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authorEric Andersen2001-07-25 07:22:55 +0000
committerEric Andersen2001-07-25 07:22:55 +0000
commit655584b07a4b7a1d792c37f7edf1f3467ab803e7 (patch)
treecd4e81726596669f4160754371e954024757713c /dos2unix.c
parent6c7ac21f3a44ccf4a75ce413404726b327691724 (diff)
downloadbusybox-655584b07a4b7a1d792c37f7edf1f3467ab803e7.zip
busybox-655584b07a4b7a1d792c37f7edf1f3467ab803e7.tar.gz
This fixes dos2unix and unix2dos so they behave as expected. dos2unix
was broken in the 0.52 release, and unix2dos was pretty lame... -Erik
Diffstat (limited to 'dos2unix.c')
-rw-r--r--dos2unix.c76
1 files changed, 57 insertions, 19 deletions
diff --git a/dos2unix.c b/dos2unix.c
index e97c3ba..68aee13 100644
--- a/dos2unix.c
+++ b/dos2unix.c
@@ -29,21 +29,51 @@
#include <string.h>
#include <getopt.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/time.h>
#include "busybox.h"
+static const char letters[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
+
// if fn is NULL then input is stdin and output is stdout
-static int convert(char *fn, int ConvType) {
- int c;
- char *tempFn = NULL;
+static int convert(char *fn, int ConvType)
+{
+ int c, fd;
+ struct timeval tv;
+ char tempFn[BUFSIZ];
+ static uint64_t value=0;
FILE *in = stdin, *out = stdout;
if (fn != NULL) {
- if ((in = wfopen(fn, "r")) == NULL) {
+ if ((in = wfopen(fn, "rw")) == NULL) {
return -1;
}
- if ((out = tmpfile()) == NULL) {
- perror_msg(NULL);
- return -2;
+ strcpy(tempFn, fn);
+ c = strlen(tempFn);
+ tempFn[c] = '.';
+ while(1) {
+ if (c >=BUFSIZ)
+ error_msg_and_die("unique name not found");
+ /* Get some semi random stuff to try and make a
+ * random filename based (and in the same dir as)
+ * the input file... */
+ gettimeofday (&tv, NULL);
+ value += ((uint64_t) tv.tv_usec << 16) ^ tv.tv_sec ^ getpid ();
+ tempFn[++c] = letters[value % 62];
+ tempFn[c+1] = '\0';
+ value /= 62;
+
+ if ((fd = open(tempFn, O_RDWR | O_CREAT | O_EXCL, 0600)) < 0 ) {
+ continue;
+ }
+ out = fdopen(fd, "w+");
+ if (!out) {
+ close(fd);
+ remove(tempFn);
+ continue;
+ }
+ break;
}
}
@@ -51,6 +81,7 @@ static int convert(char *fn, int ConvType) {
if (c == '\r') {
if ((ConvType == CT_UNIX2DOS) && (fn != NULL)) {
// file is alredy in DOS format so it is not necessery to touch it
+ remove(tempFn);
if (fclose(in) < 0 || fclose(out) < 0) {
perror_msg(NULL);
return -2;
@@ -64,6 +95,7 @@ static int convert(char *fn, int ConvType) {
if (c == '\n') {
if ((ConvType == CT_DOS2UNIX) && (fn != NULL)) {
// file is alredy in UNIX format so it is not necessery to touch it
+ remove(tempFn);
if ((fclose(in) < 0) || (fclose(out) < 0)) {
perror_msg(NULL);
return -2;
@@ -95,29 +127,35 @@ static int convert(char *fn, int ConvType) {
}
if (fn != NULL) {
- if (fclose(in) < 0 || fclose(out) < 0 ||
- (in = fopen(tempFn, "r")) == NULL || (out = fopen(fn, "w")) == NULL) {
- perror_msg(NULL);
- return -2;
+ if (fclose(in) < 0 || fclose(out) < 0) {
+ perror_msg(NULL);
+ remove(tempFn);
+ return -2;
}
- while ((c = fgetc(in)) != EOF) {
- fputc(c, out);
- }
-
- if ((fclose(in) < 0) || (fclose(out) < 0)) {
- perror_msg(NULL);
- return -2;
+ /* Assume they are both on the same filesystem */
+ if (rename(tempFn, fn) < 0) {
+ perror_msg("unable to rename '%s' as '%s'", tempFn, fn);
+ return -1;
}
}
return 0;
}
-int dos2unix_main(int argc, char *argv[]) {
+int dos2unix_main(int argc, char *argv[])
+{
int ConvType = CT_AUTO;
int o;
+ //See if we are supposed to be doing dos2unix or unix2dos
+ if (argv[0][0]=='d') {
+ ConvType = CT_DOS2UNIX;
+ }
+ if (argv[0][0]=='u') {
+ ConvType = CT_UNIX2DOS;
+ }
+
// process parameters
while ((o = getopt(argc, argv, "du")) != EOF) {
switch (o) {