Some formatting updates (ran the code through indent)
-Erik
This commit is contained in:
134
head.c
134
head.c
@ -1,3 +1,4 @@
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/* vi: set sw=4 ts=4: */
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/*
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* Mini head implementation for busybox
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*
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@ -26,83 +27,86 @@
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#include <stdio.h>
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const char head_usage[] =
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"head [OPTION] [FILE]...\n\n"
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"Print first 10 lines of each FILE to standard output.\n"
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"With more than one FILE, precede each with a header giving the\n"
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"file name. With no FILE, or when FILE is -, read standard input.\n\n"
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"Options:\n"
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"\t-n NUM\t\tPrint first NUM lines instead of first 10\n";
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"head [OPTION] [FILE]...\n\n"
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"Print first 10 lines of each FILE to standard output.\n"
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"With more than one FILE, precede each with a header giving the\n"
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"file name. With no FILE, or when FILE is -, read standard input.\n\n"
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int
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head(int len, FILE *src)
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"Options:\n" "\t-n NUM\t\tPrint first NUM lines instead of first 10\n";
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int head(int len, FILE * src)
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{
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int i;
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char buffer[1024];
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int i;
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char buffer[1024];
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for (i = 0; i < len; i++) {
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fgets(buffer, 1024, src);
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if (feof(src)) { break; }
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fputs(buffer, stdout);
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}
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return 0;
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for (i = 0; i < len; i++) {
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fgets(buffer, 1024, src);
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if (feof(src)) {
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break;
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}
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fputs(buffer, stdout);
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}
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return 0;
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}
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/* BusyBoxed head(1) */
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int
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head_main(int argc, char **argv)
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int head_main(int argc, char **argv)
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{
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char opt;
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int len = 10, tmplen, i;
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char opt;
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int len = 10, tmplen, i;
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/* parse argv[] */
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for (i = 1; i < argc; i++) {
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if (argv[i][0] == '-') {
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opt = argv[i][1];
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switch (opt) {
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case 'n':
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tmplen = 0;
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if (++i < argc)
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tmplen = atoi(argv[i]);
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if (tmplen < 1)
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usage(head_usage);
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len = tmplen;
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break;
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case '-':
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case 'h':
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usage(head_usage);
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default:
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fprintf(stderr, "head: invalid option -- %c\n", opt);
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usage(head_usage);
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}
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} else {
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break;
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}
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}
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/* get rest of argv[] or stdin if nothing's left */
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if (i >= argc) {
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head(len, stdin);
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/* parse argv[] */
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for (i = 1; i < argc; i++) {
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if (argv[i][0] == '-') {
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opt = argv[i][1];
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switch (opt) {
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case 'n':
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tmplen = 0;
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if (++i < argc)
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tmplen = atoi(argv[i]);
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if (tmplen < 1)
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usage(head_usage);
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len = tmplen;
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break;
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case '-':
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case 'h':
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usage(head_usage);
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default:
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fprintf(stderr, "head: invalid option -- %c\n", opt);
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usage(head_usage);
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}
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} else {
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break;
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}
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}
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int need_headers = ((argc - i) > 1);
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/* get rest of argv[] or stdin if nothing's left */
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if (i >= argc) {
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head(len, stdin);
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for (; i < argc; i++) {
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FILE *src;
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} else {
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int need_headers = ((argc - i) > 1);
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for ( ; i < argc; i++) {
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FILE *src;
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src = fopen(argv[i], "r");
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if (!src) {
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fprintf(stderr,"head: %s: %s\n", argv[i], strerror(errno));
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} else {
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/* emulating GNU behaviour */
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if (need_headers) {
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fprintf(stdout, "==> %s <==\n", argv[i]);
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src = fopen(argv[i], "r");
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if (!src) {
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fprintf(stderr, "head: %s: %s\n", argv[i],
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strerror(errno));
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} else {
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/* emulating GNU behaviour */
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if (need_headers) {
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fprintf(stdout, "==> %s <==\n", argv[i]);
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}
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head(len, src);
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if (i < argc - 1) {
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fprintf(stdout, "\n");
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}
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}
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}
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head(len, src);
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if (i < argc - 1) {
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fprintf(stdout, "\n");
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}
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}
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}
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}
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exit(0);
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exit(0);
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}
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/* $Id: head.c,v 1.7 2000/02/07 05:29:42 erik Exp $ */
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/* $Id: head.c,v 1.8 2000/02/08 19:58:47 erik Exp $ */
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