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-rw-r--r--busybox.h1
-rw-r--r--include/busybox.h1
-rw-r--r--nc.c57
-rw-r--r--networking/nc.c57
-rw-r--r--utility.c15
5 files changed, 46 insertions, 85 deletions
diff --git a/busybox.h b/busybox.h
index 41421ae56..5ff3975b9 100644
--- a/busybox.h
+++ b/busybox.h
@@ -147,6 +147,7 @@ int makeString(int argc, const char **argv, char *buf, int bufLen);
char *getChunk(int size);
char *chunkstrdup(const char *str);
void freeChunks(void);
+ssize_t safe_read(int fd, void *buf, size_t count);
int full_write(int fd, const char *buf, int len);
int full_read(int fd, char *buf, int len);
int recursive_action(const char *fileName, int recurse, int followLinks, int depthFirst,
diff --git a/include/busybox.h b/include/busybox.h
index 41421ae56..5ff3975b9 100644
--- a/include/busybox.h
+++ b/include/busybox.h
@@ -147,6 +147,7 @@ int makeString(int argc, const char **argv, char *buf, int bufLen);
char *getChunk(int size);
char *chunkstrdup(const char *str);
void freeChunks(void);
+ssize_t safe_read(int fd, void *buf, size_t count);
int full_write(int fd, const char *buf, int len);
int full_read(int fd, char *buf, int len);
int recursive_action(const char *fileName, int recurse, int followLinks, int depthFirst,
diff --git a/nc.c b/nc.c
index 84c1a815e..a2be8ec46 100644
--- a/nc.c
+++ b/nc.c
@@ -38,14 +38,10 @@
#include <sys/time.h>
#include <sys/ioctl.h>
-#define BUFSIZE 100
-
int nc_main(int argc, char **argv)
{
int sfd;
- int result;
- int len;
- char ch[BUFSIZE];
+ char buf[BUFSIZ];
struct sockaddr_in address;
struct hostent *hostinfo;
@@ -54,34 +50,26 @@ int nc_main(int argc, char **argv)
argc--;
argv++;
- if (argc < 2 || **(argv + 1) == '-') {
+ if (argc < 2 || **argv == '-') {
usage(nc_usage);
}
- sfd = socket(AF_INET, SOCK_STREAM, 0);
-
- hostinfo = (struct hostent *) gethostbyname(*argv);
+ if ((sfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
+ perror_msg_and_die("socket");
- if (!hostinfo) {
+ if ((hostinfo = gethostbyname(*argv)) == NULL)
error_msg_and_die("cannot resolve %s\n", *argv);
- }
address.sin_family = AF_INET;
address.sin_addr = *(struct in_addr *) *hostinfo->h_addr_list;
address.sin_port = htons(atoi(*(++argv)));
- len = sizeof(address);
-
- result = connect(sfd, (struct sockaddr *) &address, len);
-
- if (result < 0) {
- perror("nc: connect");
- exit(2);
- }
+ if (connect(sfd, (struct sockaddr *) &address, sizeof(address)) < 0)
+ perror_msg_and_die("connect");
FD_ZERO(&readfds);
FD_SET(sfd, &readfds);
- FD_SET(fileno(stdin), &readfds);
+ FD_SET(STDIN_FILENO, &readfds);
while (1) {
int fd;
@@ -90,41 +78,26 @@ int nc_main(int argc, char **argv)
testfds = readfds;
- result =
- select(FD_SETSIZE, &testfds, (fd_set *) NULL, (fd_set *) NULL,
- (struct timeval *) 0);
-
- if (result < 1) {
- perror("nc: select");
- exit(3);
- }
+ if (select(FD_SETSIZE, &testfds, NULL, NULL, NULL) < 0)
+ perror_msg_and_die("select");
for (fd = 0; fd < FD_SETSIZE; fd++) {
if (FD_ISSET(fd, &testfds)) {
- int trn = 0;
- int rn;
-
- ioctl(fd, FIONREAD, &nread);
+ if ((nread = safe_read(fd, buf, sizeof(buf))) < 0)
+ perror_msg_and_die("read");
if (fd == sfd) {
if (nread == 0)
exit(0);
- ofd = fileno(stdout);
+ ofd = STDOUT_FILENO;
} else {
if (nread == 0)
shutdown(sfd, 1);
ofd = sfd;
}
-
-
- do {
- rn = (BUFSIZE < nread - trn) ? BUFSIZE : nread - trn;
- trn += rn;
- read(fd, ch, rn);
- write(ofd, ch, rn);
- }
- while (trn < nread);
+ if (full_write(ofd, buf, nread) < 0)
+ perror_msg_and_die("write");
}
}
}
diff --git a/networking/nc.c b/networking/nc.c
index 84c1a815e..a2be8ec46 100644
--- a/networking/nc.c
+++ b/networking/nc.c
@@ -38,14 +38,10 @@
#include <sys/time.h>
#include <sys/ioctl.h>
-#define BUFSIZE 100
-
int nc_main(int argc, char **argv)
{
int sfd;
- int result;
- int len;
- char ch[BUFSIZE];
+ char buf[BUFSIZ];
struct sockaddr_in address;
struct hostent *hostinfo;
@@ -54,34 +50,26 @@ int nc_main(int argc, char **argv)
argc--;
argv++;
- if (argc < 2 || **(argv + 1) == '-') {
+ if (argc < 2 || **argv == '-') {
usage(nc_usage);
}
- sfd = socket(AF_INET, SOCK_STREAM, 0);
-
- hostinfo = (struct hostent *) gethostbyname(*argv);
+ if ((sfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
+ perror_msg_and_die("socket");
- if (!hostinfo) {
+ if ((hostinfo = gethostbyname(*argv)) == NULL)
error_msg_and_die("cannot resolve %s\n", *argv);
- }
address.sin_family = AF_INET;
address.sin_addr = *(struct in_addr *) *hostinfo->h_addr_list;
address.sin_port = htons(atoi(*(++argv)));
- len = sizeof(address);
-
- result = connect(sfd, (struct sockaddr *) &address, len);
-
- if (result < 0) {
- perror("nc: connect");
- exit(2);
- }
+ if (connect(sfd, (struct sockaddr *) &address, sizeof(address)) < 0)
+ perror_msg_and_die("connect");
FD_ZERO(&readfds);
FD_SET(sfd, &readfds);
- FD_SET(fileno(stdin), &readfds);
+ FD_SET(STDIN_FILENO, &readfds);
while (1) {
int fd;
@@ -90,41 +78,26 @@ int nc_main(int argc, char **argv)
testfds = readfds;
- result =
- select(FD_SETSIZE, &testfds, (fd_set *) NULL, (fd_set *) NULL,
- (struct timeval *) 0);
-
- if (result < 1) {
- perror("nc: select");
- exit(3);
- }
+ if (select(FD_SETSIZE, &testfds, NULL, NULL, NULL) < 0)
+ perror_msg_and_die("select");
for (fd = 0; fd < FD_SETSIZE; fd++) {
if (FD_ISSET(fd, &testfds)) {
- int trn = 0;
- int rn;
-
- ioctl(fd, FIONREAD, &nread);
+ if ((nread = safe_read(fd, buf, sizeof(buf))) < 0)
+ perror_msg_and_die("read");
if (fd == sfd) {
if (nread == 0)
exit(0);
- ofd = fileno(stdout);
+ ofd = STDOUT_FILENO;
} else {
if (nread == 0)
shutdown(sfd, 1);
ofd = sfd;
}
-
-
- do {
- rn = (BUFSIZE < nread - trn) ? BUFSIZE : nread - trn;
- trn += rn;
- read(fd, ch, rn);
- write(ofd, ch, rn);
- }
- while (trn < nread);
+ if (full_write(ofd, buf, nread) < 0)
+ perror_msg_and_die("write");
}
}
}
diff --git a/utility.c b/utility.c
index 02479d977..4654daec4 100644
--- a/utility.c
+++ b/utility.c
@@ -536,7 +536,7 @@ const char *time_string(time_t timeVal)
}
#endif /* BB_TAR || BB_AR */
-#if defined BB_TAR || defined BB_CP_MV || defined BB_AR || defined BB_DD
+#if defined BB_AR || defined BB_CP_MV || defined BB_DD || defined BB_NC || defined BB_TAR
/*
* Write all of the supplied buffer out to a file.
* This does multiple writes as necessary.
@@ -1791,6 +1791,19 @@ int applet_name_compare(const void *x, const void *y)
return strcmp(applet1->name, applet2->name);
}
+#if defined BB_NC
+ssize_t safe_read(int fd, void *buf, size_t count)
+{
+ ssize_t n;
+
+ do {
+ n = read(fd, buf, count);
+ } while (n < 0 && errno == EINTR);
+
+ return n;
+}
+#endif
+
/* END CODE */
/*
Local Variables:
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-03 14:36:58 +0000