/* $NetBSD: misc.c,v 1.8 2001/12/06 03:54:05 itojun Exp $ */ /* $OpenBSD: misc.c,v 1.13 2001/12/05 10:06:12 deraadt Exp $ */ /* * Copyright (c) 2000 Markus Friedl. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "includes.h" RCSID("$OpenBSD: misc.c,v 1.13 2001/12/05 10:06:12 deraadt Exp $"); #include "misc.h" #include "log.h" #include "xmalloc.h" /* remove newline at end of string */ char * chop(char *s) { char *t = s; while (*t) { if (*t == '\n' || *t == '\r') { *t = '\0'; return s; } t++; } return s; } /* set/unset filedescriptor to non-blocking */ void set_nonblock(int fd) { int val; val = fcntl(fd, F_GETFL, 0); if (val < 0) { error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno)); return; } if (val & O_NONBLOCK) { debug2("fd %d is O_NONBLOCK", fd); return; } debug("fd %d setting O_NONBLOCK", fd); val |= O_NONBLOCK; if (fcntl(fd, F_SETFL, val) == -1) if (errno != ENODEV) error("fcntl(%d, F_SETFL, O_NONBLOCK): %s", fd, strerror(errno)); } void unset_nonblock(int fd) { int val; val = fcntl(fd, F_GETFL, 0); if (val < 0) { error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno)); return; } if (!(val & O_NONBLOCK)) { debug2("fd %d is not O_NONBLOCK", fd); return; } debug("fd %d clearing O_NONBLOCK", fd); val &= ~O_NONBLOCK; if (fcntl(fd, F_SETFL, val) == -1) if (errno != ENODEV) error("fcntl(%d, F_SETFL, O_NONBLOCK): %s", fd, strerror(errno)); } /* Characters considered whitespace in strsep calls. */ #define WHITESPACE " \t\r\n" /* return next token in configuration line */ char * strdelim(char **s) { char *old; int wspace = 0; if (*s == NULL) return NULL; old = *s; *s = strpbrk(*s, WHITESPACE "="); if (*s == NULL) return (old); /* Allow only one '=' to be skipped */ if (*s[0] == '=') wspace = 1; *s[0] = '\0'; *s += strspn(*s + 1, WHITESPACE) + 1; if (*s[0] == '=' && !wspace) *s += strspn(*s + 1, WHITESPACE) + 1; return (old); } struct passwd * pwcopy(struct passwd *pw) { struct passwd *copy = xmalloc(sizeof(*copy)); memset(copy, 0, sizeof(*copy)); copy->pw_name = xstrdup(pw->pw_name); copy->pw_passwd = xstrdup(pw->pw_passwd); copy->pw_gecos = xstrdup(pw->pw_gecos); copy->pw_uid = pw->pw_uid; copy->pw_gid = pw->pw_gid; copy->pw_expire = pw->pw_expire; copy->pw_change = pw->pw_change; copy->pw_class = xstrdup(pw->pw_class); copy->pw_dir = xstrdup(pw->pw_dir); copy->pw_shell = xstrdup(pw->pw_shell); return copy; } /* * Convert ASCII string to TCP/IP port number. * Port must be >0 and <=65535. * Return 0 if invalid. */ int a2port(const char *s) { long port; char *endp; errno = 0; port = strtol(s, &endp, 0); if (s == endp || *endp != '\0' || (errno == ERANGE && (port == LONG_MIN || port == LONG_MAX)) || port <= 0 || port > 65535) return 0; return port; } #define SECONDS 1 #define MINUTES (SECONDS * 60) #define HOURS (MINUTES * 60) #define DAYS (HOURS * 24) #define WEEKS (DAYS * 7) /* * Convert a time string into seconds; format is * a sequence of: * time[qualifier] * * Valid time qualifiers are: * seconds * s|S seconds * m|M minutes * h|H hours * d|D days * w|W weeks * * Examples: * 90m 90 minutes * 1h30m 90 minutes * 2d 2 days * 1w 1 week * * Return -1 if time string is invalid. */ long convtime(const char *s) { long total, secs; const char *p; char *endp; errno = 0; total = 0; p = s; if (p == NULL || *p == '\0') return -1; while (*p) { secs = strtol(p, &endp, 10); if (p == endp || (errno == ERANGE && (secs == LONG_MIN || secs == LONG_MAX)) || secs < 0) return -1; switch (*endp++) { case '\0': endp--; case 's': case 'S': break; case 'm': case 'M': secs *= MINUTES; break; case 'h': case 'H': secs *= HOURS; break; case 'd': case 'D': secs *= DAYS; break; case 'w': case 'W': secs *= WEEKS; break; default: return -1; } total += secs; if (total < 0) return -1; p = endp; } return total; } char * cleanhostname(char *host) { if (*host == '[' && host[strlen(host) - 1] == ']') { host[strlen(host) - 1] = '\0'; return (host + 1); } else return host; } char * colon(char *cp) { int flag = 0; if (*cp == ':') /* Leading colon is part of file name. */ return (0); if (*cp == '[') flag = 1; for (; *cp; ++cp) { if (*cp == '@' && *(cp+1) == '[') flag = 1; if (*cp == ']' && *(cp+1) == ':' && flag) return (cp+1); if (*cp == ':' && !flag) return (cp); if (*cp == '/') return (0); } return (0); } /* function to assist building execv() arguments */ void addargs(arglist *args, char *fmt, ...) { va_list ap; char buf[1024]; va_start(ap, fmt); vsnprintf(buf, sizeof(buf), fmt, ap); va_end(ap); if (args->list == NULL) { args->nalloc = 32; args->num = 0; } else if (args->num+2 >= args->nalloc) args->nalloc *= 2; args->list = xrealloc(args->list, args->nalloc * sizeof(char *)); args->list[args->num++] = xstrdup(buf); args->list[args->num] = NULL; }