X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=editors%2Fsed.c;h=0f0f4a28d19829907293ab7335e1fe544aee2ad8;hb=f1bbb22dca4d39aa227246f4c2ee90acd7e512a4;hp=a7152e52a038b9b7e7f0cd4d0a655fc92154ef24;hpb=1fa1adea2ae16d4f4c82d7466905dce4c6edd5f5;p=oweals%2Fbusybox.git diff --git a/editors/sed.c b/editors/sed.c index a7152e52a..0f0f4a28d 100644 --- a/editors/sed.c +++ b/editors/sed.c @@ -1,8 +1,8 @@ /* * sed.c - very minimalist version of sed * - * Copyright (C) 1999,2000 by Lineo, inc. - * Written by Mark Whitley , + * Copyright (C) 1999,2000,2001 by Lineo, inc. + * Written by Mark Whitley , * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -36,11 +36,9 @@ Unsupported features: - transliteration (y/source-chars/dest-chars/) (use 'tr') - - no support for characters other than the '/' character for regex matches - no pattern space hold space storing / swapping (x, etc.) - no labels / branching (: label, b, t, and friends) - and lots, lots more. - */ #include @@ -49,9 +47,11 @@ #include /* for strdup() */ #include #include /* for isspace() */ +#include #include "busybox.h" /* externs */ +extern void xregcomp(regex_t *preg, const char *regex, int cflags); extern int optind; /* in unistd.h */ extern char *optarg; /* ditto */ @@ -63,6 +63,7 @@ struct sed_cmd { /* GENERAL FIELDS */ + char delimiter; /* The delimiter used to separate regexps */ /* address storage */ int beg_line; /* 'sed 1p' 0 == no begining line, apply commands to all lines */ @@ -128,64 +129,17 @@ static void destroy_cmd_strs() } #endif -#if 0 -/* - * trim_str - trims leading and trailing space from a string - * - * Note: This returns a malloc'ed string so you must store and free it - * XXX: This should be in the utility.c file. - * XXX: This is now obsolete. Maybe it belongs nowhere. - */ -static char *trim_str(const char *str) -{ - int i; - char *retstr = strdup(str); - - /* trim leading whitespace */ - memmove(retstr, &retstr[strspn(retstr, " \n\t\v")], strlen(retstr)); - - /* trim trailing whitespace */ - i = strlen(retstr) - 1; - while (isspace(retstr[i])) - i--; - retstr[++i] = 0; - - /* Aside: - * - * you know, a strrspn() would really be nice cuz then we could say: - * - * retstr[strrspn(retstr, " \n\t\v") + 1] = 0; - */ - - return retstr; -} -#endif -#if 0 /* - * strrspn - works just like strspn() but goes from right to left instead of - * left to right + * index_of_next_unescaped_regexp_delim - walks left to right through a string + * beginning at a specified index and returns the index of the next regular + * expression delimiter (typically a forward * slash ('/')) not preceeded by + * a backslash ('\'). */ -static size_t strrspn(const char *s, const char *accept) -{ - size_t i = strlen(s); - - while (strchr(accept, s[--i])) - ; - - return i; -} -#endif - -/* - * index_of_next_unescaped_slash - walks left to right through a string - * beginning at a specified index and returns the index of the next forward - * slash ('/') not preceeded by a backslash ('\'). - */ -static int index_of_next_unescaped_slash(const char *str, int idx) +static int index_of_next_unescaped_regexp_delim(struct sed_cmd *sed_cmd, const char *str, int idx) { for ( ; str[idx]; idx++) { - if (str[idx] == '/' && str[idx-1] != '\\') + if (str[idx] == sed_cmd->delimiter && str[idx-1] != '\\') return idx; } @@ -196,7 +150,7 @@ static int index_of_next_unescaped_slash(const char *str, int idx) /* * returns the index in the string just past where the address ends. */ -static int get_address(const char *str, int *line, regex_t **regex) +static int get_address(struct sed_cmd *sed_cmd, const char *str, int *line, regex_t **regex) { char *my_str = strdup(str); int idx = 0; @@ -213,9 +167,9 @@ static int get_address(const char *str, int *line, regex_t **regex) idx++; } else if (my_str[idx] == '/') { - idx = index_of_next_unescaped_slash(my_str, ++idx); + idx = index_of_next_unescaped_regexp_delim(sed_cmd, my_str, ++idx); if (idx == -1) - error_msg_and_die("unterminated match expression\n"); + error_msg_and_die("unterminated match expression"); my_str[idx] = '\0'; *regex = (regex_t *)xmalloc(sizeof(regex_t)); xregcomp(*regex, my_str+1, 0); @@ -223,7 +177,7 @@ static int get_address(const char *str, int *line, regex_t **regex) } else { error_msg("get_address: no address found in string\n" - "\t(you probably didn't check the string you passed me)\n"); + "\t(you probably didn't check the string you passed me)"); idx = -1; } @@ -256,15 +210,18 @@ static int parse_subst_cmd(struct sed_cmd *sed_cmd, const char *substr) * (all three of the '/' slashes are mandatory) */ - /* verify that the 's' is followed by a 'slash' */ - if (substr[++idx] != '/') - error_msg_and_die("bad format in substitution expression\n"); + /* verify that the 's' is followed by something. That something + * (typically a 'slash') is now our regexp delimiter... */ + if (!substr[++idx]) + error_msg_and_die("bad format in substitution expression"); + else + sed_cmd->delimiter=substr[idx]; /* save the match string */ oldidx = idx+1; - idx = index_of_next_unescaped_slash(substr, ++idx); + idx = index_of_next_unescaped_regexp_delim(sed_cmd, substr, ++idx); if (idx == -1) - error_msg_and_die("bad format in substitution expression\n"); + error_msg_and_die("bad format in substitution expression"); match = strdup_substr(substr, oldidx, idx); /* determine the number of back references in the match string */ @@ -281,9 +238,9 @@ static int parse_subst_cmd(struct sed_cmd *sed_cmd, const char *substr) /* save the replacement string */ oldidx = idx+1; - idx = index_of_next_unescaped_slash(substr, ++idx); + idx = index_of_next_unescaped_regexp_delim(sed_cmd, substr, ++idx); if (idx == -1) - error_msg_and_die("bad format in substitution expression\n"); + error_msg_and_die("bad format in substitution expression"); sed_cmd->replace = strdup_substr(substr, oldidx, idx); /* process the flags */ @@ -303,7 +260,7 @@ static int parse_subst_cmd(struct sed_cmd *sed_cmd, const char *substr) if (strchr("; \t\v\n\r", substr[idx])) goto out; /* else */ - error_msg_and_die("bad option in substitution expression\n"); + error_msg_and_die("bad option in substitution expression"); } } @@ -345,7 +302,7 @@ static int parse_edit_cmd(struct sed_cmd *sed_cmd, const char *editstr) */ if (editstr[1] != '\\' && (editstr[2] != '\n' || editstr[2] != '\r')) - error_msg_and_die("bad format in edit expression\n"); + error_msg_and_die("bad format in edit expression"); /* store the edit line text */ /* make editline big enough to accomodate the extra '\n' we will tack on @@ -401,17 +358,17 @@ static char *parse_cmd_str(struct sed_cmd *sed_cmd, const char *cmdstr) /* first part (if present) is an address: either a number or a /regex/ */ if (isdigit(cmdstr[idx]) || cmdstr[idx] == '/') - idx = get_address(cmdstr, &sed_cmd->beg_line, &sed_cmd->beg_match); + idx = get_address(sed_cmd, cmdstr, &sed_cmd->beg_line, &sed_cmd->beg_match); /* second part (if present) will begin with a comma */ if (cmdstr[idx] == ',') - idx += get_address(&cmdstr[++idx], &sed_cmd->end_line, &sed_cmd->end_match); + idx += get_address(sed_cmd, &cmdstr[++idx], &sed_cmd->end_line, &sed_cmd->end_match); /* last part (mandatory) will be a command */ if (cmdstr[idx] == '\0') - error_msg_and_die("missing command\n"); + error_msg_and_die("missing command"); if (!strchr("pdsaic", cmdstr[idx])) /* <-- XXX add new commands here */ - error_msg_and_die("invalid command\n"); + error_msg_and_die("invalid command"); sed_cmd->cmd = cmdstr[idx]; /* special-case handling for (s)ubstitution */ @@ -421,7 +378,7 @@ static char *parse_cmd_str(struct sed_cmd *sed_cmd, const char *cmdstr) /* special-case handling for (a)ppend, (i)nsert, and (c)hange */ else if (strchr("aic", cmdstr[idx])) { if (sed_cmd->end_line || sed_cmd->end_match) - error_msg_and_die("only a beginning address can be specified for edit commands\n"); + error_msg_and_die("only a beginning address can be specified for edit commands"); idx += parse_edit_cmd(sed_cmd, &cmdstr[idx]); } /* if it was a single-letter command (such as 'p' or 'd') we need to @@ -479,8 +436,7 @@ static void load_cmd_file(char *filename) } /* eat trailing newline (if any) --if I don't do this, edit commands * (aic) will print an extra newline */ - if (line[strlen(line)-1] == '\n') - line[strlen(line)-1] = 0; + chomp(line); add_cmd_str(line); free(line); } @@ -709,18 +665,13 @@ extern int sed_main(int argc, char **argv) #ifdef BB_FEATURE_CLEAN_UP /* destroy command strings on exit */ - if (atexit(destroy_cmd_strs) == -1) { - perror("sed"); - exit(1); - } + if (atexit(destroy_cmd_strs) == -1) + perror_msg_and_die("atexit"); #endif /* do normal option parsing */ - while ((opt = getopt(argc, argv, "hne:f:")) > 0) { + while ((opt = getopt(argc, argv, "ne:f:")) > 0) { switch (opt) { - case 'h': - usage(sed_usage); - break; case 'n': be_quiet++; break; @@ -730,6 +681,8 @@ extern int sed_main(int argc, char **argv) case 'f': load_cmd_file(optarg); break; + default: + show_usage(); } } @@ -737,7 +690,7 @@ extern int sed_main(int argc, char **argv) * argv[optind] should be the pattern. no pattern, no worky */ if (ncmds == 0) { if (argv[optind] == NULL) - usage(sed_usage); + show_usage(); else { add_cmd_str(argv[optind]); optind++;