From 1bbc19928684e5685e344f5f5380a808852443b9 Mon Sep 17 00:00:00 2001 From: randomuser Date: Tue, 17 May 2022 21:53:15 -0500 Subject: [PATCH] add externalpipe patch --- st.c | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++- st.h | 1 + 2 files changed, 61 insertions(+), 1 deletion(-) diff --git a/st.c b/st.c index 91e7077..210cd03 100644 --- a/st.c +++ b/st.c @@ -725,8 +725,14 @@ sigchld(int a) if ((p = waitpid(pid, &stat, WNOHANG)) < 0) die("waiting for pid %hd failed: %s\n", pid, strerror(errno)); - if (pid != p) + if (pid != p) { + if (p == 0 && wait(&stat) < 0) + die("wait: %s\n", strerror(errno)); + + /* reinstall sigchld handler */ + signal(SIGCHLD, sigchld); return; + } if (WIFEXITED(stat) && WEXITSTATUS(stat)) die("child exited with status %d\n", WEXITSTATUS(stat)); @@ -2043,6 +2049,59 @@ strparse(void) } } +void +externalpipe(const Arg *arg) +{ + int to[2]; + char buf[UTF_SIZ]; + void (*oldsigpipe)(int); + Glyph *bp, *end; + int lastpos, n, newline; + + if (pipe(to) == -1) + return; + + switch (fork()) { + case -1: + close(to[0]); + close(to[1]); + return; + case 0: + dup2(to[0], STDIN_FILENO); + close(to[0]); + close(to[1]); + execvp(((char **)arg->v)[0], (char **)arg->v); + fprintf(stderr, "st: execvp %s\n", ((char **)arg->v)[0]); + perror("failed"); + exit(0); + } + + close(to[0]); + /* ignore sigpipe for now, in case child exists early */ + oldsigpipe = signal(SIGPIPE, SIG_IGN); + newline = 0; + for (n = 0; n < term.row; n++) { + bp = term.line[n]; + lastpos = MIN(tlinelen(n) + 1, term.col) - 1; + if (lastpos < 0) + break; + end = &bp[lastpos + 1]; + for (; bp < end; ++bp) + if (xwrite(to[1], buf, utf8encode(bp->u, buf)) < 0) + break; + if ((newline = term.line[n][lastpos].mode & ATTR_WRAP)) + continue; + if (xwrite(to[1], "\n", 1) < 0) + break; + newline = 0; + } + if (newline) + (void)xwrite(to[1], "\n", 1); + close(to[1]); + /* restore */ + signal(SIGPIPE, oldsigpipe); +} + void strdump(void) { diff --git a/st.h b/st.h index 818a6f8..ee3bee2 100644 --- a/st.h +++ b/st.h @@ -81,6 +81,7 @@ void die(const char *, ...); void redraw(void); void draw(void); +void externalpipe(const Arg *); void kscrolldown(const Arg *); void kscrollup(const Arg *); void printscreen(const Arg *);