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POI'm getting a really odd timing error, where something is executing before I believe it should
 

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  1. POI'm getting a really odd timing error, where something is executing before I believe it should
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    <pre><code>#include &lt;stdio.h&gt; #include &lt;stdlib.h&gt; #include &lt;ctype.h&gt; #include &lt;string.h&gt; #include &lt;unistd.h&gt; #include &lt;errno.h&gt; int c, n, E, b, s, v, t, opt, valid = 0; char current = '\0'; char previous = '\0'; FILE *fp; /* -n numbers lines * -E appends a dollar sign to line ends * -b numbers only non-blank lines * -s squeezes multiple blank lines down to 1 * -v displays control chars, excluding tab * -t includes tab in the above * -e is the same as -E and -v */ int setFlags(int argc, char *argv[]) { int op; while ((op = getopt(argc, argv, "nEbsvte")) != -1) { switch (op) { case 'n': { n = 1; break; } case 'E': { E = 1; break; } case 'b': { b = 1; break; } case 's': { s = 1; break; } case 'v': { v = 1; break; } case 't': { t = 1; break; } case 'e': { E = 1; v = 1; break; } case '?': { //fprintf(stderr, "Option `-%c` is not valid.\n", optopt); return EXIT_FAILURE; } default: { abort(); } } } opt = optind; if(n == 1) { b = 0; } return EXIT_SUCCESS; } int checkFile(char *path) { if (access(path, R_OK) == 0) { return EXIT_SUCCESS; } else { fprintf(stderr, "cat: %s: %s\n", argv[i], strerror(errno)); errno = 0; return EXIT_FAILURE; } } int doPrint(char *path) { if (strcmp(path, "stdin") == 0) { fp = stdin; } else { if (checkFile(path) == 1) { return EXIT_FAILURE; } else { fp = fopen(path, "r"); } } while ((c = fgetc(fp)) != EOF) { putchar(c); } fclose(fp); return EXIT_SUCCESS; } int main (int argc, char *argv[]) { if (setFlags(argc, argv) == 1) { fprintf(stderr, "The program has terminated with an error.\n" "An invalid option was specified.\n"); return EXIT_FAILURE; } else { if ((argc - opt) == 0) { doPrint("stdin"); } else { for(int i = opt; i &lt; argc; i++) { doPrint(argv[i]); } } } } </code></pre> <p>I'm getting a really crazy bug, where my program outputs the error line in checkFile, before it finishes writing the contents of the file (always one chat before the end).</p> <p>It's driving me insane, and no matter where I move that piece of code, it doesn't work as intended.</p> <p>I'm sure the answer is probably trivial, but it has me stumped. I'd even thrown in sleeps and various other things just before output finished, and it would throw the error, THEN sleep, THEN print the final character.</p> <p>Any help?</p>
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USThanasi Poulos
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    1. This table or related slice is empty.
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    1. This table or related slice is empty.
    1. COAh, good ol' global variables. I don't even bother looking further.
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      1. POI'm getting a really odd timing error, where something is executing before I believe it should
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    2. COI'm fairly inexperienced, so I don't really know how else to do it. I had the int c and FILE *fp inside doPrint; and moved them thinking it might work. The rest of them only get set once, and just read from that point; it seemed like unnecessary work to keep throwing them around.
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      1. POI'm getting a really odd timing error, where something is executing before I believe it should
      1. USThanasi Poulos
    3. COfunctions can take arguments. Take advantage of this fun fact.
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      1. POI'm getting a really odd timing error, where something is executing before I believe it should
      1. This table or related slice is empty.
 

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