Do not eat ESC character if control string is not properly terminated.

[st.git] / st.c

diff --git a/st.c b/st.c
index 7dd5e04..d2261e2 100644 (file)
--- a/st.c
+++ b/st.c
@@ -149,7 +149,7 @@ enum charset {
 enum escape_state {
        ESC_START      = 1,
        ESC_CSI        = 2,
 enum escape_state {
        ESC_START      = 1,
        ESC_CSI        = 2,

-       ESC_STR        = 4,  /* DSC, OSC, PM, APC */
+       ESC_STR        = 4,  /* DCS, OSC, PM, APC */

        ESC_ALTCHARSET = 8,
        ESC_STR_END    = 16, /* a final string was encountered */
        ESC_TEST       = 32, /* Enter in test mode */
        ESC_ALTCHARSET = 8,
        ESC_STR_END    = 16, /* a final string was encountered */
        ESC_TEST       = 32, /* Enter in test mode */


@@ -452,7 +452,7 @@ static char utf8encodebyte(long, size_t);
 static size_t utf8len(char *);
 static size_t utf8validate(long *, size_t);
 
 static size_t utf8len(char *);
 static size_t utf8validate(long *, size_t);
 

-static ssize_t xwrite(int, char *, size_t);
+static ssize_t xwrite(int, const char *, size_t);

 static void *xmalloc(size_t);
 static void *xrealloc(void *, size_t);
 static char *xstrdup(char *);
 static void *xmalloc(size_t);
 static void *xrealloc(void *, size_t);
 static char *xstrdup(char *);


@@ -518,7 +518,7 @@ static Fontcache frc[16];
 static int frclen = 0;
 
 ssize_t
 static int frclen = 0;
 
 ssize_t

-xwrite(int fd, char *s, size_t len) {
+xwrite(int fd, const char *s, size_t len) {

        size_t aux = len;
 
        while(len > 0) {
        size_t aux = len;
 
        while(len > 0) {


@@ -1270,7 +1270,7 @@ ttyread(void) {
 
 void
 ttywrite(const char *s, size_t n) {
 
 void
 ttywrite(const char *s, size_t n) {

-       if(write(cmdfd, s, n) == -1)
+       if(xwrite(cmdfd, s, n) == -1)

                die("write error on tty: %s\n", strerror(errno));
 }
 
                die("write error on tty: %s\n", strerror(errno));
 }
 


@@ -2169,7 +2169,7 @@ strhandle(void) {
        case 'k': /* old title set compatibility */
                xsettitle(strescseq.args[0]);
                return;
        case 'k': /* old title set compatibility */
                xsettitle(strescseq.args[0]);
                return;

-       case 'P': /* DSC -- Device Control String */
+       case 'P': /* DCS -- Device Control String */

        case '_': /* APC -- Application Program Command */
        case '^': /* PM -- Privacy Message */
                return;
        case '_': /* APC -- Application Program Command */
        case '^': /* PM -- Privacy Message */
                return;


@@ -2298,7 +2298,7 @@ techo(char *buf, int len) {
        for(; len > 0; buf++, len--) {
                char c = *buf;
 
        for(; len > 0; buf++, len--) {
                char c = *buf;
 

-               if(c < 0x20 || c == 0177) { /* control code */
+               if(BETWEEN(c, 0x00, 0x1f) || c == 0x7f) { /* control code */

                        if(c != '\n' && c != '\r' && c != '\t') {
                                c ^= '\x40';
                                tputc("^", 1);
                        if(c != '\n' && c != '\r' && c != '\t') {
                                c ^= '\x40';
                                tputc("^", 1);


@@ -2452,10 +2452,6 @@ tputc(char *c, int len) {
                                csiparse();
                                csihandle();
                        }
                                csiparse();
                                csihandle();
                        }

-               } else if(term.esc & ESC_STR_END) {
-                       term.esc = 0;
-                       if(ascii == '\\')
-                               strhandle();

                } else if(term.esc & ESC_ALTCHARSET) {
                        tdeftran(ascii);
                        tselcs();
                } else if(term.esc & ESC_ALTCHARSET) {
                        tdeftran(ascii);
                        tselcs();


@@ -2545,7 +2541,9 @@ tputc(char *c, int len) {
                                tcursor(CURSOR_LOAD);
                                term.esc = 0;
                                break;
                                tcursor(CURSOR_LOAD);
                                term.esc = 0;
                                break;

-                       case '\\': /* ST -- Stop */
+                       case '\\': /* ST -- String Terminator */
+                               if(term.esc & ESC_STR_END)
+                                       strhandle();

                                term.esc = 0;
                                break;
                        default:
                                term.esc = 0;
                                break;
                        default: