diff options
Diffstat (limited to 'toys')
| -rw-r--r-- | toys/posix/touch.c | 127 |
1 files changed, 90 insertions, 37 deletions
diff --git a/toys/posix/touch.c b/toys/posix/touch.c index 938863d6..e350e754 100644 --- a/toys/posix/touch.c +++ b/toys/posix/touch.c @@ -4,68 +4,121 @@ * Copyright 2012 Choubey Ji <warior.linux@gmail.com> * * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/touch.html + * acmrtd -USE_TOUCH(NEWTOY(touch, "mr:t:", TOYFLAG_BIN)) +USE_TOUCH(NEWTOY(touch, "acd:mr:t:[!dtr]", TOYFLAG_BIN)) config TOUCH - bool "th" + bool "touch" default y help Usage: Usage: touch [OPTION]... FILE... + Update the access and modification times of each FILE to the current time. - -m change only the modification time - -r, --reference=FILE use this file's times instead of current time - -t STAMP use [[CC]YY]MMDDhhmm[.ss] instead of current time + + -a change access time + -m change modification time + -c don't create file + -d DATE use YYYY-MM-DDThh:mm:SS[.frac][tz] as time + -t TIME use [[CC]YY]MMDDhhmm[.ss][frac] as time + -r FILE use reference file's time */ #define FOR_touch #include "toys.h" GLOBALS( - char *date; + char *time; char *file; + char *date; ) -void touch_main(void) +int fetch(char *file, struct timeval *tv, unsigned flags) { - int fd; - time_t now; - struct utimbuf modinfo; struct stat st; - if (TT.date) { - struct tm *tm = getdate(TT.date); + if (stat(TT.file, &st)) return 1; - if (!tm) perror_exit("bad date '%s'", TT.date); - now = mktime(tm); - } else time(&now); - modinfo.modtime = now; - modinfo.actime = now; - - if (TT.file) { - xstat(TT.file, &st); - modinfo.modtime = st.st_mtime; - modinfo.actime = st.st_atime; + if (flags & FLAG_a) { + tv[0].tv_sec = st.st_atime; + tv[0].tv_usec = st.st_atim.tv_nsec/1000; + } + if (flags & FLAG_m) { + tv[1].tv_sec = st.st_mtime; + tv[1].tv_usec = st.st_mtim.tv_nsec/1000; } - if (toys.optflags & FLAG_m) { - if(stat(toys.optargs[toys.optc - 1], &st) < 0) { - toys.exitval = EXIT_FAILURE; - return; + return 0; +} + +void touch_main(void) +{ + struct timeval tv[2]; + struct tm tm; + char **ss; + int flag; + + gettimeofday(tv, NULL); + localtime_r(&(tv->tv_sec), &tm); + + if (toys.optflags & (FLAG_t|FLAG_d)) { + char *date, *s; + int i, len; + + if (toys.optflags & FLAG_d) { + date = TT.date; + i = strlen(date)-1; + if (*date && toupper(date[i])=='Z') { + putenv("TZ=UTC"); + strncpy(toybuf, date, sizeof(toybuf)-1); + date = toybuf; + date[i]=0; + gmtime_r(&(tv->tv_sec), &tm); + } + s = strptime(date, "%Y-%m-%dT%T", &tm); + if (s && *s=='.') { + sscanf(s, ".%d%n", &i, &len); + s += len; + tv->tv_usec = i; + } + } else { + strcpy(toybuf, "%Y%m%d%H%M"); + date = TT.time; + for (i=0;i<3;i++) { + s = strptime(date, toybuf+(i&2), &tm); + if (s) break; + toybuf[1]='y'; + } + if (s && *s=='.') { + int count = sscanf(s, ".%2d%u%n", &(tm.tm_sec), &i, &len); + if (count==2) tv->tv_usec = i; + s += len; + } } - modinfo.actime = st.st_atime; - if(!(toys.optflags & (FLAG_r|FLAG_t))) { - time(&now); - modinfo.modtime = now; + + errno = 0; + tv->tv_sec = mktime(&tm); + if (!s || *s || errno == EOVERFLOW) { + // Warn Indiana Jones the monkey died. + perror_exit("bad '%s'", date); } } - if (utime(toys.optargs[toys.optc - 1], &modinfo) == -1) { - if ((fd = open(toys.optargs[toys.optc - 1],O_CREAT |O_RDWR, 0644)) != -1) { - close(fd); - utime(toys.optargs[toys.optc - 1], &modinfo); - } else { - perror_msg("can't create '%s'", toys.optargs[toys.optc-1]); - toys.exitval = EXIT_FAILURE; + tv[1]=tv[0]; + + if (TT.file && fetch(TT.file, tv, FLAG_a|FLAG_m)) + perror_exit("-r '%s'", TT.file); + + flag = (~toys.optflags) & (FLAG_m|FLAG_a); + if (flag == (FLAG_m|FLAG_a)) flag = 0; + for (ss=toys.optargs; *ss;) { + int fd; + + if ((!flag || !fetch(*ss, tv, flag)) && !utimes(*ss, tv)) ss++; + else if (toys.optflags & FLAG_c) ss++; + else if (-1 != (fd = open(*ss, O_CREAT, 0666))) close(fd); + else { + perror_msg("'%s'", *ss++); + toys.exitval = 1; } } } |