Linux下C语言修改进程名称的方法

#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 - 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 */