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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
char **redir_chop(const char *line)
{
if (!line)
return NULL;
const char *redir_delim = "><";
char *pipe_redir = strpbrk(line, redir_delim);
if (pipe_redir == NULL)
return NULL;
size_t redir_delta = pipe_redir - line;
char *former = (char *) malloc(sizeof(char) * 100);
char *latter = (char *) malloc(sizeof(char) * 100);
strncpy(former, line, redir_delta);
former[redir_delta] ='\0';
/* delete spaces at the end of former string */
int i = strlen(former) - 1;
while (former[i] == ' ')
former[i--] = '\0';
/* skip spaces in latter string and then copy over */
int j = redir_delta;
while (line[++j] == ' ')
;
strncpy(latter, line+j, (line + strlen(line)) - pipe_redir);
char **ret = (char **) malloc(sizeof(char *) * 2);
ret[0] = (char *) former;
ret[1] = (char *) latter;
return ret;
}
int main(int argc, char *argv[])
{
const char *line = "ls -1 -al > filename.txt";
#if 0
const char *redir_delim = "><";
char *pipe_redir = strpbrk(line, redir_delim);
size_t redir_delta = pipe_redir - line;
char *former = (char *) malloc(sizeof(char) * 100);
char *latter = (char *) malloc(sizeof(char) * 100);
strncpy(former, line, redir_delta);
former[redir_delta] ='\0';
/* delete spaces at the end of former string */
int i = strlen(former) - 1;
while (former[i] == ' ')
former[i--] = '\0';
/* skip spaces in latter string and then copy over */
int j = redir_delta;
while (line[++j] == ' ')
;
strncpy(latter, line+j, (line + strlen(line)) - pipe_redir);
printf("former string: \"%s\"\n", former);
printf("latter string: \"%s\"\n", latter);
free(former);
free(latter);
#endif
char **chopped = redir_chop(line);
printf("former string: \"%s\"\n", chopped[0]);
printf("latter string: \"%s\"\n", chopped[1]);
return 0;
}
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