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The function {{fdopen()}} \[[Open Group 04|AA. C References#Open Group 05]\] can be used in conjunction to {{open()}} to to determine if an existing file has been opened, or a new file has been created and then associate a stream with a file descriptor. |
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FILE *fp;
int fd;
fd = open(file_name, O_CREAT | O_EXCL | O_WRONLY, new_file_mode);
if (fd == -1) {
/* Handle Error */
}
fp = fdopen(fd,"w");
if (fp == NULL) {
/* Handle Error */
}
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