[]);void setproctitle(const char *fmt, ...);static inline size_t spt_min(size_t a, size_t b) { return SPT_MIN(a, b);} /* spt_min() *//* * For discussion on the portability of the various methods, see * http://lists.freebsd.org/pipermail/freebsd-stable/2008-June/043136.html */static int spt_clearenv(void) {#if __GLIBC__ clearenv(); return 0;#else extern char **environ; static char **tmp; if (!(tmp = malloc(sizeof *tmp))) return errno; tmp[0] = NULL; environ = tmp; return 0;#endif} /* spt_clearenv() */static int spt_copyenv(char *oldenv[]) { extern char **environ; char *eq; int i, error; if (environ != oldenv) return 0; if ((error = spt_clearenv())) goto error; for (i = 0; oldenv[i]; i++) { if (!(eq = strchr(oldenv[i], '='))) continue; *eq = '\0'; error = (0 != setenv(oldenv[i], eq + 1, 1))? errno : 0; *eq = '='; if (error) goto error; } return 0;error: environ = oldenv; return error;} /* spt_copyenv() */static int spt_copyargs(int argc, char *argv[]) { char *tmp; int i; for (i = 1; i < argc || (i >= argc && argv[i]); i++) { if (!argv[i]) continue; if (!(tmp = strdup(argv[i]))) return errno; argv[i] = tmp; } return 0;} /* spt_copyargs() */void spt_init(int argc, char *argv[]) { char **envp = environ; char *base, *end, *nul, *tmp; int i, error; if (!(base = argv[0])) return; nul = &base[strlen(base)]; end = nul + 1; for (i = 0; i < argc || (i >= argc && argv[i]); i++) { if (!argv[i] || argv[i] < end) continue; end = argv[i] + strlen(argv[i]) + 1; } for (i = 0; envp[i]; i++) { if (envp[i] < end) continue; end = envp[i] + strlen(envp[i]) + 1; } if (!(SPT.arg0 = strdup(argv[0]))) goto syerr; if ((error = spt_copyenv(envp))) goto error; if ((error = spt_copyargs(argc, argv))) goto error; SPT.nul = nul; SPT.base = base; SPT.end = end; return;syerr: error = errno;error: SPT.error = error;} /* spt_init() */#ifndef SPT_MAXTITLE#define SPT_MAXTITLE 255#endifvoid setproctitle(const char *fmt, ...) { char buf[SPT_MAXTITLE + 1]; /* use buffer in case argv[0] is passed */ va_list ap; char *nul; int len, error; if (!SPT.base) return; if (fmt) { va_start(ap, fmt); len = vsnprintf(buf, sizeof buf, fmt, ap); va_end(ap); } else { len = snprintf(buf, sizeof buf, "%s", SPT.arg0); } if (len <= 0) { error = errno; goto error; } if (!SPT.reset) { memset(SPT.base, 0, SPT.end - SPT.base); SPT.reset = 1; } else { memset(SPT.base, 0, spt_min(sizeof buf, SPT.end - SPT.base)); } len = spt_min(len, spt_min(sizeof buf, SPT.end - SPT.base) - 1); memcpy(SPT.base, buf, len); nul = &SPT.base[len]; if (nul < SPT.nul) { *SPT.nul = '.'; } else if (nul == SPT.nul && &nul[1] < SPT.end) { *SPT.nul = ' '; *++nul = '\0'; } return;error: SPT.error = error;} /* setproctitle() */#endif /* __linux || __APPLE__ */#endif /* !HAVE_SETPROCTITLE */ |
希望本文所述对大家的C语言程序设计有所帮助。
