diff options
Diffstat (limited to 'editors')
| -rw-r--r-- | editors/sed.c | 79 |
1 files changed, 51 insertions, 28 deletions
diff --git a/editors/sed.c b/editors/sed.c index 5c4e9cc3b..1552cf370 100644 --- a/editors/sed.c +++ b/editors/sed.c @@ -75,6 +75,13 @@ #include "libbb.h" #include "xregex.h" +#if 0 +# define dbg(...) bb_error_msg(__VA_ARGS__) +#else +# define dbg(...) ((void)0) +#endif + + enum { OPT_in_place = 1 << 0, }; @@ -89,6 +96,7 @@ typedef struct sed_cmd_s { regex_t *end_match; /* sed -e '/match/,/end_match/cmd' */ regex_t *sub_match; /* For 's/sub_match/string/' */ int beg_line; /* 'sed 1p' 0 == apply commands to all lines */ + int beg_line_orig; /* copy of the above, needed for -i */ int end_line; /* 'sed 1,3p' 0 == one line only. -1 = last line ($) */ FILE *sw_file; /* File (sw) command writes to, -1 for none. */ @@ -123,7 +131,7 @@ struct globals { regex_t *previous_regex_ptr; /* linked list of sed commands */ - sed_cmd_t sed_cmd_head, *sed_cmd_tail; + sed_cmd_t *sed_cmd_head, **sed_cmd_tail; /* Linked list of append lines */ llist_t *append_head; @@ -148,7 +156,7 @@ struct BUG_G_too_big { #if ENABLE_FEATURE_CLEAN_UP static void sed_free_and_close_stuff(void) { - sed_cmd_t *sed_cmd = G.sed_cmd_head.next; + sed_cmd_t *sed_cmd = G.sed_cmd_head; llist_free(G.append_head, free); @@ -599,6 +607,7 @@ static void add_cmd(const char *cmdstr) /* first part (if present) is an address: either a '$', a number or a /regex/ */ cmdstr += get_address(cmdstr, &sed_cmd->beg_line, &sed_cmd->beg_match); + sed_cmd->beg_line_orig = sed_cmd->beg_line; /* second part (if present) will begin with a comma */ if (*cmdstr == ',') { @@ -630,8 +639,8 @@ static void add_cmd(const char *cmdstr) cmdstr = parse_cmd_args(sed_cmd, cmdstr); /* Add the command to the command array */ - G.sed_cmd_tail->next = sed_cmd; - G.sed_cmd_tail = G.sed_cmd_tail->next; + *G.sed_cmd_tail = sed_cmd; + G.sed_cmd_tail = &sed_cmd->next; } /* If we glued multiple lines together, free the memory. */ @@ -777,7 +786,7 @@ static sed_cmd_t *branch_to(char *label) { sed_cmd_t *sed_cmd; - for (sed_cmd = G.sed_cmd_head.next; sed_cmd; sed_cmd = sed_cmd->next) { + for (sed_cmd = G.sed_cmd_head; sed_cmd; sed_cmd = sed_cmd->next) { if (sed_cmd->cmd == ':' && sed_cmd->string && !strcmp(sed_cmd->string, label)) { return sed_cmd; } @@ -953,24 +962,24 @@ static void process_files(void) /* For every line, go through all the commands */ restart: - for (sed_cmd = G.sed_cmd_head.next; sed_cmd; sed_cmd = sed_cmd->next) { + for (sed_cmd = G.sed_cmd_head; sed_cmd; sed_cmd = sed_cmd->next) { int old_matched, matched; old_matched = sed_cmd->in_match; /* Determine if this command matches this line: */ - //bb_error_msg("match1:%d", sed_cmd->in_match); - //bb_error_msg("match2:%d", (!sed_cmd->beg_line && !sed_cmd->end_line - // && !sed_cmd->beg_match && !sed_cmd->end_match)); - //bb_error_msg("match3:%d", (sed_cmd->beg_line > 0 - // && (sed_cmd->end_line || sed_cmd->end_match - // ? (sed_cmd->beg_line <= linenum) - // : (sed_cmd->beg_line == linenum) - // ) - // ) - //bb_error_msg("match4:%d", (beg_match(sed_cmd, pattern_space))); - //bb_error_msg("match5:%d", (sed_cmd->beg_line == -1 && next_line == NULL)); + dbg("match1:%d", sed_cmd->in_match); + dbg("match2:%d", (!sed_cmd->beg_line && !sed_cmd->end_line + && !sed_cmd->beg_match && !sed_cmd->end_match)); + dbg("match3:%d", (sed_cmd->beg_line > 0 + && (sed_cmd->end_line || sed_cmd->end_match + ? (sed_cmd->beg_line <= linenum) + : (sed_cmd->beg_line == linenum) + ) + )); + dbg("match4:%d", (beg_match(sed_cmd, pattern_space))); + dbg("match5:%d", (sed_cmd->beg_line == -1 && next_line == NULL)); /* Are we continuing a previous multi-line match? */ sed_cmd->in_match = sed_cmd->in_match @@ -981,7 +990,14 @@ static void process_files(void) || (sed_cmd->beg_line > 0 && (sed_cmd->end_line || sed_cmd->end_match /* note: even if end is numeric and is < linenum too, - * GNU sed matches! We match too */ + * GNU sed matches! We match too, therefore we don't + * check here that linenum <= end. + * Example: + * printf '1\n2\n3\n4\n' | sed -n '1{N;N;d};1p;2,3p;3p;4p' + * first three input lines are deleted; + * 4th line is matched and printed + * by "2,3" (!) and by "4" ranges + */ ? (sed_cmd->beg_line <= linenum) /* N,end */ : (sed_cmd->beg_line == linenum) /* N */ ) @@ -994,16 +1010,14 @@ static void process_files(void) /* Snapshot the value */ matched = sed_cmd->in_match; - //bb_error_msg("cmd:'%c' matched:%d beg_line:%d end_line:%d linenum:%d", - //sed_cmd->cmd, matched, sed_cmd->beg_line, sed_cmd->end_line, linenum); + dbg("cmd:'%c' matched:%d beg_line:%d end_line:%d linenum:%d", + sed_cmd->cmd, matched, sed_cmd->beg_line, sed_cmd->end_line, linenum); /* Is this line the end of the current match? */ if (matched) { /* once matched, "n,xxx" range is dead, disabling it */ - if (sed_cmd->beg_line > 0 - && !(option_mask32 & OPT_in_place) /* but not for -i */ - ) { + if (sed_cmd->beg_line > 0) { sed_cmd->beg_line = -2; } sed_cmd->in_match = !( @@ -1017,7 +1031,8 @@ static void process_files(void) /* or does this line matches our last address regex */ || (sed_cmd->end_match && old_matched && (regexec(sed_cmd->end_match, - pattern_space, 0, NULL, 0) == 0)) + pattern_space, 0, NULL, 0) == 0) + ) ); } @@ -1407,11 +1422,12 @@ int sed_main(int argc UNUSED_PARAM, char **argv) add_input_file(stdin); } else { int i; - FILE *file; for (i = 0; argv[i]; i++) { struct stat statbuf; int nonstdoutfd; + FILE *file; + sed_cmd_t *sed_cmd; if (LONE_DASH(argv[i]) && !(opt & OPT_in_place)) { add_input_file(stdin); @@ -1423,11 +1439,13 @@ int sed_main(int argc UNUSED_PARAM, char **argv) status = EXIT_FAILURE; continue; } + add_input_file(file); if (!(opt & OPT_in_place)) { - add_input_file(file); continue; } + /* -i: process each FILE separately: */ + G.outname = xasprintf("%sXXXXXX", argv[i]); nonstdoutfd = xmkstemp(G.outname); G.nonstdout = xfdopen_for_write(nonstdoutfd); @@ -1438,15 +1456,20 @@ int sed_main(int argc UNUSED_PARAM, char **argv) * but GNU sed 4.2.1 does not preserve them either */ fchmod(nonstdoutfd, statbuf.st_mode); fchown(nonstdoutfd, statbuf.st_uid, statbuf.st_gid); - add_input_file(file); + process_files(); fclose(G.nonstdout); - G.nonstdout = stdout; + /* unlink(argv[i]); */ xrename(G.outname, argv[i]); free(G.outname); G.outname = NULL; + + /* Re-enable disabled range matches */ + for (sed_cmd = G.sed_cmd_head; sed_cmd; sed_cmd = sed_cmd->next) { + sed_cmd->beg_line = sed_cmd->beg_line_orig; + } } /* Here, to handle "sed 'cmds' nonexistent_file" case we did: * if (G.current_input_file >= G.input_file_count) |