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Add support for pcap output to FIFO

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This commit is contained in:
William Robinet 2021-06-18 17:33:48 +02:00
parent d10bb16f87
commit 4a6fcb5963
1 changed files with 19 additions and 14 deletions
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33
pcap/logpkt.c
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@ -219,25 +219,30 @@ logpkt_pcap_open_fd(int fd) {
pcap_file_hdr_t hdr;
off_t sz;
ssize_t n;
struct stat st;
sz = lseek(fd, 0, SEEK_END);
if (sz == -1)
if(fstat(fd, &st))
return -1;
if (sz > 0) {
if (lseek(fd, 0, SEEK_SET) == -1)
if(!S_ISFIFO(st.st_mode)) {
sz = lseek(fd, 0, SEEK_END);
if (sz == -1)
return -1;
n = read(fd, &hdr, sizeof(pcap_file_hdr_t));
if (n != sizeof(pcap_file_hdr_t))
return -1;
if (hdr.magic_number == PCAP_MAGIC)
return lseek(fd, 0, SEEK_END) == -1 ? -1 : 0;
if (lseek(fd, 0, SEEK_SET) == -1)
return -1;
if (ftruncate(fd, 0) == -1)
return -1;
}
if (sz > 0) {
if (lseek(fd, 0, SEEK_SET) == -1)
return -1;
n = read(fd, &hdr, sizeof(pcap_file_hdr_t));
if (n != sizeof(pcap_file_hdr_t))
return -1;
if (hdr.magic_number == PCAP_MAGIC)
return lseek(fd, 0, SEEK_END) == -1 ? -1 : 0;
if (lseek(fd, 0, SEEK_SET) == -1)
return -1;
if (ftruncate(fd, 0) == -1)
return -1;
}
}
return logpkt_write_global_pcap_hdr(fd);
}