Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
John Beppu | 059f152 | 1999-12-10 05:27:16 +0000 | [diff] [blame] | 2 | /* |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 3 | * tee implementation for busybox |
John Beppu | 059f152 | 1999-12-10 05:27:16 +0000 | [diff] [blame] | 4 | * |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 5 | * Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org> |
John Beppu | 059f152 | 1999-12-10 05:27:16 +0000 | [diff] [blame] | 6 | * |
Denys Vlasenko | 0ef64bd | 2010-08-16 20:14:46 +0200 | [diff] [blame] | 7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
John Beppu | 059f152 | 1999-12-10 05:27:16 +0000 | [diff] [blame] | 8 | */ |
| 9 | |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 10 | /* BB_AUDIT SUSv3 compliant */ |
| 11 | /* http://www.opengroup.org/onlinepubs/007904975/utilities/tee.html */ |
| 12 | |
Pere Orga | 3442538 | 2011-03-31 14:43:25 +0200 | [diff] [blame] | 13 | //usage:#define tee_trivial_usage |
| 14 | //usage: "[-ai] [FILE]..." |
| 15 | //usage:#define tee_full_usage "\n\n" |
| 16 | //usage: "Copy stdin to each FILE, and also to stdout\n" |
Pere Orga | 3442538 | 2011-03-31 14:43:25 +0200 | [diff] [blame] | 17 | //usage: "\n -a Append to the given FILEs, don't overwrite" |
| 18 | //usage: "\n -i Ignore interrupt signals (SIGINT)" |
| 19 | //usage: |
| 20 | //usage:#define tee_example_usage |
| 21 | //usage: "$ echo \"Hello\" | tee /tmp/foo\n" |
| 22 | //usage: "$ cat /tmp/foo\n" |
| 23 | //usage: "Hello\n" |
| 24 | |
Denis Vlasenko | b6adbf1 | 2007-05-26 19:00:18 +0000 | [diff] [blame] | 25 | #include "libbb.h" |
Denys Vlasenko | e6a2f4c | 2016-04-21 16:26:30 +0200 | [diff] [blame] | 26 | #include "common_bufsiz.h" |
John Beppu | a3e0d79 | 1999-12-10 07:41:03 +0000 | [diff] [blame] | 27 | |
Denis Vlasenko | 9b49a5e | 2007-10-11 10:05:36 +0000 | [diff] [blame] | 28 | int tee_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 29 | int tee_main(int argc, char **argv) |
John Beppu | 059f152 | 1999-12-10 05:27:16 +0000 | [diff] [blame] | 30 | { |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 31 | const char *mode = "w\0a"; |
Matt Kraai | 1638488 | 2000-08-28 03:53:27 +0000 | [diff] [blame] | 32 | FILE **files; |
Denis Vlasenko | 2d27e4c | 2006-11-25 23:50:28 +0000 | [diff] [blame] | 33 | FILE **fp; |
| 34 | char **names; |
| 35 | char **np; |
Bernhard Reutner-Fischer | b31c252 | 2007-01-20 21:30:49 +0000 | [diff] [blame] | 36 | char retval; |
Denis Vlasenko | 4daad90 | 2007-09-27 10:20:47 +0000 | [diff] [blame] | 37 | //TODO: make unconditional |
Denis Vlasenko | 2d27e4c | 2006-11-25 23:50:28 +0000 | [diff] [blame] | 38 | #if ENABLE_FEATURE_TEE_USE_BLOCK_IO |
Manuel Novoa III | d709743 | 2004-05-26 15:21:19 +0000 | [diff] [blame] | 39 | ssize_t c; |
Denys Vlasenko | e6a2f4c | 2016-04-21 16:26:30 +0200 | [diff] [blame] | 40 | # define buf bb_common_bufsiz1 |
| 41 | # define sizeof_buf COMMON_BUFSIZE |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 42 | #else |
| 43 | int c; |
| 44 | #endif |
Denis Vlasenko | fe7cd64 | 2007-08-18 15:32:12 +0000 | [diff] [blame] | 45 | retval = getopt32(argv, "ia"); /* 'a' must be 2nd */ |
Denis Vlasenko | 2d27e4c | 2006-11-25 23:50:28 +0000 | [diff] [blame] | 46 | argc -= optind; |
| 47 | argv += optind; |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 48 | |
Bernhard Reutner-Fischer | b31c252 | 2007-01-20 21:30:49 +0000 | [diff] [blame] | 49 | mode += (retval & 2); /* Since 'a' is the 2nd option... */ |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 50 | |
Bernhard Reutner-Fischer | b31c252 | 2007-01-20 21:30:49 +0000 | [diff] [blame] | 51 | if (retval & 1) { |
Denis Vlasenko | 25591c3 | 2008-02-16 22:58:56 +0000 | [diff] [blame] | 52 | signal(SIGINT, SIG_IGN); /* TODO - switch to sigaction. (why?) */ |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 53 | } |
Bernhard Reutner-Fischer | b31c252 | 2007-01-20 21:30:49 +0000 | [diff] [blame] | 54 | retval = EXIT_SUCCESS; |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 55 | /* gnu tee ignores SIGPIPE in case one of the output files is a pipe |
| 56 | * that doesn't consume all its input. Good idea... */ |
Denis Vlasenko | 25591c3 | 2008-02-16 22:58:56 +0000 | [diff] [blame] | 57 | signal(SIGPIPE, SIG_IGN); |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 58 | |
Denys Vlasenko | ea69416 | 2010-10-17 12:45:24 +0200 | [diff] [blame] | 59 | /* Allocate an array of FILE *'s, with one extra for a sentinel. */ |
Denis Vlasenko | 2d27e4c | 2006-11-25 23:50:28 +0000 | [diff] [blame] | 60 | fp = files = xzalloc(sizeof(FILE *) * (argc + 2)); |
| 61 | np = names = argv - 1; |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 62 | |
Denis Vlasenko | 2d27e4c | 2006-11-25 23:50:28 +0000 | [diff] [blame] | 63 | files[0] = stdout; |
| 64 | goto GOT_NEW_FILE; |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 65 | do { |
Denis Vlasenko | 4b8171c | 2008-07-15 05:10:15 +0000 | [diff] [blame] | 66 | *fp = stdout; |
| 67 | if (NOT_LONE_DASH(*argv)) { |
| 68 | *fp = fopen_or_warn(*argv, mode); |
| 69 | if (*fp == NULL) { |
| 70 | retval = EXIT_FAILURE; |
Denis Vlasenko | 8ddb641 | 2008-07-16 07:34:00 +0000 | [diff] [blame] | 71 | argv++; |
Denis Vlasenko | 4b8171c | 2008-07-15 05:10:15 +0000 | [diff] [blame] | 72 | continue; |
| 73 | } |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 74 | } |
Denis Vlasenko | 2d27e4c | 2006-11-25 23:50:28 +0000 | [diff] [blame] | 75 | *np = *argv++; |
| 76 | GOT_NEW_FILE: |
Denis Vlasenko | 8ddb641 | 2008-07-16 07:34:00 +0000 | [diff] [blame] | 77 | setbuf(*fp, NULL); /* tee must not buffer output. */ |
| 78 | fp++; |
Denis Vlasenko | 2d27e4c | 2006-11-25 23:50:28 +0000 | [diff] [blame] | 79 | np++; |
| 80 | } while (*argv); |
| 81 | /* names[0] will be filled later */ |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 82 | |
Denis Vlasenko | 2d27e4c | 2006-11-25 23:50:28 +0000 | [diff] [blame] | 83 | #if ENABLE_FEATURE_TEE_USE_BLOCK_IO |
Denys Vlasenko | e6a2f4c | 2016-04-21 16:26:30 +0200 | [diff] [blame] | 84 | while ((c = safe_read(STDIN_FILENO, buf, sizeof_buf)) > 0) { |
Denis Vlasenko | 2d27e4c | 2006-11-25 23:50:28 +0000 | [diff] [blame] | 85 | fp = files; |
| 86 | do |
Dan Fandrich | 77d4872 | 2010-09-07 23:38:28 -0700 | [diff] [blame] | 87 | fwrite(buf, 1, c, *fp); |
| 88 | while (*++fp); |
John Beppu | 059f152 | 1999-12-10 05:27:16 +0000 | [diff] [blame] | 89 | } |
Denis Vlasenko | 2d27e4c | 2006-11-25 23:50:28 +0000 | [diff] [blame] | 90 | if (c < 0) { /* Make sure read errors are signaled. */ |
Manuel Novoa III | d709743 | 2004-05-26 15:21:19 +0000 | [diff] [blame] | 91 | retval = EXIT_FAILURE; |
| 92 | } |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 93 | #else |
Eric Andersen | 637d226 | 2003-10-22 10:18:24 +0000 | [diff] [blame] | 94 | setvbuf(stdout, NULL, _IONBF, 0); |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 95 | while ((c = getchar()) != EOF) { |
Denis Vlasenko | 2d27e4c | 2006-11-25 23:50:28 +0000 | [diff] [blame] | 96 | fp = files; |
| 97 | do |
Dan Fandrich | 77d4872 | 2010-09-07 23:38:28 -0700 | [diff] [blame] | 98 | putc(c, *fp); |
| 99 | while (*++fp); |
Eric Andersen | 2cb5507 | 1999-12-10 08:25:07 +0000 | [diff] [blame] | 100 | } |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 101 | #endif |
John Beppu | 059f152 | 1999-12-10 05:27:16 +0000 | [diff] [blame] | 102 | |
Eric Andersen | c7bda1c | 2004-03-15 08:29:22 +0000 | [diff] [blame] | 103 | /* Now we need to check for i/o errors on stdin and the various |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 104 | * output files. Since we know that the first entry in the output |
| 105 | * file table is stdout, we can save one "if ferror" test by |
| 106 | * setting the first entry to stdin and checking stdout error |
Denis Vlasenko | f0ed376 | 2006-10-26 23:21:47 +0000 | [diff] [blame] | 107 | * status with fflush_stdout_and_exit()... although fflush()ing |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 108 | * is unnecessary here. */ |
Denis Vlasenko | 2d27e4c | 2006-11-25 23:50:28 +0000 | [diff] [blame] | 109 | np = names; |
| 110 | fp = files; |
| 111 | names[0] = (char *) bb_msg_standard_input; |
| 112 | files[0] = stdin; |
| 113 | do { /* Now check for input and output errors. */ |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 114 | /* Checking ferror should be sufficient, but we may want to fclose. |
| 115 | * If we do, remember not to close stdin! */ |
Denis Vlasenko | 2d27e4c | 2006-11-25 23:50:28 +0000 | [diff] [blame] | 116 | die_if_ferror(*fp++, *np++); |
| 117 | } while (*fp); |
Manuel Novoa III | cad5364 | 2003-03-19 09:13:01 +0000 | [diff] [blame] | 118 | |
Denis Vlasenko | f0ed376 | 2006-10-26 23:21:47 +0000 | [diff] [blame] | 119 | fflush_stdout_and_exit(retval); |
John Beppu | 059f152 | 1999-12-10 05:27:16 +0000 | [diff] [blame] | 120 | } |