diff options
Diffstat (limited to 'date.c')
| -rw-r--r-- | date.c | 451 |
1 files changed, 223 insertions, 228 deletions
@@ -1,3 +1,4 @@ +/* vi: set sw=4 ts=4: */ /* * Mini date implementation for busybox * @@ -38,12 +39,13 @@ an RFC 822 complient date output for shell scripting mail commands */ -static const char date_usage[] = "date [OPTION]... [+FORMAT]\n" -" or: date [OPTION] [MMDDhhmm[[CC]YY][.ss]]\n\n" -"Display the current time in the given FORMAT, or set the system date.\n" -"\nOptions:\n\t-R\t\toutput RFC-822 compliant date string\n" -"\t-s\t\tset time described by STRING\n" -"\t-u\t\tprint or set Coordinated Universal Time\n"; +static const char date_usage[] = "date [OPTION]... [+FORMAT]\n" + " or: date [OPTION] [MMDDhhmm[[CC]YY][.ss]]\n\n" + "Display the current time in the given FORMAT, or set the system date.\n" + "\nOptions:\n\t-R\t\toutput RFC-822 compliant date string\n" + "\t-s\t\tset time described by STRING\n" + + "\t-u\t\tprint or set Coordinated Universal Time\n"; /* Input parsing code is always bulky - used heavy duty libc stuff as @@ -51,240 +53,233 @@ static const char date_usage[] = "date [OPTION]... [+FORMAT]\n" /* Default input handling to save suprising some people */ -struct tm * -date_conv_time(struct tm *tm_time, const char *t_string) { - int nr; - - nr = sscanf(t_string, "%2d%2d%2d%2d%d", - &(tm_time->tm_mon), - &(tm_time->tm_mday), - &(tm_time->tm_hour), - &(tm_time->tm_min), - &(tm_time->tm_year)); - - if(nr < 4 || nr > 5) { - fprintf(stderr, invalid_date, "date", t_string); - exit( FALSE); - } - - /* correct for century - minor Y2K problem here? */ - if(tm_time->tm_year >= 1900) - tm_time->tm_year -= 1900; - /* adjust date */ - tm_time->tm_mon -= 1; - - return(tm_time); +struct tm *date_conv_time(struct tm *tm_time, const char *t_string) +{ + int nr; + + nr = sscanf(t_string, "%2d%2d%2d%2d%d", + &(tm_time->tm_mon), + &(tm_time->tm_mday), + &(tm_time->tm_hour), + &(tm_time->tm_min), &(tm_time->tm_year)); + + if (nr < 4 || nr > 5) { + fprintf(stderr, invalid_date, "date", t_string); + exit(FALSE); + } + + /* correct for century - minor Y2K problem here? */ + if (tm_time->tm_year >= 1900) + tm_time->tm_year -= 1900; + /* adjust date */ + tm_time->tm_mon -= 1; + + return (tm_time); } /* The new stuff for LRP */ -struct tm * -date_conv_ftime(struct tm *tm_time, const char *t_string) { - struct tm itm_time, jtm_time, ktm_time, \ - ltm_time, mtm_time, ntm_time; - - itm_time = *tm_time; - jtm_time = *tm_time; - ktm_time = *tm_time; - ltm_time = *tm_time; - mtm_time = *tm_time; - ntm_time = *tm_time; - - /* Parse input and assign appropriately to tm_time */ - - if(sscanf(t_string, "%d:%d:%d", - &itm_time.tm_hour, - &itm_time.tm_min, - &itm_time.tm_sec) == 3 ) { - - *tm_time = itm_time; - return(tm_time); - - } else if (sscanf(t_string, "%d:%d", - &jtm_time.tm_hour, - &jtm_time.tm_min) == 2) { - - *tm_time = jtm_time; - return(tm_time); - - } else if (sscanf(t_string, "%d.%d-%d:%d:%d", - &ktm_time.tm_mon, - &ktm_time.tm_mday, - &ktm_time.tm_hour, - &ktm_time.tm_min, - &ktm_time.tm_sec) == 5) { - - ktm_time.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */ - *tm_time = ktm_time; - return(tm_time); - - } else if (sscanf(t_string, "%d.%d-%d:%d", - <m_time.tm_mon, - <m_time.tm_mday, - <m_time.tm_hour, - <m_time.tm_min) == 4) { - - ltm_time.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */ - *tm_time = ltm_time; - return(tm_time); - - } else if (sscanf(t_string, "%d.%d.%d-%d:%d:%d", - &mtm_time.tm_year, - &mtm_time.tm_mon, - &mtm_time.tm_mday, - &mtm_time.tm_hour, - &mtm_time.tm_min, - &mtm_time.tm_sec) == 6) { - - mtm_time.tm_year -= 1900; /* Adjust years */ - mtm_time.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */ - *tm_time = mtm_time; - return(tm_time); - - } else if (sscanf(t_string, "%d.%d.%d-%d:%d", - &ntm_time.tm_year, - &ntm_time.tm_mon, - &ntm_time.tm_mday, - &ntm_time.tm_hour, - &ntm_time.tm_min) == 5) { - ntm_time.tm_year -= 1900; /* Adjust years */ - ntm_time.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */ - *tm_time = ntm_time; - return(tm_time); - - } - - fprintf(stderr, invalid_date, "date", t_string); - - exit( FALSE); +struct tm *date_conv_ftime(struct tm *tm_time, const char *t_string) +{ + struct tm itm_time, jtm_time, ktm_time, ltm_time, mtm_time, ntm_time; + + itm_time = *tm_time; + jtm_time = *tm_time; + ktm_time = *tm_time; + ltm_time = *tm_time; + mtm_time = *tm_time; + ntm_time = *tm_time; + + /* Parse input and assign appropriately to tm_time */ + + if (sscanf(t_string, "%d:%d:%d", + &itm_time.tm_hour, &itm_time.tm_min, &itm_time.tm_sec) == 3) { + + *tm_time = itm_time; + return (tm_time); + + } else if (sscanf(t_string, "%d:%d", + &jtm_time.tm_hour, &jtm_time.tm_min) == 2) { + + *tm_time = jtm_time; + return (tm_time); + + } else if (sscanf(t_string, "%d.%d-%d:%d:%d", + &ktm_time.tm_mon, + &ktm_time.tm_mday, + &ktm_time.tm_hour, + &ktm_time.tm_min, &ktm_time.tm_sec) == 5) { + + ktm_time.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */ + *tm_time = ktm_time; + return (tm_time); + + } else if (sscanf(t_string, "%d.%d-%d:%d", + <m_time.tm_mon, + <m_time.tm_mday, + <m_time.tm_hour, <m_time.tm_min) == 4) { + + ltm_time.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */ + *tm_time = ltm_time; + return (tm_time); + + } else if (sscanf(t_string, "%d.%d.%d-%d:%d:%d", + &mtm_time.tm_year, + &mtm_time.tm_mon, + &mtm_time.tm_mday, + &mtm_time.tm_hour, + &mtm_time.tm_min, &mtm_time.tm_sec) == 6) { + + mtm_time.tm_year -= 1900; /* Adjust years */ + mtm_time.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */ + *tm_time = mtm_time; + return (tm_time); + + } else if (sscanf(t_string, "%d.%d.%d-%d:%d", + &ntm_time.tm_year, + &ntm_time.tm_mon, + &ntm_time.tm_mday, + &ntm_time.tm_hour, &ntm_time.tm_min) == 5) { + ntm_time.tm_year -= 1900; /* Adjust years */ + ntm_time.tm_mon -= 1; /* Adjust dates from 1-12 to 0-11 */ + *tm_time = ntm_time; + return (tm_time); + + } + + fprintf(stderr, invalid_date, "date", t_string); + + exit(FALSE); } -int -date_main(int argc, char * * argv) +int date_main(int argc, char **argv) { - char *date_str = NULL; - char *date_fmt = NULL; - char *t_buff; - int i; - int set_time = 0; - int rfc822 = 0; - int utc = 0; - int use_arg = 0; - time_t tm; - struct tm tm_time; - - /* Interpret command line args */ - i = --argc; - argv++; - while (i > 0 && **argv) { - if (**argv == '-') { - while (i>0 && *++(*argv)) switch (**argv) { - case 'R': - rfc822 = 1; - break; - case 's': - set_time = 1; - if(date_str != NULL) usage ( date_usage); - date_str = optarg; - break; - case 'u': - utc = 1; - if (putenv ("TZ=UTC0") != 0) { - fprintf(stderr, memory_exhausted, "date"); - exit( FALSE); + char *date_str = NULL; + char *date_fmt = NULL; + char *t_buff; + int i; + int set_time = 0; + int rfc822 = 0; + int utc = 0; + int use_arg = 0; + time_t tm; + struct tm tm_time; + + /* Interpret command line args */ + i = --argc; + argv++; + while (i > 0 && **argv) { + if (**argv == '-') { + while (i > 0 && *++(*argv)) + switch (**argv) { + case 'R': + rfc822 = 1; + break; + case 's': + set_time = 1; + if (date_str != NULL) + usage(date_usage); + date_str = optarg; + break; + case 'u': + utc = 1; + if (putenv("TZ=UTC0") != 0) { + fprintf(stderr, memory_exhausted, "date"); + exit(FALSE); + } + /* Look ma, no break. Don't fix it either. */ + case 'd': + use_arg = 1; + if (date_str != NULL) + usage(date_usage); + date_str = optarg; + break; + case '-': + usage(date_usage); + } + } else { + if ((date_fmt == NULL) && (strcmp(*argv, "+") == 0)) + date_fmt = *argv; + else if (date_str == NULL) { + set_time = 1; + date_str = *argv; + } else { + usage(date_usage); + } } - /* Look ma, no break. Don't fix it either. */ - case 'd': - use_arg = 1; - if(date_str != NULL) usage ( date_usage); - date_str = optarg; - break; - case '-': - usage ( date_usage); - } - } else { - if ( (date_fmt == NULL) && (strcmp(*argv, "+")==0) ) - date_fmt=*argv; - else if (date_str == NULL) { - set_time = 1; - date_str=*argv; - } else { - usage ( date_usage); - } + i--; + argv++; } - i--; - argv++; - } - - - /* Now we have parsed all the information except the date format - which depends on whether the clock is being set or read */ - - time(&tm); - memcpy(&tm_time, localtime(&tm), sizeof(tm_time)); - /* Zero out fields - take her back to midnight!*/ - if(date_str != NULL) { - tm_time.tm_sec = 0; - tm_time.tm_min = 0; - tm_time.tm_hour = 0; - } - - /* Process any date input to UNIX time since 1 Jan 1970 */ - if(date_str != NULL) { - - if(strchr(date_str, ':') != NULL) { - date_conv_ftime(&tm_time, date_str); - } else { - date_conv_time(&tm_time, date_str); - } - - /* Correct any day of week and day of year etc fields */ - tm = mktime(&tm_time); - if (tm < 0 ) { - fprintf(stderr, invalid_date, "date", date_str); - exit( FALSE); - } - - /* if setting time, set it */ - if(set_time) { - if( stime(&tm) < 0) { - fprintf(stderr, "date: can't set date.\n"); - exit( FALSE); - } - } - } - - /* Display output */ - - /* Deal with format string */ - if(date_fmt == NULL) { - date_fmt = (rfc822 - ? (utc - ? "%a, %_d %b %Y %H:%M:%S GMT" - : "%a, %_d %b %Y %H:%M:%S %z") - : "%a %b %e %H:%M:%S %Z %Y"); - - } else if ( *date_fmt == '\0' ) { - /* Imitate what GNU 'date' does with NO format string! */ - printf ("\n"); - exit( TRUE); - } - - /* Handle special conversions */ - - if( strncmp( date_fmt, "%f", 2) == 0 ) { - date_fmt = "%Y.%m.%d-%H:%M:%S"; - } - - /* Print OUTPUT (after ALL that!) */ - t_buff = malloc(201); - strftime(t_buff, 200, date_fmt, &tm_time); - printf("%s\n", t_buff); - - exit( TRUE); + + + /* Now we have parsed all the information except the date format + which depends on whether the clock is being set or read */ + + time(&tm); + memcpy(&tm_time, localtime(&tm), sizeof(tm_time)); + /* Zero out fields - take her back to midnight! */ + if (date_str != NULL) { + tm_time.tm_sec = 0; + tm_time.tm_min = 0; + tm_time.tm_hour = 0; + } + + /* Process any date input to UNIX time since 1 Jan 1970 */ + if (date_str != NULL) { + + if (strchr(date_str, ':') != NULL) { + date_conv_ftime(&tm_time, date_str); + } else { + date_conv_time(&tm_time, date_str); + } + + /* Correct any day of week and day of year etc fields */ + tm = mktime(&tm_time); + if (tm < 0) { + fprintf(stderr, invalid_date, "date", date_str); + exit(FALSE); + } + + /* if setting time, set it */ + if (set_time) { + if (stime(&tm) < 0) { + fprintf(stderr, "date: can't set date.\n"); + exit(FALSE); + } + } + } + + /* Display output */ + + /* Deal with format string */ + if (date_fmt == NULL) { + date_fmt = (rfc822 + ? (utc + ? "%a, %_d %b %Y %H:%M:%S GMT" + : "%a, %_d %b %Y %H:%M:%S %z") + : "%a %b %e %H:%M:%S %Z %Y"); + + } else if (*date_fmt == '\0') { + /* Imitate what GNU 'date' does with NO format string! */ + printf("\n"); + exit(TRUE); + } + + /* Handle special conversions */ + + if (strncmp(date_fmt, "%f", 2) == 0) { + date_fmt = "%Y.%m.%d-%H:%M:%S"; + } + + /* Print OUTPUT (after ALL that!) */ + t_buff = malloc(201); + strftime(t_buff, 200, date_fmt, &tm_time); + printf("%s\n", t_buff); + + exit(TRUE); } |