//將消息插入系統登陸程序中

#include <sys/types.h>#include <sys/time.h>#include <syslog.h>#include "error.h"#include "substdio.h"#include "subfd.h"#include "exit.h"#include "str.h"#include "scan.h"#include "fmt.h"char buf[800]; /* syslog truncates long lines (or crashes); GPACIC */int bufpos = 0; /* 0 <= bufpos < sizeof(buf) */int flagcont = 0;int priority; /* defined if flagcont */char stamp[FMT_ULONG + FMT_ULONG + 3]; /* defined if flagcont */void stamp_make(){  struct timeval tv;  char *s;  gettimeofday(&tv,(struct timezone *) 0);  s = stamp;  s += fmt_ulong(s,(unsigned long) tv.tv_sec);  *s++ = '.';  s += fmt_uint0(s,(unsigned int) tv.tv_usec,6);  *s = 0;}void flush(){  if (bufpos) {    buf[bufpos] = 0;    if (flagcont)      syslog(priority,"%s+%s",stamp,buf); /* logger folds invisibly; GPACIC */    else {      stamp_make();      priority = LOG_INFO;      if (str_start(buf,"warning:")) priority = LOG_WARNING;      if (str_start(buf,"alert:")) priority = LOG_ALERT;      syslog(priority,"%s %s",stamp,buf);      flagcont = 1;    }  }  bufpos = 0;}void main(argc,argv)int argc;char **argv;{  char ch;  if (argv[1])    if (argv[2]) {      unsigned long facility;      scan_ulong(argv[2],&facility);      openlog(argv[1],0,facility << 3);    }    else      openlog(argv[1],0,LOG_MAIL);  else    openlog("splogger",0,LOG_MAIL);  for (;;) {    if (substdio_get(subfdin,&ch,1) < 1) _exit(0);    if (ch == '\n') { flush(); flagcont = 0; continue; }    if (bufpos == sizeof(buf) - 1) flush();    if ((ch < 32) || (ch > 126)) ch = '?'; /* logger truncates at 0; GPACIC */    buf[bufpos++] = ch;  }}