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Annotation of coherent/a/usr/man/ALL/fgets, revision 1.1

1.1     ! root        1: 
        !             2: 
        !             3: fgets()                   STDIO Function                  fgets()
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        !             8: Read line from stream
        !             9: 
        !            10: #include <stdio.h>
        !            11: cchhaarr *ffggeettss(_s, _n, _f_p) cchhaarr *_s; iinntt _n; FFIILLEE *_f_p;
        !            12: 
        !            13: fgets reads  characters from  the stream  fp into string  s until
        !            14: either _n-1 characters have been read,  or a newline or EOF is en-
        !            15: countered.  It  retains the newline,  if any, and  appends a null
        !            16: character at  the end of of the string.   fgets returns the argu-
        !            17: ment _s if any characters were read, and NULL if none were read.
        !            18: 
        !            19: ***** Example *****
        !            20: 
        !            21: This example  looks for the pattern given  by argv[1] in standard
        !            22: input or in file argv[2].  It demonstrates the functions pnmatch,
        !            23: fgets, and freopen.
        !            24: 
        !            25: 
        !            26: #include <stdio.h>
        !            27: #define MAXLINE 128
        !            28: char buf[MAXLINE];
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        !            31: 
        !            32: void fatal(s) char *s;
        !            33: {
        !            34:         fprintf(stderr, "pnmatch: %s\n", s);
        !            35:         exit(1);
        !            36: }
        !            37: 
        !            38: 
        !            39: 
        !            40: main(argc, argv)
        !            41: int argc; char *argv[];
        !            42: {
        !            43:         if (argc != 2 && argc != 3)
        !            44:                 fatal("Usage: pnmatch pattern [ file ]");
        !            45: 
        !            46: 
        !            47: 
        !            48:         if (argc==3 && freopen(argv[2], "r", stdin)==NULL)
        !            49:                 fatal("cannot open input file");
        !            50: 
        !            51: 
        !            52: 
        !            53:         while (fgets(buf, MAXLINE, stdin) != NULL) {
        !            54:                 if (pnmatch(buf, argv[1], 1))
        !            55:                         printf("%s", buf);
        !            56:         }
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        !            63: 
        !            64: COHERENT Lexicon                                           Page 1
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        !            68: 
        !            69: fgets()                   STDIO Function                  fgets()
        !            70: 
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        !            72: 
        !            73:         if (!feof(stdin))
        !            74:                 fatal("read error");
        !            75:         exit(0);
        !            76: }
        !            77: 
        !            78: 
        !            79: ***** See Also *****
        !            80: 
        !            81: fgetc(), gets(), STDIO
        !            82: 
        !            83: ***** Diagnostics *****
        !            84: 
        !            85: fgets returns NULL  if an error occurs, or if  EOF is seen before
        !            86: any characters are read.
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        !           130: COHERENT Lexicon                                           Page 2
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