diff options
Diffstat (limited to 'coreutils/head.c')
| -rw-r--r-- | coreutils/head.c | 134 |
1 files changed, 69 insertions, 65 deletions
diff --git a/coreutils/head.c b/coreutils/head.c index b80d065..82a73de 100644 --- a/coreutils/head.c +++ b/coreutils/head.c @@ -1,3 +1,4 @@ +/* vi: set sw=4 ts=4: */ /* * Mini head implementation for busybox * @@ -26,83 +27,86 @@ #include <stdio.h> const char head_usage[] = -"head [OPTION] [FILE]...\n\n" -"Print first 10 lines of each FILE to standard output.\n" -"With more than one FILE, precede each with a header giving the\n" -"file name. With no FILE, or when FILE is -, read standard input.\n\n" -"Options:\n" -"\t-n NUM\t\tPrint first NUM lines instead of first 10\n"; + "head [OPTION] [FILE]...\n\n" + "Print first 10 lines of each FILE to standard output.\n" + "With more than one FILE, precede each with a header giving the\n" + "file name. With no FILE, or when FILE is -, read standard input.\n\n" -int -head(int len, FILE *src) + "Options:\n" "\t-n NUM\t\tPrint first NUM lines instead of first 10\n"; + +int head(int len, FILE * src) { - int i; - char buffer[1024]; + int i; + char buffer[1024]; - for (i = 0; i < len; i++) { - fgets(buffer, 1024, src); - if (feof(src)) { break; } - fputs(buffer, stdout); - } - return 0; + for (i = 0; i < len; i++) { + fgets(buffer, 1024, src); + if (feof(src)) { + break; + } + fputs(buffer, stdout); + } + return 0; } /* BusyBoxed head(1) */ -int -head_main(int argc, char **argv) +int head_main(int argc, char **argv) { - char opt; - int len = 10, tmplen, i; + char opt; + int len = 10, tmplen, i; - /* parse argv[] */ - for (i = 1; i < argc; i++) { - if (argv[i][0] == '-') { - opt = argv[i][1]; - switch (opt) { - case 'n': - tmplen = 0; - if (++i < argc) - tmplen = atoi(argv[i]); - if (tmplen < 1) - usage(head_usage); - len = tmplen; - break; - case '-': - case 'h': - usage(head_usage); - default: - fprintf(stderr, "head: invalid option -- %c\n", opt); - usage(head_usage); - } - } else { - break; + /* parse argv[] */ + for (i = 1; i < argc; i++) { + if (argv[i][0] == '-') { + opt = argv[i][1]; + switch (opt) { + case 'n': + tmplen = 0; + if (++i < argc) + tmplen = atoi(argv[i]); + if (tmplen < 1) + usage(head_usage); + len = tmplen; + break; + case '-': + case 'h': + usage(head_usage); + default: + fprintf(stderr, "head: invalid option -- %c\n", opt); + usage(head_usage); + } + } else { + break; + } } - } - /* get rest of argv[] or stdin if nothing's left */ - if (i >= argc) { - head(len, stdin); + /* get rest of argv[] or stdin if nothing's left */ + if (i >= argc) { + head(len, stdin); - } else { - int need_headers = ((argc - i) > 1); - for ( ; i < argc; i++) { - FILE *src; - src = fopen(argv[i], "r"); - if (!src) { - fprintf(stderr,"head: %s: %s\n", argv[i], strerror(errno)); - } else { - /* emulating GNU behaviour */ - if (need_headers) { - fprintf(stdout, "==> %s <==\n", argv[i]); - } - head(len, src); - if (i < argc - 1) { - fprintf(stdout, "\n"); + } else { + int need_headers = ((argc - i) > 1); + + for (; i < argc; i++) { + FILE *src; + + src = fopen(argv[i], "r"); + if (!src) { + fprintf(stderr, "head: %s: %s\n", argv[i], + strerror(errno)); + } else { + /* emulating GNU behaviour */ + if (need_headers) { + fprintf(stdout, "==> %s <==\n", argv[i]); + } + head(len, src); + if (i < argc - 1) { + fprintf(stdout, "\n"); + } + } } - } } - } - exit(0); + exit(0); } -/* $Id: head.c,v 1.7 2000/02/07 05:29:42 erik Exp $ */ +/* $Id: head.c,v 1.8 2000/02/08 19:58:47 erik Exp $ */ |