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Annotation of coherent/a/usr/man/ALL/fileno, revision 1.1.1.1

1.1       root        1: 
                      2: 
                      3: fileno()                  STDIO Function                 fileno()
                      4: 
                      5: 
                      6: 
                      7: 
                      8: Get file descriptor
                      9: 
                     10: #include <stdio.h>
                     11: iinntt ffiilleennoo(_f_p) FFIILLEE *_f_p;
                     12: 
                     13: fileno  returns  the file  descriptor  associated  with the  file
                     14: stream fp.   The file descriptor is the  integer returned by open
                     15: or creat.  It is used by  routines such as fopen to create a FFIILLEE
                     16: stream.
                     17: 
                     18: ***** Example *****
                     19: 
                     20: This example reads a file descriptor and prints it on the screen.
                     21: 
                     22: 
                     23: #include <stdio.h>
                     24: 
                     25: 
                     26: 
                     27: main(argc,argv)
                     28: int argc; char *argv[];
                     29: {
                     30:         FILE *fp;
                     31:         int fd;
                     32: 
                     33: 
                     34: 
                     35:         if (argc !=2) {
                     36:                 printf("Usage: fd_from_fp filename\n");
                     37:                 exit(0);
                     38:         }
                     39: 
                     40: 
                     41: 
                     42:         if ((fp = fopen(argv[1], "r")) == NULL) {
                     43:                 printf("Cannot open input file\n");
                     44:                 exit(0);
                     45:         }
                     46: 
                     47: 
                     48: 
                     49:         fd = fileno(fp);
                     50:         printf("The file descriptor for %s is %d\n",
                     51:                 argv[1], fd);
                     52: }
                     53: 
                     54: 
                     55: ***** See Also *****
                     56: 
                     57: FILE, file descriptor, STDIO
                     58: 
                     59: 
                     60: 
                     61: 
                     62: 
                     63: 
                     64: COHERENT Lexicon                                           Page 1
                     65: 
                     66: 

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