diff options
Diffstat (limited to 'toys/posix/head.c')
-rw-r--r-- | toys/posix/head.c | 67 |
1 files changed, 32 insertions, 35 deletions
diff --git a/toys/posix/head.c b/toys/posix/head.c index 77978f74..ba7b7385 100644 --- a/toys/posix/head.c +++ b/toys/posix/head.c @@ -1,6 +1,4 @@ -/* vi: set sw=4 ts=4: - * - * head.c - copy first lines from input to stdout. +/* head.c - copy first lines from input to stdout. * * Copyright 2006 Timothy Elliott <tle@holymonkey.com> * @@ -9,52 +7,51 @@ USE_HEAD(NEWTOY(head, "n#<0=10", TOYFLAG_BIN)) config HEAD - bool "head" - default y - help - usage: head [-n number] [file...] + bool "head" + default y + help + usage: head [-n number] [file...] - Copy first lines from files to stdout. If no files listed, copy from - stdin. Filename "-" is a synonym for stdin. + Copy first lines from files to stdout. If no files listed, copy from + stdin. Filename "-" is a synonym for stdin. - -n Number of lines to copy. + -n Number of lines to copy. */ #define FOR_head #include "toys.h" GLOBALS( - long lines; - int file_no; + long lines; + int file_no; ) static void do_head(int fd, char *name) { - int i, len, lines=TT.lines, size=sizeof(toybuf); - - if (toys.optc > 1) { - // Print an extra newline for all but the first file - if (TT.file_no++) xprintf("\n"); - xprintf("==> %s <==\n", name); - xflush(); - } - - while (lines) { - len = read(fd, toybuf, size); - if (len<0) { - perror_msg("%s",name); - toys.exitval = EXIT_FAILURE; - } - if (len<1) break; - - for(i=0; i<len;) - if (toybuf[i++] == '\n' && !--lines) break; - - xwrite(1, toybuf, i); - } + int i, len, lines=TT.lines, size=sizeof(toybuf); + + if (toys.optc > 1) { + // Print an extra newline for all but the first file + if (TT.file_no++) xprintf("\n"); + xprintf("==> %s <==\n", name); + xflush(); + } + + while (lines) { + len = read(fd, toybuf, size); + if (len<0) { + perror_msg("%s",name); + toys.exitval = EXIT_FAILURE; + } + if (len<1) break; + + for(i=0; i<len;) if (toybuf[i++] == '\n' && !--lines) break; + + xwrite(1, toybuf, i); + } } void head_main(void) { - loopfiles(toys.optargs, do_head); + loopfiles(toys.optargs, do_head); } |