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#include <err.h>
#include <stdio.h>
#include <unistd.h>
int
main(int argc, char *argv[])
{
char ans[10], file[30];
FILE *fp;
int i;
if (argc-1 == 0) {
fprintf(stderr, "usage: %s file ...\n", argv[0]);
return 1;
}
sprintf(file, "/var/tmp/re.%d", getppid());
if (!access(file, F_OK)) {
do
fprintf(stderr, "%s already exists; overwrite? ", file);
while (!gets(ans) || !*ans);
if (ans[0] != 'y') return 1;
}
if (!(fp = fopen(file, "w")))
err(1, "fopen");
for (i = 1; i < argc; i++) {
fprintf(fp, "%s\n", argv[i]);
printf("%s\n", argv[i]);
}
fclose(fp);
}
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