文件操作函数

6.1 ungetc()

6.2 endgrent()

6.3 endpwent()

6.4 endutent()

6.5 fgetgrent()

6.6 fgetpwent()

6.7 getegid()

6.8 geteuid()

6.9 getgid()

6.10 getgrent()

6.11 getgrgid()

6.12 getgrnam()

6.13 getgroups()

6.14 getpw()

6.15 getpwent()

6.16 getpwnam()

6.17 getpwuid()

6.18 getuid()

6.19 getutent()

6.20 getutid()

6.21 getutline()

6.22 initgroups()

6.23 pututline()

6.24 seteuid()

6.25 setfsgid()

6.26 setfsuid()

6.27 setgid()

6.28 setgrent()

6.29 setgroups()

6.30 setpwent()

6.31 setregid()

6.32 setreuid()

6.33 setuid()

6.34 setutent()

6.35 utmpname()

6.36 close()

6.37 creat()

6.38 dup()

6.39 dup2()

6.40 fcntl()

6.41 flock()

6.42 fsync()

6.43 lseek()

6.44 mkstemp()

6.45 open()

6.46 read()

6.47 sync()

6.48 write()

6.49 clearerr()

6.50 fclose()

6.51 fdopen()

6.52 feof()

6.53 fflush()

6.54 fgetc()

6.55 fgets()

6.56 fileno()

6.57 fopen()

6.58 fputc()

6.59 fputs()

6.60 fread()

6.61 freopen()

6.62 fseek()

6.63 ftell()

6.64 fwrite()

6.65 getc()

6.66 getchar()

6.67 gets()

6.68 mktemp()

6.69 putc()

6.70 putchar()

6.71 rewind()

6.72 setbuf()

6.73 setbuffer()

6.74 setlinebuf()

6.75 setvbuf()