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/******************************************************** * print -- format files for printing * ********************************************************/ #include <stdio.h> #include <stdlib.h> /* ANSI Standard only */ int verbose = 0; /* verbose mode (default = false) */ char *out_file = "print.out"; /* output filename */ char *program_name; /* name of the program (for errors) */ int line_max = 66; /* number of lines per page */ main(int argc, char *argv[]) { void do_file(char *); /* print a file */ void usage(void); /* tell user how to use the program */ /* save the program name for future use */ program_name = argv[0]; /* * loop for each option. * Stop if we run out of arguments * or we get an argument without a dash. */ while ((argc > 1) && (argv[1][0] == '-')) { /* * argv[1][1] is the actual option character. */ switch (argv[1][1]) { /* * -v verbose */ case 'v': verbose = 1; break; /* * -o<name> output file * [0] is the dash * [1] is the "o" * [2] starts the name */ case 'o': out_file = &argv[1][2]; break; /* * -l<number> set max number of lines */ case 'l': line_max = atoi(&argv[1][2]); break; default: (void)fprintf(stderr,"Bad option %s\n", argv[1]); usage(); } /* * move the argument list up one * move the count down one */ argv++; argc--; } /* * At this point all the options have been processed. * Check to see if we have no files in the list * and if so, we need to process just standard in. */ if (argc == 1) { do_file("print.in"); } else { while (argc > 1) { do_file(argv[1]); argv++; argc--; } } return (0); } /******************************************************** * do_file -- dummy routine to handle a file * * * * Parameter * * name -- name of the file to print * ********************************************************/ void do_file(char *name) { (void)printf("Verbose %d Lines %d Input %s Output %s\n", verbose, line_max, name, out_file); } /******************************************************** * usage -- tell the user how to use this program and * * exit * ********************************************************/ void usage(void) { (void)fprintf(stderr,"Usage is %s [options] [file-list]\n", program_name); (void)fprintf(stderr,"Options\n"); (void)fprintf(stderr," -v verbose\n"); (void)fprintf(stderr," -l<number> Number of lines\n"); (void)fprintf(stderr," -o<name> Set output filename\n"); exit (8); }