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cat: ARGBEGIN

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This commit is contained in:
Connor Lane Smith 2012-05-31 19:38:18 +01:00
parent 79e2f3ec19
commit 171ef71c74
1 changed files with 11 additions and 7 deletions
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18
cat.c
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@ -9,15 +9,19 @@ int
main(int argc, char *argv[]) main(int argc, char *argv[])
{ {
FILE *fp; FILE *fp;
int i;
if(getopt(argc, argv, "") != -1) ARGBEGIN {
exit(EXIT_FAILURE); default:
if(optind == argc) eprintf("usage: %s [files...]\n", argv0);
} ARGEND;
if(argc == 0)
concat(stdin, "<stdin>", stdout, "<stdout>"); concat(stdin, "<stdin>", stdout, "<stdout>");
else for(; optind < argc; optind++) { else for(i = 0; i < argc; i++) {
if(!(fp = fopen(argv[optind], "r"))) if(!(fp = fopen(argv[i], "r")))
eprintf("fopen %s:", argv[optind]); eprintf("fopen %s:", argv[i]);
concat(fp, argv[optind], stdout, "<stdout>"); concat(fp, argv[i], stdout, "<stdout>");
fclose(fp); fclose(fp);
} }
return EXIT_SUCCESS; return EXIT_SUCCESS;