diff options
| -rw-r--r-- | coreutils/tail.c | 47 |
1 files changed, 21 insertions, 26 deletions
diff --git a/coreutils/tail.c b/coreutils/tail.c index 52bacb7..67396ab 100644 --- a/coreutils/tail.c +++ b/coreutils/tail.c @@ -33,7 +33,10 @@ static const struct suffix_mult tail_suffixes[] = { { NULL, 0 } }; -static int status; +struct globals { + bool status; +}; +#define G (*(struct globals*)&bb_common_bufsiz1) static void tail_xprint_header(const char *fmt, const char *filename) { @@ -54,7 +57,7 @@ static ssize_t tail_read(int fd, char *buf, size_t count) r = safe_read(fd, buf, count); if (r < 0) { bb_perror_msg(bb_msg_read_error); - status = EXIT_FAILURE; + G.status = EXIT_FAILURE; } return r; @@ -64,7 +67,7 @@ static const char header_fmt[] = "\n==> %s <==\n"; static unsigned eat_num(const char *p) { if (*p == '-') p++; - else if (*p == '+') { p++; status = 1; } + else if (*p == '+') { p++; G.status = EXIT_FAILURE; } return xatou_sfx(p, tail_suffixes); } @@ -111,11 +114,12 @@ int tail_main(int argc, char **argv) #endif argc -= optind; argv += optind; - from_top = status; + from_top = G.status; /* open all the files */ fds = xmalloc(sizeof(int) * (argc + 1)); - status = nfiles = i = 0; + nfiles = i = 0; + G.status = EXIT_SUCCESS; if (argc == 0) { struct stat statbuf; @@ -123,23 +127,15 @@ int tail_main(int argc, char **argv) opt &= ~1; /* clear FOLLOW */ } *argv = (char *) bb_msg_standard_input; - goto DO_STDIN; } - do { - if (NOT_LONE_DASH(argv[i])) { - fds[nfiles] = open(argv[i], O_RDONLY); - if (fds[nfiles] < 0) { - bb_perror_msg("%s", argv[i]); - status = EXIT_FAILURE; - continue; - } - } else { - DO_STDIN: /* "-" */ - fds[nfiles] = STDIN_FILENO; + FILE* fil = fopen_or_warn_stdin(argv[i]); + if (!fil) { + G.status = EXIT_FAILURE; + continue; } - argv[nfiles] = argv[i]; - ++nfiles; + fds[nfiles] = fileno(fil); + argv[nfiles++] = argv[i]; } while (++i < argc); if (!nfiles) @@ -217,13 +213,11 @@ int tail_main(int argc, char **argv) if (newline + nbuf < count) { newline += nbuf; taillen += nread; - } else { int extra = 0; - if (buf[nread-1] != '\n') { - extra = 1; - } + if (buf[nread-1] != '\n') + extra = 1; k = newline + nbuf + extra - count; s = tailbuf; while (k) { @@ -232,7 +226,6 @@ int tail_main(int argc, char **argv) } ++s; } - taillen += nread - (s - tailbuf); memmove(tailbuf, s, taillen); newline = count - extra; @@ -273,6 +266,8 @@ int tail_main(int argc, char **argv) } } while (++i < nfiles); } - - return status; + if (ENABLE_FEATURE_CLEAN_UP) { + free(fds); + } + return G.status; } |