X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/24a7a40d02cc0ea4a7e6fc143f53dd60b2d0d047..784fea9c399df2b90bca112fecf00acbb3989212:/doio.c diff --git a/doio.c b/doio.c index 2da66c6..70b3535 100644 --- a/doio.c +++ b/doio.c @@ -1,6 +1,7 @@ /* doio.c * - * Copyright (c) 1991-2002, Larry Wall + * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, + * 2000, 2001, 2002, 2003, 2004, by Larry Wall and others * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. @@ -14,6 +15,11 @@ * chattering, into calmer and more level reaches." */ +/* This file contains functions that do the actual I/O on behalf of ops. + * For example, pp_print() calls the do_print() function in this file for + * each argument needing printing. + */ + #include "EXTERN.h" #define PERL_IN_DOIO_C #include "perl.h" @@ -47,9 +53,7 @@ # define OPEN_EXCL 0 #endif -#if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX) #include -#endif bool Perl_do_open(pTHX_ GV *gv, register char *name, I32 len, int as_raw, @@ -93,7 +97,7 @@ Perl_do_openn(pTHX_ GV *gv, register char *name, I32 len, int as_raw, /* Collect default raw/crlf info from the op */ if (PL_op && PL_op->op_type == OP_OPEN) { - /* set up disciplines */ + /* set up IO layers */ U8 flags = PL_op->op_private; in_raw = (flags & OPpOPEN_IN_RAW); in_crlf = (flags & OPpOPEN_IN_CRLF); @@ -178,7 +182,7 @@ Perl_do_openn(pTHX_ GV *gv, register char *name, I32 len, int as_raw, (ismodifying & (O_CREAT|appendtrunc))) TAINT_PROPER("sysopen"); } - mode[ix++] = '#'; /* Marker to openn to use numeric "sysopen" */ + mode[ix++] = IoTYPE_NUMERIC; /* Marker to openn to use numeric "sysopen" */ #if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE) rawmode |= O_LARGEFILE; /* Transparently largefiley. */ @@ -211,7 +215,7 @@ Perl_do_openn(pTHX_ GV *gv, register char *name, I32 len, int as_raw, *--tend = '\0'; if (num_svs) { - /* New style explict name, type is just mode and discipline/layer info */ + /* New style explicit name, type is just mode and layer info */ STRLEN l = 0; #ifdef USE_STDIO if (SvROK(*svp) && !strchr(name,'&')) { @@ -235,7 +239,7 @@ Perl_do_openn(pTHX_ GV *gv, register char *name, I32 len, int as_raw, if ((*type == IoTYPE_RDWR) && /* scary */ (*(type+1) == IoTYPE_RDONLY || *(type+1) == IoTYPE_WRONLY) && ((!num_svs || (tend > type+1 && tend[-1] != IoTYPE_PIPE)))) { - TAINT_PROPER("open"); + TAINT_PROPER("open"); mode[1] = *type++; writing = 1; } @@ -243,7 +247,7 @@ Perl_do_openn(pTHX_ GV *gv, register char *name, I32 len, int as_raw, if (*type == IoTYPE_PIPE) { if (num_svs) { if (type[1] != IoTYPE_STD) { - unknown_desr: + unknown_open_mode: Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname); } type++; @@ -288,7 +292,7 @@ Perl_do_openn(pTHX_ GV *gv, register char *name, I32 len, int as_raw, } } } - } + } /* IoTYPE_PIPE */ else if (*type == IoTYPE_WRONLY) { TAINT_PROPER("open"); type++; @@ -323,13 +327,13 @@ Perl_do_openn(pTHX_ GV *gv, register char *name, I32 len, int as_raw, if (num_svs > 1) { Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io)); } + /*SUPPRESS 530*/ + for (; isSPACE(*type); type++) ; if (num_svs && (SvIOK(*svp) || (SvPOK(*svp) && looks_like_number(*svp)))) { fd = SvUV(*svp); num_svs = 0; } else if (isDIGIT(*type)) { - /*SUPPRESS 530*/ - for (; isSPACE(*type); type++) ; fd = atoi(type); } else { @@ -339,8 +343,6 @@ Perl_do_openn(pTHX_ GV *gv, register char *name, I32 len, int as_raw, } else { GV *thatgv; - /*SUPPRESS 530*/ - for (; isSPACE(*type); type++) ; thatgv = gv_fetchpv(type,FALSE,SVt_PVIO); thatio = GvIO(thatgv); } @@ -423,7 +425,9 @@ Perl_do_openn(pTHX_ GV *gv, register char *name, I32 len, int as_raw, fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp); } } /* !& */ - } + if (!fp && type && *type && *type != ':' && !isIDFIRST(*type)) + goto unknown_open_mode; + } /* IoTYPE_WRONLY */ else if (*type == IoTYPE_RDONLY) { /*SUPPRESS 530*/ for (type++; isSPACE(*type); type++) ; @@ -454,8 +458,11 @@ Perl_do_openn(pTHX_ GV *gv, register char *name, I32 len, int as_raw, } fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp); } - } - else if ((num_svs && type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) || + if (!fp && type && *type && *type != ':' && !isIDFIRST(*type)) + goto unknown_open_mode; + } /* IoTYPE_RDONLY */ + else if ((num_svs && /* '-|...' or '...|' */ + type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) || (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) { if (num_svs) { type += 2; /* skip over '-|' */ @@ -500,9 +507,9 @@ Perl_do_openn(pTHX_ GV *gv, register char *name, I32 len, int as_raw, } } } - else { + else { /* layer(Args) */ if (num_svs) - goto unknown_desr; + goto unknown_open_mode; name = type; IoTYPE(io) = IoTYPE_RDONLY; /*SUPPRESS 530*/ @@ -642,8 +649,16 @@ Perl_do_openn(pTHX_ GV *gv, register char *name, I32 len, int as_raw, /* need to close fp without closing underlying fd */ int ofd = PerlIO_fileno(fp); int dupfd = PerlLIO_dup(ofd); +#if defined(HAS_FCNTL) && defined(F_SETFD) + /* Assume if we have F_SETFD we have F_GETFD */ + int coe = fcntl(ofd,F_GETFD); +#endif PerlIO_close(fp); PerlLIO_dup2(dupfd,ofd); +#if defined(HAS_FCNTL) && defined(F_SETFD) + /* The dup trick has lost close-on-exec on ofd */ + fcntl(ofd,F_SETFD, coe); +#endif PerlLIO_close(dupfd); } else @@ -667,8 +682,8 @@ Perl_do_openn(pTHX_ GV *gv, register char *name, I32 len, int as_raw, if (IoTYPE(io) == IoTYPE_SOCKET || (IoTYPE(io) == IoTYPE_WRONLY && fd >= 0 && S_ISCHR(PL_statbuf.st_mode)) ) { char *s = mode; - if (*s == 'I' || *s == '#') - s++; + if (*s == IoTYPE_IMPLICIT || *s == IoTYPE_NUMERIC) + s++; *s = 'w'; if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,s,fd,0,0,NULL,0,svp))) { PerlIO_close(fp); @@ -713,12 +728,16 @@ Perl_nextargv(pTHX_ register GV *gv) if (PL_filemode & (S_ISUID|S_ISGID)) { PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */ #ifdef HAS_FCHMOD - (void)fchmod(PL_lastfd,PL_filemode); + if (PL_lastfd != -1) + (void)fchmod(PL_lastfd,PL_filemode); #else (void)PerlLIO_chmod(PL_oldname,PL_filemode); #endif } + PL_lastfd = -1; PL_filemode = 0; + if (!GvAV(gv)) + return Nullfp; while (av_len(GvAV(gv)) >= 0) { STRLEN oldlen; sv = av_shift(GvAV(gv)); @@ -775,8 +794,8 @@ Perl_nextargv(pTHX_ register GV *gv) { if (ckWARN_d(WARN_INPLACE)) Perl_warner(aTHX_ packWARN(WARN_INPLACE), - "Can't do inplace edit: %s would not be unique", - SvPVX(sv)); + "Can't do inplace edit: %"SVf" would not be unique", + sv); do_close(gv,FALSE); continue; } @@ -786,8 +805,8 @@ Perl_nextargv(pTHX_ register GV *gv) if (PerlLIO_rename(PL_oldname,SvPVX(sv)) < 0) { if (ckWARN_d(WARN_INPLACE)) Perl_warner(aTHX_ packWARN(WARN_INPLACE), - "Can't rename %s to %s: %s, skipping file", - PL_oldname, SvPVX(sv), Strerror(errno) ); + "Can't rename %s to %"SVf": %s, skipping file", + PL_oldname, sv, Strerror(errno) ); do_close(gv,FALSE); continue; } @@ -802,8 +821,8 @@ Perl_nextargv(pTHX_ register GV *gv) if (link(PL_oldname,SvPVX(sv)) < 0) { if (ckWARN_d(WARN_INPLACE)) Perl_warner(aTHX_ packWARN(WARN_INPLACE), - "Can't rename %s to %s: %s, skipping file", - PL_oldname, SvPVX(sv), Strerror(errno) ); + "Can't rename %s to %"SVf": %s, skipping file", + PL_oldname, sv, Strerror(errno) ); do_close(gv,FALSE); continue; } @@ -923,8 +942,8 @@ Perl_do_pipe(pTHX_ SV *sv, GV *rgv, GV *wgv) if (PerlProc_pipe(fd) < 0) goto badexit; - IoIFP(rstio) = PerlIO_fdopen(fd[0], "r"); - IoOFP(wstio) = PerlIO_fdopen(fd[1], "w"); + IoIFP(rstio) = PerlIO_fdopen(fd[0], "r"PIPE_OPEN_MODE); + IoOFP(wstio) = PerlIO_fdopen(fd[1], "w"PIPE_OPEN_MODE); IoOFP(rstio) = IoIFP(rstio); IoIFP(wstio) = IoOFP(wstio); IoTYPE(rstio) = IoTYPE_RDONLY; @@ -1029,17 +1048,21 @@ Perl_do_eof(pTHX_ GV *gv) report_evil_fh(gv, io, OP_phoney_OUTPUT_ONLY); while (IoIFP(io)) { + int saverrno; if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */ if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */ return FALSE; /* this is the most usual case */ } + saverrno = errno; /* getc and ungetc can stomp on errno */ ch = PerlIO_getc(IoIFP(io)); if (ch != EOF) { (void)PerlIO_ungetc(IoIFP(io),ch); + errno = saverrno; return FALSE; } + errno = saverrno; if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) { if (PerlIO_get_cnt(IoIFP(io)) < -1) @@ -1152,8 +1175,9 @@ fail_discipline: if (!end) end = s+len; #ifndef PERLIO_LAYERS - Perl_croak(aTHX_ "Unknown discipline '%.*s'", end-s, s); + Perl_croak(aTHX_ "IO layers (like '%.*s') unavailable", end-s, s); #else + len -= end-s; s = end; #endif } @@ -1252,7 +1276,7 @@ Perl_do_print(pTHX_ register SV *sv, PerlIO *fp) switch (SvTYPE(sv)) { case SVt_NULL: if (ckWARN(WARN_UNINITIALIZED)) - report_uninit(); + report_uninit(sv); return TRUE; case SVt_IV: if (SvIOK(sv)) { @@ -1268,7 +1292,8 @@ Perl_do_print(pTHX_ register SV *sv, PerlIO *fp) default: if (PerlIO_isutf8(fp)) { if (!SvUTF8(sv)) - sv_utf8_upgrade(sv = sv_mortalcopy(sv)); + sv_utf8_upgrade_flags(sv = sv_mortalcopy(sv), + SV_GMAGIC|SV_UTF8_NO_ENCODING); } else if (DO_UTF8(sv)) { if (!sv_utf8_downgrade((sv = sv_mortalcopy(sv)), TRUE) @@ -1319,10 +1344,13 @@ Perl_my_stat(pTHX) return (PL_laststatval = -1); } } + else if (PL_op->op_private & OPpFT_STACKED) { + return PL_laststatval; + } else { SV* sv = POPs; char *s; - STRLEN n_a; + STRLEN len; PUTBACK; if (SvTYPE(sv) == SVt_PVGV) { gv = (GV*)sv; @@ -1333,9 +1361,10 @@ Perl_my_stat(pTHX) goto do_fstat; } - s = SvPV(sv, n_a); + s = SvPV(sv, len); PL_statgv = Nullgv; - sv_setpv(PL_statname, s); + sv_setpvn(PL_statname, s, len); + s = SvPVX(PL_statname); /* s now NUL-terminated */ PL_laststype = OP_STAT; PL_laststatval = PerlLIO_stat(s, &PL_statcache); if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n')) @@ -1344,6 +1373,8 @@ Perl_my_stat(pTHX) } } +static char no_prev_lstat[] = "The stat preceding -l _ wasn't an lstat"; + I32 Perl_my_lstat(pTHX) { @@ -1354,7 +1385,7 @@ Perl_my_lstat(pTHX) EXTEND(SP,1); if (cGVOP_gv == PL_defgv) { if (PL_laststype != OP_LSTAT) - Perl_croak(aTHX_ "The stat preceding -l _ wasn't an lstat"); + Perl_croak(aTHX_ no_prev_lstat); return PL_laststatval; } if (ckWARN(WARN_IO)) { @@ -1363,6 +1394,9 @@ Perl_my_lstat(pTHX) return (PL_laststatval = -1); } } + else if (ckWARN(WARN_IO) && PL_laststype != OP_LSTAT + && (PL_op->op_private & OPpFT_STACKED)) + Perl_croak(aTHX_ no_prev_lstat); PL_laststype = OP_LSTAT; PL_statgv = Nullgv; @@ -1380,11 +1414,13 @@ Perl_my_lstat(pTHX) return PL_laststatval; } +#ifndef OS2 bool Perl_do_aexec(pTHX_ SV *really, register SV **mark, register SV **sp) { return do_aexec5(really, mark, sp, 0, 0); } +#endif bool Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp, @@ -1412,10 +1448,12 @@ Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp, if ((!really && *PL_Argv[0] != '/') || (really && *tmps != '/')) /* will execvp use PATH? */ TAINT_ENV(); /* testing IFS here is overkill, probably */ + PERL_FPU_PRE_EXEC if (really && *tmps) PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv)); else PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv)); + PERL_FPU_POST_EXEC if (ckWARN(WARN_EXEC)) Perl_warner(aTHX_ packWARN(WARN_EXEC), "Can't exec \"%s\": %s", (really ? tmps : PL_Argv[0]), Strerror(errno)); @@ -1485,7 +1523,9 @@ Perl_do_exec3(pTHX_ char *cmd, int fd, int do_report) *--s = '\0'; if (s[-1] == '\'') { *--s = '\0'; + PERL_FPU_PRE_EXEC PerlProc_execl(PL_cshname,"csh", flags, ncmd, (char*)0); + PERL_FPU_POST_EXEC *s = '\''; return FALSE; } @@ -1522,13 +1562,15 @@ Perl_do_exec3(pTHX_ char *cmd, int fd, int do_report) while (*t && isSPACE(*t)) ++t; - if (!*t && (dup2(1,2) != -1)) { + if (!*t && (PerlLIO_dup2(1,2) != -1)) { s[-2] = '\0'; break; } } doshell: + PERL_FPU_PRE_EXEC PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0); + PERL_FPU_POST_EXEC return FALSE; } } @@ -1546,7 +1588,9 @@ Perl_do_exec3(pTHX_ char *cmd, int fd, int do_report) } *a = Nullch; if (PL_Argv[0]) { + PERL_FPU_PRE_EXEC PerlProc_execvp(PL_Argv[0],PL_Argv); + PERL_FPU_POST_EXEC if (errno == ENOEXEC) { /* for system V NIH syndrome */ do_execfree(); goto doshell; @@ -1642,10 +1686,10 @@ nothing in the core. if (mark == sp) break; s = SvPVx(*++mark, n_a); - if (isUPPER(*s)) { + if (isALPHA(*s)) { if (*s == 'S' && s[1] == 'I' && s[2] == 'G') s += 3; - if (!(val = whichsig(s))) + if ((val = whichsig(s)) < 0) Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s); } else @@ -1745,22 +1789,23 @@ nothing in the core. SV* modified = *++mark; void * utbufp = &utbuf; - /* be like C, and if both times are undefined, let the C - library figure out what to do. This usually means - "current time" */ + /* Be like C, and if both times are undefined, let the C + * library figure out what to do. This usually means + * "current time". */ if ( accessed == &PL_sv_undef && modified == &PL_sv_undef ) - utbufp = NULL; - - Zero(&utbuf, sizeof utbuf, char); + utbufp = NULL; + else { + Zero(&utbuf, sizeof utbuf, char); #ifdef BIG_TIME - utbuf.actime = (Time_t)SvNVx(accessed); /* time accessed */ - utbuf.modtime = (Time_t)SvNVx(modified); /* time modified */ + utbuf.actime = (Time_t)SvNVx(accessed); /* time accessed */ + utbuf.modtime = (Time_t)SvNVx(modified); /* time modified */ #else - utbuf.actime = (Time_t)SvIVx(accessed); /* time accessed */ - utbuf.modtime = (Time_t)SvIVx(modified); /* time modified */ + utbuf.actime = (Time_t)SvIVx(accessed); /* time accessed */ + utbuf.modtime = (Time_t)SvIVx(modified); /* time modified */ #endif - APPLY_TAINT_PROPER(); + } + APPLY_TAINT_PROPER(); tot = sp - mark; while (++mark <= sp) { char *name = SvPVx(*mark, n_a); @@ -2259,8 +2304,9 @@ Perl_start_glob (pTHX_ SV *tmpglob, IO *io) if (*cp == '?') *cp = '%'; /* VMS style single-char wildcard */ while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt, &dfltdsc,NULL,NULL,NULL))&1)) { - end = rstr + (unsigned long int) *rslt; - if (!hasver) while (*end != ';') end--; + /* with varying string, 1st word of buffer contains result length */ + end = rstr + *((unsigned short int*)rslt); + if (!hasver) while (*end != ';' && end > rstr) end--; *(end++) = '\n'; *end = '\0'; for (cp = rstr; *cp; cp++) *cp = _tolower(*cp); if (hasdir) {