diff options
Diffstat (limited to 'std.c')
| -rw-r--r-- | std.c | 40 |
1 files changed, 38 insertions, 2 deletions
@@ -3,6 +3,10 @@ #include <sys/wait.h> #include <ctype.h> #include <err.h> +#include <fcntl.h> +#if !(_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) +#include <pty.h> +#endif #include <signal.h> #include <stdarg.h> #include <stdio.h> @@ -17,7 +21,7 @@ static void buffer(char c); static void cmd(const char *cmdstr, ...); static int getch(); -void getpty(void); +static void getpty(void); static void movea(int x, int y); static void mover(int x, int y); static void parseesc(void); @@ -41,7 +45,7 @@ typedef struct { static int cols = 80, lines = 25; static int cx = 0, cy = 0; static int c; -int ptm, pts; +static int ptm, pts; static _Bool bold, digit, qmark; static pid_t pid; static RingBuffer buf; @@ -208,6 +212,38 @@ scroll(int l) { } void +getpty(void) { + char *ptsdev; + +#if defined(_GNU_SOURCE) + ptm = getpt(); +#elif _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600 + ptm = posix_openpt(O_RDWR); +#else + ptm = open("/dev/ptmx", O_RDWR); + if(ptm == -1) + if(openpty(&ptm, &pts, NULL, NULL, NULL) == -1) + err(EXIT_FAILURE, "cannot open pty"); +#endif +#if defined(_XOPEN_SOURCE) + if(ptm != -1) { + if(grantpt(ptm) == -1) + err(EXIT_FAILURE, "cannot grant access to pty"); + if(unlockpt(ptm) == -1) + err(EXIT_FAILURE, "cannot unlock pty"); + ptsdev = ptsname(ptm); + if(!ptsdev) + err(EXIT_FAILURE, "slave pty name undefined"); + pts = open(ptsdev, O_RDWR); + if(pts == -1) + err(EXIT_FAILURE, "cannot open slave pty"); + } + else + err(EXIT_FAILURE, "cannot open pty"); +#endif +} + +void shell(void) { static char *shell = NULL; |