From 90da74ef51ddd51924042ee42b5e766908e9980c Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Sun, 22 Apr 2012 14:41:54 -0400 Subject: implement getusershell, etc. legacy functions I actually wrote these a month ago but forgot to integrate them. ugly, probably-harmful-to-use functions, but some legacy apps want them... --- include/unistd.h | 3 +++ src/misc/getusershell.c | 33 +++++++++++++++++++++++++++++++++ 2 files changed, 36 insertions(+) create mode 100644 src/misc/getusershell.c diff --git a/include/unistd.h b/include/unistd.h index 17f024fd..93098728 100644 --- a/include/unistd.h +++ b/include/unistd.h @@ -163,6 +163,9 @@ char *get_current_dir_name(void); int daemon(int, int); int getdomainname(char *, size_t); int getdtablesize(void); +void setusershell(void); +void endusershell(void); +char *getusershell(void); #endif #define _XOPEN_VERSION 700 diff --git a/src/misc/getusershell.c b/src/misc/getusershell.c new file mode 100644 index 00000000..11e697b6 --- /dev/null +++ b/src/misc/getusershell.c @@ -0,0 +1,33 @@ +#define _GNU_SOURCE +#include +#include +#include + +static const char defshells[] = "/bin/sh\n/bin/csh\n"; + +static char *line; +size_t linesize; +static FILE *f; + +void endusershell(void) +{ + if (f) fclose(f); + f = 0; +} + +void setusershell(void) +{ + if (!f) f = fopen("/etc/shells", "rb"); + if (!f) f = fmemopen((void *)defshells, sizeof defshells - 1, "rb"); +} + +char *getusershell(void) +{ + ssize_t l; + if (!f) setusershell(); + if (!f) return 0; + l = getline(&line, &linesize, f); + if (l <= 0) return 0; + if (line[l-1]=='\n') line[l-1]=0; + return line; +} -- cgit v1.2.1