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mv: implement -n option

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function                                             old     new   delta
mv_longopts                                           23      36     +13
mv_main                                              510     520     +10
packed_usage                                       27218   27225      +7

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
This commit is contained in:
Denys Vlasenko 2010-10-26 15:58:47 +02:00
parent a43e969574
commit 4c46d85469
2 changed files with 33 additions and 25 deletions
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46
coreutils/mv.c
View File

@ -16,15 +16,30 @@
#include "libbb.h"
#include "libcoreutils/coreutils.h"
//usage:#define mv_trivial_usage
//usage: "[-fin] SOURCE DEST\n"
//usage: "or: mv [-fin] SOURCE... DIRECTORY"
//usage:#define mv_full_usage "\n\n"
//usage: "Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY\n"
//usage: "\nOptions:"
//usage: "\n -f Don't prompt before overwriting"
//usage: "\n -i Interactive, prompt before overwrite"
//usage: "\n -n Don't overwrite an existing file"
//usage:
//usage:#define mv_example_usage
//usage: "$ mv /tmp/foo /bin/bar\n"
#if ENABLE_FEATURE_MV_LONG_OPTIONS
static const char mv_longopts[] ALIGN1 =
"interactive\0" No_argument "i"
"force\0" No_argument "f"
"no-clobber\0" No_argument "n"
;
#endif
#define OPT_FILEUTILS_FORCE 1
#define OPT_FILEUTILS_INTERACTIVE 2
#define OPT_FILEUTILS_NOCLOBBER 4
int mv_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int mv_main(int argc, char **argv)
@ -40,10 +55,11 @@ int mv_main(int argc, char **argv)
#if ENABLE_FEATURE_MV_LONG_OPTIONS
applet_long_options = mv_longopts;
#endif
// Need at least two arguments
// -f unsets -i, -i unsets -f
opt_complementary = "-2:f-i:i-f";
flags = getopt32(argv, "fi");
/* Need at least two arguments.
* If more than one of -f, -i, -n is specified , only the final one
* takes effect (it unsets previous options). */
opt_complementary = "-2:f-in:i-fn:n-fi";
flags = getopt32(argv, "fin");
argc -= optind;
argv += optind;
last = argv[argc - 1];
@ -68,18 +84,22 @@ int mv_main(int argc, char **argv)
}
DO_MOVE:
if (dest_exists
&& !(flags & OPT_FILEUTILS_FORCE)
&& ((access(dest, W_OK) < 0 && isatty(0))
|| (flags & OPT_FILEUTILS_INTERACTIVE))
) {
if (fprintf(stderr, "mv: overwrite '%s'? ", dest) < 0) {
goto RET_1; /* Ouch! fprintf failed! */
}
if (!bb_ask_confirmation()) {
if (dest_exists) {
if (flags & OPT_FILEUTILS_NOCLOBBER)
goto RET_0;
if (!(flags & OPT_FILEUTILS_FORCE)
&& ((access(dest, W_OK) < 0 && isatty(0))
|| (flags & OPT_FILEUTILS_INTERACTIVE))
) {
if (fprintf(stderr, "mv: overwrite '%s'? ", dest) < 0) {
goto RET_1; /* Ouch! fprintf failed! */
}
if (!bb_ask_confirmation()) {
goto RET_0;
}
}
}
if (rename(*argv, dest) < 0) {
struct stat source_stat;
int source_exists;

12
include/usage.src.h
View File

@ -2695,18 +2695,6 @@ INSERT
"ras3 reset retension rewind rewoffline seek setblk setdensity\n" \
"setpart tell unload unlock weof wset" \
#define mv_trivial_usage \
"[-fi] SOURCE DEST\n" \
"or: mv [-fi] SOURCE... DIRECTORY"
#define mv_full_usage "\n\n" \
"Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY\n" \
"\nOptions:" \
"\n -f Don't prompt before overwriting" \
"\n -i Interactive, prompt before overwrite" \
#define mv_example_usage \
"$ mv /tmp/foo /bin/bar\n"
#define nameif_trivial_usage \
"[-s] [-c FILE] [{IFNAME MACADDR}]"
#define nameif_full_usage "\n\n" \