diff options
| -rw-r--r-- | coreutils/cut.c | 76 |
1 files changed, 37 insertions, 39 deletions
diff --git a/coreutils/cut.c b/coreutils/cut.c index 257f3d6..4f0bed3 100644 --- a/coreutils/cut.c +++ b/coreutils/cut.c @@ -16,13 +16,11 @@ /* option vars */ static const char optstring[] ALIGN1 = "b:c:f:d:sn"; -#define CUT_OPT_BYTE_FLGS (1<<0) -#define CUT_OPT_CHAR_FLGS (1<<1) -#define CUT_OPT_FIELDS_FLGS (1<<2) -#define CUT_OPT_DELIM_FLGS (1<<3) -#define CUT_OPT_SUPPRESS_FLGS (1<<4) - -static char delim = '\t'; /* delimiter, default is tab */ +#define CUT_OPT_BYTE_FLGS (1 << 0) +#define CUT_OPT_CHAR_FLGS (1 << 1) +#define CUT_OPT_FIELDS_FLGS (1 << 2) +#define CUT_OPT_DELIM_FLGS (1 << 3) +#define CUT_OPT_SUPPRESS_FLGS (1 << 4) struct cut_list { int startpos; @@ -47,7 +45,7 @@ static int cmpfunc(const void *a, const void *b) } -static void cut_file(FILE * file) +static void cut_file(FILE *file, char delim) { char *line = NULL; unsigned int linenum = 0; /* keep these zero-based to be consistent */ @@ -163,11 +161,10 @@ static void cut_file(FILE * file) } } -static const char _op_on_field[] ALIGN1 = " only when operating on fields"; - int cut_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int cut_main(int argc, char **argv) { + char delim = '\t'; /* delimiter, default is tab */ char *sopt, *ltok; opt_complementary = "b--bcf:c--bcf:f--bcf"; @@ -178,7 +175,7 @@ int cut_main(int argc, char **argv) bb_error_msg_and_die("expected a list of bytes, characters, or fields"); if (option_mask32 & CUT_OPT_DELIM_FLGS) { - if (strlen(ltok) > 1) { + if (ltok[0] && ltok[1]) { /* more than 1 char? */ bb_error_msg_and_die("the delimiter must be a single character"); } delim = ltok[0]; @@ -186,6 +183,8 @@ int cut_main(int argc, char **argv) /* non-field (char or byte) cutting has some special handling */ if (!(option_mask32 & CUT_OPT_FIELDS_FLGS)) { + static const char _op_on_field[] ALIGN1 = " only when operating on fields"; + if (option_mask32 & CUT_OPT_SUPPRESS_FLGS) { bb_error_msg_and_die ("suppressing non-delimited lines makes sense%s", @@ -210,15 +209,12 @@ int cut_main(int argc, char **argv) while ((ltok = strsep(&sopt, ",")) != NULL) { /* it's actually legal to pass an empty list */ - if (strlen(ltok) == 0) + if (!ltok[0]) continue; /* get the start pos */ ntok = strsep(<ok, "-"); - if (ntok == NULL) { - bb_error_msg - ("internal error: ntok is null for start pos!?\n"); - } else if (strlen(ntok) == 0) { + if (!ntok[0]) { s = BOL; } else { s = xatoi_u(ntok); @@ -229,13 +225,12 @@ int cut_main(int argc, char **argv) } /* get the end pos */ - ntok = strsep(<ok, "-"); - if (ntok == NULL) { + if (ltok == NULL) { e = NON_RANGE; - } else if (strlen(ntok) == 0) { + } else if (!ltok[0]) { e = EOL; } else { - e = xatoi_u(ntok); + e = xatoi_u(ltok); /* if the user specified and end position of 0, that means "til the * end of the line */ if (e == 0) @@ -245,11 +240,6 @@ int cut_main(int argc, char **argv) e = NON_RANGE; } - /* if there's something left to tokenize, the user passed - * an invalid list */ - if (ltok) - bb_error_msg_and_die("invalid byte or field list"); - /* add the new list */ cut_lists = xrealloc(cut_lists, sizeof(struct cut_list) * (++nlists)); cut_lists[nlists-1].startpos = s; @@ -266,23 +256,31 @@ int cut_main(int argc, char **argv) qsort(cut_lists, nlists, sizeof(struct cut_list), cmpfunc); } - /* argv[0..argc-1] should be names of file to process. If no - * files were specified or '-' was specified, take input from stdin. - * Otherwise, we process all the files specified. */ - if (argv[0] == NULL || LONE_DASH(argv[0])) { - cut_file(stdin); - } else { - FILE *file; + { + int retval = EXIT_SUCCESS; + FILE *file = stdin; + + if (!*argv) { + argv--; + goto jump_in; + } do { - file = fopen_or_warn(argv[0], "r"); - if (file) { - cut_file(file); - fclose(file); + file = stdin; + if (NOT_LONE_DASH(*argv)) + file = fopen_or_warn(*argv, "r"); + if (!file) { + retval = EXIT_FAILURE; + continue; } + jump_in: + cut_file(file, delim); + if (NOT_LONE_DASH(*argv)) + fclose(file); } while (*++argv); + + if (ENABLE_FEATURE_CLEAN_UP) + free(cut_lists); + fflush_stdout_and_exit(retval); } - if (ENABLE_FEATURE_CLEAN_UP) - free(cut_lists); - return EXIT_SUCCESS; } |