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simplify HelloWorld code

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This commit is contained in:
Stefan Lankes 2015-01-18 09:16:35 +01:00
parent 6561c9511c
commit 75becf673e
1 changed files with 4 additions and 40 deletions
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44
newlib/examples/hello.c
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@ -29,55 +29,19 @@
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <dirent.h>
/*file descriptor init*/
#define NR_OPEN 10
#define FS_INIT { [0 ... NR_OPEN-1] = {NULL, 0, 0} }
#define TESTSTR "hello in new file '/bin/test.txt'"
#undef errno
extern int errno;
int main(int argc, char** argv)
{
int i, testfile;
char* teststr;
DIR* testdir;
dirent_t* testdirent;
int i;
printf("Hello World!!!\n");
for(i=0; environ[i]; i++)
printf("environ[%d] = %s\n", i, environ[i]);
for(i=0; i<argc; i++)
printf("argv[%d] = %s\n", i, argv[i]);
teststr = malloc(sizeof(char)*100);
if (!teststr)
exit(1);
testfile = open("/bin/test.txt", O_CREAT | O_EXCL, "wr");
if (testfile < 1) {
printf("error: Was not able to open /bin/test.txt\n");
exit(1);
}
write(testfile, TESTSTR, 34);
lseek(testfile, 0, SEEK_SET);
read(testfile, teststr, 100);
close(testfile);
printf("read from new file: %s\n", teststr);
if (strcmp(teststr, TESTSTR))
exit(1);
testdir = opendir("/bin/");
if (testdir < 1) {
printf("error: Was not able to open /bin directory");
exit(1);
}
testdirent = readdir(testdir);
printf("1. Dirent: %s\n", testdirent->d_name);
closedir(testdir);
return errno;
}