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-rw-r--r--usr.bin/mg/def.h4
-rw-r--r--usr.bin/mg/region.c130
2 files changed, 77 insertions, 57 deletions
diff --git a/usr.bin/mg/def.h b/usr.bin/mg/def.h
index a99421c765c..9a6e82ce7d9 100644
--- a/usr.bin/mg/def.h
+++ b/usr.bin/mg/def.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: def.h,v 1.132 2012/12/04 10:54:20 florian Exp $ */
+/* $OpenBSD: def.h,v 1.133 2012/12/27 18:49:59 florian Exp $ */
/* This file is in the public domain. */
@@ -591,6 +591,8 @@ int region_get_data(struct region *, char *, int);
void region_put_data(const char *, int);
int markbuffer(int, int);
int piperegion(int, int);
+int pipeio(const char * const, char * const[], char * const, int,
+ struct buffer *);
/* search.c X */
int forwsearch(int, int);
diff --git a/usr.bin/mg/region.c b/usr.bin/mg/region.c
index 7a21182d7d1..80b65a5dcbd 100644
--- a/usr.bin/mg/region.c
+++ b/usr.bin/mg/region.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: region.c,v 1.31 2012/10/26 20:46:12 florian Exp $ */
+/* $OpenBSD: region.c,v 1.32 2012/12/27 18:49:59 florian Exp $ */
/* This file is in the public domain. */
@@ -24,8 +24,7 @@
static char leftover[BUFSIZ];
static int getregion(struct region *);
-static int iomux(int);
-static int pipeio(const char *);
+static int iomux(int, char * const, int, struct buffer *);
static int preadin(int, struct buffer *);
static void pwriteout(int, char **, int *);
static int setsize(struct region *, RSIZE);
@@ -406,7 +405,11 @@ markbuffer(int f, int n)
int
piperegion(int f, int n)
{
- char *cmd, cmdbuf[NFILEN];
+ struct region region;
+ struct buffer *bp;
+ int len, ret;
+ char *cmd, cmdbuf[NFILEN], *shellp, *text;
+ char *argv[] = {"sh", "-c", (char *) NULL, (char *) NULL};
/* C-u M-| is not supported yet */
if (n > 1)
@@ -416,27 +419,62 @@ piperegion(int f, int n)
ewprintf("The mark is not set now, so there is no region");
return (FALSE);
}
+
if ((cmd = eread("Shell command on region: ", cmdbuf, sizeof(cmdbuf),
EFNEW | EFCR)) == NULL || (cmd[0] == '\0'))
return (ABORT);
- return (pipeio(cmdbuf));
+ argv[2] = cmd;
+
+ if (getregion(&region) != TRUE)
+ return (FALSE);
+
+ len = region.r_size;
+
+ if ((text = malloc(len + 1)) == NULL) {
+ ewprintf("Cannot allocate memory.");
+ return (FALSE);
+ }
+
+ bp = bfind("*Shell Command Output*", TRUE);
+ bp->b_flag |= BFREADONLY;
+ if (bclear(bp) != TRUE) {
+ free(text);
+ return (FALSE);
+ }
+
+ region_get_data(&region, text, len);
+ shellp = getenv("SHELL");
+
+ ret = pipeio(shellp, argv, text, len, bp);
+
+ if (ret == TRUE) {
+ eerase();
+ if (lforw(bp->b_headp) == bp->b_headp)
+ addline(bp, "(Shell command succeeded with no output)");
+ }
+
+ free(text);
+ return (ret);
}
/*
- * Create a socketpair, fork and execl cmd passed. STDIN, STDOUT
- * and STDERR of child process are redirected to socket.
+ * Create a socketpair, fork and execv path with argv.
+ * STDIN, STDOUT and STDERR of child process are redirected to socket.
+ * Parent writes len chars from text to socket.
*/
int
-pipeio(const char* const cmd)
+pipeio(const char* const path, char* const argv[], char* const text, int len,
+ struct buffer *outbp)
{
int s[2];
- char *shellp;
+ char *err;
if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, s) == -1) {
ewprintf("socketpair error");
return (FALSE);
}
+
switch(fork()) {
case -1:
ewprintf("Can't fork");
@@ -450,78 +488,63 @@ pipeio(const char* const cmd)
_exit(1);
if (dup2(s[1], STDERR_FILENO) == -1)
_exit(1);
- if ((shellp = getenv("SHELL")) == NULL)
+ if (path == NULL)
_exit(1);
- execl(shellp, "sh", "-c", cmd, (char *)NULL);
+
+ execv(path, argv);
+ err = strerror(errno);
+ write(s[1], err, strlen(err));
_exit(1);
default:
/* Parent process */
close(s[1]);
- return iomux(s[0]);
+ return (iomux(s[0], text, len, outbp));
}
return (FALSE);
}
/*
- * Multiplex read, write on socket fd passed. First get the region,
- * find/create *Shell Command Output* buffer and clear it's contents.
+ * Multiplex read, write on socket fd passed. Put output in outbp
* Poll on the fd for both read and write readiness.
*/
int
-iomux(int fd)
+iomux(int fd, char* const text, int len, struct buffer *outbp)
{
- struct region region;
- struct buffer *bp;
struct pollfd pfd[1];
int nfds;
- char *text, *textcopy;
-
- if (getregion(&region) != TRUE) {
- close(fd);
- return (FALSE);
- }
-
- if ((text = malloc(region.r_size + 1)) == NULL) {
- close(fd);
- return (ABORT);
- }
+ char *textcopy;
- region_get_data(&region, text, region.r_size);
textcopy = text;
fcntl(fd, F_SETFL, O_NONBLOCK);
-
- /* There is nothing to write if r_size is zero
+ pfd[0].fd = fd;
+
+ /* There is nothing to write if len is zero
* but the cmd's output should be read so shutdown
- * the socket for writing only.
+ * the socket for writing only and don't wait for POLLOUT
*/
- if (region.r_size == 0)
+ if (len == 0) {
shutdown(fd, SHUT_WR);
-
- bp = bfind("*Shell Command Output*", TRUE);
- bp->b_flag |= BFREADONLY;
- if (bclear(bp) != TRUE) {
- close(fd);
- free(text);
- return (FALSE);
- }
+ pfd[0].events = POLLIN;
+ } else
+ pfd[0].events = POLLIN | POLLOUT;
- pfd[0].fd = fd;
- pfd[0].events = POLLIN | POLLOUT;
while ((nfds = poll(pfd, 1, TIMEOUT)) != -1 ||
(pfd[0].revents & (POLLERR | POLLHUP | POLLNVAL))) {
- if (pfd[0].revents & POLLOUT && region.r_size > 0)
- pwriteout(fd, &textcopy, &region.r_size);
+ if (pfd[0].revents & POLLOUT && len > 0)
+ pwriteout(fd, &textcopy, &len);
else if (pfd[0].revents & POLLIN)
- if (preadin(fd, bp) == FALSE)
+ if (preadin(fd, outbp) == FALSE)
break;
+ if (len == 0 && pfd[0].events & POLLOUT)
+ pfd[0].events = POLLIN;
}
close(fd);
- free(text);
+
/* In case if last line doesn't have a '\n' add the leftover
* characters to buffer.
*/
if (leftover[0] != '\0') {
- addline(bp, leftover);
+ addline(outbp, leftover);
leftover[0] = '\0';
}
if (nfds == 0) {
@@ -531,7 +554,7 @@ iomux(int fd)
ewprintf("poll error");
return (FALSE);
}
- return (popbuftop(bp, WNONE));
+ return (popbuftop(outbp, WNONE));
}
/*
@@ -568,16 +591,11 @@ int
preadin(int fd, struct buffer *bp)
{
int len;
- static int nooutput;
char buf[BUFSIZ], *p, *q;
- if ((len = read(fd, buf, BUFSIZ - 1)) == 0) {
- if (nooutput == 0)
- addline(bp, "(Shell command succeeded with no output)");
- nooutput = 0;
+ if ((len = read(fd, buf, BUFSIZ - 1)) == 0)
return (FALSE);
- }
- nooutput = 1;
+
buf[len] = '\0';
p = q = buf;
if (leftover[0] != '\0' && ((q = strchr(p, '\n')) != NULL)) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-16 02:29:21 +0000