c8f2f74dd
Denis Vlasenko
2008-02-27
Subject
libbb: add forgotten part of "script" applet change
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libbb/getpty.c+56 -0
| @@ -0,0 +1,56 @@ | |
| + | /* vi: set sw=4 ts=4: */ |
| + | /* |
| + | * Mini getpty implementation for busybox |
| + | * Bjorn Wesen, Axis Communications AB ([email protected]) |
| + | * |
| + | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
| + | */ |
| + | |
| + | #include "libbb.h" |
| + | |
| + | int getpty(char *line, int size) |
| + | { |
| + | int p; |
| + | #if ENABLE_FEATURE_DEVPTS |
| + | p = open("/dev/ptmx", O_RDWR); |
| + | if (p > 0) { |
| + | const char *name; |
| + | grantpt(p); |
| + | unlockpt(p); |
| + | name = ptsname(p); |
| + | if (!name) { |
| + | bb_perror_msg("ptsname error (is /dev/pts mounted?)"); |
| + | return -1; |
| + | } |
| + | safe_strncpy(line, name, size); |
| + | return p; |
| + | } |
| + | #else |
| + | struct stat stb; |
| + | int i; |
| + | int j; |
| + | |
| + | strcpy(line, "/dev/ptyXX"); |
| + | |
| + | for (i = 0; i < 16; i++) { |
| + | line[8] = "pqrstuvwxyzabcde"[i]; |
| + | line[9] = '0'; |
| + | if (stat(line, &stb) < 0) { |
| + | continue; |
| + | } |
| + | for (j = 0; j < 16; j++) { |
| + | line[9] = j < 10 ? j + '0' : j - 10 + 'a'; |
| + | if (DEBUG) |
| + | fprintf(stderr, "Trying to open device: %s\n", line); |
| + | p = open(line, O_RDWR | O_NOCTTY); |
| + | if (p >= 0) { |
| + | line[5] = 't'; |
| + | return p; |
| + | } |
| + | } |
| + | } |
| + | #endif /* FEATURE_DEVPTS */ |
| + | return -1; |
| + | } |
| + | |
| + | |