[hackers] [dmenu][PATCH] '-dy commandhere' option added, where said command will be ran every time input changes, with the current output as the first argumentand dmenu options will be changed accordingly

[Tiago Teles]

---
 config.def.h |  1 +
 dmenu.c      | 38 +++++++++++++++++++++++++++++++-------
 2 files changed, 32 insertions(+), 7 deletions(-)

diff --git a/config.def.h b/config.def.h
index 1edb647..035b877 100644
--- a/config.def.h
+++ b/config.def.h
@@ -7,6 +7,7 @@ static const char *fonts[] = {
        "monospace:size=10"
 };
 static const char *prompt      = NULL;      /* -p  option; prompt to the left 
of input field */
+static const char *dynamic     = NULL;      /* -dy option; dynamic command to 
run on input change */
 static const char *colors[SchemeLast][2] = {
        /*     fg         bg       */
        [SchemeNorm] = { "#bbbbbb", "#222222" },
diff --git a/dmenu.c b/dmenu.c
index 6b8f51b..6a0eb01 100644
--- a/dmenu.c
+++ b/dmenu.c
@@ -210,9 +210,28 @@ grabkeyboard(void)
        die("cannot grab keyboard");
 }
 
+static void readstdin(FILE* stream);
+
+static void
+refreshoptions(){
+  int dynlen = strlen(dynamic);
+  char cmd[dynlen + strlen(text)];
+  strcpy(cmd, dynamic);
+  cmd[dynlen] = ' ';
+  strcpy(&cmd[dynlen] + 1, text);
+  FILE *stream = popen(cmd, "r");
+  readstdin(stream);
+  pclose(stream);
+  curr = sel = items;
+}
+
 static void
 match(void)
 {
+       if(dynamic && *dynamic){
+               refreshoptions();
+       }
+
        static char **tokv = NULL;
        static int tokn = 0;
 
@@ -234,7 +253,7 @@ match(void)
                for (i = 0; i < tokc; i++)
                        if (!fstrstr(item->text, tokv[i]))
                                break;
-               if (i != tokc) /* not all tokens match */
+               if (i != tokc && !(dynamic && *dynamic)) /* not all tokens 
match */
                        continue;
                /* exact matches go first, then prefixes, then substrings */
                if (!tokc || !fstrncmp(text, item->text, textsize))
@@ -519,14 +538,14 @@ paste(void)
 }
 
 static void
-readstdin(void)
+readstdin(FILE* stream)
 {
        char buf[sizeof text], *p;
        size_t i, imax = 0, size = 0;
        unsigned int tmpmax = 0;
 
        /* read each line from stdin and add it to the item list */
-       for (i = 0; fgets(buf, sizeof buf, stdin); i++) {
+       for (i = 0; fgets(buf, sizeof buf, stream); i++) {
                if (i + 1 >= size / sizeof *items)
                        if (!(items = realloc(items, (size += BUFSIZ))))
                                die("cannot realloc %u bytes:", size);
@@ -544,7 +563,8 @@ readstdin(void)
        if (items)
                items[i].text = NULL;
        inputw = items ? TEXTW(items[imax].text) : 0;
-       lines = MIN(lines, i);
+       if (!dynamic || !*dynamic)
+               lines = MIN(lines, i);
 }
 
 static void
@@ -683,7 +703,7 @@ static void
 usage(void)
 {
        fputs("usage: dmenu [-bfiv] [-l lines] [-p prompt] [-fn font] [-m 
monitor]\n"
-             "             [-nb color] [-nf color] [-sb color] [-sf color] [-w 
windowid]\n", stderr);
+             "             [-nb color] [-nf color] [-sb color] [-sf color] [-w 
windowid]\n" "[-dy command]\n", stderr);
        exit(1);
 }
 
@@ -726,6 +746,8 @@ main(int argc, char *argv[])
                        colors[SchemeSel][ColFg] = argv[++i];
                else if (!strcmp(argv[i], "-w"))   /* embedding window id */
                        embed = argv[++i];
+               else if (!strcmp(argv[i], "-dy"))  /* dynamic command to run */
+                       dynamic = argv[++i];
                else
                        usage();
 
@@ -754,9 +776,11 @@ main(int argc, char *argv[])
 
        if (fast && !isatty(0)) {
                grabkeyboard();
-               readstdin();
+               if(!(dynamic && *dynamic))
+                       readstdin(stdin);
        } else {
-               readstdin();
+               if(!(dynamic && *dynamic))
+                       readstdin(stdin);
                grabkeyboard();
        }
        setup();
-- 
2.26.2