#include "calld.h" int /* return 0 if OK, -1 on error */ request(Client *cliptr) { pid_t pid; /* * Position where this client left off last (or rewind). */ errmsg[0] = 0; sys_posn(cliptr->sysftell); while ((cliptr->sysftell = sys_next(&systems)) >= 0) { if (strcmp(cliptr->sysname, systems.name) == 0) { /* * System match; * if client specified a speed, it must match too. */ if (cliptr->speed[0] != 0 && strcmp(cliptr->speed, systems.class) != 0) continue; /* speeds don't match */ DEBUG("trying sys: %s, %s, %s, %s", systems.name, systems.type, systems.class, systems.phone); cliptr->foundone++; if (dev_find(&devices, &systems) < 0) break; DEBUG("trying dev: %s, %s, %s, %s", devices.type, devices.line, devices.class, devices.dialer); if ((pid = is_locked(devices.line)) != 0) { sprintf(errmsg, "device `%s' already locked by pid %d\n", devices.line, pid); continue; /* look for another entry in Systems file */ } /* * We've found a device that's not locked. * fork() a child to to the actual dialing. */ TELL_WAIT(); if ((cliptr->pid = fork()) < 0) { log_sys("fork error"); } else if (cliptr->pid == 0) { /* child */ WAIT_PARENT(); /* let parent set lock */ child_dial(cliptr); /* never returns */ } /* parent */ lock_set(devices.line, cliptr->pid); /* * Let child resume, now that lock is set. */ TELL_CHILD(cliptr->pid); return(0); /* we've started a child */ } } /* * Reached EOF on Systems file. */ if (cliptr->foundone == 0) sprintf(errmsg, "system `%s' not found\n", cliptr->sysname); else if (errmsg[0] == 0) sprintf(errmsg, "unable to connect to system `%s'\n", cliptr->sysname); return(-1); /* also, cliptr->sysftell is -1 */ }
