Книга: UNIX — универсальная среда программирования

3.8.61 waitfile.c

3.8.61 waitfile.c
/* waitfile: wait until file stops changing */
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
char *progname;
main(argc, argv)
 int argc;
 char *argv[];
{
 int fd;
 struct stat stbuf;
 time_t old_time = 0;
 progname = argv[0];
 if (argc < 2)
  error("Usage: %s filename [cmd]", progname);
 if ((fd = open(argv[1], 0)) == -1)
  error("can't open %s", argv[1]);
 fstat(fd, &stbuf);
 while (stbuf.st_mtime != old_time) {
  old_time = stbuf.st_mtime;
  sleep(60);
  fstat(fd, &stbuf);
 }
 if (argc == 2) { /* copy file */
  execlp("cat", "cat", argv[1], (char*)0);
  error("can't execute cat %s", argv[1]);
 } else { /* run process */
  execvp(argv[2], &argv[2]);
  error("can't execute %s", argv[2]);
 }
 exit(0);
}
#include "error.c"

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