[PATCH] libbb: remove unnecessary argument to nonblock_immune_read

[Ron Yorston]

The loop_on_EINTR argument to nonblock_immune_read is always set to 1.

function                                             old     new   delta
xmalloc_reads                                        200     195      -5
pgetc                                                488     483      -5
argstr                                              1313    1308      -5
nonblock_immune_read                                 123      86     -37
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/4 up/down: 0/-52)             Total: -52 bytes

Signed-off-by: Ron Yorston <rmy at tigress.co.uk>
---
 include/libbb.h     | 2 +-
 libbb/read_printf.c | 8 ++++----
 shell/ash.c         | 6 +++---
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/include/libbb.h b/include/libbb.h
index 0f8363b..21da5f1 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -713,7 +713,7 @@ void* xrealloc_vector_helper(void *vector, unsigned sizeof_and_shift, int idx) F
 
 
 extern ssize_t safe_read(int fd, void *buf, size_t count) FAST_FUNC;
-extern ssize_t nonblock_immune_read(int fd, void *buf, size_t count, int loop_on_EINTR) FAST_FUNC;
+extern ssize_t nonblock_immune_read(int fd, void *buf, size_t count) FAST_FUNC;
 // NB: will return short read on error, not -1,
 // if some data was read before error occurred
 extern ssize_t full_read(int fd, void *buf, size_t count) FAST_FUNC;
diff --git a/libbb/read_printf.c b/libbb/read_printf.c
index 5ed6e36..b6a17cc 100644
--- a/libbb/read_printf.c
+++ b/libbb/read_printf.c
@@ -45,20 +45,20 @@
  * which detects EAGAIN and uses poll() to wait on the fd.
  * Thankfully, poll() doesn't care about O_NONBLOCK flag.
  */
-ssize_t FAST_FUNC nonblock_immune_read(int fd, void *buf, size_t count, int loop_on_EINTR)
+ssize_t FAST_FUNC nonblock_immune_read(int fd, void *buf, size_t count)
 {
 	struct pollfd pfd[1];
 	ssize_t n;
 
 	while (1) {
-		n = loop_on_EINTR ? safe_read(fd, buf, count) : read(fd, buf, count);
+		n = safe_read(fd, buf, count);
 		if (n >= 0 || errno != EAGAIN)
 			return n;
 		/* fd is in O_NONBLOCK mode. Wait using poll and repeat */
 		pfd[0].fd = fd;
 		pfd[0].events = POLLIN;
 		/* note: safe_poll pulls in printf */
-		loop_on_EINTR ? safe_poll(pfd, 1, -1) : poll(pfd, 1, -1);
+		safe_poll(pfd, 1, -1);
 	}
 }
 
@@ -81,7 +81,7 @@ char* FAST_FUNC xmalloc_reads(int fd, size_t *maxsz_p)
 			p = buf + sz;
 			sz += 128;
 		}
-		if (nonblock_immune_read(fd, p, 1, /*loop_on_EINTR:*/ 1) != 1) {
+		if (nonblock_immune_read(fd, p, 1) != 1) {
 			/* EOF/error */
 			if (p == buf) { /* we read nothing */
 				free(buf);
diff --git a/shell/ash.c b/shell/ash.c
index b568013..6718901 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -5923,7 +5923,7 @@ expbackq(union node *cmd, int quoted, int quotes)
  read:
 		if (in.fd < 0)
 			break;
-		i = nonblock_immune_read(in.fd, buf, sizeof(buf), /*loop_on_EINTR:*/ 1);
+		i = nonblock_immune_read(in.fd, buf, sizeof(buf));
 		TRACE(("expbackq: read returns %d\n", i));
 		if (i <= 0)
 			break;
@@ -9677,7 +9677,7 @@ preadfd(void)
 #if ENABLE_FEATURE_EDITING
  retry:
 	if (!iflag || g_parsefile->pf_fd != STDIN_FILENO)
-		nr = nonblock_immune_read(g_parsefile->pf_fd, buf, IBUFSIZ - 1, /*loop_on_EINTR:*/ 1);
+		nr = nonblock_immune_read(g_parsefile->pf_fd, buf, IBUFSIZ - 1);
 	else {
 		int timeout = -1;
 # if ENABLE_ASH_IDLE_TIMEOUT
@@ -9719,7 +9719,7 @@ preadfd(void)
 		}
 	}
 #else
-	nr = nonblock_immune_read(g_parsefile->pf_fd, buf, IBUFSIZ - 1, /*loop_on_EINTR:*/ 1);
+	nr = nonblock_immune_read(g_parsefile->pf_fd, buf, IBUFSIZ - 1);
 #endif
 
 #if 0 /* disabled: nonblock_immune_read() handles this problem */
-- 
2.1.0