diff options
Diffstat (limited to 'src/server-tty.c')
-rw-r--r-- | src/server-tty.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/src/server-tty.c b/src/server-tty.c new file mode 100644 index 0000000..d3f36b1 --- /dev/null +++ b/src/server-tty.c @@ -0,0 +1,69 @@ +#define _GNU_SOURCE + +#include <assert.h> +#include <stdio.h> +#include <string.h> +#include <errno.h> +#include <stdlib.h> +#include <fcntl.h> +#include <unistd.h> + +#include "server-tty.h" + +static void destruct(struct stream *s) { + assert(s && s->user); + if (unlink((char*) s->user) < 0) + fprintf(stderr, "WARNING: unlink(): %s\n", strerror(errno)); + free(s->user); +} + +struct stream* stream_server_tty(const char *args) { + struct stream *s = NULL; + int fd = -1; + char *n; + + s = malloc(sizeof(struct stream)); + assert(s); + memset(s, 0, sizeof(struct stream)); + + if ((fd = open("/dev/ptmx", O_RDWR|O_NOCTTY)) < 0) { + fprintf(stderr, "open('/dev/ptmx', O_RDWR|O_NOCTTY): %s\n", strerror(errno)); + goto fail; + } + + if (grantpt(fd) < 0) { + fprintf(stderr, "grantpt(): %s\n", strerror(errno)); + goto fail; + } + + if (unlockpt(fd) < 0) { + fprintf(stderr, "grantpt(): %s\n", strerror(errno)); + goto fail; + } + + if (!(n = ptsname(fd)) < 0) { + fprintf(stderr, "ptsname(): %s\n", strerror(errno)); + goto fail; + } + + if (args) { + if (symlink(n, args) < 0) { + fprintf(stderr, "symlink('%s', '%s'): %s\n", n, args, strerror(errno)); + goto fail; + } + } else + fprintf(stderr, "Allocated pseudo tty '%s'.\n", n); + + s->user = strdup(args); + s->destruct = destruct; + s->input_fd = s->output_fd = fd; + return s; + +fail: + free(s); + if (fd >= 0) + close(fd); + + return NULL; + +} |