Applied patch from Mark Ferrell <mferrell@mvista.com> to use the 'p' option in

substitution expressions.

3 files changed, 81 insertions, 18 deletions

diff --git a/busybox.def.h b/busybox.def.h
index d9477d41c..fd4302a84 100644
--- a/busybox.def.h
+++ b/busybox.def.h
@@ -217,6 +217,9 @@
 // Enable support for "--exclude" for excluding files
 #define BB_FEATURE_TAR_EXCLUDE
 //
+// Enable support for s///p pattern matching
+#define BB_FEATURE_SED_PATTERN_SPACE
+//
 //// Enable reverse sort
 #define BB_FEATURE_SORT_REVERSE
 //
diff --git a/editors/sed.c b/editors/sed.c
index 60b1e8d2e..f3c3262e4 100644
--- a/editors/sed.c
+++ b/editors/sed.c
@@ -63,6 +63,11 @@ extern char *optarg; /* ditto */
 /* options */
 static int be_quiet = 0;
 
+static const int SUB_G = 1 << 0;
+#ifdef BB_FEATURE_SED_PATTERN_SPACE
+static const int SUB_P = 1 << 1;
+#endif
+
 struct sed_cmd {
 
         /* address storage */
@@ -80,7 +85,11 @@ struct sed_cmd {
         unsigned int num_backrefs:4; /* how many back references (\1..\9) */
                         /* Note:  GNU/POSIX sed does not save more than nine backrefs, so
                          * we only use 4 bits to hold the number */
-        unsigned int sub_g:1; /* sed -e 's/foo/bar/g' (global) */
+#ifndef BB_FEATURE_SED_PATTERN_SPACE
+        unsigned int sub_flags:1; /* sed -e 's/foo/bar/g' (global) */
+#else
+        unsigned int sub_flags:2; /* sed -e 's/foo/bar/gp' (global/pattern) */
+#endif
 
         /* edit command (a,i,c) speicific field */
         char *editline;
@@ -244,8 +253,8 @@ static int parse_subst_cmd(struct sed_cmd *sed_cmd, const char *substr)
 
         /*
          * the string that gets passed to this function should look like this:
-         *    s/match/replace/gI
-         *    ||     |        ||
+         *    s/match/replace/gIp
+         *    ||     |        |||
          *    mandatory       optional
          *
          *    (all three of the '/' slashes are mandatory)
@@ -285,11 +294,16 @@ static int parse_subst_cmd(struct sed_cmd *sed_cmd, const char *substr)
         while (substr[++idx]) {
                 switch (substr[idx]) {
                         case 'g':
-                                sed_cmd->sub_g = 1;
+                                sed_cmd->sub_flags = SUB_G;
                                 break;
                         case 'I':
                                 cflags |= REG_ICASE;
                                 break;
+#ifdef BB_FEATURE_SED_PATTERN_SPACE
+                        case 'p':
+                                sed_cmd->sub_flags = SUB_P;
+                                break;
+#endif
                         default:
                                 /* any whitespace or semicolon trailing after a s/// is ok */
                                 if (strchr("; \t\v\n\r", substr[idx]))
@@ -535,10 +549,17 @@ static int do_subst_command(const struct sed_cmd *sed_cmd, const char *line)
                         /* if we can match the search string... */
                         if (regexec(sed_cmd->sub_match, ptr, sed_cmd->num_backrefs+1, regmatch, 0) == 0) {
                                 /* print everything before the match, */
-                                for (i = 0; i < regmatch[0].rm_so; i++)
+                                for (i = 0; i < regmatch[0].rm_so; i++) {
+#ifdef BB_FEATURE_SED_PATTERN_SPACE
+                                        if(!be_quiet || (sed_cmd->sub_flags & SUB_P))
+#endif
                                         fputc(ptr[i], stdout);
+                                }
 
                                 /* then print the substitution in its place */
+#ifdef BB_FEATURE_SED_PATTERN_SPACE
+                                if(!be_quiet || (sed_cmd->sub_flags & SUB_P))
+#endif
                                 print_subst_w_backrefs(ptr, sed_cmd->replace, regmatch);
 
                                 /* then advance past the match */
@@ -548,7 +569,7 @@ static int do_subst_command(const struct sed_cmd *sed_cmd, const char *line)
                                 altered++;
 
                                 /* if we're not doing this globally... */
-                                if (!sed_cmd->sub_g)
+                                if (!sed_cmd->sub_flags & SUB_G)
                                         break;
                         }
                         /* if we COULD NOT match the search string (meaning we've gone past
@@ -558,7 +579,11 @@ static int do_subst_command(const struct sed_cmd *sed_cmd, const char *line)
                 }
 
                 /* is there anything left to print? */
+#ifdef BB_FEATURE_SED_PATTERN_SPACE
+                if (*ptr && (!be_quiet || sed_cmds->sub_flags & SUB_P))
+#else
                 if (*ptr) 
+#endif
                         fputs(ptr, stdout);
 
                 /* cleanup */
@@ -656,9 +681,14 @@ static void process_file(FILE *file)
 
                 }
 
-                /* we will print the line unless we were told to be quiet or if the
-                 * line was altered (via a 'd'elete or 's'ubstitution) */
-                if (!be_quiet && !line_altered)
+                /* we will print the line unless we were told to be quiet or if
+                 * the line was altered (via a 'd'elete or 's'ubstitution) */
+#ifndef BB_FEATURE_SED_PATTERN_SPACE
+                if (!be_quiet &&!line_altered)
+#else
+                /*  we where specificly requested to print the output */
+                if ((!be_quiet || (sed_cmds[i].sub_flags & SUB_P)) && !line_altered)
+#endif
                         fputs(line, stdout);
 
                 free(line);
diff --git a/sed.c b/sed.c
index 60b1e8d2e..f3c3262e4 100644
--- a/sed.c
+++ b/sed.c
@@ -63,6 +63,11 @@ extern char *optarg; /* ditto */
 /* options */
 static int be_quiet = 0;
 
+static const int SUB_G = 1 << 0;
+#ifdef BB_FEATURE_SED_PATTERN_SPACE
+static const int SUB_P = 1 << 1;
+#endif
+
 struct sed_cmd {
 
         /* address storage */
@@ -80,7 +85,11 @@ struct sed_cmd {
         unsigned int num_backrefs:4; /* how many back references (\1..\9) */
                         /* Note:  GNU/POSIX sed does not save more than nine backrefs, so
                          * we only use 4 bits to hold the number */
-        unsigned int sub_g:1; /* sed -e 's/foo/bar/g' (global) */
+#ifndef BB_FEATURE_SED_PATTERN_SPACE
+        unsigned int sub_flags:1; /* sed -e 's/foo/bar/g' (global) */
+#else
+        unsigned int sub_flags:2; /* sed -e 's/foo/bar/gp' (global/pattern) */
+#endif
 
         /* edit command (a,i,c) speicific field */
         char *editline;
@@ -244,8 +253,8 @@ static int parse_subst_cmd(struct sed_cmd *sed_cmd, const char *substr)
 
         /*
          * the string that gets passed to this function should look like this:
-         *    s/match/replace/gI
-         *    ||     |        ||
+         *    s/match/replace/gIp
+         *    ||     |        |||
          *    mandatory       optional
          *
          *    (all three of the '/' slashes are mandatory)
@@ -285,11 +294,16 @@ static int parse_subst_cmd(struct sed_cmd *sed_cmd, const char *substr)
         while (substr[++idx]) {
                 switch (substr[idx]) {
                         case 'g':
-                                sed_cmd->sub_g = 1;
+                                sed_cmd->sub_flags = SUB_G;
                                 break;
                         case 'I':
                                 cflags |= REG_ICASE;
                                 break;
+#ifdef BB_FEATURE_SED_PATTERN_SPACE
+                        case 'p':
+                                sed_cmd->sub_flags = SUB_P;
+                                break;
+#endif
                         default:
                                 /* any whitespace or semicolon trailing after a s/// is ok */
                                 if (strchr("; \t\v\n\r", substr[idx]))
@@ -535,10 +549,17 @@ static int do_subst_command(const struct sed_cmd *sed_cmd, const char *line)
                         /* if we can match the search string... */
                         if (regexec(sed_cmd->sub_match, ptr, sed_cmd->num_backrefs+1, regmatch, 0) == 0) {
                                 /* print everything before the match, */
-                                for (i = 0; i < regmatch[0].rm_so; i++)
+                                for (i = 0; i < regmatch[0].rm_so; i++) {
+#ifdef BB_FEATURE_SED_PATTERN_SPACE
+                                        if(!be_quiet || (sed_cmd->sub_flags & SUB_P))
+#endif
                                         fputc(ptr[i], stdout);
+                                }
 
                                 /* then print the substitution in its place */
+#ifdef BB_FEATURE_SED_PATTERN_SPACE
+                                if(!be_quiet || (sed_cmd->sub_flags & SUB_P))
+#endif
                                 print_subst_w_backrefs(ptr, sed_cmd->replace, regmatch);
 
                                 /* then advance past the match */
@@ -548,7 +569,7 @@ static int do_subst_command(const struct sed_cmd *sed_cmd, const char *line)
                                 altered++;
 
                                 /* if we're not doing this globally... */
-                                if (!sed_cmd->sub_g)
+                                if (!sed_cmd->sub_flags & SUB_G)
                                         break;
                         }
                         /* if we COULD NOT match the search string (meaning we've gone past
@@ -558,7 +579,11 @@ static int do_subst_command(const struct sed_cmd *sed_cmd, const char *line)
                 }
 
                 /* is there anything left to print? */
+#ifdef BB_FEATURE_SED_PATTERN_SPACE
+                if (*ptr && (!be_quiet || sed_cmds->sub_flags & SUB_P))
+#else
                 if (*ptr) 
+#endif
                         fputs(ptr, stdout);
 
                 /* cleanup */
@@ -656,9 +681,14 @@ static void process_file(FILE *file)
 
                 }
 
-                /* we will print the line unless we were told to be quiet or if the
-                 * line was altered (via a 'd'elete or 's'ubstitution) */
-                if (!be_quiet && !line_altered)
+                /* we will print the line unless we were told to be quiet or if
+                 * the line was altered (via a 'd'elete or 's'ubstitution) */
+#ifndef BB_FEATURE_SED_PATTERN_SPACE
+                if (!be_quiet &&!line_altered)
+#else
+                /*  we where specificly requested to print the output */
+                if ((!be_quiet || (sed_cmds[i].sub_flags & SUB_P)) && !line_altered)
+#endif
                         fputs(line, stdout);
 
                 free(line);