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| author | Charlie Shepherd <masterdriverz@gentoo.org> | 2007-11-10 10:03:01 +0000 |
|---|---|---|
| committer | Charlie Shepherd <masterdriverz@gentoo.org> | 2007-11-10 10:03:01 +0000 |
| commit | 627dc77bb6749dbb2cb41d2bbca0c8e41c7504ca (patch) | |
| tree | 7f3109dbd4b0b16e535e2933628f18c8e7424134 | |
| parent | ded91bd8208b1d8a1c7b145f3ee5741b6ad57591 (diff) | |
| download | toybox-627dc77bb6749dbb2cb41d2bbca0c8e41c7504ca.tar.gz | |
Add an option to let touch extend or truncate a file and rename the err label to time_error to reduce confusion.
| -rw-r--r-- | toys/Config.in | 4 | ||||
| -rw-r--r-- | toys/touch.c | 21 | ||||
| -rw-r--r-- | toys/toylist.h | 3 |
3 files changed, 21 insertions, 7 deletions
diff --git a/toys/Config.in b/toys/Config.in index 8108a92b..84b3f28f 100644 --- a/toys/Config.in +++ b/toys/Config.in @@ -261,9 +261,9 @@ config TOUCH bool "touch" default y help - usage: touch [-acmrt] FILE... + usage: touch [-acmrtl] FILE... - Change file timestamps and ensure file existance. + Change file timestamps, ensure file existance and change file length. -a Only change the access time. -c Do not create the file if it doesn't exist. diff --git a/toys/touch.c b/toys/touch.c index b4e3d971..514ee1be 100644 --- a/toys/touch.c +++ b/toys/touch.c @@ -5,7 +5,9 @@ * Copyright (C) 2007 Charlie Shepherd <masterdriverz@gentoo.org> */ -#define _XOPEN_SOURCE +#define _XOPEN_SOURCE 600 +#include <unistd.h> +#include <sys/types.h> #include <sys/stat.h> #include <utime.h> #include <time.h> @@ -16,17 +18,24 @@ #define ATIME 0x04 #define REFERENCE 0x08 #define TIME 0x10 +#define LENGTH 0x20 int touch_main(void) { char *arg; int i, set_a, set_m, create; time_t curr_a, curr_m; + off_t length; set_a = !!(toys.optflags & ATIME); set_m = !!(toys.optflags & MTIME); create = !(toys.optflags & NO_CREATE); + if (toys.optflags & LENGTH) + length = toy.touch.length; + else + length = -1; + if (toys.optflags & REFERENCE) { struct stat sb; if (toys.optflags & TIME) @@ -40,13 +49,13 @@ int touch_main(void) char *c; curr = time(NULL); if (!localtime_r(&curr, &t)) - goto err; + goto time_error; c = strptime(toy.touch.time, "%m%d%H%M", &t); if (!c || *c) - goto err; + goto time_error; curr_a = curr_m = mktime(&t); if (curr_a == -1) -err: +time_error: error_exit("Error converting time %s to internal format", toy.touch.time); } else { @@ -77,7 +86,11 @@ err: buf.actime = sb.st_atime; } + if (length != -1) + if (truncate(arg, length)) + goto error; if (utime(arg, &buf)) +error: perror_exit(arg); } diff --git a/toys/toylist.h b/toys/toylist.h index 2c308ef7..97838ce9 100644 --- a/toys/toylist.h +++ b/toys/toylist.h @@ -55,6 +55,7 @@ struct sleep_data { struct touch_data { char *ref_file; char *time; + long length; }; struct toysh_data { @@ -116,7 +117,7 @@ USE_READLINK(NEWTOY(readlink, "<1f", TOYFLAG_BIN)) USE_TOYSH(OLDTOY(sh, toysh, "c:i", TOYFLAG_BIN)) USE_SLEEP(NEWTOY(sleep, "<1", TOYFLAG_BIN)) USE_SYNC(NEWTOY(sync, NULL, TOYFLAG_BIN)) -USE_TOUCH(NEWTOY(touch, "t:r:mca", TOYFLAG_BIN)) +USE_TOUCH(NEWTOY(touch, "l#t:r:mca", TOYFLAG_BIN)) USE_TOYSH(NEWTOY(toysh, "c:i", TOYFLAG_BIN)) USE_TRUE(NEWTOY(true, NULL, TOYFLAG_BIN)) USE_WHICH(NEWTOY(which, "a", TOYFLAG_USR|TOYFLAG_BIN)) |